Relevant bibliographies by topics / Multi Body Dynamic

Academic literature on the topic 'Multi Body Dynamic'

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Published: 14 March 2023

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Journal articles on the topic "Multi Body Dynamic"

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Park, Dongil, and Doohyung Kim. "Vibration Analysis of the Flexible Beam Using Dynamic Solver K_Sim." Journal of Advance Research in Mechanical & Civil Engineering (ISSN: 2208-2379) 2, no. 12 (December 31, 2015): 01–06. http://dx.doi.org/10.53555/nnmce.v2i12.324.

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We developed the dynamic solver including the pre-processor with GUI, kinematic/dynamic solver and the post-processor. This can support to analyze the flexible body dynamics as well as the rigid body dynamics. Because almost robot system has the multi bodies including some flexible bodies, multi flexible body dynamics is very important. In the paper, we carried out the vibration analysis of the flexible beam using the developed dynamic solver K_Sim and compared it to the commercial multi flexible body dynamic solver.
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Jingyang, Zhong, Song Bifeng, and Wang Jin. "Flapping Wing Multi-body Dynamic Simulation." Procedia Engineering 99 (2015): 885–90. http://dx.doi.org/10.1016/j.proeng.2014.12.617.

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Rahnejat, H. "Multi-body dynamics: Historical evolution and application." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 214, no. 1 (January 1, 2000): 149–73. http://dx.doi.org/10.1243/0954406001522886.

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The historical developments in the discipline of engineering dynamics are briefly reviewed, with attention paid to the formulation and solution of the dynamic behaviour of multi-body systems. It is shown that the dynamic characteristics of practical multi-body systems are dependent upon the interactions of many physical phenomena that can induce, restrain or constrain motion of parts. The long process of understanding and formulating the physics of multi-body motions, in some cases with pioneering contributions centuries old, together with continual refinements in numerical techniques and enhanced computing power has resulted in the solution of quite complex and practical engineering problems. Linking the historical developments to the fundamental physical phenomena and their interactions, the paper presents solutions to two complex multi-body dynamic problems. The practical implications of the approach in design of these systems are highlighted.
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Jin, Kun Feng, and Ting Qiang Yao. "Multi-Body Contact Dynamics Analysis of Angular Contact Ball Bearing." Applied Mechanics and Materials 444-445 (October 2013): 45–49. http://dx.doi.org/10.4028/www.scientific.net/amm.444-445.45.

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The 3-D multi-body contact dynamics simulation model was built by ADAMS base on the Hertz contact theory and multi-body contact dynamics, which considered the dynamics relationship among the ball, ring and cage of the bearing. Considering the clearancesfrictions and loads, results that contained deformation and displacement of the bearing, trajectory of the CM of the cage and the dynamic contact force were obtained by means of the 3-D multi-body contact dynamics model simulation and statics calculation. The outcomes got from two different methods are consistent, so the 3-D multi-body contact dynamics simulation model has the positive significance on dynamic design and engineering application of the bearing.
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Du, Nei Juan, Yue Guo Shen, and Jun Hai Zhang. "The Dynamic Response Analysis of the Multi-Body System with Floating Base Based on the ADAMS." Applied Mechanics and Materials 574 (July 2014): 58–61. http://dx.doi.org/10.4028/www.scientific.net/amm.574.58.

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The dynamic response analysis of the multi-body system with floating base includes the interaction between bodies and flow field as well as the one inside the multi-body system, which needs to use both the time-domain theory about the interaction between the object and the flow field and the method of multi-body system dynamics. With the growing complexity of the upper body, the multi-body system with floating base, whose generalized modeling and analysis become an inevitable trend.Using ADAMS(Automatic Dynamic Analysis of Mechanical System) for multi-body system dynamics analysis has unique advantages. It integrates modeling, solving and visualization technology. It also can realize automatically statics, kinematics and dynamics analysis. In this paper, the feasibility of ADAMS software and some related key issues are discussed, including the system architecture, fluid force analysis, fluid-structure coupling calculation module and ADAMS multi-body dynamics analysis module of data generation and transmission, etc.
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Siano, D., and R. Citarella. "Elastic Multi Body Simulation of a Multi-Cylinder Engine." Open Mechanical Engineering Journal 8, no. 1 (June 13, 2014): 157–69. http://dx.doi.org/10.2174/1874155x01408010157.

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This paper analyzes the vibration behavior of an in-line 4-cylinder, 4-strokes, internal combustion turbocharged direct injection gasoline engine. A detailed multi-body numerical model of the engine prototype was used to characterize the whole engine dynamic behavior, in terms of forces and velocities. The crank train multi-body model was created starting from engine geometrical data, and the available combustion loads were employed for the Multi-Body Dynamic Simulation (MBDS). A combined usage of FEM and multi body methodologies were adopted for the dynamic analysis: both crankshaft and cylinder block were considered as flexible bodies, whereas all the other components were considered as rigid. The engine mounts were considered as flexible elements with given stiffness and damping. The hydrodynamic bearings were also modelling. The software LMS Virtual Lab (modules PDS and Motion) and ANSYS were used for the simulation.
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Huang, Qing, Zhi Li, and Hong-qian Xue. "Multi-body dynamics co-simulation of hoisting wire rope." Journal of Strain Analysis for Engineering Design 53, no. 1 (December 6, 2017): 36–45. http://dx.doi.org/10.1177/0309324717744146.

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As more wire ropes with complex construction are used in the hoisting system of a crane, it becomes more necessary to predict the risks of the hoisting operation. Especially the wire rope, dynamic analysis is required to manage the potential risk in advance. Thus, in this article, a co-simulation method based on multi-body dynamics and finite element method is proposed to determine the dynamic responses of a hoisting system and wire rope. We developed a dynamic model of hoisting system based on ADAMS/Cable to formulate the time history response of dynamic force on wire rope, which could be used as the loading condition in the posterior finite element model. A three-dimensional geometric model for the multi-layered strands wire rope with a construction of 1+7+7 / 7+14 wires is implemented in the finite element analysis software ABAQUS, and both static and dynamic analyses are presented. The static analysis result of force–strain relation is compared with several experiment data, and the finite element model is proved accurate and reliable. In the latter case, the force–time curves obtained by dynamic model are imported to finite element model as loading condition to accomplish dynamic analysis. The co-simulation results of hoisting wire rope’s behavior subjected to dynamic loading during the hoisting process are carried out and discussed. The stress distribution and stress spectrum of wire rope are obtained, and the results show that the most dangerous regions are the lateral side of wire rope, especially the contact area of two wires in strands.
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Hale-Heighway, B., S. Douglas, M. Gilmartin, and C. Murray. "Multi-body dynamic modelling of commercial vehicles." Computing & Control Engineering Journal 13, no. 1 (February 1, 2002): 11–15. http://dx.doi.org/10.1049/cce:20020102.

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Callegari, M., F. Cannella, and G. Ferri. "Multi-body modelling of timing belt dynamics." Proceedings of the Institution of Mechanical Engineers, Part K: Journal of Multi-body Dynamics 217, no. 1 (March 1, 2003): 63–75. http://dx.doi.org/10.1243/146441903763049450.

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Although timing belt drives have recently been increasingly used in mechanical design, their behaviour is still considered to a large extent to be unpredictable, especially under varying operative conditions. The acoustic emission of the transmissions, above all, has been thoroughly investigated in past years, but noise still represents an unresolved problem for many applications and a concern for belt designers; therefore, the availability of good predictive models would be very useful for both design and application phases. The present work describes a multi-body numerical model that has been developed for the characterization of the dynamic behaviour of timing belt transmissions, with the final goal of assessing the acoustic radiation of a given design. Modelling and simulation have been performed by means of commercial software packages, but more additional programming was required to obtain dynamic models capable of simulating the complex behaviour of toothed belt transmissions. Several experimental tests have been performed to identify the many parameters that influence system dynamics and to validate the resulting computer aided engineering (CAE) model.
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Ni, Hong, Li Xing Sun, and Zhi Xuan Zhang. "The Computational Multi-Body Dynamics for Motorcycle on its Oscillation Properties." Applied Mechanics and Materials 373-375 (August 2013): 76–83. http://dx.doi.org/10.4028/www.scientific.net/amm.373-375.76.

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Based on 3D digital model of motorcycle constructed in UGNX, motorcycle multi-body model was established for dynamic behavior analysis under inbuilt assembling of coefficient matrix of dynamical equation in computation code of ADAMS. Through the comparison of simulation analysis for dynamics of different models in accelerations in time and frequency domains, it is concluded that realistic multi-body model better represents the dynamic behavior of motorcycle while simplified one with less physical parameters only provides qualitative analysis for the dynamic behavior. The simulation results shows that model IV with accurate parameters of components influences the dynamic response of frame, simplified models could not represent the influence of mass and inertia moment of subsystems on dynamic behavior, which means advanced motorcycle multi-body improves simulation effectiveness and approximates the dynamic behavior of motorcycle well so that the simulation developed to replace experiments in bad working conditions will promote the advancement of engineering.
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Dissertations / Theses on the topic "Multi Body Dynamic"

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Taghipour, Reza. "Efficient Prediction of Dynamic Response for Flexible and Multi- Body Marine Structures." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2008. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-2321.

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Sundling, Emma. "Validation toolbox for a Physics Engine." Thesis, Umeå universitet, Institutionen för fysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-121972.

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Physics engines become more and more common due to the rapid development and increasing demand of simulations. With this comes a need of testing the engine, a way to measure its performance, not only its speed but also its accuracy and stability. The purpose of this thesis has been to create a set of benchmark tests. They aim to check the physical aspects, especially mechanics, of the engine. A strategy and export functions for the test results in order to automate the testing have also been developed. The resulting tests became a beam on piles which analyses constraint stability, an overdetermined system consisting of a static door on multiple hinges, a falling object investigating the accuracy of the integrator, a box on an inclined plane for testing the friction model, a single pendulum as well as a multibody pendulum checking constraint accuracy and energy conservation, the Earth orbiting around the Sun which tests the stability of the integrator and finally a cantilever beam that is a static test of a real scenario. After the tests are performed the results are presented on an HTML-page. A prototype of a Web application is also established as well as a set of scalar tests that can be performed continuously, in order to follow trends or compare the engine's performance from time to time. This thesis was initialized by Algoryx Simulation AB which also provided the engine, AgX Dynamics, with the numerical method called SPOOK. It mainly performed well on all tests. In order to build a fully general toolbox more tests need to be added such as material interactions, scalable test with thousands of bodies, torque tests as well as more complex scenarios, for example a scissor lift and robots. The work can also be extended with more developed export functions, both to the Web and to documents. Hopefully this thesis can be seen as a complement to the earlier efforts done in creating a general set of benchmarks and automation framework for continuous integration and testing.
Fysikmotorer blir mer och mer vanliga på grund av den snabba utvecklingen och efterfrågan på simuleringar. I och med detta ökar också behovet av att testa motorerna och ett sätt att mäta prestandan, inte bara snabbheten utan också noggrannheten och stabiliteten. Syftet med detta examensarbete har varit att skapa ett set av prestandatester. De syftar till att testa de fysikaliska aspekterna av fysikmotorn, särskilt inom mekanik. En strategi och exportfunktioner för testresultaten för att automatisera testningen har också utvecklats. De resulterande testerna blev en balk på pålar som analyserar stabiliteten hos villkoren, ett överbestämt system bestående av en statisk dörr på flera gångjärn, ett fallande objekt som granskar precisionen hos integratorn, en låda på ett lutande plan som testar friktionsmodellen, en enkel pendel samt en flerkropppspendel som kontrollerar villkorsprecisionen och energikonservering, jordens bana runt solen som testar integratorns stabilitet och slutligen en utskjutande balk som är ett statiskt test av ett verkligt fall. När testerna är genomförda presenteras resultaten på en HTML-sida. En prototyp av en webb-applikation har också utvecklats samt ett set med skalära tester som kan utföras kontinuerligt för att följa upp trender och jämföra motorns prestanda över tid. Det här examensarbetet initierades av Algoryx Simulation AB som även tillhandahållit fysikmotorn, AgX Dynamics, med den numeriska metoden SPOOK. Motorn presterade överlag bra på testerna. För att bygga en allmän verktygslåda behövs fler tester så som interaktion mellan material, skalbara tester med tusentals kroppar samt mer komplexa simuleringar, t.ex. en saxlyft och robotar. Arbetet kan också utökas med mer utvecklade exportfunktioner, både mot webben och som dokument. Förhoppningsvis kan detta ses som ett komplement till de tidigare ansträgningar som gjorts för att skapa ett generellt set av prestandatester och ett automatiskt ramverk för kontinuerlig testning.
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Quadrelli, Bruno Marco. "Dynamic analysis of multi-flexible body systems with spatial beams and finite rotations." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/12052.

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Gonzalez, Hernán. "Complex dynamic scene analysis through multi-body motion segmentation : application to intelligent vehicles." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS519.

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Dans le contexte applicatif des Systèmes d'Aide à la Conduite et des Véhicules Autonomes (anglais ADAS), l'analyse de scène est un processus fondamental d'inférence duquel dépendent multiples fonctions d'asservissement et de prise de décision. Le résultat issu de l'analyse de scène permet une description fiable de l'environnement aux alentours du véhicule composée des objets statiques et dynamiques ainsi que des éléments de structure de la scène (e.g. route, espace navigable, marquage routier) et de la localisation du véhicule observateur (e.g. odométrie). Ces informations supportent les décisions et l'engagement d'actions des systèmes automatiques dans la navigation autonome et les manœuvres d'assistance à la conduite. Pour ce faire, les systèmes de perception sont conçus afin de fournir des observations de la scène redondantes et fiables. Dans le cadre de cette thèse nous nous intéressons à la segmentation d'une scène dynamique en utilisant des images issues d'un système de vision monoculaire. Dans un premier temps, une étude bibliographique des approches de l'état de l'art est présentée en contrastant les avantages et les limites des méthodes suivant des indicateurs de performance et de temps de calcul. Cela a permis la sélection d'une méthodologie récente basée vision servant de référence pour la segmentation de mouvement. Parallèlement, une étude approfondie des pré-traitements nécessaires à l'estimation du flot optique a aussi été menée. Cette première étape est clore par une implantation algorithmique pour la l'identification et la formalisation des contributions adressant les limites de l'état de l'art. Dans la deuxième étape de ce travail, nous proposons un algorithme de segmentation de mouvement basée image. Les notions et les méthodes introduites font appel à la technique du Suivi-avant-Detection (anglais Track-before-Detect) en couplage serré aux méthodes de calcul de la structure et du mouvement (anglais Structure from Motion). La méthode dénommée TbD-SfM a pour objectif la réduction de la complexité dans l'analyse de la scène intégrant un modèle de mouvement générique à 6 dégrées de liberté. Et cela en préservant la densité de caractéristiques suivies sur les mouvements observés. Plus tard, nous proposons une variante accélérée de l'algorithme TbD-SfM dénommée ETbD-SfM qui limite efficacement la complexité de la segmentation par rapport au nombre de mouvements observés dans la scène. L'ensemble des contributions a été évalué en utilisant différentes bases de données publiques reconnues dans le domaine des Transports Intelligents. Nous avons étudié les algorithmes TbD-SfM et ETbD-SfM avec le dataset Hopkins dans de conditions idéales : sans erreurs de suivi de caractéristiques et faible vitesse. Le dataset KITTI permit de vérifier la robustesse de l'approche et d'évaluer leur performance dans des scénarios incluant multiples objets en mouvement. Pour conclure, les résultats expérimentaux démontrent que les méthodes TbD-SfM et ETbD-SfM effectuent la segmentation d'une scène dynamique en utilisant un modèle à 6 dégrés de liberté obtenant une faible erreur de ré-projection tout en préservant la densité de caractéristiques essentiel au suivi de mouvement. La géométrie de la scène 3D calculée en estimant le facteur d'échelle est comparée et analysée aux trajectoires 3D des objets référencés dans la scène
In the context of Advanced Driver Assistance Systems (ADAS) and Autonomous Vehicles, scene understanding is a fundamental inference process in which several servoing and decision making functions depends on. Such a process is intended to retrieve reliable information about the vehicle's surroundings including static and dynamic objects (e.g. obstacles, pedestrians, vehicles), the scene structure (e.g. road, navigable space, lane markings) and ego-localization (e.g. odometry). All this information is essential to make crucial decisions in autonomous navigation and assistance maneuvers. To this end, single or multiple perception systems are designed to provide redundant and reliable observations of the scene. This thesis is devoted and focused on image-based multi-body motion segmentation of dynamic scenes using monocular vision systems. The conducted research starts by surveying methods of the state-of-the-art and contrasting their advantages and drawbacks in terms of performance indicators and computation time. After identifying a recent vision-based methodology, sparse optical flow required pre-processes are studied. As a concept-proof, an algorithm implementation shows, in practice, limits of the addressed approach leading to envision and formalize our contributions. Detecting and tracking objects in a classic processing chain may lead to low-performance and time-consuming solutions. Instead of segmenting moving objects and tracking them independently, a Track-before-Detect framework for a multi-body motion segmentation (namely TbD-SfM) was proposed. This method relies detection and tracking on a tightly coupled strategy intended to reduce the complexity of an existing Multi-body Structure from Motion approach. Efforts were also devoted for reducing the computational cost without introducing any kinematic model constraints and for preserving features density on observed motions. Further, an accelerated implementation variant of TbD (namely ETbD-SfM) was also proposed in order to limit the complexity increasing with respect to the number of observed motions. The proposed methods were extensively tested with different publicly available datasets such as Hopkins155 and KITTI. Hopkins dataset allows a comparison under feature-tracking ideal conditions since the dataset includes referenced optical flow. KITTI provides image sequences under real conditions in order to evaluate robustness of the method. Results on scenarios including the presence of multiple and simultaneous moving objects observed from a moving camera are analyzed and discussed. In conclusion, the obtained results show that TbD-SfM and ETbD-SfM methods can segment dynamic objects using a 6DoF motion model, achieving a low image segmentation error without increasing of computational cost and preserving the density of the feature points. Additionally, the 3D scene geometry and trajectories are provided by estimating scale on the monocular system and comparing these results to referenced object trajectories
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Peng, Tao. "Coupled Multi-body Dynamic and Vibration Analysis of Hypoid and Bevel Geared Rotor System." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1282931782.

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Dye, John. "Development and application of computational dynamic and kinematic constrained multi-body system simulations in MATLAB." Thesis, Wichita State University, 2011. http://hdl.handle.net/10057/3951.

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Historically machine and mechanism design relied heavily upon analytical and graphical means to evaluate the performance a system. With increasing complexity, these methods have been modified for use with computational tools. General purpose solvers have been created such as Adams, DADS and Dap3d to analyze different machines and mechanisms. Although these tools are available, they allow limited access to source code or utilize a language that is not readily taught in academics. This thesis will focus on the creation of a general-purpose simulation enviroment using the currently used programming language Matlab. Four simulation programs have been created allowing simulation of kinematics and dynamics for planar and spatial mechanical systems. Discussed along with the program operation is the mathematics behind normal computational dynamics. A section is dedicated to the solution and its implementation of purely kinematic methods allowing the solution of planar and spatial systems. Constraints are heavily utilized in the formation of multi-body systems and their equations and formulations are detailed. For spatial kinematic simulations, Euler parameters are discussed in detail, and the related equations needed for multibody system simulations have been provided. The mathematics of the dynamic simulations is also discussed, along with addition of non-rigid elements such as springs and dampers. Example simulations of specific systems have also been included, showing the results of interest utilizing the graphical user interfaces that have been created. Along with these examples is a simulation that includes two dimensional beam elements injected into the dynamic solver, which illustrates how multiple fields of engineering can be included in the simulations
Thesis (M.S.)--Wichita State University, College of Engineering, Dept. of Mechanical Engineering.
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Sagal, Ellen Jean 1954. "An object oriented approach to finite element analysis and multi-body dynamic analysis program designs." Thesis, The University of Arizona, 1993. http://hdl.handle.net/10150/278289.

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Procedurally-oriented computer programs used to perform finite element and multibody dynamics analyses are difficult to understand, use, and modify. A new approach, object-oriented programming, was used to develop a finite element code that is easier to apply, understand, and modify. Object-oriented code is easier to understand, as the characteristics and operations associated with a physical phenomena are grouped in a class whose structure closely parallels the modeled entity. Elements, bodies, joints, and mechanisms are modeled as classes. Program application is facilitated by a hierarchy of class structure. Manipulation of higher level body and mechanism class types direct the complicated, lower level code of element calculations. Lower level code is hidden in an object library resulting in a shorter, simpler driver program for an analysis. Modification and expansion of programs is easily accomplished through object-oriented language features such as modularization of code into classes and overloaded functions. Body and element abstract base classes provide "templates" for creation of new type classes used to develop additional analyses.
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Lantoine, Gregory. "A methodology for robust optimization of low-thrust trajectories in multi-body environments." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/37081.

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Future ambitious solar system exploration missions are likely to require ever larger propulsion capabilities and involve innovative interplanetary trajectories in order to accommodate the increasingly complex mission scenarios. Two recent advances in trajectory design can be exploited to meet those new requirements: the use of low-thrust propulsion which enables larger cumulative momentum exchange relative to chemical propulsion; and the consideration of low-energy transfers relying on full multi-body dynamics. Yet the resulting optimal control problems are hypersensitive, time-consuming and extremely difficult to tackle with current optimization tools. Therefore, the goal of the thesis is to develop a methodology that facilitates and simplifies the solution finding process of low-thrust optimization problems in multi-body environments. Emphasis is placed on robust techniques to produce good solutions for a wide range of cases despite the strong nonlinearities of the problems. The complete trajectory is broken down into different component phases, which facilitates the modeling of the effects of multiple bodies and makes the process less sensitive to the initial guess. A unified optimization framework is created to solve the resulting multi-phase optimal control problems. Interfaces to state-of-the-art solvers SNOPT and IPOPT are included. In addition, a new, robust Hybrid Differential Dynamic Programming (HDDP) algorithm is developed. HDDP is based on differential dynamic programming, a proven robust second-order technique that relies on Bellman's Principle of Optimality and successive minimization of quadratic approximations. HDDP also incorporates nonlinear mathematical programming techniques to increase efficiency, and decouples the optimization from the dynamics using first- and second-order state transition matrices. Crucial to this optimization procedure is the generation of the sensitivities with respect to the variables of the system. In the context of trajectory optimization, these derivatives are often tedious and cumbersome to estimate analytically, especially when complex multi-body dynamics are considered. To produce a solution with minimal effort, an new approach is derived that computes automatically first- and high-order derivatives via multicomplex numbers. Another important aspect of the methodology is the representation of low-thrust trajectories by different dynamical models with varying degrees of fidelity. Emphasis is given on analytical expressions to speed up the optimization process. In particular, one novelty of the framework is the derivation and implementation of analytic expressions for motion subjected to Newtonian gravitation plus an additional constant inertial force. Example applications include low-thrust asteroid tour design, multiple flyby trajectories, and planetary inter-moon transfers. In the latter case, we generate good initial guesses using dynamical systems theory to exploit the chaotic nature of these multi-body systems. The developed optimization framework is then used to generate low-energy, inter-moon trajectories with multiple resonant gravity assists.
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Khudher, Dhayaa Raissan. "Synthesis of continuous whole-body motion in hexapod robot for humanitarian demining." Thesis, Brunel University, 2018. http://bura.brunel.ac.uk/handle/2438/16508.

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In the context of control, the motion of a legged robot is very challenging compared with traditional fixed manipulator. Recently, many researches have been conducted to control the motion of legged robot with different techniques. On the other hand, manipulation tasks have been addressed in many applications. These researches solved either the mobility or the manipulation problems, but integrating both properties in one system is still not available. In this thesis, a control algorithm is presented to control both locomotion and manipulation in a six legged robot. Landmines detection process is considered as a case study of this project to accelerate the mine detection operation by performing both walking and scanning simultaneously. In order to qualify the robot to perform more tasks in addition to the walking task, the joint redundancy of the robot is exploited optimally. The tasks are arranged according to their importance to high level of priority and low level of priority. A new task priority redundancy resolution technique is developed to overcome the effect of the algorithmic singularities and the kinematic singularity. The computational aspects of the solution are also considered in view of a real-time implementation. Due to the dynamic changes in the size of the robot motion space, the algorithm has the ability to make a trade-off between the number of achieved tasks and the imposed constraints. Furthermore, an appropriate hierarchy is imposed in order to ensure an accurate decoupling between the executed tasks. The dynamic effect of the arm on the overall performance of the robot is attenuated by reducing the optimisation variables. The effectiveness of the method is evaluated on a Computer Aided Design (CAD) model and the simulations of the whole operation are conducted using MATLAB and SimMechanics.
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Esat, Volkan. "Biomechanical modelling of the whole human spine for dynamic analysis." Thesis, Loughborough University, 2006. https://dspace.lboro.ac.uk/2134/7839.

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Developing computational models of the human spine has been a hot topic in biornechanical research for a couple of decades in order to have an understanding of the behaviour of the whole spine and the individual spinal parts under various loading conditions. The objectives of this thesis are to develop a biofidefic multi-body model of the whole human spine especially for dynamic analysis of impact situations, such as frontal impact in a car crash, and to generate finite element (FE) models of the specific spinal parts to investigate causes of injury of the spinal components. As a proposed approach, the predictions of the multi-body model under dynamic impact loading conditions, such as reaction forces at lumbar motion segments, were utilised not only to have a better understanding of the gross kinetics and kinematics of the human spine, but also to constitute the boundary conditions for the finite element models of the selected spinal components. This novel approach provides a versatile, cost effective and powerful tool to analyse the behaviour of the spine under various loading conditions which in turn helps to develop a better understanding of injury mechanisms.
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Books on the topic "Multi Body Dynamic"

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Mahapatra, Abhijit, Shibendu Shekhar Roy, and Dilip Kumar Pratihar. Multi-body Dynamic Modeling of Multi-legged Robots. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2953-5.

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Center, Langley Research, ed. Dynamic and thermal response finite element models of multi-body space structural configurations. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1987.

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Dieleman, P. Study on efficient numerical time-integration methods for simulation of multi-body systems. Amsterdam: National Aerospace Laboratory, 1990.

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Rahnejat, Homer. Multi-body dynamics: Vehicles, machines, and mechanisms. London: Professional Engineering, 1998.

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Multi-body dynamics: Vehicles, machines, and mechanisms. Warrendale, Pa: Society of Automotive Engineers, Inc., 1998.

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Rothberg, Steve. Multi-body dynamics: Monitoring and simulation techniques-III. London: Professional Engineering Pub., 2004.

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Angeles, J., and A. Kecskeméthy, eds. Kinematics and Dynamics of Multi-Body Systems. Vienna: Springer Vienna, 1995. http://dx.doi.org/10.1007/978-3-7091-4362-9.

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1943-, Angeles Jorge, Kecskeméthy A, and International Centre for Mechanical Sciences., eds. Kinematics and dynamics of multi-body systems. Wien: Springer-Verlag, 1995.

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Homer, Rahnejat, Rothberg Steve, Loughborough University, and Institute of Measurement and Control., eds. Multi-body dynamics: Monitoring and simulation techniques - III. London: Professional Engineering Pub., 2004.

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International Symposium on Multi-body Dynamics: Monitoring and Simulation Techniques (2nd 2000 University of Bradford). Multi-body dynamics: Monitoring and simulation techniques - II. London: Professional Engineering Pub., 2000.

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Book chapters on the topic "Multi Body Dynamic"

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Witteveen, Wolfgang. "Body Wise Time Integration of Multi Body Dynamic Systems." In Special Topics in Structural Dynamics, Volume 6, 55–61. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-15048-2_5.

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Conti, François, and Oussama Khatib. "A Framework for Real-Time Multi-Contact Multi-Body Dynamic Simulation." In Springer Tracts in Advanced Robotics, 271–87. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-28872-7_16.

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Fisette, P., and J. C. Samin. "ROBOTRAN: Symbolic Generation of Multi-Body System Dynamic Equations." In Advanced Multibody System Dynamics, 373–78. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-017-0625-4_21.

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Ruspini, D., and O. Khatib. "A Framework for Multi-Contact Multi-Body Dynamic Simulation and Haptic Display." In Advances in Robot Kinematics, 175–86. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4120-8_19.

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Renda, Federico, Francesco Giorgio-Serchi, Frederic Boyer, Cecilia Laschi, Jorge Dias, and Lakmal Seneviratne. "A Multi-soft-body Dynamic Model for Underwater Soft Robots." In Springer Proceedings in Advanced Robotics, 143–60. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-51532-8_9.

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Hoang, Khai-Long Ho, Katja Mombaur, and Sebastian I. Wolf. "Investigating Capturability in Dynamic Human Locomotion Using Multi-body Dynamics and Optimal Control." In Modeling, Simulation and Optimization of Complex Processes - HPSC 2012, 83–93. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09063-4_7.

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Sun, Fulu, Junping Jiang, Wei Liu, Zhijie Pan, and Fuquan Zhao. "Optimization Design of Suspension Structure Based on Multi-Body Dynamic Analysis." In Lecture Notes in Electrical Engineering, 43–56. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33795-6_5.

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Mahapatra, Abhijit, Shibendu Shekhar Roy, and Dilip Kumar Pratihar. "Multi-body Inverse Dynamic Modeling and Analysis of Six-Legged Robots." In Cognitive Intelligence and Robotics, 77–135. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2953-5_4.

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Filgueira da Silva, Samuel, Jony J. Eckert, Áquila Chagas de Carvalho, Fabio Mazzariol Santiciolli, Ludmila C. A. Silva, and Franco Giuseppe Dedini. "Multi-body Dynamics Co-simulation of Planetary Gear Train for Dynamic Meshing Force Analysis." In Multibody Mechatronic Systems, 159–67. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60372-4_18.

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Unda, J., A. Avello, J. M. Jimenez, and J. García de Jalón. "COMPAMM — A Program for the Dynamic Analysis of Multi-Rigid-Body Systems." In Engineering Software IV, 983–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-662-21877-8_77.

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Conference papers on the topic "Multi Body Dynamic"

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Ebrahimi, Nader, and R. Hart. "Studies in Dynamic Analysis of Multi-body Systems." In 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-1619.

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Mancosu, Federico, Carlo Savi, Paolo Brivio, Gianclaudio Travaglio, and Isabel Ramirez. "New Dynamic Tyre Model in Multi-body Environment." In SAE 2001 World Congress. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2001. http://dx.doi.org/10.4271/2001-01-0747.

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Prabakar, R. S., and S. P. Mangalaramanan. "Flexible Multi-body Dynamic Analysis of Multi-Cylinder Engine Valve Train." In SIAT 2011. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2011. http://dx.doi.org/10.4271/2011-26-0086.

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Heise, Marius, Stefan Müller, and Gottfried Sachs. "Dynamic Modeling and Visualization of Multi-Body Flexible Systems." In AIAA Modeling and Simulation Technologies Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2004. http://dx.doi.org/10.2514/6.2004-4809.

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Takagishi, Hiroshi, and Atsushi Nagakubo. "Multi-Body Dynamic Chain System Simulation Using a Blade Tensioner." In Small Engine Technology Conference & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2006. http://dx.doi.org/10.4271/2006-32-0067.

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Patil, Mayuresh, Donghoon Lee, and Dewey Hodges. "Multi-flexible-body dynamic analysis of horizontal-axis wind turbines." In 20th 2001 ASME Wind Energy Symposium. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2001. http://dx.doi.org/10.2514/6.2001-64.

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Alexander, Todd, Chia-Shang Liu, and Vincent Monkaba. "Multi-Body Dynamic Modeling Methods and Applications for Driveline Systems." In SAE 2002 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2002. http://dx.doi.org/10.4271/2002-01-1195.

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Ulrich, Evan, Jared Grauer, Darryll Pines, James Hubbard, and Sean Humbert. "Identification of a Robotic Samara Aerodynamic/Multi-Body Dynamic Model." In AIAA Atmospheric Flight Mechanics Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2010. http://dx.doi.org/10.2514/6.2010-8233.

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Hao, Bing-fei, Hong-yan Wang, Qiang Rui, and Qin-long Wang. "Dynamic Modeling and Test Verification of Tank Multi - body System." In 2017 2nd International Conference on Materials Science, Machinery and Energy Engineering (MSMEE 2017). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/msmee-17.2017.160.

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Tran, Cao Vu, Jan Furch, and Xuan Phong Cu. "Simulation of Multi-body Dynamic Model in Mechanical Vehicle Gearbox." In 2019 International Conference on Military Technologies (ICMT). IEEE, 2019. http://dx.doi.org/10.1109/miltechs.2019.8870036.

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Reports on the topic "Multi Body Dynamic"

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TRINKLE, JEFFREY C., J. A. TZITZOURIS, and J. S. PANG. Dynamic Multi-Rigid-Body Systems with Concurrent Distributed Contacts: Theory and Examples. Office of Scientific and Technical Information (OSTI), March 2001. http://dx.doi.org/10.2172/780283.

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Bauchau, Oliver A. Multi-Body Approach to the Dynamic Analysis of Space Structures with Actuated Components. Fort Belvoir, VA: Defense Technical Information Center, January 2001. http://dx.doi.org/10.21236/ada420094.

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Shaopeng, Zhu, Hidekazu Nishimura, and Hirosi Tajima. Dynamical Analysis of Motorcycle by Using Multi-Body Dynamics Theory. Warrendale, PA: SAE International, May 2005. http://dx.doi.org/10.4271/2005-08-0389.

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Sahu, Jubaraj, Harris L. Edge, Karen R. Heavey, and Earl N. Ferry. Computational Fluid Dynamics Modeling of Multi-body Missile Aerodynamic Interference. Fort Belvoir, VA: Defense Technical Information Center, August 1998. http://dx.doi.org/10.21236/ada354107.

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Koizumi, Masahiro, Yuma Miyauchi, and Makio Kondou. Multi-Body Dynamics Simulation of Valve Train and Timing Chain Drive. Warrendale, PA: SAE International, September 2005. http://dx.doi.org/10.4271/2005-08-0645.

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Yedavalli, Rama K. Robust Stability and Control of Multi-Body Ground Vehicles with Uncertain Dynamics and Failures. Fort Belvoir, VA: Defense Technical Information Center, January 2010. http://dx.doi.org/10.21236/ada532821.

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Malmuth, Norman D., and Alexander V. Fedorov. Mathematical Fluid Dynamics of Store and Stage Separation, Multi-Body Flows and Flow Control. Fort Belvoir, VA: Defense Technical Information Center, February 2008. http://dx.doi.org/10.21236/ada482146.

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Tao, Yang, Amos Mizrach, Victor Alchanatis, Nachshon Shamir, and Tom Porter. Automated imaging broiler chicksexing for gender-specific and efficient production. United States Department of Agriculture, December 2014. http://dx.doi.org/10.32747/2014.7594391.bard.

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Extending the previous two years of research results (Mizarch, et al, 2012, Tao, 2011, 2012), the third year’s efforts in both Maryland and Israel were directed towards the engineering of the system. The activities included the robust chick handling and its conveyor system development, optical system improvement, online dynamic motion imaging of chicks, multi-image sequence optimal feather extraction and detection, and pattern recognition. Mechanical System Engineering The third model of the mechanical chick handling system with high-speed imaging system was built as shown in Fig. 1. This system has the improved chick holding cups and motion mechanisms that enable chicks to open wings through the view section. The mechanical system has achieved the speed of 4 chicks per second which exceeds the design specs of 3 chicks per second. In the center of the conveyor, a high-speed camera with UV sensitive optical system, shown in Fig.2, was installed that captures chick images at multiple frames (45 images and system selectable) when the chick passing through the view area. Through intensive discussions and efforts, the PIs of Maryland and ARO have created the protocol of joint hardware and software that uses sequential images of chick in its fall motion to capture opening wings and extract the optimal opening positions. This approached enables the reliable feather feature extraction in dynamic motion and pattern recognition. Improving of Chick Wing Deployment The mechanical system for chick conveying and especially the section that cause chicks to deploy their wings wide open under the fast video camera and the UV light was investigated along the third study year. As a natural behavior, chicks tend to deploy their wings as a mean of balancing their body when a sudden change in the vertical movement was applied. In the latest two years, this was achieved by causing the chicks to move in a free fall, in the earth gravity (g) along short vertical distance. The chicks have always tended to deploy their wing but not always in wide horizontal open situation. Such position is requested in order to get successful image under the video camera. Besides, the cells with checks bumped suddenly at the end of the free falling path. That caused the chicks legs to collapse inside the cells and the image of wing become bluer. For improving the movement and preventing the chick legs from collapsing, a slowing down mechanism was design and tested. This was done by installing of plastic block, that was printed in a predesign variable slope (Fig. 3) at the end of the path of falling cells (Fig.4). The cells are moving down in variable velocity according the block slope and achieve zero velocity at the end of the path. The slop was design in a way that the deacceleration become 0.8g instead the free fall gravity (g) without presence of the block. The tests showed better deployment and wider chick's wing opening as well as better balance along the movement. Design of additional sizes of block slops is under investigation. Slops that create accelerations of 0.7g, 0.9g, and variable accelerations are designed for improving movement path and images.
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Kelly, Luke. Humanitarian Considerations in Disarmament, Demobilisation and Reintegration (DDR). Institute of Development Studies, July 2022. http://dx.doi.org/10.19088/k4d.2022.106.

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This rapid literature review finds that disarmament, demobilisation and reintegration (DDR) raises a number of humanitarian considerations, centred on the treatment of participants and the unintended consequences of the programmes. In particular, DDR undertaken during conflicts is linked to several protection risks and is difficult to implement in a neutral, equitable and humanitarian manner. By humanitarian concerns, this report means: • Some of the functions undertaken in DDR, • Humanitarian risks to individuals in DDR programmes, • Indirect risks of conflict arising from DDR programmes; DDR is a broad and multi-faceted process involving security, humanitarian and development aspects and actors, with wide-ranging impacts. Humanitarian actors do not undertake DDR, but they may support some DDR processes, and maybe affected by DDR or its effects. According to UN guidance and the academic literature, successful DDR will consider socio-economic conditions in the community, as well as for the ex-combatants. It should be attuned to the range of needs of participants and should abide by relevant international law. The political dynamics of a conflict or post-conflict situation shape the success of DDR. It was first used in post-conflict situations, but the increasing use of DDR in ongoing conflicts creates new difficulties. The failure or partial implementation creates many humanitarian problems. This may arise from a lack of resources; competing authorities (and particularly the co-option of DDR for war aims); ongoing conflict and instability; mistakes in implementation; and socio-economic conditions unconducive to successful reintegration. Unsuccessful DDR may see partially demobilised actors remain dangerous, or may fuel new grievances around the perceived unfairness of granting support to former combatants. There is a large body of evidence on the successes and failures of DDR programmes, how they vary over time and across contexts, and guidance on how to implement DDR. Relatively little refers explicitly to humanitarian concerns, but many of the issues covered can be characterised as humanitarian. DDR has been employed in many situations since the 1980s, meaning that it is not possible to comprehensively survey the guidance or case study evidence. Instead, this review focuses on the main areas where DDR can be said to raise humanitarian concerns, with a particular focus on the problems raised by DDR in ongoing conflicts.
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Whirl Analysis of an Overhung Disk Shaft System Mounted on Non-rigid Bearings. SAE International, March 2022. http://dx.doi.org/10.4271/2022-01-0607.

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Eigenvalues of a simple rotating flexible disk-shaft system are obtained using different methods. The shaft is supported radially by non-rigid bearings, while the disk is situated at one end of the shaft. Eigenvalues from a finite element and a multi-body dynamic tool are compared against an established analytical formulation. The Campbell diagram based on natural frequencies obtained from the tools differ from the analytical values because of oversimplification in the analytical model. Later, detailed whirl analysis is performed using AVL Excite multi-body tool that includes understanding forward and reverse whirls in absolute and relative coordinate systems and their relationships. Responses to periodic force and base excitations at a constant rotational speed of the shaft are obtained and a modified Campbell diagram based on this is developed. Whirl of the center of the disk is plotted as an orbital or phase plot and its rotational direction noted. Finally, based on the above plots, forward and reverse whirl zones for the two excitation types are established.
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