Готові списки джерел за темами / Non-linear dynamic analyses

Добірка наукової літератури з теми "Non-linear dynamic analyses"

Автор: Grafiati
Опубліковано: 14 березня 2023

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями

Оберіть тип джерела:

Зміст

Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "Non-linear dynamic analyses".

Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.

Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.

Статті в журналах з теми "Non-linear dynamic analyses"

1

Sun, Huer. "Non-Linear Fracture Mechanics Analyses of Vibrating Screen Arthropleure." Key Engineering Materials 324-325 (November 2006): 767–70. http://dx.doi.org/10.4028/www.scientific.net/kem.324-325.767.

Повний текст джерела
Анотація:
The dynamic properties of the model of vibrating screen are obtained using the software Pro/ MECHANICA. The natural frequencies and mode shapes of the screen are calculated, and the distribution law of dynamic stress is found out. It shows that the structure design of the screen is reasonable. Under the working conditions designed, its dynamic strength is satisfied. This paper provides engineering estimates of non-linear fracture mechanics parameters for vibrating screen arthropleure cracks, subject to alternate stress and Vibrating. Solutions are given in the form of two different approaches.
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Magliulo, Gennaro, Giuseppe Maddaloni, and Edoardo Cosenza. "Comparison between non-linear dynamic analysis performed according to EC8 and elastic and non-linear static analyses." Engineering Structures 29, no. 11 (November 2007): 2893–900. http://dx.doi.org/10.1016/j.engstruct.2007.01.027.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Soares, D., J. Sladek, and V. Sladek. "Non-linear dynamic analyses by meshless local Petrov-Galerkin formulations." International Journal for Numerical Methods in Engineering 81, no. 13 (October 9, 2009): 1687–99. http://dx.doi.org/10.1002/nme.2756.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Figini, R., and R. Paolucci. "Integrated foundation-structure seismic assessment through non-linear dynamic analyses." Earthquake Engineering & Structural Dynamics 46, no. 3 (August 3, 2016): 349–67. http://dx.doi.org/10.1002/eqe.2790.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Reid, S. R., and J. L. Yang. "Non-linear dynamic analysis of cantilever whipping pipes." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 212, no. 3 (August 1, 1998): 133–49. http://dx.doi.org/10.1243/0954408981529367.

Повний текст джерела
Анотація:
This paper presents the results of numerical dynamic analyses of a number of pipe whip problems based on non-linear shell theory using the DYNA3D (version 6.0) finite element code. The calculations are mainly concerned with the transient deformation of the pipes during the whipping process. The main purpose of the study is to check the efficacy of a recently published theoretical elastic-plastic, hardening-softening (e-p-h-s) model for pipe whip developed by Reid et al. [1, 2]. This model is based upon beam theory but allows for the effects of ovalization of the pipe cross-section on the moment-curvature constitutive behaviour of the pipe. It is shown that the results using DYNA3D are in good agreement with both experimental data and the e-p-h-s model predictions and confirms the accuracy of the latter. While the DYNA3D study is not exhaustive, the localized shell bending deformation of whipping pipes in which ‘kinks’ are formed is reproduced with reasonable accuracy and it has permitted the effect of the strain-rate sensitivity of the yield stress of the pipe material to be examined in a preliminary manner.
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Porcu, Maria Cristina, Juan Carlos Vielma, Francesco Panu, Claudia Aguilar, and Giuseppe Curreli. "Seismic retrofit of existing buildings led by non-linear dynamic analyses." International Journal of Safety and Security Engineering 9, no. 3 (September 9, 2019): 201–12. http://dx.doi.org/10.2495/safe-v9-n3-201-212.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Greco, Annalisa, and Adolfo Santini. "Comparative study on dynamic analyses of non-classically damped linear systems." Structural Engineering and Mechanics 14, no. 6 (December 25, 2002): 679–98. http://dx.doi.org/10.12989/sem.2002.14.6.679.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Toki, Kenzo, Fusanori Miura, and Yoshiyuki Oguni. "Dynamic slope stability analyses with a non-linear finite element method." Earthquake Engineering & Structural Dynamics 13, no. 2 (March 1985): 151–71. http://dx.doi.org/10.1002/eqe.4290130203.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Peña, Fernando, and Miguel Meza. "Seismic Assessment of Bell Towers of Mexican Colonial Churches." Advanced Materials Research 133-134 (October 2010): 585–90. http://dx.doi.org/10.4028/www.scientific.net/amr.133-134.585.

Повний текст джерела
Анотація:
The seismic assessment of bell towers of churches built during the colonial period in Mexico is studied. Two representative typologies of churches of the southwest of Mexico are considered. The results of non-linear static and the non-linear dynamic analyses are compared. The results show that it is not recommended the use of non-linear static analyses; being necessary the use of full non-linear dynamic analyses.
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Capanna, Ilaria, Riccardo Cirella, Angelo Aloisio, Franco Di Fabio, and Massimo Fragiacomo. "Operational Modal Analysis and Non-Linear Dynamic Simulations of a Prototype Low-Rise Masonry Building." Buildings 11, no. 10 (October 13, 2021): 471. http://dx.doi.org/10.3390/buildings11100471.

Повний текст джерела
Анотація:
This paper focuses on the dynamic behaviour of a low-rise masonry building representing the Italian residential heritage through experimental and numerical analyses. The authors discuss an application of combined Operational Modal Analysis and Finite Element Model updating for indirect estimation of the structural parameters. Two ambient vibration tests were carried out to estimate the structure’s dynamic behaviour in operational conditions. The first experimental setup consisted of accelerometers gathered in a row along the first floor to characterize the local dynamic of the floor. Conversely, the second setup had the accelerometers placed at the building’s corners to characterize the global dynamics. The outcomes of the first setup were used to estimate the mechanical parameters of the floor, while the ones form the second were used to characterize the mechanical parameters of the masonry piers. Therefore, two finite element models were implemented: (i) a single beam with an equivalent section of the floor to grasp the local behaviour of the investigated horizontal structure; (ii) an equivalent frame model of the entire building to characterise the global dynamic behaviour. The model updating process was developed in two phases to seize local and global dynamic responses. The updated numerical model formed the basis for a sensitivity analysis using the modelling parameters. The authors chose to delve into the influence of the floor on the dynamic behaviour of low-rise masonry buildings. With this aim, non-linear dynamic analyses were carried out under different mechanical characteristics of floors, expressing the scatter for ordinary masonry buildings. The displacements’ trends along the height of the building evidenced the notable role of the floor’s stiffness in the non-linear dynamic behaviour of the building. Lastly, the authors derived the fragility curves predicting the seismic performance in failure probability under a highly severe damage state.
Стилі APA, Harvard, Vancouver, ISO та ін.
Більше джерел

Дисертації з теми "Non-linear dynamic analyses"

1

Varun. "A non-linear dynamic macroelement for soil structure interaction analyses of piles in liquefiable sites." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34718.

Повний текст джерела
Анотація:
A macroelement is developed for soil-structure interaction analyses of piles in liquefiable soils, which captures efficiently the fundamental mechanisms of saturated granular soil behavior. The mechanical model comprises a nonlinear Winkler-type model that accounts for soil resistance acting along the circumference of the pile, and a coupled viscous damper that simulates changes in radiation damping with increasing material non-linearity. Three-dimensional (3D) finite element (FE) simulations are conducted for a pile in radially homogeneous soil to identify the critical parameters governing the response. The identified parameters, i.e., hydraulic conductivity, loading rate of dynamic loading, dilation angle and liquefaction potential are then expressed in dimensionless form. Next, the macroelement parameters are calibrated as a function of the soil properties and the effective stress. A semi-empirical approach that accounts for the effects of soil-structure interaction on pore pressure generation in the vicinity of pile is used to detect the onset of liquefaction. The predictions are compared with field data obtained using blast induced liquefaction and centrifuge tests and found to be in good agreement. Finally, the macroelement formulation is extended to account for coupling in both lateral directions. FEM simulations indicate that response assuming no coupling between the two horizontal directions for biaxial loading tends to overestimate the soil resistance and fails to capture features like 'apparent negative stiffness', 'strain hardening' and 'rounded corners'.
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Hughes, Jonathan L. "Applications of Stability Analysis to Nonlinear Discrete Dynamical Systems Modeling Interactions." VCU Scholars Compass, 2015. http://scholarscompass.vcu.edu/etd/3819.

Повний текст джерела
Анотація:
Many of the phenomena studied in the natural and social sciences are governed by processes which are discrete and nonlinear in nature, while the most highly developed and commonly used mathematical models are linear and continuous. There are significant differences between the discrete and the continuous, the nonlinear and the linear cases, and the development of mathematical models which exhibit the discrete, nonlinear properties occurring in nature and society is critical to future scientific progress. This thesis presents the basic theory of discrete dynamical systems and stability analysis and explores several applications of this theory to nonlinear systems which model interactions involving economic agents and biological populations. In particular we will explore the stability properties of equilibria associated with inter-species and intergenerational population dynamics in biology and market price and agent composition dynamics in economics.
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Kahraman, Ahmet. "Non-linear dynamic analysis of geared systems /." The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487676847117141.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Latini, Corazzini Valentina. "Non-linear dynamic analysis of offshore structures." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2009. http://amslaurea.unibo.it/359/.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Wilson, Jonathan P. "Non-linear dynamics and power systems." Thesis, University of Bath, 2000. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341136.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Le, Thanh Nam. "Non-linear Dynamic analysis of corotational beam structures." Thesis, KTH, Bro- och stålbyggnad, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-36799.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Patil, Anupkumar. "Non-linear dynamical analysis of biosignals." Thesis, University of Strathclyde, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.502349.

Повний текст джерела
Анотація:
Biosignals are physiological signals that are recorded from various parts of the body. Some of the major biosignals are electromyograms (EMG), electroencephalograms (EEG) and electrocardiograms (ECG). These signals are of great clinical and diagnostic importance, and are analysed to understand their behaviour and to extract maximum information from them. However, they tend to be random and unpredictable in nature (non-linear). Conventional linear methods of analysis are insufficient. Hence, analysis using non-linear and dynamical system theory, chaos theory and fractal dimensions, is proving to be very beneficial. In this project, EGG signals are of interest. Changes in the normal rhythm of a human heart may result in different cardiac arrhythmias, which may be fatal or cause irreparable damage to the heart when sustained over long periods of time. Hence the ability to identify arrhythmias from EGG recordings is of importance for clinical diagnosis and treatment and also for understanding the electrophysiological mechanism of arrhythmias.
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Richardson, Thomas Stuart. "Continuation methods applied to non linear flight dynamics and control." Thesis, University of Bristol, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268783.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Cheng, Gang. "Analyzing and Solving Non-Linear Stochastic Dynamic Models on Non-Periodic Discrete Time Domains." TopSCHOLAR®, 2013. http://digitalcommons.wku.edu/theses/1236.

Повний текст джерела
Анотація:
Stochastic dynamic programming is a recursive method for solving sequential or multistage decision problems. It helps economists and mathematicians construct and solve a huge variety of sequential decision making problems in stochastic cases. Research on stochastic dynamic programming is important and meaningful because stochastic dynamic programming reflects the behavior of the decision maker without risk aversion; i.e., decision making under uncertainty. In the solution process, it is extremely difficult to represent the existing or future state precisely since uncertainty is a state of having limited knowledge. Indeed, compared to the deterministic case, which is decision making under certainty, the stochastic case is more realistic and gives more accurate results because the majority of problems in reality inevitably have many unknown parameters. In addition, time scale calculus theory is applicable to any field in which a dynamic process can be described with discrete or continuous models. Many stochastic dynamic models are discrete or continuous, so the results of time scale calculus are directly applicable to them as well. The aim of this thesis is to introduce a general form of a stochastic dynamic sequence problem on complex discrete time domains and to find the optimal sequence which maximizes the sequence problem.
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Suliman, Ridhwaan. "A quadratic non-linear elasticity formulation for the dynamic behaviour of fluid-loaded structures." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/277824.

Повний текст джерела
Анотація:
This work details the development and implementation of a numerical model capable of solving strongly-coupled fluid-structure interaction problems involving long thin structures, which are common multi-physics problems encountered in many applications. In most fluid-structure interaction problems the deformation of the slender elastic bodies is significant and cannot be described by a purely linear analysis. We present a new formulation to model these larger displacements. By extending the standard modal decomposition technique for linear structural analysis, the governing equations and boundary conditions are updated to account for the leading-order non-linear terms and a new modal formulation with quadratic modes is derived. The quadratic modal approach is tested on standard benchmark problems of increasing complexity and compared with analytical and full non-linear numerical solutions. Two computational fluid-structure interaction approaches are then implemented in a partitioned manner: a finite volume method for discretisation of both the fluid and solid domains and the quadratic modal formulation for the structure coupled with a finite volume fluid solver. Strong-coupling is achieved by means of a fixed-point solver with dynamic relaxation. The fluid-structure interaction approaches are validated and compared on benchmark problems of increasing complexity and strength of coupling between the fluid and solid domains. Fluid-structure interaction systems may become unstable due to the interaction between the fluid-induced pressure and structural rigidity. A thorough stability analysis of finite elastic plates in uniform flow is conducted by varying the structural length and flow velocity showing that these are critical parameters. Validation of the results with those from analytical methods is done. An analysis of the dynamic interactions between multiple finite plates in various configurations is also conducted.
Стилі APA, Harvard, Vancouver, ISO та ін.
Більше джерел

Книги з теми "Non-linear dynamic analyses"

1

Singh, Rajendra. Non-linear dynamic analysis of geared systems. [Columbus, Ohio]: The Ohio State University, Dept. of Mechanical Engineering, 1990.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Singh, Rajendra. Non-linear dynamic analysis of geared systems. [Columbus, Ohio]: The Ohio State University, Dept. of Mechanical Engineering, 1990.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Rajendra, Singh. Non-linear dynamic analysis of geared systems. Cleveland, Ohio: Lewis Research Center, 1990.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
4

J, Shaker Francis, Fertis Demeter G, and Lewis Research Center, eds. Dynamic analysis of space-related linear and non-linear structures. Cleveland, Ohio: NASA Lewis Research Facility, 1990.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
5

J, Shaker Francis, Fertis Demeter G, and Lewis Research Center, eds. Dynamic analysis of space-related linear and non-linear structures. Cleveland, Ohio: NASA Lewis Research Facility, 1990.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Lakis, A. A. Non-linear dynamic analysis of anisotropic cylindrical shells. Montréal, Québec: École polytechnique de Montréal, Dept. of Mechanical Engineering, Campus de lʼUniversité de Montréal, 1995.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Bogdanovich, Alexander. Non-linear dynamic problems for composite cylindrical shells. London: Elsevier Applied Science, 1993.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Non-linear time series: A dynamical system approach. Oxford: Clarendon, 1990.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Tong, Howell. Non-linear time series: A dynamical system approach. Oxford: Clarendon Press, 1990.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Tong, Howell. Non-linear time series: A dynamical system approach. Oxford: Clarendon Press, 1993.

Знайти повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
Більше джерел

Частини книг з теми "Non-linear dynamic analyses"

1

Tanimoto, Jun. "Dynamics of Non-Linear Systems." In Mathematical Analysis of Environmental System, 105–23. Tokyo: Springer Japan, 2013. http://dx.doi.org/10.1007/978-4-431-54622-1_4.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Kanninen, M. F., S. J. Hudak, H. R. Couque, R. J. Dexter, and P. E. O’donoghue. "Viscoplastic-dynamic crack propagation: Experimental and analysis research for crack arrest applications in engineering structures." In Non-Linear Fracture, 239–60. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-017-2444-9_16.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Crescitelli, S. "Non-linear Process Analysis." In Nonlinear Dynamics and Control in Process Engineering — Recent Advances, 105–27. Milano: Springer Milan, 2002. http://dx.doi.org/10.1007/978-88-470-2208-9_7.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Principe, Jose C., Ludong Wang, and Jyh-Ming Kuo. "Non-Linear Dynamic Modelling with Neural Networks." In Signal Analysis and Prediction, 275–90. Boston, MA: Birkhäuser Boston, 1998. http://dx.doi.org/10.1007/978-1-4612-1768-8_20.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Aubry, D., and H. Modaressi. "Dynamic Analysis of Saturated Non Linear Media." In Numerical Methods and Constitutive Modelling in Geomechanics, 211–35. Vienna: Springer Vienna, 1990. http://dx.doi.org/10.1007/978-3-7091-2832-9_3.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Adhikari, Sondipon. "Linear Systems with General Non-Viscous Damping." In Structural Dynamic Analysis with Generalized Damping Models, 187–236. Hoboken, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118572023.ch5.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Ondra, Vaclav, Ibrahim A. Sever, and Christoph W. Schwingshackl. "Non-linear System Identification Using the Hilbert-Huang Transform and Complex Non-linear Modal Analysis." In Nonlinear Dynamics, Volume 1, 77–86. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-54404-5_8.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Behrens, Doris A., and Reinhard Neck. "Similarities between Solutions of Discrete-Time (Non-)Linear-Quadratic Games." In Optimization, Dynamics, and Economic Analysis, 64–75. Heidelberg: Physica-Verlag HD, 2000. http://dx.doi.org/10.1007/978-3-642-57684-3_6.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Cenatiempo, Serena. "Analysis of Fluctuations Around Non-linear Effective Dynamics." In Advances in Quantum Mechanics, 99–119. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58904-6_6.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Amendola, Alessandra, and Giuseppe Storti. "Non-linear Dynamics in the Industrial Production Index." In Studies in Classification, Data Analysis, and Knowledge Organization, 147–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-642-17111-6_12.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.

Тези доповідей конференцій з теми "Non-linear dynamic analyses"

1

JIANG, W., W. JONES, K. WU, and T. WANG. "Non-linear and linear, static and dynamic analyses of helical springs." In 30th Structures, Structural Dynamics and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1989. http://dx.doi.org/10.2514/6.1989-1200.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Kaplan, Jason A., Roger L. Fittro, Alexandrina Untaroiu, and Houston G. Wood. "Non-Linear Time-Transient Rotor Dynamic Analyses of Geared Systems." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-43481.

Повний текст джерела
Анотація:
The ability to accurately predict the response of rotating machinery to external forces and to assess system-level stability for different modes is crucial from a reliability and preventive maintenance perspective. Geared systems, in particular, contain many complexities, which may lead to instability and even chaotic vibration behavior. No methods for determining the effects of the dynamic meshing forces on the vibrations of complete shaft/bearing systems have been proposed in the literature. Several time-transient and steady-state models for analyzing gear forces and deflections have been proposed, but they focus primarily on the dynamics of the gearbox itself and neglect vibration transmission through the remainder of the drive-train. Models that do incorporate other components of the drive-train propose simplified lumped-parameter models for the shafts and bearings. Recent models have used the finite element method to couple the lateral, torsional, and axial degrees-of-freedom of geared shaft systems to the forces and moments exchanged between the gears via stiffness matrices. Other models in literature capture the backlash non-linearity and the state-varying mesh stiffness and observe the time-transient response of the gearbox and simplified shaft/bearing structure. A finite element formulation of complete geared systems, which couples the axial, lateral, and torsional degrees-of-freedom, is developed in which the shaft is modeled with Timoshenko beam elements and captures the forces and moments due to gyroscopic effects, and rotational accelerations due to start-up. It includes the capability of modeling non-linear contact loss due to backlash clearance and parametric excitations resulting from the state-varying mesh stiffness and solves the time-transient state equations for the displacements and velocities of the shafts using the direct Runge-Kutta method.
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Ahn, Kwanghyun, Minsung Chun, Sangmin Han, Kibok Jang, and Yongsuk Suh. "Dropped Object Analysis Using Non-Linear Dynamic FE Analysis." In ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/omae2014-23333.

Повний текст джерела
Анотація:
For the last few decades, necessity of direct non-linear FE analysis has been increasing for the accidental events at the vessel/offshore structures. One of major areas for the accidental design, dropped object analysis using non-linear analysis is indispensable for the verification of structural safety at the design process. This paper is concerned with the methodology, conditions, and design consideration of dropped object analysis using dynamic FE analysis. By comparing the results from direct FE analyses to those from simplified energy method described in DNV-RP-C204, necessities and advantages of direct non-linear analysis can be verified. In this paper, the effect of analysis condition is investigated using parametric study. The results are influenced by the application of failure criteria according to the rule requirements, application of material properties, dropping position, condition of the object, and so on. This study can suggest appropriate determination of the methodology and condition for the dropped object analysis using direct FE analysis.
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Mulas, Maria Gabriella, Paolo Martinelli, and Susanna Capriotti. "NON-LINEAR DYNAMIC ANALYSES OF AN RC FRAME BUILDING COLLAPSED DURING L’AQUILA 2009 EARTHQUAKE." In 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering Methods in Structural Dynamics and Earthquake Engineering. Athens: Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece, 2017. http://dx.doi.org/10.7712/120117.5450.18063.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Linhard, Johannes, Andreas Hartung, Stefan Schwarz, Hans-Peter Hackenberg, and Mateusz Sienko. "The Impact of Excitation and Mode Shape on Non-Linear Blade Vibrations." In ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/gt2020-14670.

Повний текст джерела
Анотація:
Abstract Recently, reliable non-linear dynamic solvers for the analysis of frictionally coupled turbine blades have been developed which are based on either Higher Harmonic Balance Method or Non-linear Modal Analysis. One of these tools is OrAgL which was developed by Institute of Dynamics of Vibrations (Leibniz University of Hannover) and Institute of Aircraft Propulsion Systems (University of Stuttgart). In [1], the rig and engine validation results of with OrAgL performed forced response analyses have been published: The main aim of this paper was the comparison of non-linear numerical predictions (amplitude, frequencies) with the blade-to-blade averaged values of optical measurement results obtained using MTU’s non-contact vibration measurement system for shrouded turbine blades (BSSM-T). Detailed analyses and validations performed over the last two years showed several novel aspects of validation such as the comparison with strain gauge measurements. Moreover, a better understanding of the impact of excitation (magnitude and load distribution over the airfoil) as well as of the impact of the mode shape on the formation of saturation regimes is now possible. The results obtained from the analyses of real turbine blades are presented in this work.
Стилі APA, Harvard, Vancouver, ISO та ін.
6

Goulet, Christine A., Jennie Watson-Lamprey, Jack Baker, Curt Haselton, and Nico Luco. "Assessment of Ground Motion Selection and Modification (GMSM) Methods for Non-Linear Dynamic Analyses of Structures." In Geotechnical Earthquake Engineering and Soil Dynamics Congress IV. Reston, VA: American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/40975(318)3.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
7

Bertolesi, Elisa, Antonio Del Grosso, Gabriele Milani, Fabio Minghini, and Antonio Tralli. "3D FE PUSHOVER AND NON-LINEAR DYNAMIC ANALYSES OF A MASONRY CHIMNEY BEFORE AND AFTER SHORTENING." In 5th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering Methods in Structural Dynamics and Earthquake Engineering. Athens: Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece, 2015. http://dx.doi.org/10.7712/120115.3529.722.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
8

Pollayi, Hemaraju, and Dineshkumar Harursampath. "Fully Comprehensive Geometrically Non-Linear Analysis of Anisotropic Composite Beam Systems." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-35355.

Повний текст джерела
Анотація:
This paper describes a comprehensive approach to analyse anisotropic composite beams. Based on geometrically non-linear elasticity theory, the non-linear 3-D beam problem splits into either a linear or non-linear 2-D analysis of the beam cross-section and a non-linear 1-D analysis along the beam reference line. Usually cross-sectional analyses are linear, but there are a few exceptions, like the “trapeze effect” and “Brazier effect”. The two sub-tasks of this work (viz. non-linear analysis of the beam cross-section and non-linear beam analysis) are to be accomplished on a single platform using object-oriented framework. First, we perform a non-linear numerical cross-sectional analysis, based on the Variational-Asymptotic Method (VAM). It is capable of treating cross-sections of arbitrary geometry and generally anisotropic material. Second, we formulate the comprehensively non-linear 1-D governing equations along the beam reference line using the mixed variational method and the expressions for non-linear stiffness matrix. The dynamic response of non-linear, flexible multibody systems is thus simulated within the framework of energy-preserving and energy-decaying time integration schemes that provide unconditional stability for non-linear systems. Finally, local 3-D stress, strain and displacement fields for representative sections in the component beams are recovered, based on the stress resultants from a 1-D global beam analysis. Results from this analysis are compared with those available in the literature, both theoretical and experimental, and focus on the behavior of multi-body systems involving members with elastic couplings.
Стилі APA, Harvard, Vancouver, ISO та ін.
9

Larsen, Carl M., Elizabeth Passano, Gro Sagli Baarholm, and Kamran Koushan. "Non-Linear Time Domain Analysis of Vortex Induced Vibrations for Free Spanning Pipelines." In ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2004. http://dx.doi.org/10.1115/omae2004-51404.

Повний текст джерела
Анотація:
Pipelines from offshore petroleum fields must frequently pass over areas with uneven seafloor. In such cases the pipeline may have free spans when crossing depressions. Hence, if dynamic loads can occur, the free span may oscillate and time varying stresses may give unacceptable fatigue damage. A major source for dynamic stresses in deep water free span pipelines is vortex induced vibrations (VIV) caused by current. Two alternative strategies for calculation of VIV are seen today. Practical engineering is still based on empirical models, while use of computational fluid dynamics (CFD) is considered immature mainly because of the needed computing resources. Most empirical models are based on frequency domain dynamic solutions and linear structural models, cf. Larsen (2000). The reason for this is simply that hydrodynamic coefficients as needed in a VIV analysis are available as functions of frequency, and therefore not directly applicable in a transient time domain simulation. A free span pipeline has, however, important nonlinearities that should be taken into consideration. Both tension variation and pipe-seafloor interaction at the span shoulders will contribute to nonlinear behaviour, which means that most empirical models will have significant limitations when dealing with the free span case. The need for non-linear time domain methods is therefore obvious. This paper describes a new approach for VIV analysis of free span pipelines where both linear frequency and non-linear time domain analyses are employed. The first step is to carry out a conventional VIV analysis that will determine response frequency and hydrodynamic coefficients by use of a linear response model. This result is then used in a time domain model that can handle non-linear boundary conditions at the span shoulders. This approach is valid as long as the response amplitudes at the main part of the span are the same for both analysis methods. The significance of the new method is that displacements, and hence also stresses, in the pipe at the shoulders will be far better described by the non-linear method than what is possible from linear theory. Since fatigue damage in most cases is larger at the shoulder than within the mid section of the span, the new approach represents an important step forward for free span pipeline analysis.
Стилі APA, Harvard, Vancouver, ISO та ін.
10

Venkataramana, K., V. Bhasin, K. K. Vaze, and H. S. Kushwaha. "B2' Stress Indices for Elbows Using Non-Linear Finite Element Analysis." In ASME/JSME 2004 Pressure Vessels and Piping Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/pvp2004-2689.

Повний текст джерела
Анотація:
Nuclear power plants are designed to withstand earthquake loads without severe damage under service level D conditions. Under earthquake induced reversing dynamic load, nuclear power plant components may undergo plastic deformation. Plastic deformation in class I nuclear power plant piping systems is limited by Equation (9) of ASME Boiler & Pressure Vessel Code [14], Section III, NB-3652. In the year 2000, the ASME B&PV Code was revised to accommodate reversing dynamic loading in which the failure mode is fatigue ratcheting, instead of plastic collapse. This modified equation [16] contains B2′ index, which is given as a fraction of B2 index where, B2 is defined for monotonic loading [17]. In this study a new definition is proposed for calculating B2′ stress index which is given by B2′ = MCLcyclicRange,straightpipe/MCLcyclicRange,component, where MClcyclicRange is the range of collapse moment. Incremental elastic-plastic nonlinear finite element analyses are performed considering both material and geometric nonlinearities. Kinematic hardening, isotropic hardening and elastic-perfectly plastic material models have been used to model the material behavior during plastic deformation. Load deflection curves are obtained and from these curves collapse loads for monotonic and cyclic loading are determined. B2 and B2′ stress indices are computed for elbows using the proposed equation. The computed stress indices are compared with ASME Code values.
Стилі APA, Harvard, Vancouver, ISO та ін.

Звіти організацій з теми "Non-linear dynamic analyses"

1

Perdigão, Rui A. P. New Horizons of Predictability in Complex Dynamical Systems: From Fundamental Physics to Climate and Society. Meteoceanics, October 2021. http://dx.doi.org/10.46337/211021.

Повний текст джерела
Анотація:
Discerning the dynamics of complex systems in a mathematically rigorous and physically consistent manner is as fascinating as intimidating of a challenge, stirring deeply and intrinsically with the most fundamental Physics, while at the same time percolating through the deepest meanders of quotidian life. The socio-natural coevolution in climate dynamics is an example of that, exhibiting a striking articulation between governing principles and free will, in a stochastic-dynamic resonance that goes way beyond a reductionist dichotomy between cosmos and chaos. Subjacent to the conceptual and operational interdisciplinarity of that challenge, lies the simple formal elegance of a lingua franca for communication with Nature. This emerges from the innermost mathematical core of the Physics of Coevolutionary Complex Systems, articulating the wealth of insights and flavours from frontier natural, social and technical sciences in a coherent, integrated manner. Communicating thus with Nature, we equip ourselves with formal tools to better appreciate and discern complexity, by deciphering a synergistic codex underlying its emergence and dynamics. Thereby opening new pathways to see the “invisible” and predict the “unpredictable” – including relative to emergent non-recurrent phenomena such as irreversible transformations and extreme geophysical events in a changing climate. Frontier advances will be shared pertaining a dynamic that translates not only the formal, aesthetical and functional beauty of the Physics of Coevolutionary Complex Systems, but also enables and capacitates the analysis, modelling and decision support in crucial matters for the environment and society. By taking our emerging Physics in an optic of operational empowerment, some of our pioneering advances will be addressed such as the intelligence system Earth System Dynamic Intelligence and the Meteoceanics QITES Constellation, at the interface between frontier non-linear dynamics and emerging quantum technologies, to take the pulse of our planet, including in the detection and early warning of extreme geophysical events from Space.
Стилі APA, Harvard, Vancouver, ISO та ін.
2

Centurioni, Luca, Pearn P. Niiler, and Dong-Kyu Lee. Non Linear Internal Wave Dynamics in the South China Sea - Analysis of NCOM Surface Circulation and Sea Level. Fort Belvoir, VA: Defense Technical Information Center, May 2009. http://dx.doi.org/10.21236/ada502421.

Повний текст джерела
Стилі APA, Harvard, Vancouver, ISO та ін.
3

Pirateque-Niño, Javier Eliecer, Daniela Rodríguez-Novoa, and José Hernán Piñeros-Gordo. Does monetary policy affect the net interest margin of credit institutions? Evidence from Colombia. Banco de la República, April 2022. http://dx.doi.org/10.32468/be.1197.

Повний текст джерела
Анотація:
This paper analyzes empirically the relationship between monetary policy interventions and the net interest margin of Colombian credit institutions for the 2003 – 2019 period. Considering the endogeneity problem that arises when analysing this relationship, we calculate a series of monetary policy shocks as the residuals of regressing the monetary policy rate on a set of quantifiable variables that the Central Bank of Colombia’s Board of Directors had at each of its monetary policy meetings. Thereafter, we conduct a panel regression analysis in which we relate these shocks, and a set of macroeconomic and bank-specific variables to the net interest margin. Through a non-linear approach, we find a significant quadratic relationship, which reflects that once the endogeneity problem is overcome, the net interest margin increases to policy shocks. The net interest margin increases to positive policy shocks due to the different dynamics of deposits and loans, and increases to negative policy shocks given the higher sensitivity of banks’ funding costs compared to the one of interest income.
Стилі APA, Harvard, Vancouver, ISO та ін.
4

Castellano, Mike J., Abraham G. Shaviv, Raphael Linker, and Matt Liebman. Improving nitrogen availability indicators by emphasizing correlations between gross nitrogen mineralization and the quality and quantity of labile soil organic matter fractions. United States Department of Agriculture, January 2012. http://dx.doi.org/10.32747/2012.7597926.bard.

Повний текст джерела
Анотація:
A major goal in Israeli and U.S. agroecosystems is to maximize nitrogen availability to crops while minimizing nitrogen losses to air and water resources. This goal has presented a significant challenge to global agronomists and scientists because crops require large inputs of nitrogen (N) fertilizer to maximize yield, but N fertilizers are easily lost to surrounding ecosystems where they contribute to water pollution and greenhouse gas concentrations. Determination of the optimum N fertilizer input is complex because the amount of N produced from soil organic matter varies with time, space and management. Indicators of soil N availability may help to guide requirements for N fertilizer inputs and are increasingly viewed as indicators of soil health To address these challenges and improve N availability indicators, project 4550 “Improving nitrogen availability indicators by emphasizing correlations between gross nitrogen mineralization and the quality and quantity of labile organic matter fractions” addressed the following objectives: Link the quantity and quality of labile soil organic matter fractions to indicators of soil fertility and environmental quality including: i) laboratory potential net N mineralization ii) in situ gross N mineralization iii) in situ N accumulation on ion exchange resins iv) crop uptake of N from mineralized soil organic matter sources (non-fertilizer N), and v) soil nitrate pool size. Evaluate and compare the potential for hot water extractable organic matter (HWEOM) and particulate organic matter quantity and quality to characterize soil N dynamics in biophysically variable Israeli and U.S. agroecosystems that are managed with different N fertility sources. Ultimately, we sought to determine if nitrogen availability indicators are the same for i) gross vs. potential net N mineralization processes, ii) diverse agroecosystems (Israel vs. US) and, iii) management strategies (organic vs. inorganic N fertility sources). Nitrogen availability indicators significantly differed for gross vs. potential N mineralization processes. These results highlight that different mechanisms control each process. Although most research on N availability indicators focuses on potential net N mineralization, new research highlights that gross N mineralization may better reflect plant N availability. Results from this project identify the use of ion exchange resin (IERs) beads as a potential technical advance to improve N mineralization assays and predictors of N availability. The IERs mimic the rhizosphere by protecting mineralized N from loss and immobilization. As a result, the IERs may save time and money by providing a measurement of N mineralization that is more similar to the costly and time consuming measurement of gross N mineralization. In further search of more accurate and cost-effective predictors of N dynamics, Excitation- Emission Matrix (EEM) spectroscopy analysis of HWEOM solution has the potential to provide reliable indicators for changes in HWEOM over time. These results demonstrated that conventional methods of labile soil organic matter quantity (HWEOM) coupled with new analyses (EEM) may be used to obtain more detailed information about N dynamics. Across Israeli and US soils with organic and inorganic based N fertility sources, multiple linear regression models were developed to predict gross and potential N mineralization. The use of N availability indicators is increasing as they are incorporated into soil health assessments and agroecosystem models that guide N inputs. Results from this project suggest that some soil variables can universally predict these important ecosystem process across diverse soils, climate and agronomic management. BARD Report - Project4550 Page 2 of 249
Стилі APA, Harvard, Vancouver, ISO та ін.
5

Engel, Bernard, Yael Edan, James Simon, Hanoch Pasternak, and Shimon Edelman. Neural Networks for Quality Sorting of Agricultural Produce. United States Department of Agriculture, July 1996. http://dx.doi.org/10.32747/1996.7613033.bard.

Повний текст джерела
Анотація:
The objectives of this project were to develop procedures and models, based on neural networks, for quality sorting of agricultural produce. Two research teams, one in Purdue University and the other in Israel, coordinated their research efforts on different aspects of each objective utilizing both melons and tomatoes as case studies. At Purdue: An expert system was developed to measure variances in human grading. Data were acquired from eight sensors: vision, two firmness sensors (destructive and nondestructive), chlorophyll from fluorescence, color sensor, electronic sniffer for odor detection, refractometer and a scale (mass). Data were analyzed and provided input for five classification models. Chlorophyll from fluorescence was found to give the best estimation for ripeness stage while the combination of machine vision and firmness from impact performed best for quality sorting. A new algorithm was developed to estimate and minimize training size for supervised classification. A new criteria was established to choose a training set such that a recurrent auto-associative memory neural network is stabilized. Moreover, this method provides for rapid and accurate updating of the classifier over growing seasons, production environments and cultivars. Different classification approaches (parametric and non-parametric) for grading were examined. Statistical methods were found to be as accurate as neural networks in grading. Classification models by voting did not enhance the classification significantly. A hybrid model that incorporated heuristic rules and either a numerical classifier or neural network was found to be superior in classification accuracy with half the required processing of solely the numerical classifier or neural network. In Israel: A multi-sensing approach utilizing non-destructive sensors was developed. Shape, color, stem identification, surface defects and bruises were measured using a color image processing system. Flavor parameters (sugar, acidity, volatiles) and ripeness were measured using a near-infrared system and an electronic sniffer. Mechanical properties were measured using three sensors: drop impact, resonance frequency and cyclic deformation. Classification algorithms for quality sorting of fruit based on multi-sensory data were developed and implemented. The algorithms included a dynamic artificial neural network, a back propagation neural network and multiple linear regression. Results indicated that classification based on multiple sensors may be applied in real-time sorting and can improve overall classification. Advanced image processing algorithms were developed for shape determination, bruise and stem identification and general color and color homogeneity. An unsupervised method was developed to extract necessary vision features. The primary advantage of the algorithms developed is their ability to learn to determine the visual quality of almost any fruit or vegetable with no need for specific modification and no a-priori knowledge. Moreover, since there is no assumption as to the type of blemish to be characterized, the algorithm is capable of distinguishing between stems and bruises. This enables sorting of fruit without knowing the fruits' orientation. A new algorithm for on-line clustering of data was developed. The algorithm's adaptability is designed to overcome some of the difficulties encountered when incrementally clustering sparse data and preserves information even with memory constraints. Large quantities of data (many images) of high dimensionality (due to multiple sensors) and new information arriving incrementally (a function of the temporal dynamics of any natural process) can now be processed. Furhermore, since the learning is done on-line, it can be implemented in real-time. The methodology developed was tested to determine external quality of tomatoes based on visual information. An improved model for color sorting which is stable and does not require recalibration for each season was developed for color determination. Excellent classification results were obtained for both color and firmness classification. Results indicted that maturity classification can be obtained using a drop-impact and a vision sensor in order to predict the storability and marketing of harvested fruits. In conclusion: We have been able to define quantitatively the critical parameters in the quality sorting and grading of both fresh market cantaloupes and tomatoes. We have been able to accomplish this using nondestructive measurements and in a manner consistent with expert human grading and in accordance with market acceptance. This research constructed and used large databases of both commodities, for comparative evaluation and optimization of expert system, statistical and/or neural network models. The models developed in this research were successfully tested, and should be applicable to a wide range of other fruits and vegetables. These findings are valuable for the development of on-line grading and sorting of agricultural produce through the incorporation of multiple measurement inputs that rapidly define quality in an automated manner, and in a manner consistent with the human graders and inspectors.
Стилі APA, Harvard, Vancouver, ISO та ін.
Також вас можуть зацікавити розширені добірки на тему "Non-linear dynamic analyses" для конкретних типів джерел:
Статті в журналах Дисертації Книги
Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!

До бібліографії