Дисертації з теми "Component-mode synthesi"
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Soucy, Yvan. "Test-based hybrid component mode synthesis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0014/NQ37056.pdf.
Повний текст джерелаTroeng, Tor. "Frequency Response Analysis using Component Mode Synthesis." Thesis, Umeå universitet, Institutionen för matematik och matematisk statistik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-37809.
Повний текст джерелаBlackwood, Gary H. (Gary Howard). "Experimental component mode synthesis of structures with joint freeplay." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/37486.
Повний текст джерелаPetersen, Lynn James. "Mast-antenna survivability : structural dynamic design analysis by component mode synthesis." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA280669.
Повний текст джерелаZoet, Petrus Gosse. "Component mode synthesis for ship structures : investigation into an alternative approach." Thesis, University of Strathclyde, 2013. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=24881.
Повний текст джерелаAbdallah, Ayman Ahmed. "Dynamic substructuring by the boundary flexibility vector method of component mode synthesis." Case Western Reserve University School of Graduate Studies / OhioLINK, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=case1054567783.
Повний текст джерелаRamani, Anand. "Two-step Component Mode Synthesis with convergence for the eigensolution of large-degree-of-freedom systems." Diss., Virginia Tech, 1996. http://hdl.handle.net/10919/39162.
Повний текст джерелаBeck, Joseph A. "Stochastic Mistuning Simulation of Integrally Bladed Rotors using Nominal and Non-Nominal Component Mode Synthesis Methods." Wright State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=wright1278600105.
Повний текст джерелаCovi, Patrick. "Multi-hazard analysis of steel structures subjected to fire following earthquake." Doctoral thesis, Università degli studi di Trento, 2021. http://hdl.handle.net/11572/313383.
Повний текст джерелаZhou, Changwei. "Approche couplée propagative et modale pour l'analyse multi-échelle des structures périodiques." Thesis, Ecully, Ecole centrale de Lyon, 2014. http://www.theses.fr/2014ECDL0040/document.
Повний текст джерелаStructural dynamics can be described in terms of structural modes as well as elastic wave motions. The mode-based methods are widely applied in mechanical engineering and numerous model order reduction (MOR) techniques have been developed. When it comes to the study of periodic structures, wave description is mostly adopted where periodicity is fully exploited based on the Bloch theory. For complex periodic structures, several MOR techniques conducted on wave basis have been proposed in the literature. In this work, a wave and modal coupled approach is developed to study the wave propagation in periodic structures. The approach begins with the modal description of a unit cell (mesoscopic scale) using Component Mode Synthesis (CMS). Subsequently, the wave-based method -Wave Finite Element Method (WFEM) is applied to the structure (macroscopic scale). The method is referred as “CWFEM” for Condensed Wave Finite Element Method. It combines the advantages of CMS and WFEM. CMS enables to analyse the local behaviour of the unit cell using a reduced modal basis. On the other hand, WFEM exploits fully the periodic propriety of the structure and extracts directly the propagation parameters. Thus the analysis of the wave propagation in the macroscopic scale waveguides can be carried out considering the mesoscopic scale behaviour. The effectiveness of CWFEM is illustrated via several one-dimensional (1D) periodic structures and two-dimensional (2D) periodic structures. The criterion of the optimal reduction to ensure the convergence is discussed. Typical wave propagation characteristics in periodic structures are identified, such as pass bands, stop bands, wave beaming effects, dispersion relation, band structure and slowness surfaces...Their proprieties can be applied as vibroacoustics barriers, wave filters. CWFEM is subsequently applied to study wave propagation characteristics in perforated plates and stiffened plate. A homogenization method to find the equivalent model of perforated plate is proposed. The high frequency behaviours such as wave beaming effect are also predicted by CWFEM. Three plate models with different perforations are studied. Experimental validation is conducted on two plates. For the stiffened plate, the influence of internal modes on propagation is discussed. The modal density in the mid- and high- frequency range is estimated for a finite stiffened plate, where good correlation is obtained compared to the mode count from modal analysis
Lindberg, Eskil. "Vehicle Disc Brake Roughness Noise : Experimental Study of the Interior Noise andVibro-Acoustic Modelling of Suspension Systems." Licentiate thesis, KTH, MWL Strukturakustik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-39554.
Повний текст джерелаQC 20110913
Joannin, Colas. "Réduction de modèle par sous-structuration et modes non-linéaires : Application à la dynamique des roues aubagées." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEC014/document.
Повний текст джерелаMistuning of bladed disks has been a key topic of research for the aeronautics industry. To get accreditation for their engines, manufacturers must comply with evermore stringent requirements, and thus constantly seek for better simulation tools. Even though the phenomenon is well understood nowadays for linear systems, nonlinearities are still seldom taken into account when dealing with the mistuning of industrial structures, partly due to the lack of a dedicated method to tackle such a complex problematic. The main objective of this work is to develop a novel method allowing to compute efficiently the forced response of a mistuned bladed disk, while taking into account the impact of nonlinearities on the vibrations at a macroscopic scale. The method derived relies on a substructuring approach, and uses the concept of nonlinear complex modes to capture the nonlinearities in the reduction basis of each substructure. In the frequency domain, the substructures take the form of nonlinear superelements, which once assembled lead to the reduced-order model of the mistuned bladed disk. The resulting mathematical system is then solved by means of iterative solvers. This new method is tested and validated on different systems subjected to dry friction nonlinearities, from basic phenomenological models to large-scale finite element models of industrial structures. On lumped-parameter models, the performance of this method allows to investigate the statistical impact of mistuning in the presence of nonlinearities, by performing thousands of simulations. The results suggest that the behaviour of the nonlinear model can be significantly different from that of the linear one, hence the importance to carry out such investigations. The capabilities of the method have also been confirmed on large-scale models, by performing several forced response computations on a nonlinear and mistuned finite element model, at a reasonable cost
Ribaric, Adrijan Petar. "Orientation Invariant Characteristics of Deformable Bodies in Multibody Dynamics." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/238644.
Повний текст джерелаOrbay, Gunay. "Nonlinear Vibration Of Mistuned Bladed Disk Assemblies." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609740/index.pdf.
Повний текст джерелаmistuning&rdquo
which is defined as the vibration localization caused by the loss of cyclic periodicity which is a consequence of inter&
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blade variations in structural properties. In this thesis, component mode synthesis method (CMSM) is combined with nonlinear forced response analysis in modal domain. Newton&
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Raphson and arc length continuation procedures are implemented for the solution. The component mode synthesis method introduces the capability of imposing mistuning on the modal properties of each blade in the assembly. Forced response analysis in modal domain reduces the problem size via mode truncation. The main advantage of the proposed method is that it is capable of calculating nonlinear forced response for all the degrees&
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freedom at each blade with less computational effort. This makes it possible to make a stress analysis at resonance conditions. The case studies presented in this thesis emphasize the importance of number of modes retained in the reduced order model for both CMSM and nonlinear forced response analysis. Furthermore, the results of the case studies have shown that both nonlinearity and mistuning can cause shifts in resonance frequencies and changes in resonance amplitudes. Despite the changes in resonance conditions, the shape of the blade motion may not be affected.
Lindberg, Eskil. "A Vibro-Acoustic Study of Vehicle Suspension Systems : Experimental and Mathematical Component Approaches." Doctoral thesis, KTH, MWL Strukturakustik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-121575.
Повний текст джерелаQC 20130503
Bourmich, Sophie. "Optimisation de la qualité vibro-acoustique des structures d'automobiles pour les basses fréquences." Thesis, Ecully, Ecole centrale de Lyon, 2012. http://www.theses.fr/2012ECDL0026/document.
Повний текст джерелаFinite element models and the complexity of vehicle passenger compartments make it harder the optimization, mainly because of expensive computing resources and multiple coupled phenomena of fluid-structure problems. Strategies to improve time and memory performance consist in the use of reduction methods, and combined with efficient optimization techniques, vibro-acoustic solutions of better quality can be performed. The complexity of the system is taken into account thanks to a hierarchical optimization process. Both reduction method and gradient-based optimization algorithm are investigated. Based on modal synthesis, special criteria help to determine critical vibration propagation paths. A modified SQP (Sequential Quadratic Programming) algorithm is also developed in order to provide a faster convergence speed. Such process is to be applied on an academic example and hollow parts and panels of a whole passenger compartments. It allows to find relevant and non obvious solutions by minimizing noise and vibration transfer functions in a relatively wide range of frequencies
Beck, Joseph A. "Fundamental Understanding of Blisk Analytical Response." Wright State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=wright1367848915.
Повний текст джерелаMenday, M. T. "Multi-body dynamics analysis and experimental investigations for the determination of the physics of drive train vibro-impact induced elasto-acoustic coupling." Thesis, Loughborough University, 2003. https://dspace.lboro.ac.uk/2134/20789.
Повний текст джерелаBrown, Jeffrey M. "Reduced Order Modeling Methods for Turbomachinery Design." Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1229962254.
Повний текст джерелаRumpler, Romain. "Efficient finite element approach for structural-acoustic applicationns including 3D modelling of sound absorbing porous materials." Phd thesis, Conservatoire national des arts et metiers - CNAM, 2012. http://tel.archives-ouvertes.fr/tel-00726915.
Повний текст джерелаRumpler, Romain. "Efficient Finite Element Approach for Structural-Acoustic Applications including 3D modelling of Sound Absorbing Porous Materials." Doctoral thesis, KTH, MWL Numerisk akustik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-90335.
Повний текст джерелаDans le contexte de lutte contre les nuisances sonores, cette thèse porte sur le développement de méthodes de résolution efficaces par éléments finis, pour des problèmes de vibroacoustique interne avec interfaces dissipatives, dans le domaine des basses fréquences. L’étude se limite à l’utilisation de solutions passives telles que l’intégration de matériaux poreux homogènes et isotropes, modélisés par une approche fondée sur la théorie de Biot-Allard. Ces modèles étant coûteux en terme de résolution, un des objectifs de cette thèse est de proposer une approche modale pour la réduction du problème poroélastique, bien que l’adéquation d’une telle approche avec le comportement dynamique des matériaux poreux soit à démontrer.Dans un premier temps, la résolution de problèmes couplés élasto-poro-acoustiques par sous-structuration dynamique des domaines acoustiques et poreux est établie. L’approche modale originale proposée pour les milieux poroélastiques, ainsi qu’une procédure de sélection des modes significatifs, sont validées sur des exemples 1D à 3D.Une deuxième partie présente une méthode combinant l’utilisation des modèles réduits précédemment établis avec une procédure d’approximation de solution par approximants de Padé. Il est montré qu’une telle combinaison offre la possibilité d’accroître les performances de la résolution (allocation mémoire et ressources en temps de calcul).Un chapitre dédié aux applications permet d’évaluer et comparer les approches sur un problème académique 3D, mettant en valeur leurs performances encourageantes. Afin d’améliorer les méthodes établies dans cette thèse, des perspectives à ces travaux de recherche sont apportées en conclusion.
QC 20120224
FP6 Marie-Curie Smart Structures
FP7 Marie-Curie Mid-Frequency
Mahieux, Bruno. "Contribution à l'optimisation en masse de structures complexes sous contraintes vibratoires : application à la conception des planches de bord en phase d'études préliminaires." Valenciennes, 1996. http://www.theses.fr/1996VALE0031.
Повний текст джерелаKšica, Filip. "Modelování dynamických vlastností a chování technických soustav." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241945.
Повний текст джерелаCovi, Patrick. "Multi-hazard analysis of steel structures subjected to fire following earthquake." Doctoral thesis, Università degli studi di Trento, 2021. http://hdl.handle.net/11572/313383.
Повний текст джерелаTzu-ChiChiu and 邱子齊. "Application of ANSYS in Component Mode Synthesis." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/72631277124771399032.
Повний текст джерелаDu-ChingTsai and 蔡篤慶. "Dynamic Analysis of Structures Using Component Mode Synthesis." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/91706828919329978917.
Повний текст джерела國立成功大學
航空太空工程學系碩博士班
98
Conventional finite-element analysis may encounter the problem of insufficient computational resources especially when the structure system under consideration is very large and complex. This paper discusses the application of component mode synthesis for the dynamic analysis of structures. This method is that divides the structure into several components, reduces the component mode, keeps the important modes and compensation modes, and then assembles a reduced-order model of the entire structure. The critical problems lie in how to appropriately select the compensation modes to increase the precision of model. This paper improves the conventional fixed-interface component modes synthesis by introducing the concept of residual-stiffness into the solving process of conventional constraint mode, and then dealing with the problem which the constraint mode can’t be solved due to component’s constraint conditions may be insufficient. Simultaneously, this paper also discusses how to analyze the flexibility of interconnection structures by component mode synthesis. Through numerical simulation, component mode synthesis can effectively reduce model order of the large structure, and then increase analyzed effectiveness.
Yu-ChengTang and 湯育澄. "Application of the Method of Pseudo Mode Shape in Component Mode Synthesis." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/d4j8t9.
Повний текст джерела國立成功大學
航空太空工程學系
107
Conventional finite-element analysis may encounter the problem of insufficient computational resources especially when the structure system under consideration is large and complex. In order to reduce the model order of a system, Component Mode Synthesis is one of the reduction methods, which can make the structure system be divided into several components according to the features. Further finite element modeling or modal test analysis is performed on each component, and then these components are integrated into an approximate overall structural model. However, in the above synthesize process, it may face the combination of the two different types of information between the finite element model and the frequency response function obtained by the modal test, which makes it difficult to obtain the dynamic characteristics of the overall structural model. This thesis discusses how to apply the pseudo mode shape method to the component modal synthesis method. When the corresponding frequency response function of the component in the defined degree of freedom is measured, the pseudo mode shape matrix of the method converts the frequency response function of the component to obtain the substitute model matrix of the component at the physical coordinate. The surrogate model of this component is integrated with the finite element model into an approximate overall model, and the dynamic characteristics of the overall model can be appropriately described. The focus of this thesis is on how to use pseudo mode shapes to improve the accuracy of modal synthesis analysis. We improved the pseudo mode shape method proposed in the past, and used the full pseudo mode matrix to derive the equivalent analysis model, which can save the calculation programs of the vibration mode information at the joint. The equivalent analysis model still maintain the important dynamic characteristics of the original system. In this paper, a two-dimensional beam is taken as an example to verify the feasibility of the method.
Simone, Panconi. "Ottimizzazione della dinamica e del comfort di sistemi ferroviari e metropolitani di nuova generazione." Doctoral thesis, 2018. http://hdl.handle.net/2158/1127170.
Повний текст джерелаAmini, Aliakbar A. "Parametric study of rotor-bearing-pedestal system using component mode synthesis." Thesis, 1990. http://spectrum.library.concordia.ca/3867/1/ML56076.pdf.
Повний текст джерелаMuravyov, Alexander. "Analysis of damped linear dynamic systems and application of component mode synthesis." Thesis, 1994. http://hdl.handle.net/2429/5087.
Повний текст джерелаChen, Hong-kai, and 陳弘凱. "Component Mode Synthesis Method on the Dynamic Characteristics of Shrouded Turbo Blades." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/32319900613054458175.
Повний текст джерела國立中山大學
機械與機電工程學系研究所
99
The dynamic characteristics of shroud blade group played a significant role in steam turbine design. However, the complex shape and periodical structure of shroud blades make it so hard to find its dynamic characteristics under high speed operation. The complicate shape, periodic structure, and tedious computation limit the application of finite element method in the design analysis of shroud group blades. In order to design the shroud blade group, the component mode synthesis method was employed to derive the system dynamic equation of the grouped periodical blades. For simplicity, a pre-twisted and tapered cantilever beam is used to derive the approximate analytic solution of a rotating turbo blade. Then the approximated eigen solution of single blade is synthesized in company with the constrain condition by using the component mode synthesis method. In order to confirm the feasibility of the proposed simulation method, a real size turbine blade is used to discuss in the study. Through a comparison between the results solved from the proposed method and finite element method of single blade and shroud blade group to prove the reliability of the proposed method. The effect of blade parameters on the dynamic characteristic of shroud blade group has investigated in this work. Numerical results indicate the proposed method is feasible and effective in dynamic design analyses of the shroud blade group.
Smith, Malcolm J. "An evaluation of component mode synthesis for modal analysis of finite element models." Thesis, 1993. http://hdl.handle.net/2429/2256.
Повний текст джерелаHE, CHUAN-REN, and 何傳仁. "A study on the dynamic characteristics of heat exchanger tube by component mode synthesis method." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/46164086545783619291.
Повний текст джерелаLavelle, Francis M. III. "A Lanczos component mode synthesis algorithm for locally nonlinear systems with applications to seismic structural pounding." Thesis, 1991. http://hdl.handle.net/1911/16459.
Повний текст джерелаWANG, GING-GUO, and 汪清國. "The elastodynamic analysis and the component mode synthesis of high-speed flexible robot manipulators with mechanical joints." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/73934655633318387261.
Повний текст джерелаJames, Stephen M. "Adapting a Beam-Based Rotordynamics Model to Accept a General Three-Dimensional Finite-Element Casing Model." Thesis, 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7967.
Повний текст джерелаVasilescu, M. Alex O. "A Multilinear (Tensor) Algebraic Framework for Computer Graphics, Computer Vision and Machine Learning." Thesis, 2012. http://hdl.handle.net/1807/65327.
Повний текст джерела