Design Optimization And Vibration Control Of Adaptive Structures
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Design Optimization And Vibration Control Of Adaptive Structures
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Author : Domínguez-González Aurelio.
language : en
Publisher:
Release Date : 2005
Design Optimization And Vibration Control Of Adaptive Structures written by Domínguez-González Aurelio. and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Design Optimization And Vibration Control Of Adaptive Structures
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Author : Aurelio Domínguez-González
language : en
Publisher:
Release Date : 2005
Design Optimization And Vibration Control Of Adaptive Structures written by Aurelio Domínguez-González and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
In the present research work the optimization of structures and the vibration suppression are studied. First, a methodology to find the simultaneous size, geometry and topology design optimization of structures using Genetic Algorithms (GAs) is proposed. The methodology considers that the large structures are constructed from the duplication of some basic structures called bays. In order to have realistic optimal designs, the cross-sectional areas are extracted from the standard profiles and the optimization process is performed considered the AISC design standards. The second part of the work is concerned with the suppression of the vibration in structural systems. A methodology to find the characteristic parameters of the Bouc-Wen model in the attempt to better characterize the hysteresis phenomenon of MR dampers has been proposed. The methodology takes into consideration the effect of each individual term of the Bouc-Wen model over the hysteretic loop to estimate the appropriate values of the parameters. Considering the relationships of the characteristic parameters, a new model based on the Bouc-Wen model is proposed in which the current, the frequency and the amplitude excitation are incorporated as variables. Based on the proposed hysteresis model, a Finite Element Model (FEM) for the MR damper is developed and then integrated to the FEM of the entire structure. Subsequently, an efficient vibration suppression strategy using MR damper was proposed to improve the vibration performance index of the structure. Finally, the same hysteresis model is employed to investigate the application of MR dampers as translational actuator.
Adaptive And Robust Active Vibration Control
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Author : Ioan Doré Landau
language : en
Publisher: Springer
Release Date : 2016-09-15
Adaptive And Robust Active Vibration Control written by Ioan Doré Landau and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-09-15 with Technology & Engineering categories.
This book approaches the design of active vibration control systems from the perspective of today’s ideas of computer control. It formulates the various design problems encountered in the active management of vibration as control problems and searches for the most appropriate tools to solve them. The experimental validation of the solutions proposed on relevant tests benches is also addressed. To promote the widespread acceptance of these techniques, the presentation eliminates unnecessary theoretical developments (which can be found elsewhere) and focuses on algorithms and their use. The solutions proposed cannot be fully understood and creatively exploited without a clear understanding of the basic concepts and methods, so these are considered in depth. The focus is on enhancing motivations, algorithm presentation and experimental evaluation. MATLAB®routines, Simulink® diagrams and bench-test data are available for download and encourage easy assimilation of the experimental and exemplary material. Three major problems are addressed in the book: active damping to improve the performance of passive absorbers; adaptive feedback attenuation of single and multiple tonal vibrations; and feedforward and feedback attenuation of broad band vibrations. Adaptive and Robust Active Vibration Control will interest practising engineers and help them to acquire new concepts and techniques with good practical validation. It can be used as the basis for a course for graduate students in mechanical, mechatronics, industrial electronics, aerospace and naval engineering. Readers working in active noise control will also discover techniques with a high degree of cross-over potential for use in their field.
Design Optimization Of Active And Passive Structural Control Systems
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Author : Lagaros, Nikos D.
language : en
Publisher: IGI Global
Release Date : 2012-08-31
Design Optimization Of Active And Passive Structural Control Systems written by Lagaros, Nikos D. and has been published by IGI Global this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-08-31 with Technology & Engineering categories.
A typical engineering task during the development of any system is, among others, to improve its performance in terms of cost and response. Improvements can be achieved either by simply using design rules based on the experience or in an automated way by using optimization methods that lead to optimum designs. Design Optimization of Active and Passive Structural Control Systems includes Earthquake Engineering and Tuned Mass Damper research topics into a volume taking advantage of the connecting link between them, which is optimization. This is a publication addressing the design optimization of active and passive control systems. This title is perfect for engineers, professionals, professors, and students alike, providing cutting edge research and applications.
Adaptive Structures
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Author : David Wagg
language : en
Publisher: John Wiley & Sons
Release Date : 2008-04-09
Adaptive Structures written by David Wagg and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-04-09 with Technology & Engineering categories.
Adaptive structures have the ability to adapt, evolve or change their properties or behaviour in response to the environment around them. The analysis and design of adaptive structures requires a highly multi-disciplinary approach which includes elements of structures, materials, dynamics, control, design and inspiration taken from biological systems. Development of adaptive structures has been taking place in a wide range of industrial applications, but is particularly advanced in the aerospace and space technology sector with morphing wings, deployable space structures; piezoelectric devices and vibration control of tall buildings. Bringing together some of the foremost world experts in adaptive structures, this unique text: includes discussions of the application of adaptive structures in the aerospace, military, civil engineering structures, automotive and MEMS. presents the impact of biological inspiration in designing adaptive structures, particularly the use of hierarchy in nature, which typically induces multi-functional behavior. sets the agenda for future research in adaptive structures in one distinctive single volume. Adaptive Structures: Engineering Applications is essential reading for engineers and scientists working in the fields of intelligent materials, structural vibration, control and related smart technologies. It will also be of interest to senior undergraduate and postgraduate research students as well as design engineers working in the aerospace, mechanical, electrical and civil engineering sectors.
Design And Optimization Of Magnetorheological Elastomer Based Adaptive Tuned Vibration Absorber
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Author : Fan Lin
language : en
Publisher:
Release Date : 2020
Design And Optimization Of Magnetorheological Elastomer Based Adaptive Tuned Vibration Absorber written by Fan Lin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020 with categories.
The excessive vibration if not properly controlled can cause premature fatigue failure of structural component. One effective way to attenuate vibration is to attach a tuned vibration absorber to the main structural component. Passive tuned vibration absorbers are mainly effective to attenuate vibration at specific tune frequencies and they significantly lose their effectiveness under mistuned conditions due to variation in environmental condition. The main objective of the present research study is to develop a wide-bandwidth and light-weight adaptive tuned vibration absorber (ATVA) featuring magnetorheological elastomer (MRE) to be tuned on a simply supported beam. The accelerance transfer function has been derived for both beam with and without ATVA. The effectiveness of the ATVA to control vibration at varying external excitation is then demonstrated. Proposed ATVA consists of C-Shape frame with winding coils, two MRE specimens and active mass. Isotropic MRE with 40% volume fraction has been experimentally tested and a quasi-static micromechanics and dynamic parametric model have been developed to predict the MRE's elastic modulus at various frequency and applied magnetic field. Using MRE models and magneto-circuit analysis, the frequency bandwidth of the ATVA was analytically obtained. Finally, a multidisciplinary design optimization formulation has then been developed to minimize the mass and maximize the frequency bandwidth of an ATVA featuring magnetorheological elastomer (MRE).
Reliability Based Design Optimization Of Structures
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Author : Hang Yu
language : fr
Publisher:
Release Date : 2011
Reliability Based Design Optimization Of Structures written by Hang Yu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
En conception de produits ou de systèmes, les approches d'optimisation déterministe sont de nos jours largement utilisées. Toutefois, ces approches ne tiennent pas compte des incertitudes inhérentes aux modèles utilises, ce qui peut parfois aboutir à des solutions non fiables. Il convient alors de s'intéresser aux approches d'optimisation stochastiques. Les approches de conception robuste à base d'optimisation stochastique (Reliablity Based Robust Design Optimization, RBRDO) tiennent compte des incertitudes lors de l'optimisation au travers d'une boucle supplémentaire d'analyse des incertitudes(Uncertainty Anlysis, UA). Pour la plupart des applications pratiques, l'UA est réalisée par une simulation de type Monte Carlo (Monte Carlo Simulation, MCS) combinée avec l’analyse structurale. L'inconvénient majeur de ce type d'approche réside dans le coût de calcul qui se révèle être prohibitif. Par conséquent, nous nous sommes intéressés dans nos travaux aux développements de méthodologies efficaces pour la mise en place de RBRDO s'appuyant sur une analyse MCS. Nous présentons une méthode d'UA s'appuyant sur une analyse MCS dans laquelle la réponse aléatoire est approximée sur une base du chaos polynomial (Polynomial Chaos Expansion, PCE). Ainsi, l'efficacité de l'UA est grandement améliorée en évitant une trop grande répétition des analyses structurales. Malheureusement, cette approche n'est pas pertinente dans le cadre de problèmes en grande dimension, par exemple pour des applications en dynamique. Nous proposons ainsi d'approximer la réponse dynamique en ne tenant compte que de la résolution aux valeurs propres aléatoires. De cette façon, seuls les paramètres structuraux aléatoires apparaissent dans le PCE. Pour traiter le problème du mélange des modes dans notre approche, nous nous sommes appuyés sur le facteur MAC qui permet de le quantifier. Nous avons développé une méthode univariable permettant de verifier quelle variable générait un mélange de modes de manière à le réduire ou le supprimer. Par la suite, nous présentons une approche de RBRDO séquentielle pour améliorer l'efficacité et éviter les problèmes de non-convergence présents dans les approches de RBRDO. Dans notre approche, nous avons étendu la stratégie séquentielle classique, visant principalement à découpler l'analyse de fiabilité de la procédure d'optimisation, en séparant l'évaluation des moments de la boucle d'optimisation. Nous avons utilisé une approximation exponentielle locale autour du point de conception courant pour construire des objectifs déterministes équivalents ainsi que des contraintes stochastiques. De manière à obtenir les différents coefficients pour notre approximation, nous avons développé une analyse de sensibilité de la robustesse basée sur une distribution auxiliaire ainsi qu'une analyse de sensibilité des moments basée sur l'approche PCE. Nous montrons la pertinence ainsi que l'efficacité des approches proposées au travers de différents exemples numériques. Nous appliquons ensuite notre approche de RBRDO pour la conception d'un amortisseur dans le domaine du contrôle passif vibratoire d'une structure présentant des grandeurs aléatoires. Les résultats obtenus par notre approche permettent non seulement de réduire la variabilité de la réponse, mais aussi de mieux contrôler l'amplitude de la réponse au travers d'un seuil choisi par avance.
Smart Materials And Structures
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Author : G.R Tomlinson
language : en
Publisher: CRC Press
Release Date : 1998-01-01
Smart Materials And Structures written by G.R Tomlinson and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-01-01 with Technology & Engineering categories.
Significant changes have occurred in materials science, including increasing demands on life extensions, and the reliability and exploitability of components, materials, and structures. These changes provide smart technologies with excellent application opportunities in aerospace, civil and electrical engineering, transportation, manufacturing, communications, defense, and medicine. Smart Materials and Structures presents an overview of current developments in the characterization and applications of materials and actuators, issues surrounding their control, and the integration of smart systems and technologies. This compendium provides a valuable synopsis of this rapidly expanding and topical research field for engineers, program managers, technologists, physicists, materials scientists, and mathematicians working to advance smart materials, research methods, their applications, and robotic technologies.
Vibration Control For Building Structures
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Author : Aiqun Li
language : en
Publisher: Springer Nature
Release Date : 2020-03-11
Vibration Control For Building Structures written by Aiqun Li and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-03-11 with Technology & Engineering categories.
This book presents a comprehensive introduction to the field of structural vibration reduction control, but may also be used as a reference source for more advanced topics. The content is divided into four main parts: the basic principles of structural vibration reduction control, structural vibration reduction devices, structural vibration reduction design methods, and structural vibration reduction engineering practices. As the book strikes a balance between theoretical and practical aspects, it will appeal to researchers and practicing engineers alike, as well as graduate students.
Adaptive Structures Eleventh International Conference Proceedings
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Author : Yuji Matsuzaki
language : en
Publisher: CRC Press
Release Date : 2001-03-01
Adaptive Structures Eleventh International Conference Proceedings written by Yuji Matsuzaki and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-03-01 with Technology & Engineering categories.
