Structural Dynamics

Einar N. StrømmenTechnology & Engineering
Structural Dynamics

Author: Einar N. Strømmen

Publisher: Springer Science & Business Media

ISBN: 9783319018027

Category: Technology & Engineering

Page: 510

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This book introduces to the theory of structural dynamics, with focus on civil engineering structures that may be described by line-like beam or beam-column type of systems, or by a system of rectangular plates. Throughout this book the mathematical presentation contains a classical analytical description as well as a description in a discrete finite element format, covering the mathematical development from basic assumptions to the final equations ready for practical dynamic response predictions. Solutions are presented in time domain as well as in frequency domain. Structural Dynamics starts off at a basic level and step by step brings the reader up to a level where the necessary safety considerations to wind or horizontal ground motion induced dynamic design problems can be performed. The special theory of the tuned mass damper has been given a comprehensive treatment, as this is a theory not fully covered elsewhere. For the same reason a chapter on the problem of moving loads on beams has been included.

Basic Structural Dynamics

James C. AndersonTechnology & Engineering
Basic Structural Dynamics

Author: James C. Anderson

Publisher: John Wiley & Sons

ISBN: 9781118279090

Category: Technology & Engineering

Page: 320

View: 839

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A concise introduction to structural dynamics and earthquake engineering Basic Structural Dynamics serves as a fundamental introduction to the topic of structural dynamics. Covering single and multiple-degree-of-freedom systems while providing an introduction to earthquake engineering, the book keeps the coverage succinct and on topic at a level that is appropriate for undergraduate and graduate students. Through dozens of worked examples based on actual structures, it also introduces readers to MATLAB, a powerful software for solving both simple and complex structural dynamics problems. Conceptually composed of three parts, the book begins with the basic concepts and dynamic response of single-degree-of-freedom systems to various excitations. Next, it covers the linear and nonlinear response of multiple-degree-of-freedom systems to various excitations. Finally, it deals with linear and nonlinear response of structures subjected to earthquake ground motions and structural dynamics-related code provisions for assessing seismic response of structures. Chapter coverage includes: Single-degree-of-freedom systems Free vibration response of SDOF systems Response to harmonic loading Response to impulse loads Response to arbitrary dynamic loading Multiple-degree-of-freedom systems Introduction to nonlinear response of structures Seismic response of structures If you're an undergraduate or graduate student or a practicing structural or mechanical engineer who requires some background on structural dynamics and the effects of earthquakes on structures, Basic Structural Dynamics will quickly get you up to speed on the subject without sacrificing important information.

Computational Structural Dynamics

K. TalaganovTechnology & Engineering
Computational Structural Dynamics

Author: K. Talaganov

Publisher: CRC Press

ISBN: 9058093689

Category: Technology & Engineering

Page: 214

View: 910

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The papers in this volume deal with the demonstration of the possibilities offered by computational technology as to finding better solutions to problems in different fields of structural dynamics, with a special emphasis on earthquake structural dynamics.

Structure-preserving Integrators in Nonlinear Structural Dynamics and Flexible Multibody Dynamics

Peter BetschTechnology & Engineering
Structure-preserving Integrators in Nonlinear Structural Dynamics and Flexible Multibody Dynamics

Author: Peter Betsch

Publisher: Springer

ISBN: 9783319318790

Category: Technology & Engineering

Page: 291

View: 522

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This book focuses on structure-preserving numerical methods for flexible multibody dynamics, including nonlinear elastodynamics and geometrically exact models for beams and shells. It also deals with the newly emerging class of variational integrators as well as Lie-group integrators. It discusses two alternative approaches to the discretization in space of nonlinear beams and shells. Firstly, geometrically exact formulations, which are typically used in the finite element community and, secondly, the absolute nodal coordinate formulation, which is popular in the multibody dynamics community. Concerning the discretization in time, the energy-momentum method and its energy-decaying variants are discussed. It also addresses a number of issues that have arisen in the wake of the structure-preserving discretization in space. Among them are the parameterization of finite rotations, the incorporation of algebraic constraints and the computer implementation of the various numerical methods. The practical application of structure-preserving methods is illustrated by a number of examples dealing with, among others, nonlinear beams and shells, large deformation problems, long-term simulations and coupled thermo-mechanical multibody systems. In addition it links novel time integration methods to frequently used methods in industrial multibody system simulation.

Exploiting Nonlinear Behavior in Structural Dynamics

David WaggTechnology & Engineering
Exploiting Nonlinear Behavior in Structural Dynamics

Author: David Wagg

Publisher: Springer Science & Business Media

ISBN: 9783709111871

Category: Technology & Engineering

Page: 280

View: 276

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Introductory material.- Approximate methods for analyzing nonlinear structures.- Vibration isolation.- Designing nonlinear torsional vibration absorbers.- Vibrations of beams in the elasto-plastic and geometrically nonlinear regime.- Control and exploitation of nonlinearity in smart structures. The articles in this volume give an overview and introduction to nonlinear phenomena in structural dynamics. Topics treated are approximate methods for analyzing nonlinear systems (where the level of nonlinearity is assumed to be relatively small), vibration isolation, the mitigation of undesirable torsional vibration in rotating systems utilizing specifically nonlinear features in the dynamics, the vibration of nonlinear structures in which the motion is sufficiently large amplitude and structural systems with control.

Advanced Structural Dynamics and Active Control of Structures

Wodek GawronskiTechnology & Engineering
Advanced Structural Dynamics and Active Control of Structures

Author: Wodek Gawronski

Publisher: Springer Science & Business Media

ISBN: 9780387406497

Category: Technology & Engineering

Page: 408

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Science is for those who learn; poetry for those who know. —Joseph Roux This book is a continuation of my previous book, Dynamics and Control of Structures [44]. The expanded book includes three additional chapters and an additional appendix: Chapter 3, “Special Models”; Chapter 8, “Modal Actuators and Sensors”; and Chapter 9, “System Identification. ” Other chapters have been significantly revised and supplemented with new topics, including discrete-time models of structures, limited-time and -frequency grammians and reduction, almo- balanced modal models, simultaneous placement of sensors and actuators, and structural damage detection. The appendices have also been updated and expanded. Appendix A consists of thirteen new Matlab programs. Appendix B is a new addition and includes eleven Matlab programs that solve examples from each chapter. In Appendix C model data are given. Several books on structural dynamics and control have been published. Meirovitch’s textbook [108] covers methods of structural dynamics (virtual work, d’Alambert’s principle, Hamilton’s principle, Lagrange’s and Hamilton’s equations, and modal analysis of structures) and control (pole placement methods, LQG design, and modal control). Ewins’s book [33] presents methods of modal testing of structures. Natke’s book [111] on structural identification also contains excellent material on structural dynamics. Fuller, Elliot, and Nelson [40] cover problems of structural active control and structural acoustic control.

Nonlinear Structural Dynamics and Damping

Juan Carlos JaureguiTechnology & Engineering
Nonlinear Structural Dynamics and Damping

Author: Juan Carlos Jauregui

Publisher: Springer

ISBN: 9783030133177

Category: Technology & Engineering

Page: 320

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This book compiles recent research in the field of nonlinear dynamics, vibrations and damping applied to engineering structures. It addresses the modeling of nonlinear vibrations in beams, frames and complex mechanical systems, as well as the modeling of damping systems and viscoelastic materials applied to structural dynamics. The book includes several chapters related to solution techniques and signal analysis techniques. Last but not least, it deals with the identification of nonlinear responses applied to condition monitoring systems.

Time-parallel Methods for Accelerating the Solution of Structural Dynamics Problems

Julien Remi Cortial
Time-parallel Methods for Accelerating the Solution of Structural Dynamics Problems

Author: Julien Remi Cortial

Publisher: Stanford University

ISBN: STANFORD:yb329wp2731

Category:

Page: 188

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The classical approach for solving evolution Partial Differential Equations (PDEs) using a parallel computer consists in first partitioning the spatial domain and assigning each subdomain to a processor to achieve space-parallelism, then advancing the solution sequentially. However, enabling parallelism along the time dimension, despite its intrinsic difficulty, can be of paramount importance to fast computations when space-parallelism is unfeasible, cannot fully exploit a massively parallel machine or when near-real-time prediction is desired. The aforementioned objective can be achieved by applying classical domain decomposition principles to the time axis. The latter is first partitioned into time-slices to be processed independently. Starting with approximate seed information that provides a set of initial conditions, the response is then advanced in parallel in each time-slice using a standard time-stepping integrator. This decomposed solution exhibits discontinuities or jumps at the time-slice boundaries if the initial guess is not accurate. Applying a Newton-like approach to the time-dependent system, a correction function is then computed to improve the accuracy of the seed values and the process is repeated until convergence is reached. Methods based on the above concept have been successfully applied to various problems but none was found to be competitive for even for the simplest of second-order hyperbolic PDEs, a class of equations that covers the field of structural dynamics among others. To overcome this difficulty, a key idea is to improve the sequential propagator used for correcting the seed values, observing that the original evolution problem and the derived corrective one are closely related. The present work first demonstrates how this insight can be brought to fruition in the context of linear oscillators, with numerical examples featuring structural models ranging from academic to more challenging large-scale ones. An extension of this method to nonlinear equations is then developed and its concrete application to geometrically nonlinear transient dynamics is presented. Finally, it is shown how the time-reversibility property that characterizes some of the above problems can be exploited to develop a new framework that provides an increased speed-up factor.

Structural Dynamics

Konstantin MeskourisScience
Structural Dynamics

Author: Konstantin Meskouris

Publisher: Wiley-VCH

ISBN: UOM:39015036038324

Category: Science

Page: 341

View: 575

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Since vibration is a common problem in many civil engineering structures, it is becoming increasingly important for civil engineers to gain an insight into the principles involved and to know how to use modern, computer-based methods. Designed for engineering students and practitioners alike, this is a comprehensive introduction to the theory of structural dynamics, placing special emphasis on practical issues and applications, illustrated by a wide range of worked examples. The book features a large number of computer programs as ready-to-use applications on a CD-ROM, complete with detailed input/output descriptions and auxiliary software. In the spirit of "learning by doing", readers are encouraged to apply these tools immediately to their specific problems, thus familiarising themselves with the broad field of structural dynamic response in the process.

Structural Dynamic Systems Computational Techniques and Optimization

Cornelius T. LeondesComputer-aided design
Structural Dynamic Systems Computational Techniques and Optimization

Author: Cornelius T. Leondes

Publisher: Elsevier

ISBN: 9056996568

Category: Computer-aided design

Page: 262

View: 789

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Conventional seismic design has been based on structural strength in the initial design of structures, resulting in lateral force resisting systems with sufficient strength to be able to absorb and dissipate the seismic. For important structures such as urban high speed road systems, high rise buildings, hospitals, airports and other essential structures which must be quite functional after an earthquake, modern seismic structural design techniques have been developed with a view toward eliminating or significantly reducing seismic damage to such structures. This volume is a comprehensive treatment of the issues involved in modern seismic design techniques for structure with a view to significantly enhancing their capability of surviving earthquakes to an adequate degree, i.e., enhancing the ability of structural systems to withstand high level earthquakes.