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

Structure-preserving Integrators in Nonlinear Structural Dynamics and Flexible Multibody Dynamics
Author: Peter Betsch
Publisher: Springer
Total Pages: 298
Release: 2016-05-10
Genre: Technology & Engineering
ISBN: 3319318799

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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.


Thermodynamically consistent space-time discretization of non-isothermal mechanical systems in the framework of GENERIC

Thermodynamically consistent space-time discretization of non-isothermal mechanical systems in the framework of GENERIC
Author: Schiebl, Mark Georg
Publisher: KIT Scientific Publishing
Total Pages: 238
Release: 2022-01-18
Genre: Technology & Engineering
ISBN: 3731511177

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The present work addresses the design of structure-preserving numerical methods that emanate from the general equation for non-equilibrium reversible-irreversible coupling (GENERIC) formalism. Novel energy-momentum (EM) consistent time-stepping schemes in the realm of molecular dynamics are proposed. Moreover, the GENERIC-based structure-preserving numerical methods are extended to the context of large-strain thermoelasticity and thermo-viscoelasticity.


Inverse dynamics of underactuated flexible mechanical systems governed by quasi-linear hyperbolic partial differential equations

Inverse dynamics of underactuated flexible mechanical systems governed by quasi-linear hyperbolic partial differential equations
Author: Ströhle, Timo
Publisher: KIT Scientific Publishing
Total Pages: 174
Release: 2024-02-26
Genre:
ISBN: 3731513366

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This work is about the inverse dynamics of underactuated flexible mechanical systems governed by quasi-linear hyperbolic partial differential equations subjected to time-varying Dirichlet boundary conditions that are enforced by unknown, spatially disjunct, hence non-collocated Neumann boundary conditions.


Surveys in Differential-Algebraic Equations IV

Surveys in Differential-Algebraic Equations IV
Author: Achim Ilchmann
Publisher: Springer
Total Pages: 305
Release: 2017-03-08
Genre: Mathematics
ISBN: 3319466186

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The present volume comprises survey articles on various fields of Differential-Algebraic Equations (DAEs) which have widespread applications in controlled dynamical systems, especially in mechanical and electrical engineering and a strong relation to (ordinary) differential equations. The individual chapters provide reviews, presentations of the current state of research and new concepts in - History of DAEs - DAE aspects of mechanical multibody systems - Model reduction of DAEs - Observability for DAEs - Numerical Analysis for DAEs The results are presented in an accessible style, making this book suitable not only for active researchers but also for graduate students (with a good knowledge of the basic principles of DAEs) for self-study.


Proceedings of 8th GACM Colloquium on Computational Mechanics

Proceedings of 8th GACM Colloquium on Computational Mechanics
Author: Tobias Gleim
Publisher: kassel university press GmbH
Total Pages: 493
Release: 2019-09-04
Genre: Technology & Engineering
ISBN: 3737650934

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This conference book contains papers presented at the 8th GACM Colloquium on Computational Mechanics for Young Scientists from Academia and Industry. The conference was held from August 28th – 30th, 2019 in Kassel, hosted by the Institute of Mechanics and Dynamics of the department for civil and environmental engineering and by the chair of Engineering Mechanics / Continuum Mechanics of the department for mechanical engineering of the University of Kassel. The aim of the conference is, to bring together young scientits who are engaged in academic and industrial research on Computational Mechanics and Computer Methods in Applied Sciences. It provides a plattform to present and discuss recent results from research efforts and industrial applications. In more than 150 presentations, given by young scientists, current scientific developments and advances in engineering practice in this field are presented and discussed. The contributions of the young researchers are supplemented by a poster session and plenary talks from four senior scientists from academia and industry as well as from the GACM Best PhD Award winners 2017 and 2018.


Novel Mathematics Inspired by Industrial Challenges

Novel Mathematics Inspired by Industrial Challenges
Author: Michael Günther
Publisher: Springer Nature
Total Pages: 348
Release: 2022-03-30
Genre: Mathematics
ISBN: 3030961737

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This contributed volume convenes a rich selection of works with a focus on innovative mathematical methods with applications in real-world, industrial problems. Studies included in this book are all motivated by a relevant industrial challenge, and demonstrate that mathematics for industry can be extremely rewarding, leading to new mathematical methods and sometimes even to entirely new fields within mathematics. The book is organized into two parts: Computational Sciences and Engineering, and Data Analysis and Finance. In every chapter, readers will find a brief description of why such work fits into this volume; an explanation on which industrial challenges have been instrumental for their inspiration; and which methods have been developed as a result. All these contribute to a greater unity of the text, benefiting not only practitioners and professionals seeking information on novel techniques but also graduate students in applied mathematics, engineering, and related fields.


Nonlinear Dynamics of Structures, Systems and Devices

Nonlinear Dynamics of Structures, Systems and Devices
Author: Walter Lacarbonara
Publisher: Springer Nature
Total Pages: 592
Release: 2020-01-29
Genre: Science
ISBN: 3030347133

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This first of three volumes from the inaugural NODYCON, held at the University of Rome, in February of 2019, presents papers devoted to Nonlinear Dynamics of Structures, Systems and Devices. The collection features both well-established streams of research as well as novel areas and emerging fields of investigation. Topics in Volume I include multi-scale dynamics: coexistence of multiple time/space scales, large system dynamics; dynamics of structures/industrial machines/equipment/facilities (e.g., cable transportation systems, suspension bridges, cranes, vehicles); nonlinear interactions: parametric vibrations with single/multi-frequency excitations, multiple external and autoparametric resonances in multi-dof systems; nonlinear system identification: parametric/nonparametric identification, data-driven identification; experimental dynamics: benchmark experiments, experimental methods, instrumentation techniques, measurements in harsh environments, experimental validation of nonlinear models; wave propagation, solitons, kinks, breathers; solution methods for pdes: Lie groups, Hirota’s method, perturbation methods, etc; nonlinear waves in media (granular materials, porous materials, materials with memory); composite structures: multi-layer, functionally graded, thermal loading; fluid/structure interaction; nonsmooth and retarded dynamics: systems with impacts, free play, stick-slip, friction hysteresis; nonlinear systems with time and/or space delays; stability of delay differential equations, differential-algebraic equations; space/time reduced-order modeling: enhanced discretization methods, center manifold reduction, nonlinear normal modes, normal forms; fractional-order systems; computational techniques: efficient algorithms, use of symbolic manipulators, integration of symbolic manipulation and numerical methods, use of parallel processors; and multibody dynamics: rigid and flexible multibody system dynamics, impact and contact mechanics, tire modeling, railroad vehicle dynamics, computational multibody dynamics.


Computational Aspects of Nonlinear Structural Systems with Large Rigid Body Motion

Computational Aspects of Nonlinear Structural Systems with Large Rigid Body Motion
Author: Jorge A. C. Ambrósio
Publisher:
Total Pages: 304
Release: 2001
Genre: Machinery, Dynamics of
ISBN:

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Published as an outgrowth of a July 2000 NATO Advanced Research Workshop, this volume brings together work representing the various generally non-interacting scientific communities concerned with the workshop topic, in the interests of generating some cross-talk. The field has seen some major recent developments, some finding their way into commercial, general purpose software intended for complex industrial applications. Thirteen contributions consider four major themes: flexible multibody systems, finite element procedures for structural systems with large rotations, numerical integration methods for rigid and flexible systems, and advanced methods in systems with large rigid body motion. The contributors are based in France, Italy, Germany, Greece, Portugal, Poland, the US, and Australia. Author index only. Annotation copyrighted by Book News, Inc., Portland, OR.


Flexible Multibody Dynamics

Flexible Multibody Dynamics
Author: O. A. Bauchau
Publisher: Springer Science & Business Media
Total Pages: 730
Release: 2010-10-23
Genre: Technology & Engineering
ISBN: 940070335X

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The author developed this text over many years, teaching graduate courses in advanced dynamics and flexible multibody dynamics at the Daniel Guggenheim School of Aerospace Engineering of the Georgia Institute of Technology. The book presents a unified treatment of rigid body dynamics, analytical dynamics, constrained dynamics, and flexible multibody dynamics. A comprehensive review of numerical tools used to enforce both holonomic and nonholonomic constraints is presented. Advanced topics such as Maggi’s, index-1, null space, and Udwadia and Kalaba’s formulations are presented because of their fundamental importance in multibody dynamics. Methodologies for the parameterization of rotation and motion are discussed and contrasted. Geometrically exact beams and shells formulations, which have become the standard in flexible multibody dynamics, are presented and numerical aspects of their finite element implementation detailed. Methodologies for the direct solution of the index-3 differential-algebraic equations characteristic of constrained multibody systems are presented. It is shown that with the help of proper scaling procedures, such equations are not more difficult to integrate than ordinary differential equations. This book is illustrated with numerous examples and should prove valuable to both students and researchers in the fields of rigid and flexible multibody dynamics.