multidisciplinary design optimization in computational mechanics

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Multidisciplinary Design Optimization In Computational Mechanics

Author : Piotr Breitkopf
ISBN : 9781118600009
Genre : Technology & Engineering
File Size : 27. 82 MB
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This book provides a comprehensive introduction to the mathematical and algorithmic methods for the Multidisciplinary Design Optimization (MDO) of complex mechanical systems such as aircraft or car engines. We have focused on the presentation of strategies efficiently and economically managing the different levels of complexity in coupled disciplines (e.g. structure, fluid, thermal, acoustics, etc.), ranging from Reduced Order Models (ROM) to full-scale Finite Element (FE) or Finite Volume (FV) simulations. Particular focus is given to the uncertainty quantification and its impact on the robustness of the optimal designs. A large collection of examples from academia, software editing and industry should also help the reader to develop a practical insight on MDO methods.

Multidisciplinary Design Optimization

Author : Natalia M. Alexandrov
ISBN : 0898713595
Genre : Design
File Size : 76. 27 MB
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Multidisciplinary design optimization (MDO) has recently emerged as a field of research and practice that brings together many previously disjointed disciplines and tools of engineering and mathematics. MDO can be described as a technology, environment, or methodology for the design of complex, coupled engineering systems, such as aircraft, automobiles, and other mechanisms, the behavior of which is determined by interacting subsystems.

Metamodel Based Multidisciplinary Design Optimization Of Automotive Structures

Author : Ann-Britt Ryberg
ISBN : 9789176854822
Genre : Electronic books
File Size : 32. 38 MB
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Multidisciplinary design optimization (MDO) can be used in computer aided engineering (CAE) to efficiently improve and balance performance of automotive structures. However, large-scale MDO is not yet generally integrated within automotive product development due to several challenges, of which excessive computing times is the most important one. In this thesis, a metamodel-based MDO process that fits normal company organizations and CAE-based development processes is presented. The introduction of global metamodels offers means to increase computational efficiency and distribute work without implementing complicated multi-level MDO methods. The presented MDO process is proven to be efficient for thickness optimization studies with the objective to minimize mass. It can also be used for spot weld optimization if the models are prepared correctly. A comparison of different methods reveals that topology optimization, which requires less model preparation and computational effort, is an alternative if load cases involving simulations of linear systems are judged to be of major importance. A technical challenge when performing metamodel-based design optimization is lack of accuracy for metamodels representing complex responses including discontinuities, which are common in for example crashworthiness applications. The decision boundary from a support vector machine (SVM) can be used to identify the border between different types of deformation behaviour. In this thesis, this information is used to improve the accuracy of feedforward neural network metamodels. Three different approaches are tested; to split the design space and fit separate metamodels for the different regions, to add estimated guiding samples to the fitting set along the boundary before a global metamodel is fitted, and to use a special SVM-based sequential sampling method. Substantial improvements in accuracy are observed, and it is found that implementing SVM-based sequential sampling and estimated guiding samples can result in successful optimization studies for cases where more conventional methods fail.

The Rayleigh Ritz Method For Structural Analysis

Author : Sinniah Ilanko
ISBN : 9781118984420
Genre : Science
File Size : 62. 8 MB
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A presentation of the theory behind the Rayleigh-Ritz (R-R) method, as well as a discussion of the choice of admissible functions and the use of penalty methods, including recent developments such as using negative inertia and bi-penalty terms. While presenting the mathematical basis of the R-R method, the authors also give simple explanations and analogies to make it easier to understand. Examples include calculation of natural frequencies and critical loads of structures and structural components, such as beams, plates, shells and solids. MATLAB codes for some common problems are also supplied.

Emerging Methods For Multidisciplinary Optimization

Author : Jan Blachut
ISBN : 9783709127568
Genre : Science
File Size : 59. 12 MB
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This volume provides an up-to-date overview of major advances, emerging trends, and projected industrial applications in the field of multidisciplinary optimization. It concentrates on the current status of the field, exposes commonalities, innovative, promising, and speculative methods. This book provides a view of today’s multidisciplinary optimization environment through a balenced theoretical and practical treatment. The contributors are the foremost authorities in each area of specialisation.

Multidisciplinary Design Optimization An Emerging New Engineering Discipline

Author : Jarowslaw Sobieszczanski-Sobieski
ISBN : NASA:31769000617665
Genre : Airplanes
File Size : 59. 41 MB
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Jahrbuch

Author : Deutsche Gesellschaft für Luft- und Raumfahrt
ISBN : STANFORD:36105015178176
Genre : Aeronautics
File Size : 74. 22 MB
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Introduction To Optimization Methods And Tools For Multidisciplinary Design In Aeronautics And Turbomachinery

Author : Jacques Periaux
ISBN : STANFORD:36105210620840
Genre : Aerodynamics
File Size : 74. 65 MB
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Optimization And Computational Fluid Dynamics

Author : Dominique Thévenin
ISBN : 3540721533
Genre : Technology & Engineering
File Size : 22. 64 MB
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The numerical optimization of practical applications has been an issue of major importance for the last 10 years. It allows us to explore reliable non-trivial configurations, differing widely from all known solutions. The purpose of this book is to introduce the state-of-the-art concerning this issue and many complementary applications are presented.

Iii European Conference On Computational Mechanics

Author : C. A. Mota Soares
ISBN : 9781402053702
Genre : Technology & Engineering
File Size : 67. 66 MB
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III European Conference on Computational Mechanics: Solids, Structures and Coupled Problem in Engineering Computational Mechanics in Solid, Structures and Coupled Problems in Engineering is today a mature science with applications to major industrial projects. This book contains the edited version of the Abstracts of Plenary and Keynote Lectures and Papers, and a companion CD-ROM with the full-length papers, presented at the III European Conference on Computational Mechanics: Solids, Structures and Coupled Problems in Engineering (ECCM-2006), held in the National Laboratory of Civil Engineering, Lisbon, Portugal 5th - 8th June 2006. The book reflects the state-of-art of Computation Mechanics in Solids, Structures and Coupled Problems in Engineering and it includes contributions by the world most active researchers in this field.

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