Metamodel-Based Multidisciplinary Design Optimization of Automotive Structures

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Release : 2017-09-14
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Book Rating : 825/5 ( reviews)

Metamodel-Based Multidisciplinary Design Optimization of Automotive Structures - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Metamodel-Based Multidisciplinary Design Optimization of Automotive Structures write by Ann-Britt Ryberg. This book was released on 2017-09-14. Metamodel-Based Multidisciplinary Design Optimization of Automotive Structures available in PDF, EPUB and Kindle. 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.

Metamodel-based Multidisciplinary Design Optimization for Automotive Applications

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Release : 2012
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Metamodel-based Multidisciplinary Design Optimization for Automotive Applications - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Metamodel-based Multidisciplinary Design Optimization for Automotive Applications write by . This book was released on 2012. Metamodel-based Multidisciplinary Design Optimization for Automotive Applications available in PDF, EPUB and Kindle.

Multidisciplinary Design Optimization

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Release : 1997-01-01
Genre : Design
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Book Rating : 596/5 ( reviews)

Multidisciplinary Design Optimization - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Multidisciplinary Design Optimization write by Natalia M. Alexandrov. This book was released on 1997-01-01. Multidisciplinary Design Optimization available in PDF, EPUB and Kindle. 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.

Multidisciplinary Design Optimization in Computational Mechanics

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Release : 2013-02-04
Genre : Technology & Engineering
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Book Rating : 002/5 ( reviews)

Multidisciplinary Design Optimization in Computational Mechanics - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Multidisciplinary Design Optimization in Computational Mechanics write by Piotr Breitkopf. This book was released on 2013-02-04. Multidisciplinary Design Optimization in Computational Mechanics available in PDF, EPUB and Kindle. 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.

Metamodel-based Design Optimization

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Release : 2013
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Book Rating : 210/5 ( reviews)

Metamodel-based Design Optimization - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Metamodel-based Design Optimization write by . This book was released on 2013. Metamodel-based Design Optimization available in PDF, EPUB and Kindle.