Metamodel-Based Multidisciplinary Design Optimization for Automotive Applications
2012 (English)Report (Other academic)
When designing a complex product, many groups are concurrently developing different parts or aspects of the product using detailed simulation models. Multidisciplinary design optimization (MDO) has its roots within the aerospace industry and can effectively improve designs through simultaneously considering different aspects of the product. The groups involved in MDO need to work autonomously and in parallel, which influence the choice of MDO method. The methods can be divided into single-level methods that have a central optimizer making all design decisions, and multi-level methods that have a distributed decision process.
This report is a comprehensive summary of the field of MDO with special focus on structural optimization for automotive applications using metamodels. Metamodels are simplified models of the computationally expensive detailed simulation models and can be used to relieve some of the computational burden during MDO studies. The report covers metamodel-based design optimization including design of experiments, variable screening, metamodels and their validation, as well as optimization methods. It also includes descriptions of several MDO methods, along with a comparison between the aerospace and automotive industries and their applications of MDO.
The information in this report is based on an extensive literature survey, but the conclusions drawn are influenced by the authors’ own experiences from the automotive industry. The trend goes towards using advanced metamodels and global optimization methods for the considered applications. Further on, many of the MDO methods developed for the aerospace industry are unsuitable for the automotive industry where the disciplines are more loosely coupled. The expense of using multi-level optimization methods is then greater than the benefits, and the authors therefore recommend single-level methods for most automotive applications.
Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2012. , 122 p.
multidisciplinary design optimization (MDO), metamodel-based design optimization (MBDO), single-level optimization methods, multi-level optimization methods, automotive industry
IdentifiersURN: urn:nbn:se:liu:diva-84701ISRN: LIU-IEI-R-12/003OAI: oai:DiVA.org:liu-84701DiVA: diva2:561583
Forskningsfinansiär:ProViking genom Stiftelsen för strategisk forskning; ProViking through the Swedish foundation for strategic research2012-10-222012-10-172012-10-22Bibliographically approved