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Structural optimization of base engine component

Structural optimization of base engine component

Johan Sparlund
Göteborg : Chalmers tekniska högskola, 2017. Diploma work - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden, ISSN 1652-8557; 2017:36, 2017.
[Examensarbete på avancerad nivå]

The purpose of this thesis has been to investigate the potential implementation of structural optimization software in the product development process at the department of engine development at Volvo Car Corporation. This has been carried out by performing two trial cases of optimization on two different base engine components. The models have been created in ANSA and solved with ABAQUS and TOSCA. The first trial case was of a simpler nature and involved a smaller component inside the bedplate. Its purpose was mainly to bring knowledge about FE-modelling and optimization, which it fulfilled. The second trial case was more complex, and aimed to find the optimal material distribution on the engine block’s exterior surface in order to increase the first eigenfrequency of the component. It succeeded in the sense that it increased the eigenfrequency, but the optimized topology does not contain rib-like structures to a large extent, as was hoped. Rather, the majority of the element are spread thinly over the entire surface. The ultimate conclusion that can be drawn from the results is that it is complicated to implement the use of structural optimization software on larger base engine components. Optimization is better suited for more isolated components of smaller size, with a limited number of load cases that are clearly defined. This would give the optimization solver a better chance to find an improved structure. It would also limit the need for simplifications and therefore allow for greater confidence in the FE-model and in turn the optimization results. The findings in this thesis does not completely reject the potential implementation of structural optimization software in the product development phase, but does show that structural optimization is not without its flaws and limitations.



Publikationen registrerades 2017-07-03. Den ändrades senast 2017-07-03

CPL ID: 250339

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