EHTC 2009

Early stage design optimization of an automotive crankshaft

P. du Cauze de Nazelle, LMT–ENS Cachan; A. Hähnel, Renault

The crankshaft is one of the most important parts of an automotive engine. Its design is constrained by a collection of multidisciplinary criteria such as fatigue life, NVH behavior, mechanical friction, manufacturing process … We propose a multi-objective optimization scheme that aims at defining an optimal concept in the early design stages. It relies on in-house codes and OptiStruct topology and freeshape optimization technology to reduce weight and mechanical friction loss (direct impact on CO2 emissions) while guaranteeing up to standard behavior with respect to fatigue life and NVH criteria.


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