Lightweight Optimization Design of Automobile Exhaust System Based on the Surrogate Model
Aiming at the lightweight problem in automobile exhaust system,a lightweight optimization design method for ex-haust system is proposed based on the surrogate model.Taking an automobile as example,a FE model of exhaust system was built and its accuracy was verified by comparing the result of modal test.Based on the FE model,combined with the Latin hypercube sampling method,a quadratic polynomial surrogate model of the weight and performance was established.Taking the total mass as the target,considering the system mode,muffler shell mode,structural strength and the uncertainty of the design variables,a lightweight optimization design model was built.The best optimization result was gained by firefly algorithm and it was verified by FEA.Using this method,under the premise of ensuring the performance of exhaust system,the weight reduction rate of the ex-haust system reached22.6％,which has certain reference significance for the lightening work of subsequent projects.
NETL
NSTL
万方数据
维普
