皮卡车排气系统模态优化方法研究

摘要

排气系统模态的合理布置是一个重要的NVH指标，应用ADDOFD方法确定排气系统平均位移较小的点作为挂钩位置，在此基础上应用正交设计方法对吊耳及波纹管刚度进行优化，使其频率与怠速频率有效分离。%It is an important target that the reasonable arrangement of exhaust system's mode. Hanger locations are recommended at the position wheretheADDOFDisrelativelylower.AndbasedonthestiffnessofhangerandbellowsisimprovedbyOrthogonalexperimentaldesign,Inorderthatits frequencyisseparatedfromidlefrequency.