期刊论文

Modeling and optimization method of dynamic stiffness for automotive exhaust system hangers

Shangguan, W.-B.

中文

振动与冲击

Zhendong yu Chongji/Journal of Vibration and Shock

1000-3835

2010

29

1

100-102+152

10.3969/j.issn.1000-3835.2010.01.021

国家自然科学基金(50575073)资助项目；

本校为其他机构

基于汽车排气系统吊耳传递的动态载荷最小、吊耳耐疲劳性最好,建立了考虑动力总成在内的排气系统振动分析模型。进行了排气系统的自由模态和约束模态的测试,并和计算值进行了对比分析,证明了所建立的排气系统振动模型的正确性。以吊耳的垂向动态载荷最小和其静变形量在一定范围内为优化目标,建立了排气系统吊耳动刚度优化模型。优化后,在怠速工况和2档全负荷加速工况下对车身底板驾驶员位置进行了振动响应测试,测试结果表明,利用优化后的吊耳刚度,能够有效降低车身底板的振动加速度,表明了阐述的排气系统建模和吊耳动刚度优化方法的有效性。文中建模与优化方法,对排气系统的吊耳动刚度计算与优化...

In order to minimize the dynamic load transmitted from exhaust system hangers to a car body and enhance hangers against fatigue, a vibration analysis model for an exhaust system and a powertrain was established. The natural frequencies and modal-shapes were calculated and compared with those of the experiments under conditions of free-free boundary and constraint boundary, the results validated the proposed model. Through minimizing the dynamic load in vertical direction transmitted from hangers to a car body, and restricting the static displacement of isolators within a certain range, a model...