柴油车车身的动态修改设计

Dynamic Modification of Diesel Car Body

运用试验模态分析方法和有限元法 ,对试装柴油发动机的国产微型汽车进行了模态分析 ,把两种分析方法所得的模态参数进行比较 ,经确认或修改 ,便可建立一种比较精确的动态设计模型。在相似性估计的准则上 ,提出了一种频率对比的新方法 ,对车身的局部振动进行修改并得到较为合理的结构。

In this paper, experimental modal analysis and dynamic finite element analysis were used in modal analysis of a domestic mini car with diesel engine. The model was modified through analysis of model parameters obtained in the two ways and then a precise dynamic design model was established. A new method of frequency comparison was presented on the standard of resemblance. The partial vibration and inherent vibration shape were modified, and a rational structure was obtained.