复模态与虚拟激励下的汽车随机振动分析  

Random vibration analysis of trucks based on complex mode and pseudo excitation

作　　者：秦玉英[1] 陈湦林 涂俊波 赵庆宇[1] 

机构地区：[1]辽宁工业大学汽车与交通工程学院,锦州121000

出　　处：《现代制造工程》2015年第7期61-65,共5页Modern Manufacturing Engineering

基　　金：国家自然科学基金项目(51205191);汽车仿真与控制国家重点实验室开放基金项目(20111117);辽宁工业大学校基金资助项目(X201206)

摘　　要：基于复模态理论和虚拟激励相结合的方法,在汽车随机振动分析方面应用很少,应用复模态理论给出振动结构在复谐激励下的响应,由虚拟激励法构造具有复谐激励特点的路面虚拟激励。以载货汽车七自由度模型为研究对象,联合复模态理论和虚拟激励法,由汽车虚拟振动响应量给出真实振动响应量的统计特性。结果表明,联合复模态理论和虚拟激励法进行汽车随机振动分析,方法简单可行,为汽车随机振动的进一步研究提供了理论依据。Because the combination of complex mode theories and pseudo excitation method has been seldom applied in analysis of vehicle random vibration,responses of vibration structures are given by complex simple harmonic excitation based on complex mode theories, road pseudo excitations are constructed by pseudo excitation method which have the characteristics of complex sim- ple harmonic excitation. Seven - degree of freedom model of a truck is taken as an example, complex mode theories and pseudo excitation are combined, statistical characteristics of real vibration responses are given by pseudo vibration responses. Results have shown that the combination of complex mode theories and pseudo excitation is easy for analysis of vehicle random vibration, foun- dation of further study has been established with the combination for vehicle random vibration.

关 键 词：随机振动 复模态分析 虚拟激励 功率谱密度 复谐激励 

分 类 号：U461.4[机械工程—车辆工程]