基于结构动力学修改技术的传递路径分析方法

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摘要针对传统传递路径分析（TPA）方法的局限性，提出一种基于结构动力学修改技术的传递路径分析方法。该方法通过系统频响函数预测被动部件频响函数，结合工况数据识别耦合力，实现路径贡献量分析。采用数值案例对该方法进行演示，验证其理论的正确性。针对轿车车身振动问题进行应用研究，选取发动机悬置安装点加速度和车内底板处加速度作为振动传递分析的研究对象。结果表明，该方法预测的被动部件频响函数与试验测试值吻合，可以在不拆分系统的情况下得到与传统TPA精度相仿的分析结果，验证了方法的工程可行性和应用简便性，为开展轿车车身NVH性能分析提供可借鉴的新方法和途径。

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	徐铁 1
	王增伟 2
	3
	廖毅 1
	陈丹华 1
	覃智威 2
	3
	朱平 2
	3

关键词 ：传递路径分析, 结构修改, 车身振动, 频响函数, 响应预测

Abstract：In order to overcome limitations of the traditional transfer path analysis (TPA) method, a novel TPA method based on structural dynamic modification technique was proposed. With this method, the system’s frequency response function (FRF) was used to estimate FRFs of passive parts, to identify coupling force using operational response data and to realize the path contribution analysis. A numerical example was employed for the purpose of demo of this method, and the correctness of its theory was verified. Finally, the method was used to study a vehicle body vibration problem. Its engine mounting point’s acceleration and its inside floor’s acceleration were taken as study objects for vibration transfer path analysis. The results showed that FRFs of passive parts predicted using this method agree well with those of test measurements; the analysis results with a similar accuracy to that of traditional TPA are obtained without splitting the system; the engineering feasibility and application simplicity of the proposed method are verified; the results provide a new way for NVH performance analysis of vehicle bodies.

Key words： transfer path analysis structural modifications vehicle body vibration frequency response function response prediction

收稿日期: 2017-07-04 出版日期: 2019-02-28

引用本文:

徐铁 1,王增伟 2，3，廖毅 1,陈丹华 1,覃智威 2，3，朱平 2，3. 基于结构动力学修改技术的传递路径分析方法[J]. 振动与冲击, 2019, 38(5): 222-228.
XU Tie1,WANG Zengwei2,3,LIAO Yi1,CHEN Danhua1,QIN Zhiwei2,3,ZHU Ping2,3. An improved transfer path analysis method based on structural dynamic modification technique. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(5): 222-228.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2019/V38/I5/222

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