An improved transfer path analysis method based on structural dynamic modification technique

作者：Xu, Tie; Wang, Zengwei; Liao, Yi; Chen, Danhua; Qin, Zhiwei; Zhu, Ping

来源：Journal of Vibration and Shock, 2019, 38(5): 222-228.

DOI：10.13465/j.cnki.jvs.2019.05.032

• Frequency response functions
• Response prediction
• Structural modifications
• Transfer Path Analysis
• Vehicle body

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 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.

• 出版日期2019
• 单位上海交通大学