Transfer path analysis method based on the absolute transmissibility function
HUANG Yingjie1，WANG Tong1，GUO Jianqiang2
1. State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China；
2. CRRC Qingdao Sifang Co., LTD, Qingdao 266111, China
Complicated procedures for load identification are generally required in the traditional transfer path analysis (TPA). To improve the efficiency of modeling and experiment, the advanced transfer path analysis method based on the transfer function has been put forward. In the paper, an improved method based on the advanced transfer path analysis, named as NTPA, was proposed. A normalization procedure was applied to calculate the absolute transmissibility functions in order to reduce the illconditioned problem. Also the principal component analysis (PCA) in frequency domain was used to calculate and estimate the contribution rank of each subsystem. A four degrees of freedom springmass model was utilized to validate the NTPA method, and then the model was updated according to the contribution analysis results. The new method was also applied to the transfer path analysis test of a famous plane model. The NTPA method shows its good performance in both the precision and test time.
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