1.School of Automotive Engineering, Changzhou Institute of Technology, Changzhou 213032, China;
2.College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Frequency response functions (FRFs) related to coupling points usually need to be measured in the vibration analysis of multi-point coupled systems.Because of the inaccessible property of coupling points, the measurement of this kind of FRF is often very difficult.Aiming at this, detailed analyses and discussions were made in the paper.A complete strategy for measuring the FRFs related to coupling points was proposed.According to whether the excitation point and the response point are coupling points or not, the FRFs related to coupling points were divided into three types: (Ⅰ)The response point belongs to the coupling points.(Ⅱ)The excitation point belongs to the coupling points.(Ⅲ)Both the response point and the excitation point belong to the coupled points.First, the testing strategies of Class I FRFs and Class II FRFs were proposed.Then, according to the Norton Theorem in mechanical systems, it was proved that the Class III FRFs could be expressed as Class I and Class II FRFs.The correctness of the proposed method was verified by a numerical model and an experiment.
廖旭晖1,2，李舜酩2，戴旭东1，赵景波1. 多点耦合系统中与耦合点有关的频响函数测量[J]. 振动与冲击, 2020, 39(22): 76-81.
LIAO Xuhui1,2，LI Shunming2，DAI Xudong1，ZHAO Jingbo1. Measurement of frequency response functions related to coupling points in multipoint coupled systems. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(22): 76-81.
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