Analysis method of time domain operating conditions transfer path
L Lai1, TANG Zhonghua1, ZHANG Zhifei1, HE Yansong1, ZHAI Kening2
1.College of Mechanical and Vehicle Engineering, Chongqing University, Chongqing 400030, China;
2.Dongfeng Liuzhou Motor Co., Ltd., Liuzhou 545005, China
Abstract:Aiming at the operational path analysis requirements of vibration and noise under unsteady state conditions, the frequency domain operational path analysis method is generalized to the time domain, and the time domain operational conditions data of the indicator point and the target point are used to realize the path decomposition, and the time domain operational path analysis method is proposed. The time domain transfer rate function is used to establish the convolutional relationship between the target point and the indicator point time domain condition data, and discretize it in the form of matrix equation, and then use Tikhonov regularization solution to calculate the time domain transfer rate function by using the time domain response data of the target point and the indicator point under different working conditions, which can decompose and predict vibration noise. Through the simulation of the nine-degree-of-freedom centralized mass block model and the simple car skeleton model experiment, the results show that the proposed method has good accuracy, can accurately analyze the time domain transfer path, and can accurately predict the response of the target point under unsteady state conditions.
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