时域工况传递路径分析方法

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (15) : 92-100.

论文

时域工况传递路径分析方法

吕来1，唐中华1,张志飞1,贺岩松1，翟克宁2

作者信息 +

Analysis method of time domain operating conditions transfer path

L Lai1, TANG Zhonghua1, ZHANG Zhifei1, HE Yansong1, ZHAI Kening2

Author information +

文章历史 +

摘要

针对非稳态工况振动噪声的传递路径分析需求，将频域工况传递路径分析方法推广到时域，利用指示点和目标点的时域工况数据实现路径分解，提出了时域工况传递路径分析方法。利用时域传递率函数建立了目标点与指示点时域工况数据的卷积关系，并将其离散化后以矩阵方程的形式表示，然后采用Tikhonov正则化求解，即可利用不同工况下目标点和指示点的时域响应数据计算出时域传递率函数，能进行振动噪声的分解和预测。通过九自由度集中质量块模型仿真与简易车身骨架模型实验进行检验，结果表明所提出的方法具有较好的精度，可以准确地进行时域传递路径分析，并能准确预测目标点在非稳态工况下的响应。

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.

导出引用

吕来1，唐中华1,张志飞1,贺岩松1，翟克宁2. 时域工况传递路径分析方法[J]. 振动与冲击, 2023, 42(15): 92-100

L Lai1, TANG Zhonghua1, ZHANG Zhifei1, HE Yansong1, ZHAI Kening2. Analysis method of time domain operating conditions transfer path[J]. Journal of Vibration and Shock, 2023, 42(15): 92-100

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