时域工况传递路径分析方法  

Analysis method of time domain operating conditions transfer path

作　　者：吕来 唐中华[1] 张志飞[1] 贺岩松[1] 翟克宁 L Lai;TANG Zhonghua;ZHANG Zhifei;HE Yansong;ZHAI Kening(College of Mechanical and Vehicle Engineering,Chongqing University,Chongqing 400030,China;Dongfeng Liuzhou Motor Co.,Ltd.,Liuzhou 545005,China)

机构地区：[1]重庆大学机械与运载工程学院,重庆400030 [2]东风柳州汽车有限公司,广西柳州545005

出　　处：《振动与冲击》2023年第15期92-100,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金(51875060)。

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试验进行检验,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。Here,aiming at the demand for transfer path analysis of vibration and noise under unsteady operating conditions,the frequency domain transfer path analysis method was extended to time domain,and the path decomposition was realized using time domain operating conditions data of indicator point and target one,thus a time domain transfer path analysis method was proposed.The convolution relation between time domain operating condition data of target point and indicator point was established using the time domain transmissibility function,and it was discretized and expressed in the form of a matrix equation.Then,the matrix equation was solved using Tikhonov regularization,i.e.,the time domain transmissibility function could be calculated using time domain response data of target point and indicator one under different operating conditions to do decomposition and prediction of vibration and noise.The results of a 9DOF lumped mass model simulation and a simple vehicle body frame model tests showed that the proposed method can have better accuracy,accurately perform time domain transfer path analysis,and accurately predict target points’responses under unsteady operating conditions.

关 键 词：振动噪声 传递路径分析 TIKHONOV正则化 时域响应 非稳态工况 

分 类 号：TH128[机械工程—机械设计及理论] TB535[理学—物理]