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某型复杂变速器壳体的模态研究
引用本文:王文平,项昌乐. 某型复杂变速器壳体的模态研究[J]. 汽车工程, 2007, 29(8): 673-676
作者姓名:王文平  项昌乐
作者单位:北京经纬恒润科技有限公司,北京,100101;北京理工大学,车辆传动国家重点实验室,北京,100081
摘    要:
首先分析了工作模态法的优点及其所用的随机子空间法理论;然后应用工作模态法对某型变速器复杂壳体的模态进行实验辨识,得到了壳体各阶的模态频率和振型。并利用有限元软件MSC.Patran和MSC.Nastran对壳体模态进行数值计算,通过实验模态和数值计算模态的对比,发现在低频段实验结果与数值计算结果较吻合,说明采用工作模态法能较精确地识别出壳体的低阶模态。

关 键 词:变速器壳体  工作模态法  参数识别  数值计算

Modal Analysis of a Complicated Gearbox Housing
Wang Wenping,Xiang Changle. Modal Analysis of a Complicated Gearbox Housing[J]. Automotive Engineering, 2007, 29(8): 673-676
Authors:Wang Wenping  Xiang Changle
Affiliation:1. Beqing Jingwei Hirain Technology Co. , Ltd. , Beijing 100101 ; 2. Beijing Institute of Technology, National Key Laboratory of Vehicle Transmission, Beijing
Abstract:
The in-operation modal analysis and the theory of stochastic subspace identification are discussed.Using in-operation modal analysis method,the modal identification for a complex gearbox housing is conducted by experiment.Forty-four modes are identified with their modal frequencies and mode shapes obtained.A corresponding numerical calculation is also performed with finite element codes MSC.Nastran and MSC.Patran.The comparison of results shows that the numerical calculation results are closer to the experimental ones in low frequency range.This means that using in-operation modal analysis can identify the low-order vibration modes of gearbox housing more accurately.
Keywords:Gearbox housing  In-operation modal analysis  Parameter identification  Numerical calculation
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