• CN:11-2187/TH
  • ISSN:0577-6686

›› 1983, Vol. 19 ›› Issue (3): 32-42.

• 论文 • 上一篇    下一篇

由冲击响应求解振动特性的方法及在机床上的应用

王信义;佐藤寿芳;大堀真敬   

  1. 北京工业学院;日本东京大学
  • 发布日期:1983-06-01

METHOD FOR THE IDENTIFICATION OF VIBRATION CHARACTERISTICS USING IMPULSE RESPONSES AND ITS APPLICATION TO THE MACHINE TOOL STRUCTURE

Wang Xinyi;Sato HisaYoshi;Qhori Masanori   

  1. Beijing Institute of Technology Tokyo University
  • Published:1983-06-01

摘要: 本文对由冲击响应求得的频响函数提出了三种曲线拟合,求解模态参数的方法即,误差最小二乘法,三点对比法和裾部影响消除法。这些方法和以前应用的方法比较,能够对多数自由度(40~50)系统的频响函数进行曲线拟合;求解出的固有频率和上正弦激振法求得的结果是一致的。第三种方法可以大大缩短计算时间。

Abstract: The new curve fit procedures to frequency response obtained by Fourier transform of the impulse response are proposed. These procedures are the methods called in the papers MSSE (the Minimization of Sum of Square of Error due to the fitting), COLP (the Comparison of the data and the analysis at the Least Points for the identification), ELEF (the Evaluation of Lobe Effect from other degrees or Freedom system). Application of these to an engine lathe structure revealed that plural single degrees of freedom system existing closely each other can be separated. It turns out that the curve fit procedures of this kind is applicable as well to higher degrees of freedom system than ever been made. The natural frequencies thus obtained agree pretty good with those by frequency response method, and these procedures work stably even for the case of 40 or 50 degrees of freedom system. The computer time can significantly be reduced as the result of employing the method ELEF.