摘要
本文提出一种建立有阻尼振动系统动态聚缩模型的方法。该方法基于聚缩前后，系统保留自由度激振与响应保持不变的原则，利用频响函数和最小二乘法，求解聚缩系统的结构物理参数。其特点是，既可用于实模态系统，又可用于复模态系统，同时还能满足多阶模态分析精度的要求。
In this paper,a method of dynamic condensation is put forward,which can beused in complex modes with damped oscillation system. Based on the principle that the dynamic characteristics are not changed before and after condensation,this method uses FRFand Least-squares Fit to solve the structure physical parameters of condensation modes. Thismethod can be used either in complex modes or in real modes,and it can also fulfill the accuracy requirements of the multiple modal analysis.
出处
《铁道学报》
EI
CSCD
北大核心
1995年第2期33-36,共4页
Journal of the China Railway Society
关键词
频响函数
复模态
动态聚缩
最小二乘法
阻尼振动
frequency response function(FRF)
complex modes
dynamic condensation
least-squares fit
