结构分析模型的修正与振型扩充技术  

Structural Analytical Model Updating and Mode Shape Expansion Techniques

作　　者：汪晓虹[1] 周传荣[1] 徐庆华[1] 

机构地区：[1]南京航空航天大学,南京210016

出　　处：《东南大学学报（自然科学版）》2000年第2期143-147,共5页Journal of Southeast University：Natural Science Edition

摘　　要：在利用实测的结构动态特性修正结构分析模型中 ,针对实测低阶固有频率 ,固有振型含有测量误差 ,造成结构特征方程不适定性的问题 ,以及实测振型的坐标数比分析模型指定的坐标数少的问题 ,本文给出了直接利用结构的特征方程 ,修改结构分析模型和振型扩充的方法 .通过实例对方法的可靠性。In accordance with these problems that the structural natural frequencies and modes from vibration test data involves errors, and the number of measured modes coordinates is less than the number of degrees of freedom specified in the analytical model. In this paper, the methods of the correcting analytical model and the expanding mode shape are presented which uses measured normal modes and natural frequencies to update the design variables from the structural eigenequation. Numerical results are given to illustrate the arguments developed.

关 键 词：结构分析模型 固有频率 振型 振型扩充 最优化方法 

分 类 号：O327[理学—一般力学与力学基础]