敏感度分析修正结构动力学模型  

Structural Dynamics Modification via Sensitivity Analysis

作　　者：陈丽薇[1] 黄芬[2] 

机构地区：[1]中国计量学院 [2]航空航天工业部707研究所

出　　处：《哈尔滨船舶工程学院学报》1992年第2期232-239,共8页

摘　　要：探讨用敏感度分析修正结构动力学模型的问题,在获得了结构初始的理论模型及实测的动力特性后,通过对结构的敏感度分析可以找出参数改变最敏感的位置和方向,也可确定最佳的修正量,从而可迅速、准确、有效地对理论模型进行修正以获得较符合实际的动力学模型。文中还简述了求结构模态参数敏感度的方法。经过离散结构的计算表明此法的可行性和有效性。The structural dynamics modification by means of sensitivity analysis is investigated.After initial analytical model of structural dynamics and test dynamic characteristics are obtained ,the most sensitive location and direction of the change of structural parameter to physical parameter. Thus the optimal quantities of modification can also be calculated.Therefore the analytical model can be more efficiently modified.The dynamic characteristics of analytical model can coincide with the test results.In this paper the methods of calculating sensitivity are briefly discussed and a four degree-of-freedom spring-mass system is used for numerical simulation. It shows this approach is effective and useful.

关 键 词：结构敏感分析 模态参数 动力模型 

分 类 号：O342[理学—固体力学]