用边界单元法识别梁的弹性支承刚度

IDENTIFICATION OF BEAM SUPPORTER STIFFNESS BY BOUNDARY ELEMENT METHOD

本文以多跨梁为例提出了一种识别梁的弹性支承刚度的边界单元法。从梁的边界积分方程出发直接建立了梁的边界参数与其域内点的动力响应之间的关系式。由此根据动态测试得到的梁上少数点的动力响应信息可方便地识别出梁的边界动力参数,为结构边界参数的识别提供了一个简便有效的方法。

An identification method to estimate the elastic pedestal stiffness of multi-spanned beams is offered in this paper, which is based on the linking method of BEM and dynamic response measurement!. The relations between the boundary parameters and the dynamic response at points of the structure interior are established in the light of the boundary integral equation. By the use of the dynamic response measured at some points on the beam the supporter stiffness can be conveniently identified. The effectiveness and accuracy of the method are verified by computer simulation.