基于曲率模态法的简支板桥损伤识别研究

探讨了曲率模态用于简支板桥损伤识别的可行性。首先介绍了曲率模态法用于损伤识别的理论基础,随后利用三维有限元模型模拟结构损伤,并用曲率模态方法对其进行了有效识别。根据有限元仿真结果,可以得出如下结论:曲率模态对结构的局部变化非常敏感,对于简支板桥当对其中一块板的损伤状况进行识别时,不会受其他板的干扰,即使是与之毗邻的板也不会对其产生影响。

DAMAGE IDENTIFICATION OF SIMPLY SUPPORTED BOARD BRIDGE BASED ON CURVATURE MODE

It is investigated the feasibility of damage identification of simply supported board bridge using curvature mode method.The theory of damage identification based on curvature mode is introduced at the first.The damage has been simulated using the 3D finite element analysis,and identified effectively using curvature mode method.The conclusion is deduced that it is very sensitive to the local change of the structure.When it is used to locate the damage of one of the board of the simply supported board bridge,it can′t be disturbed by other boards include the nearest board(s).