Crack detection for structure based on the dynamic stiffness model and the inverse problem of vibration
Crack detection for structure based on the dynamic stiffness model and the inverse problem of vibration
复制标题
基于动刚度模型和振动反问题的结构裂纹检测
DOI：
10.1080/17415970500272908
复制
发表时间：
2006
影响因子：
1.3
通讯作者：
N. T. Khiem
中科院分区：
文献类型：
--
作者：
N. T. Khiem
结构裂缝检测是工程中的一个重要而又困难的问题。本文研究的是利用结构的动力特性进行裂纹检测的问题。首先，建立了含多裂纹三维梁单元的框架结构动力刚度模型，作为分析含裂纹构件的框架结构的基本工具。然后，将基于传导模型的结构裂缝检测问题转化为参数估计问题，并用非线性规划方法进行求解。一些数值结果证明了理论的正确性。
Detecting cracks in structures is a problem of great importance and difficulty in engineering. This work concerns the problem of crack detection for structure using its dynamical characteristics. First, a dynamic stiffness model of framed structure with multi-cracked 3D beam elements has been conducted as a basic instrument for analysis of framed structure with cracked members. Then, the crack detection problem for structures based on the conducted model is formulated in the form of a parameter estimation problem and solved by using the nonlinear programming method. The theory has been illustrated by some numerical results.