空间框架结构裂纹位置识别的模态应变能法

Modal strain energy method for detection of crack location in frame structures

提出了空间结构裂纹位置识别的模态应变能法 .该方法将单元模态应变能分解为拉压、扭转和弯曲模态应变能 ,利用单元的主要模态应变能分量与结构固有频率的改变量对结构裂纹位置进行识别 .数值实验分析表明 。

A modal strain energy method to identify crack location in frame structures is presented.In the method the modal strain energy of an element is divided into tension modal strain energy,torsion modal strain energy and bending modal strain energy.Dominant modal strain energy and variations of natural frequencies are used to detect the crack position.A simulated framework example shows that the method can detect crack location with satisfactory precision.