基于曲率模态的直接损伤定位

在桥梁检测损伤的过程中，针对比较微小的损伤，以往需要完好梁的数据，但是桥梁损伤前的数据难以寻找。本文用Ansys模拟了具有一定代表性的工字钢梁，分多种工况，提取其轴线Y方向上不同损伤情况下的曲率模态，用差分运算进行处理，并对差分曲线进行了详细的讨论，数值模拟结果表明，经过差分运算的模态数据可以准确的反映损伤位置，为进一步的直接损伤判定奠定基础。

Direct Damage Location Based on the Curvature Mode

In the process of detecting but that data is difficult to find. Ansys damage of bridges, for minor damage, intact beam data is often needed, was adpopted to simulate the steel i-beam, in a variety of conditions, extract the axis curvature modal on the y direction. Difference operation was used for processing. Numerical simulation results show that ： Through differential operation of modal data can be accurate reflection of the damage position.