It shows through theory and computor simulation that the changes of some frequencies and mode shapes caused by beam damage are not evident, the changes of curvature mode shapes are obvious.

• 仿真结果表明，破损对某些阶频率、振型的影响不大，对振型曲率的影响较大．用振型曲率监测简支梁的破损优于用频率或振型的监测方法。