A methodology was put forward for damage location, and damage simulating as well as numerical calculation of modal analysis was carried out on a truss plane bridge by stiffness discount.

• 摘要推导了基于测试频率平方变化比的损伤定位方法，利用有限元方法对一管道结构以刚度折减法进行了损伤模拟和模态分析数值计算。