【摘要】 建立简化的汀九斜拉桥有限元模型 (FEM) ,计算该桥的动力特性 ,利用完备模态应变能法 (CMSE)进行该桥的损伤诊断数值仿真试验。结果表明简化的汀九斜拉桥 FEM能够反映真实结构的动力特性 :完备模态应变能法适用于低频密频的大跨度斜拉桥、悬索桥等柔性结构 ,并且只需少量低阶模态即可保证结构损伤诊断精度更多还原

【Abstract】 A simple FEM of Ting Kau cable-stayed bridge is built,its dynamic characterizes are analyzed and many simulated damage cases in the FEM are investigated by using a structural damage detection method,CMSE,proposed by author.Results indicate that the dynamic characterizes of the simple FEM are similar to those of Ting Kau cable-stayed bridge and CMSE is the same with flexible structures with low and intense frequencies such as long-span cable-stayed bridge and has satisfying precision in damage detection only using a few low modes.更多还原