斜拉桥模态测试与试验技术研究

Research on modal testing and testing technology of cable-stayed bridge

通过介绍脉动测试原理引出环境激励法间接识别大跨径结构模态参数的方法。讲述斜拉桥动力特性及其理论分析,运用子空间迭代法对桥梁结构进行动力特性分析。结合工程实例,分析实测数据与理论计算结果,发现有限元软件对大跨径斜拉桥进行模态分析的适用性,验证了环境激励法识别固有模态参数的可行性。

By introducing the principle of pulsation testing.A method for indirect identification of modal parameters of large-span structures by environmental excitation method.Describe the dynamic characteristics and theoretical analysis of cable-stayed bridges.Dynamic characteristic analysis of bridge structure using subspace iteration method.Combined with engineering examples.Analyze measured data and theoretical calculation results.Discovering the suitability of finite element software for modal analysis of long-span cable-stayed bridges.It verifies the feasibility of the environmental excitation method to identify the intrinsic modal parameters.