基于环境振动测试的润扬桥塔模型修正

桥塔是决定大跨度桥梁结构动力特性的重要部分之一,系统而深入地认识桥塔的动力特性是十分重要的。本文采用环境激励振动测试的方法对润扬桥塔的振动特性进行了测试,识别了其重要的模态参数。为了更深入地了解桥塔的力学性质,建立了桥塔的空间结构模型,依据最小秩方法(MROU),对结构模型进行了修正,识别出桥塔中重要的力学参数。修正后的模型为进一步模拟仿真分析大型桥塔在恶劣环境下的动态响应提供基础。

Model Updating of Runyang Bridge Tower Via Ambient Vibration Test

Considering its significant effect on the modal property of large scale bridge , it is important to study dynamic mechanical property of large bridge tower thoroughly. Ambient vibration method is presented to carry out the bridge tower modal property test and, its important modal parameters are also identified. The spatial structural model of bridge tower is established and updated via minimum rank theory to understand the large bridge tower mechanical behaviors deeply. The updated model provides a basis for simulating dynamic responses of bridge tower under execrable conditions.