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运用动态子结构固定界面模态综合法,结合Ansys有限元分析软件建立隧道-土层-建筑物系统动力学分析模型,通过与有限元整体建模分析法进行比较,验证了动态子结构法的准确性,对比分析系统的振动特性,分析隧道埋深、桩基深度对建筑物振动的影响。分析结果表明:隧道上方的建筑物桩基不利于建筑物减振,增加隧道埋深、增加隧道与建筑物桩尖的距离,可以有效降低建筑物振动。固定界面模态综合法具有较高的精度,计算效率高,在地铁列车引起建筑物振动分析中具有较好的适用性。
By using dynamic substructure fixed interface modal synthesis method and Ansys finite element analysis software, the dynamic model of tunnel-soil-building system is established and compared with the overall modeling and analysis of finite element method. The dynamic substructure method Accuracy, comparative analysis of the vibration characteristics of the system, analysis of tunnel depth, pile depth on the impact of building vibration. The analysis results show that the pile foundation of the building above the tunnel is not conducive to the building vibration reduction, increase the tunnel depth and increase the distance between the tunnel and the pile tip, which can effectively reduce the vibration of the building. The fixed interface modal synthesis method has high precision and high computational efficiency, and has good applicability in building vibration analysis caused by subway trains.