高速铁路大跨度钢管混凝土拱桥车桥耦合振动仿真分析

以鸭池河桥为工程背景,建立车-桥系统耦合振动分析的数值仿真模型。利用大型通用有限元软件ANSYS建立桥梁的动力分析模型,并计算其空自振特性。通过多体动力学软件SIMPACK对于CRH3动车组模型进行高精度仿真,结合SIMPACK软件和ANSYS软件,建立车桥耦合振动仿真系统,输入轨道不平顺和轮轨关系进行车桥耦合振动计算。车桥耦合振动分析结果表明:桥梁具有足够的刚度,振动状态良好;车辆运行安全性可以得到保障,舒适性指标为"优良"。该桥的车桥耦合振动计算结果为今后类似桥梁设计提供了借鉴,同时也验证了联合仿真的可行性和便利性。

Coupled Vibration Analysis of Vehicle-Bridge System for Long-Span Concrete Filled Steel Tube Arch Bridge on High Speed Railway

The numerical simulation model to analyze the coupled vibration between vehicle and bridge is established on the engineering background of Yachi River Bridge. The finite element commercial software ANSYS is employed to set up the dynamic analysis model and to compute its natural vibration characteristics. Specific CRH3 model is simulated with multi-body dynamics software SIMPACK. With ANSYS and SIMPACK software,the vehicle bridge coupled vibration simulation system is created and the vehicle bridge coupled vibration is calculated with the input of track-rail irregularity and wheel-rail relation. The analysis results show that the bridge has sufficient stiffness and satisfactory vibration performance,and the train operation safety is guaranteed with stimulated riding comfort. All the calculation results not only provide references for future design of similar bridges but also verify the feasibility and convenience of joint simulation.