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基于车辆—轨道耦合动力学理论,建立车辆—轨道垂向耦合模型,轨枕采用有限元梁模型。在轮对扁疤初速度激励模型和位移激励模型下,计算车辆轨道系统的振动响应,并与轨枕集中质量模型仿真结果进行比较。结果表明,轨枕模型的选取对轮轨力影响较小,但轨枕有限元梁模型可以反映沿轨枕长度方向在不同时刻的振动响应,而且计算出轨枕振动的速度分布可为轨道系统辐射噪声计算提供振动数据。
Based on the theory of vehicle-rail coupling dynamics, a vehicle-rail vertical coupling model is established, and the sleeper adopts finite element beam model. The vibration response of the vehicle’s orbit system is calculated under the initial speed excitation model and the displacement excitation model of the wheel-pair bum, and compared with the simulation results of the sleeper-centered mass model. The results show that the sleeper model has little influence on the wheel-rail force, but the finite element beam model of the sleeper can reflect the vibration response along the length of the sleeper at different moments. Moreover, the velocity distribution of the sleeper vibration can be calculated to provide the radiation noise calculation for the orbital system Vibration data.