【摘要】 用大型软件MSC/PATRAN建立城市轨道交通系统车/桥有限元模型,将轨道不平顺作为车/桥耦合振动的激励源,并采用有限元软件MSC/DYTRAN计算耦合系统在普通板式橡胶支座和钢弹簧支座两种情形下的振动响应。计算结果显示,钢弹簧支座能更有效地降低梁体与桥墩的振动加速度。虽然在采用该减振措施后,车体的振动加速度值有所增加,但旅客乘座舒适度和列车平稳性指标仍在允许范围之内。对钢弹簧支座刚度参数的优化研究表明,当刚度系数值为2 54×108N·m-1时,车/桥耦合系统对环境的振动影响最小。更多还原

【Abstract】 The finite element model of train/bridge of urban rail transit system is established by using the software MSC/PATRAN. The track irregularity is considered as the exciting source of the coupled vibration of train/bridge. The coupled system vibration responses for ordinary laminated rubber bearing and steel spring bearing are calculated using finite element method MSC/DYTRAN. Calculation results indicate that the vibration acceleration of beam and pier can be more effectively reduced with steel spring bearing. Although the vibration acceleration of the train body is increased with such vibration-damping measures, passenger riding comfortableness and train running smoothness index are still within the permitted range. Optimizing results of the stiffness parameter of steel spring bearing indicate that the impact of the coupled vibration of train and bridge on the environment is minimum when the stiffness parameter is 254×10⁸ N·m^-1.更多还原