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为了研究气动力对磁浮列车运行稳定性的影响,以上海磁浮列车为研究对象,采用动网格技术,通过求解三维可压缩非定常N S方程对磁悬浮列车在相对速度860 km/h交会时的气动力进行数值模拟;同时将车体、悬浮架作为弹性体,悬挂系统作为弹簧阻尼单元,建立了详细的系统动力学模型,对考虑列车交会瞬态压力冲击作用下的高速磁浮列车进行了横向振动分析。计算结果表明,流场数值计算出的最大压力波幅值与实车试验结果两者差距小于6%;仅考虑轨道不平顺时,磁浮列车的横向振动较小,而在考虑磁浮列车高速运行时产生的交会压力波的情况下,车体却产生了较大的横向振动,底架最大横向加速度达1 5 m/s2,经过二系悬挂的缓冲作用后振动明显减小,悬浮架最大横向振动加速度约为0 7 m/s2。
In order to study the influence of aerodynamic forces on the running stability of the maglev train, the maglev train in Shanghai is taken as the research object. The moving grid technique is adopted to solve the three-dimensional compressible unsteady Navier-Stokes equations. When the magnetic levitation train meets at a relative speed of 860 km / h And the dynamic simulation is carried out. At the same time, a detailed system dynamics model is established by using the vehicle body and suspension frame as the elastic body and the suspension system as the spring damping unit. The lateral vibration of the high-speed maglev train under transient pressure impact analysis. The calculation results show that the difference between the maximum pressure wave amplitude calculated by the flow field and the real vehicle test result is less than 6%. When the track irregularity is considered, the lateral vibration of the maglev train is small. When considering the high speed operation of the maglev train Resulting in the intersection of pressure wave case, the body has a greater horizontal vibration, the maximum lateral acceleration of the chassis up to 15m / s2, after the suspension of the secondary suspension significantly reduced the vibration of the shock, the maximum horizontal suspension suspension vibration The acceleration is about 0 7 m / s2.