横向风场作用下磁悬浮车体运动稳定性数值研究

Numerical analyses of dynamic stability of maglev vehicles in crosswind field

建立了风场作用下具有起伏、侧移、俯仰、侧滚和偏航五自由度运动的磁悬浮车体模型.以粘性不可压Navier-Stokes方程以及K-ε双方程湍流模型理论为基础,利用有限元分析软件ANSYS对磁悬浮车体/轨道系统的空气动力特性进行了数值分析,并研究了风荷载作用下车体的动力学行为.结果表明风速、车速、反馈增益系数对磁悬浮车体运行的稳定性具有很大影响,并进一步给出了具体影响规律.

The model of maglev control system, which represents five kinds of vehicle motions such as heave, sway, pitch, roll and yaw, was established. Based on the steady and incompressible Navier-Stokes equation and K-ε turbulent model, numerical calculations for the aerodynamic characteristics of vehicle/guideway system under crosswinds were done with the use of the finite element analysis software ANSYS. The dynamical characteristics of the vehicle were studied. The analysis result showed that wind velocity, vehicle velocity and control parameters have significant influences on the stability of maglev vehicles and their regularities were given out.