Research on Influence and Mechanism of Yaw Damper Layout on Lateral Dynamics Performance for Power Car
In order to explain the difference in lateral ride comfort characteristics regarding two types of domestic power cars of power concentrated EMUs of the same level in actual operation,a comparative dynamics simulation research was conducted on the power car using four typical layouts of yaw dampers.By establishing corresponding dynamics model of power car through the commercial software Simpack,the influence of the lateral installation angle of yaw dampers on lat-eral ride comfort and the difference between the carbody's front and rear ends was investigated.The modal analysis method was utilized to explore the impact of the lateral installation angle on hunting stability and the phase lag between the carbody's lateral and yaw motions.In addition,the phase lag between the additional lateral force and torque pro-duced from the yaw damper was introduced to interpret the influence mechanism of the layout on lateral ride comfort for the power car.The results show that when the power car adopts the yaw damper layout with the opening inward,reducing the lateral installation angle of yaw dampers can improve the lateral dynamics performance.With the layout of opening outward employed by the power car,an appropriate lateral installation angle is required and conducive to lateral ride comfort and hunting stability,significantly reducing or even eliminating the difference in lateral ride comfort between the carbody's front and rear ends.Under the skew-symmetric or anti skew-symmetric yaw damper layout of the power car,the lateral installation angle has minor effect on the lateral dynamics behaviors of the power car,but with a large differ-ence likely to be formed in lateral ride comfort between the front and rear ends of the carbody.Hence,it is suggested that the layout of opening outward should be employed for the power car with a B0-B0 axle arrangement,with the selec-tion range of the lateral installation angle of 3°～5°.
power caryaw damper layoutlateral ride comforthunting stabilityforce analysis
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