高速列车弹性车体垂向振动控制

Vertical Vibration Control of Flexible High-speed Railway Car Body

建立包含车体弹性的高速列车单车刚柔耦合动力学模型。针对车体垂向振动,分别在一系悬挂和二系悬挂系统中采用半主动控制策略,研究控制策略对车辆运行平稳性的影响。结果表明,二系天棚阻尼半主动控制与二系阻尼连续可调型半主动控制均能有效降低车体低频处的刚性振动,相对而言,前者对于低频振动抑制效果更佳,但对较高频率的弹性振动无明显作用;一系天棚阻尼半主动控制策略作用频域较宽,包括人体对垂向振动最敏感的频域4～8 Hz,且可有效抑制车体在10～20 Hz的弹性振动。结果还表明,一系天棚阻尼半主动控制改善车辆运行平稳性最为有效,且加入一系天棚阻尼控制后,车辆系统轮轨作用改变不大。

A high-speed railway vehicle rigid-flexible coupling dynamics model including the flexibility of car body is built.Aiming at the car body vertical vibration,vertical semi-active control strategies are adopted in primary and secondary suspension system,respectively,and the influences of control strategies on ride quality are studied.Results show that both of the semi-active secondary suspension based on skyhook control law and the semi-active secondary suspension with continuous damping can effectively suppress the rigid vibrations of car body that lie in a relatively low frequency range,comparatively,the former can receive a better control result,but almost has no effects on the high frequency vibrations;The response frequency domain of semi-active primary suspension based on skyhook control law is wider,including 4～8 Hz which are the most sensitive vertical vibration frequencies for human body and the flexible vibrations in the range of 10～20 Hz.Results also show that semi-active primary suspension based on skyhook control law improves ride quality of car body most,and has little impact on wheel/rail interaction.