抗俯仰液压互联悬架三轴重型货车动态特性(英文)

Dynamic Characteristics of a Tri-axle Heavy Truck Fitted Hydraulically Anti-pith Interconnected Suspension

完成了安装抗俯仰液压互联悬架(HIS)三轴货车动力学方程的推导。采用自由图法和阻抗传递矩阵方法推导建立耦合机械系统和液压系统的动力学方程,该特征方程以机械系统的位移和速度以及机械与液压耦合边界处的压力作为状态矢量。对比分析HIS对车体恢复力和力矩及车体振动固有频率的影响。结果表明,液压互联悬架HIS系统能够为车体提供较大的抗俯仰力矩。自由振动分析表明,HIS改变了车体垂向和俯仰振荡中心位置,且增加了车体俯仰模态对应的固有频率,同时车体垂向跳动模态对应的固有频率几乎保持不变。

This paper briefly presents the derivation of the equations of motion of a tri-axle truck fitted with pitch resistant hydraulically interconnected suspension （HIS） system. Based on free body diagram and fluid transfer impedance matrix method, the characteristic equations of this mechanically and hydraulically coupled system are derived with a state vector including the displacements and velocities of mechanical system and the pressure at the mechanical-hydraulic boundary section. The comparison analysis of the sprung mass＇ responses to road inputs is carried out between the trucks with conventional suspension and hydraulically interconnected suspension system. The obtained results indicate that the HIS system can provide great pitch restoring moment of sprung mass. And the free decay vibration analysis reveals that the HIS system changes the bounce and pitch oscillation center of sprung mass, and the obtained natural frequencies of bounce and pitch modes of sprung mass illustrate that the pitch stiffness is increased while the bounce stiffness is slightly softened.