中文摘要：

建立钩尾圆弧摩擦面与从板圆弧摩擦面的曲面-曲面接触摩擦数学模型，并结合改进的具有非线性迟滞特性的缓冲器数学模型和扁销止挡数学模型，采用SIMPACK软件建立重载机车扁销钩缓装置的动力学分析模型并验证其准确性，研究钩尾与从板问的摩擦系数及它们相互接触的圆弧摩擦面半径对钩缓装置受压稳定性的影响。结果表明：摩擦系数对钩缓装置的受压稳定性影响较大，随着摩擦系数的增大，钩尾的摩擦约束作用逐渐增强，钩缓装置的受压稳定性也随之增强，车钩转角呈阶梯形减小，建}义摩擦系数的合理控制范围为0．25～0．45；钩尾的圆弧摩擦面半径越大、从板圆的圆弧摩擦面半径越小，则钩缓装置的受压稳定性越好。

英文摘要：

The mathematical model of the contact friction process between the arc surfaces of coupler-tail and following plate was established. With-SIMPACK software, the dynamics analysis model of flattened knuckle pivot pin coupler equipped by heavy haul locomotive was built by incorporating the improved mathematical model of the nonlinear hysteretic draft gear and the mathematical model of coupler-tail rota- tion stopping element, and its accuracy was validated. On this basis, simulations were carried out to study the friction coefficient between coupler-tail and following plate as well as the influence of the arc radius of their friction surfaces on the compressive stability of coupler and draft gear. Results indicate that the fric- tion coefficient has great influence on the compressive stability of coupler and draft gear. Both the friction constraint effect of coupler-tail together with the compressive stability of coupler and draft gear enhance gradually with the increase of friction coefficient. The coupler angle decreases step-like, and it is suggested that the reasonable control range for friction coefficient should be 0.25~0. 45. Larger arc radius of coupler-tail friction surface and smaller arc radius of following plate friction surface result in better com- pressive stability of coupler and draft gear.