铰接式自卸车橡胶弹簧悬架系统的动力学建模与分析

基于XAD250铰接式自卸车悬架结构拓扑关系，建立了橡胶弹簧悬架系统及整车的非线性数字化模型；在ADAMS软件中生成了等级路面后，以不同载荷和车速对样机进行了动力学仿真分析。分析结果表明：前悬架橡胶弹簧刚度的非线性特性能满足驾驶室在不同载荷下具有等支承频率，从而保证稳定的行驶平顺性要求；后悬架系统在轻载荷下较之重载荷具有较高的支承频率，这会影响到车辆的整体行驶平顺性。对后悬架橡胶弹簧刚度进行了优化，优化后橡胶弹簧的非线性刚度曲线能够使车辆保持稳定且有良好的平顺性。

Dynamic Modeling and Analysis of Rubber Suspension System of Articulated Dump Truck

Nonlinear virtual prototyping of XAD250 has been built based on topological analyses of suspension of XAD250 articulated dump truck, and the method of simulating grade road in ADAMS has been described. Multi-body dynamics analyses of the ride comfort have been performed with different velocities and different loads. Results indicate that the good and constant ride comfort of cab can be satisfied under different loads because of the nonlinear properties of rubber springs of front suspension. Rear suspension system under light load has higher supporting frequency than that under deadweight, which may result in instable ride comfort. Based on analysis results, optimization of rear suspension parameter has been carried out. Optimal results indicate that using rubber spring with optimum nonlinear elasticity characteristics results in good and constant ride comfort of AD250.The results provide a basis for the parameter optimization of suspension of articulated dump trucks.