基于多体动力学理论的履带车辆悬挂特性仿真研究

采用实体建模的多体系统动力学方法，以某型履带车辆为例，建立了整车实体模型，分析了悬挂系统的非线性特性，并建立了悬挂系统模型。通过该型车辆的变悬挂参数仿真，分析了履带车辆整车模型的动力学特性。数值仿真和现场试验结果的对比表明，采用多体动力学方法研究车辆悬挂特性具有很高的可信度。通过对车辆乘坐舒适性的研究，得出了悬挂参数应随工况而改变（即采用阻尼可调式半主动悬挂）可改善车辆乘坐舒适性的结论。该模型能真实反映车辆行驶时的动力学特性，其建模方法还可以应用于类似车辆的动力学特性研究。

Simulation Research on Suspension Characteristics of Tracked Vehicles Based on Multi-Body Dynamics Theory

A multi-body dynamics method of real body modeling was used. Taking a type of tracked vehicle as an example, full vehicle models of real-body and suspension system were built and nonlinear characteristics of suspension system were analyzed. Dynamics characteristic of the full tank vehicle model was analyzed in simulation by changing suspension parameters. Comparison results of simulation and field-testing show that multi-body modeling method is valid in researching vehicle suspension dynamics. The ride-comfort of vehicle was also studied by multi-body modeling method. A conclusion is drawn from the results that ride-comfort of tracked vehicle can be improve when suspension parameters are changed with different conditions, that is to say if semi-active suspension systems of changing damping ratio is applied to tracked vehicles, their ride comfort will be improved obviously. The model can describe dynamic performance of a real driving vehicle, and this method can be applied to investigate dynamic characteristics of other similar vehicles.