中文摘要：

由于重型半挂车极限工况稳定性通过试验研究难度较大，本文在ADAMS中建立了重型半挂车的动力学模型，通过进行方向盘阶跃输入和ISO移线的仿真分析，得到重型半挂车易发生的折叠危险工况并分析其产生原因。仿真结果表明，车辆动力学模型可以很好地仿真折叠工况下的车辆响应，为重型半挂车的极限工况稳定性研究提供准确参考。

英文摘要：

A dynamic model was set up in the ADAMS in order to research the heavy tractor semi-trailer stability. The jack-knifing of heavy tractor semi-trailer was simulated in the ADAMS. The conditions being prone to jack-knifing were analyzed. The simulation results show that the vehicle dynamic model can receive the vehicle response very well. So it is benefit to the research of the heavy tractor semi-trailer stabihty.