半挂车牵引座路面激励强度与疲劳强度分析

Road Excitation and Fatigue Intensity Analysis on Semi-Trailer Tractor

将用ADAMS和MATLAB共同仿真获得的C级路面时域激励信号作用于仿真模型,得到牵引座上表面所承受的载荷谱;结合完全法对牵引座进行时间历程分析,得出牵引座在工作状态下的von Mises应力和等效应变图。结果表明:半挂牵引车在C级路面激励下结构强度、刚度均满足要求。在此基础上,根据牵引座在实际车辆运输过程中所承受的载荷变化,借助ANSYS nCode Designlife有限元软件估算出牵引座的极限疲劳寿命,确定易疲劳的关键部位,对未来牵引座的结构设计和优化具有重要的指导意义。

In this paper,the dynamic load on the upper surface of the traction base was achieved by operating the united simulation results of time-domain excitation signal on C grade road via ADAMS and MATLAB to the simulation model.Meanwhile,based on the time history analysis pointed at the traction base with the complete method,the von Misess stress contours and the equivalent strain contours were obtained.The results show that the traction base meets the requirements of structural strength and stiffness under the C grade road surface excitation.On the basis of the results obtained above,according to the load variable of the traction base in the actual vehicle transportation process,the ultimate fatigue life of the traction base could be estimated and the key parts of fatigue could be determined by using“ANSYS nCode Designlife”finite element software,which will be of great guiding importance in the structure design and optimization of the traction base in the future.