基于动力学仿真的无轨胶轮车车架有限元分析

以某无轨胶轮车车架为研究对象,首先建立整车动力学仿真模型,运用多体动力学软件分析了几种工况下车架所承受的动载荷特性,然后根据仿真得出的最恶劣工况施加载荷和边界条件,建立车架有限元模型,采用有限元方法分析车架应力,最后根据应力结果改进车架结构设计。结果表明,改进后的车架结构可同时满足强度和轻量化要求。结合动力学仿真的有限元分析其结果更接近实际,可为无轨胶轮车车架结构设计提供理论依据。

Finite Element Analysis of Frame basing on Dynamic Simulation for Trackless Rubber-tyred Vehicle

The frame of a trackless rubber-tyred vehicle was studied in the article. Firstly, dynamic simulating model of the whole vehicle was built, and dynamic load character on the frame was analyzed under several working conditions by multi-body dynamic software. Secondly, with boundary condition and load data under the most formidable work condition which identified by dynamic analysis, finite element model of the frame was built and stress of its structure strength was analyzed. Lastly, structure improvement of the frame was processed and analyzed according to stress analysis result. The study result showed that the improved frame structure could meet both strength and light weight requirements. Finite element analysis result with dynamic simulating associated was more accurate. The above analysis not only provide a theoretical basis for designing the frame structure, but also provide method and guide for appraising and promoting like products designing.