基于钢结构焊接制造理论,结合现场焊接经验,设计专用装配工装,对铰接式无轨胶轮车后车架进行了合理断开、装配和焊接,完成了加长改造;采用有限元方法对改造前后的后车架进行应力分析,并对车架结构强度进行对比,评价了新车架的改造效果,为改造可行性提供了理论依据,对后车架的生产和应用具有一定的指导意义。 Based on the theory of steel structure welding manufacturing, combined with the experience of on-site welding, the special assembly tooling was designed to reasonably disconnect, assemble and weld the rear frame of the articulated trolley. The finite element method The rear frame carries on the stress analysis, compares the frame structure strength, evaluates the effect of the new frame retrofit and provides a theoretical basis for the feasibility of retrofitting, which is of guiding significance to the production and application of the rear frame.