重型自卸车车架结构强度分析与改进研究  

Strength analysis and improvement for frame of heavy dump truck

作　　者：郝明刚[1] 王铁[1] 陈峙[1] 褚玉锋 刘伦伦[1] 姚鹏华 

机构地区：[1]太原理工大学车辆工程系,山西太原030024

出　　处：《机电工程》2014年第5期587-590,共4页Journal of Mechanical & Electrical Engineering

基　　金：山西省高新技术产业化资助项目(20112368);山西省研究生优秀创新资助项目(20123025)

摘　　要：针对TY型自卸车车架结构设计是否合理的问题,将有限元分析方法应用到车架结构强度分析中。首先对车架模型做了合理的简化,建立了基于Hypermesh的车架结构有限元模型,并分析了弯曲、扭转和举升等多种工况下车架的应力情况;针对举升工况下车架第四横梁区域应力集中现象,提出了相应的车架结构改进方案;将第4横梁及其上连接板高度相应的加高,重新布局该处的螺栓孔,并对改进后的方案进行了强度校核。研究结果表明:改进后举升瞬间车架的最大应力减小了71.8 MPa,举升45°工况下车架的最大应力减小了55.2 MPa,弯曲工况和扭转工况下车架最大应力也有不同程度地降低,避免了该区域的应力集中现象,验证了该改进方案的有效性,为后续车架结构的改进提供了参考依据。Aiming at the problem of the design of TY dump truck frame whether it is reasonable,the finite element analysis method was applied to the frame strength analysis.Firstly,the frame model was simplified reasonably,and the finite element model of a frame structure was established based on Hypermesh.The case of the stress of the frame was analyzed in bending,torsion and lifting condition.The improvement design of frame structure was put forword to solve the problem of stress distribution uneven phenomenon in fourth beam area.The fourth beam and its connecting plate were heightened corresponding,and the bolt holes were redistributed.The strength of the improved scheme was checked.The results indicate that,the maximum stress of frame reduces by 71.8 MPa in lifting instant,the maximum stress of frame reduces by 55.2 MPa in condition of lifting 45°,and the maximum stress also reduces differently under bending and twisting condition.The stress concentration is avoided,which illustrates the improved scheme is effective and provides a reference for follow-up frame structure improvement.

关 键 词：自卸车 车架 强度分析 改进 

分 类 号：TH114[机械工程—机械设计及理论] U463.32[机械工程—车辆工程]