大吨位装载机驾驶室滚翻保护结构侧向加载有限元分析与试验  

Finite Element Analysis and Test of Side Loading on a Heavy-duty Loader ROPS

作　　者：李晓枫 王晓明 谷昆仑 孟令超 

机构地区：[1]徐工集团铲运机械事业部

出　　处：《工程机械》2018年第2期15-21,共7页Construction Machinery and Equipment

摘　　要：以徐工大吨位装载机驾驶室滚翻保护结构为研究对象,介绍驾驶室滚翻保护结构侧向加载仿真的基础理论、数值模拟方法和基于材料渐进损伤破坏准则,并建立驾驶室滚翻保护结构有限元模型和驾驶室安装螺栓的失效模型,通过计算机仿真分析获取其侧向承载力位移曲线、能量吸收曲线和螺栓损伤应力应变参数。根据仿真结果对滚翻保护结构进行改进设计,并进行试验验证。结果表明:仿真结果与试验结果一致,改进后的ROPS结构侧向承载力与侧向能量吸收匹配较好,在侧向能量吸收满足标准要求的前提下,滚翻保护结构侧向承载力误差为0.7%,侧向变形误差为4.4%,且安装螺栓塑性应变远低于其损伤开始时的等效塑性应变。XCMG's heavy-duty loaders cab with ROPS has been taken as an object for research work, and the text goes to introduce basic theories of side loading simulation, a data simulation, and criteria on materials graduate break-down, while building a finite elements model for the cab with ROPS,beside a defective model for the cab's broken fixing bolts. Through computerized simulation and analyses there have been got displacement curves of the side loading, and force-absorption curves, beside data in damage stress and strain for the bolt to be broken. Improved design has been done to the ROPS according the Simulation results while carrying out test validation. The results show that simulation result agrees with that of the tests. While the ROPS after improvement gains good match-up of its side-load bearing capability with the side-force absorption. On the precondition that the side-force absorption meets the specifications tolerance of the ROPS's capability which is to bear the side-load is 0.7%, side deformation tolerance is 4.40%, and more,plastic strain at the fixing bolts is lower by far than the equivalent plastic strain at the beginning of a damage.

关 键 词：轮式装载机 滚翻保护结构 数值模拟 材料损伤 

分 类 号：TH243[机械工程—机械制造及自动化]