考虑材料非线性的梨形吊臂滑块接触强度研究  

Study on contact strength of pyriform suspension arm and sliding block considering material nonlinearity

作　　者：李辛[1] 张仲鹏[1] 温明亮[1] 江传东 

机构地区：[1]西南交通大学机械工程研究所,成都610031

出　　处：《起重运输机械》2015年第9期55-60,共6页Hoisting and Conveying Machinery

基　　金：铁道部科技研究开发计划(2007J017);中央高校基本科研业务费专项资金资助(2010ZT03)

摘　　要：以160 t双回转伸缩臂铁路起重机作为研究对象,选取最危险工况,在非线性有限元软件ABAQUS中建立其梨形截面形式下的伸缩吊臂模型。设置滑块与吊臂之间的摩擦接触行为,考虑液压缸与吊臂尾部之间的铰接关系,模拟计算出吊臂的整体强度与滑块上的应力分布。在此基础上,考虑滑块局部塑性变形,在弹塑性力学范畴内,采用双线性强化模型作为滑块材料的弹塑性本构关系,以等向强化模型描述滑块材料的加载面,经过95次迭代计算,得到了滑块弹塑性应力结果与塑性区域分布。此结果与工程实际更加贴合,为今后特殊截面形式吊臂设计计算及滑块材料更有效的利用提供了借鉴方法。With the 160t double rotary telescopic boom railway crane as the study object,the paper develops the model for the telescopic boom of pyriform section in the nonlinear finite element software ABAQUS under the most dangerous working conditions.The frictional contact behavior between the sliding block and the telescopic boom is set,and overall strength of the telescopic boom and stress distribution on sliding block are calculated considering the coupling connection between the hydraulic cylinder and boom tail.Based on this,considering the local plastic deformation of the hydraulic cylinder,the bilinear reinforcement model is taken to deal with the elastic-plastic constitutive relation within the realm of elastic-plastic mechanics.The isotropic reinforcement model is used to define the loaded face of the sliding material.After iterative computations for 95 times,the sliding block elastic-plastic stress result and plastic zone distribution are obtained.The result is more consistent with the engineering practice,providing guidance for design calculation of the boom in special sectional shapes and efficient use of sliding blocks.

关 键 词：梨形截面吊臂 滑块 接触非线性 材料非线性 ABAQUS 

分 类 号：TH218[机械工程—机械制造及自动化]