小车轮压作用处偏轨箱形梁主腹板的局部应力研究  

Study of local stress of the main web from the bias-rail box girder nearby the trolley wheel pressure

作　　者：付为刚[1] 程文明[1] 濮德璋[1] 

机构地区：[1]西南交通大学机械工程研究所

出　　处：《起重运输机械》2009年第12期44-48,共5页Hoisting and Conveying Machinery

摘　　要：小车轮压作用下,轨道与偏轨箱形梁之间力的传递属于接触非线性问题,接触面间的变形和应力分布存在相互耦合的关系。本论文的主要内容:将Hertz接触理论和有限元软件ANSYS结合起来,把主腹板的局部受力问题视为小车轮与轨道及轨道与上翼缘板之间发生接触行为作用下的受力问题,建立了小车轮压作用处偏轨箱形梁主腹板局部受力的接触分析模型,研究不同情况(小车轮压、箱形梁几何参数和轨道截面惯性矩)下局部应力的变化规律,得出相关结论;最后将经验公式解与ANSYS数值解进行对比分析论证。研究结果表明:ANSYS数值解的主要影响因素为小车轮压、主腹板厚度和轨道截面惯性矩;通过在相同情况下对比2种解,得出ANSYS数值解与经验公式解在数值上很接近,经验公式解能够满足工程实际需要。The force transmission, due to the crane trolley wheel pressure, from rail to bias-rail box girder belongs to the nonlinear contact. There is a coupling relationship between the deformation of contact area and the stress distribution. The paper describes how the local force of the main web is considered as the force caused by the contact pressure among the trolley wheel, rail and top flange, and how the contact analysis model for the local force is built by means of both Hertz the- ory and finite element software ANSYS combined. Also, it analyzes the variation of the local stress under the different con- ditions and comes to a conclusion, and compares the results derived from the experimental formula with the result from AN- SYS. The research result shows that the factors affecting ANSYS numerical solution are the trolley pressure, the main web thickness and the rail section moment of inertial ; and that ANSYS numerical solution and the experimental formula solution are very close under the same condition. The experimental formula solution can meet the engineering requirements.

关 键 词：偏轨箱形梁 局部应力 接触非线性 有限元 

分 类 号：TH21[机械工程—机械制造及自动化]