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大型锻压机典型组合结构接触问题的研究
英文标题:Research on contact problems of typical composite structure for large forging press
作者:王芳芳 湛利华 黄明辉 
单位:中南大学 
关键词:锻压机 组合结构 有限元分析 接触应力 力流传递 
分类号:TH122
出版年,卷(期):页码:2011,36(1):69-72
摘要:

为保证大型锻压机组合结构的整体工作性能,针对锻压机典型的局部组合结构——C型板与十字键联接,运用大型商用有限元软件Marc,分析了锻造过程中巨大工作载荷传递引起的两者之间的接触状态变化规律。研究结果表明:工作载荷作用下,十字键和C型板之间接触面积减小,出现“开缝”和界面接触应力分布极度不均匀的现象,直接影响压机结构承载过程中的力流传递特征。通过设置合理的过盈量,使“开缝”值在满足强度设计条件下的最大降幅达到77.87%,改善了接触应力分布极度不均匀现象,最大应力差值由156.42 MPa降为131.59 MPa,增大了两者之间的接触面积,使得力流传递均匀。

On account of the press's typical structure (C plates and cross key), the commercial finite element software Marc was used to study the contact stress laws which was caused by the huge working load during forging to ensure the nice integrated working performance of large forging press's composite structure results. The research results indicate that the contact area decreases, the slit appears, and the distribution of contact stress is extremely non-uniform between C plates and cross key, which directly affects the transmission characteristics of force flow during the process of loading. The reasonable interference fit is set to improve or eliminate the phenomenon. The interference fit makes the maximum downrange of slit reach to 77.87% under the premise of meeting strength design, improves the extremely non-uniform contact stress, the maximum stress difference changes from 156.42 MPa to 131.59 MPa, and the increase of contact area leads to the transmission of force flow uniformly.   

基金项目:
国家自然科学基金资助项目(50705099)
作者简介:
参考文献:


[1]  高云开. 三维摩擦接触问题数值解法及工程应用[D]. 上海:同济大学,2007.
[2]  许小强,赵洪伦. 过盈配合应力的接触非线性有限元分析[J]. 机械设计与研究,2000,(1):33-35.
[3]  陈火红. Marc有限元实例分析教程[M]. 北京:机械工业出版社,2002.
[4]  许小强,赵洪伦. 铁道车辆轮轴装配应力的非线性有限元分析[J].上海铁道大学学报,1999,20(12):76-80.
[5]  廖爱华,张洪武,吴昌华. 叶片机械过盈配合的接触分析[J]. 机械强度,2006,28(2):282-286.
[6]  黄宁,黄明辉,湛利华,等. 巨型压机C型机架的结构分析与改进[J].锻压技术,2009,34(5):93-95.
[7]  张剑寒,曾攀,颜永年,等. 400MN航空模锻液压机机架有限元分析[J].锻压技术,2009,34(4):93-96.
[8]  Ghaderi-Panah A, Fenner R T. A general boundary element method approach to the solution of three-dimensional frictionless contact problems[J]. Engineering Analysis with Boundary Elements,1998,(21):305-316.
[9]  Iban A L, Garrido J A, Prieto I. Contact algorithm for non-linear elastic problems with large displacements and friction using the boundary element method[J]. Computer Methods in Applied Mechanics and Engineering,1999, 178: 51-67.
[10]  丁培杰,吴昌华. 增压器压气机精细接触问题的研究[J].铁道机车车辆,2003,23(1):64-66.
[11]  栾茂田,黎勇,范静海,等. 考虑接触应力非线性分布的接触力元模式及其验证分析[J]. 固体力学学报,2005,26(2):216-220.
[12]  吕琳,邓明,李艳霞,等. 基于有限元分析的精冲液压机机身结构优化[J]. 锻压技术,2010,35(2):102-106.
[13]  王尚斌,孙宁,张庆飞. 5000 kN机械压力机机身有限元分析[J]. 锻压技术,2009,34(2):83-87.


 

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