考虑油膜润滑的连杆有限元分析

doi:10.3785/j.issn.1008-973X.2012.07.012

2012, Vol. 46

Issue (7): 1233-1237 DOI: 10.3785/j.issn.1008-973X.2012.07.012

机械与能源工程

考虑油膜润滑的连杆有限元分析

李一民1,郝志勇1,曾小春2

1.浙江大学能源工程学系,浙江杭州 310027；2.江铃汽车股份有限公司,江西南昌 330000

Finite element analysis for connecting rod considering oil film lubrication

LI Yi-min1, HAO Zhi-yong1, ZENG Xiao-chun2

1.College of Energy Engineering, Zhejiang University, Hangzhou 310027, China;
2. Jiangling Motors Limited Corporation, Nanchang 330000, China

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摘要：

建立连杆多体动力学模型,研究连杆的弹性液体动力学(EHD)特性,分析大头轴承的载荷、油膜厚度及油膜压力在轴瓦表面的分布.建立连杆有限元模型,考虑各组件间的接触关系,分析连杆在装配载荷下的应力分布及变形.通过油膜压力映射的方法对连杆施加载荷,计算连杆在拉、压2种工况下的应力分布与变形.考虑连杆材料与加工工艺,分析连杆的疲劳强度.结果表明,该连杆安全可靠.通过计算不考虑油膜润滑时的连杆强度,分析2种计算结果的差异.结果表明,考虑油膜润滑的连杆强度计算方法更符合实际工况.

Abstract:

Muti-body dynamic model of connecting rod was established and elastic hydrodynamic (EHD) characteristic of big end bearing was studied. Big end bearing loads, oil film thickness and pressure distribution on bearing shell were analyzed. Finite element model of connecting rod was constructed,and stress distribution and deformation under assembly loads were calculated considering contacts of all components. Applying loads to connecting rod through oil film pressure mapping, stress distribution and deformation were analyzed in tension and compression case. Fatigue strength was calculated based on material parameter and processing technology. Results show that the connecting rod is safe and reliable. Connecting rod strength was calculated without considering oil film lubrication, and differences of the two results were analyzed. The strength calculation method considering oil film lubrication is more consistent with the actual working conditions．

出版日期: 2012-07-01

TK 402

通讯作者: 郝志勇，男，教授，博导. E-mail: haozy@zju.edu.cn

作者简介: 李一民（1985-），男，博士生，从事内燃机振动噪声控制及现代设计方法研究.E-mail:yiminli@zju.edu.cn

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引用本文:

李一民,郝志勇,曾小春. 考虑油膜润滑的连杆有限元分析[J]. J4, 2012, 46(7): 1233-1237.

LI Yi-min, HAO Zhi-yong, ZENG Xiao-chun. Finite element analysis for connecting rod considering oil film lubrication. J4, 2012, 46(7): 1233-1237.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2012.07.012 或 http://www.zjujournals.com/eng/CN/Y2012/V46/I7/1233

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