385高压共轨柴油机连杆的有限元分析与优化  

Finite Element Analysis and Structural Improvement of Connecting Rod of 385 High Pressure Common Diesel Engine

作　　者：郑斌[1] 刘瑞祥[1] 孟建[1] 

机构地区：[1]山东理工大学交通与车辆工程学院,山东淄博255049

出　　处：《农机化研究》2012年第11期228-232,共5页Journal of Agricultural Mechanization Research

基　　金：山东省自然科学基金项目(ZR2010EM070);山东省高等学校科技计划项目(J10LD62)

摘　　要：对385高压共轨柴油机的连杆进行了三维有限元分析,得到连杆的应力分布、应变和安全系数的情况,并对其进行结构优化。结果表明:在最大压缩工况时,最大应力点出现在连杆小头与杆身过渡处的凹槽内侧,最大应力值为253.98MPa,最大应变值为0.001 21,连杆的强度安全系数为3.15;在最大拉伸工况时,最大应力点出现在连杆小头内表面,最大应力值为89.41MPa,最大应变值为0.000 423 8。根据计算结果对连杆结构进行了优化,并得到了最优设计方案,优化后的连杆体积减少了3.4%,且连杆的强度符合要求。Stress distribution, strain and safety factor of connecting rod of 385 high pressure common diesel engine were analyzed by 3D finite element method. Structure of connecting rod was improved. The results show that the exposed de- structive position is the transition location of the small head and connecting shaft at maximum compression condition. Maximum stress is 253.98 MPa. Structural safety factor is 3.15. The exposed destructive position is inner surface of small head at maximum stretch condition. Maximum stress is 89.41 MPa. Maximum deformation is 0. 000 4238. Struc- tural parameter of connecting rod is improved. The optimal design project is proposed. The volume of connecting rod which is optimized decrease 3.4%. Intensity of connecting rod which is optimized meet the design criterion.

关 键 词：连杆 高压共轨 柴油机 有限元分析 

分 类 号：TK434.6[动力工程及工程热物理—动力机械及工程]