| 摘要:采用仿真分析的方法计算了高功率密度(HPD)柴油机的工作过程,并以此为基础计算了HPD柴油机连杆所受机械负荷,利用有限元方法分析了连杆受最大载荷时的应力和变形。计算结果表明,不同转速下HPD柴油机的最大压缩载荷比常规功率密度(TPD)柴油机高0.5～2倍以上,最大拉伸载荷则相差无几；最大压缩载荷并不出现在标定转速工况；与常规功率密度柴油机相比,连杆应力的增加与机械负荷的增加基本呈线性关系。 |
| 关键词: 高功率密度柴油机 连杆 载荷 强度 |
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| Strength Analysis on Connecting Rod of a High Power Density Diesel Engine |
| Zhao Jiwei,Li Renxian |
| School of Mechanical Engineering, Southwest Jiaotong University, SichuanChengdu610031 |
| Abstract:The working process of a high power density(HPD)diesel engine was analyzed by computational simulation. Based on the analysis, the mechanical load on connecting rod of HPD diesel engine was calculated and the connecting rod stress distribution as well as its deformation under the highest load was analyzed by finite element method. The calculation results show that in varied running speed, the maximum compressive load acting on connecting rod of HPD diesel engine is 0.5~2 times higher than that of on connecting rod of traditional power density (TPD) diesel engine. The maximum stretching loads on the two engines are similar. The largest maximum compressive load does not occur under rated speed. The raise level of mechanical stress and the raise level of mechanical load acting on connecting rod basically shows a lineal relationship compared with TPD diesel engine. |
| Key words: high power density diesel engine connecting rod load strength |
