| 摘要:针对新泻PA5型柴油机经常发生连杆切口啮合齿疲劳失效的故障,在曲轴连杆组件动态仿真和连杆有限元分析的基础上对连杆切口部位的疲劳寿命进行了计算和分析。分析结果表明:由于在齿形处存在比较严重的应力集中,导致局部尤其是齿根处的寿命较低。建议在运行12 000-24 000h后应注意疲劳裂纹的检查,以避免失效故障的发生。 |
| 关键词: 柴油机 连杆 仿真 有限元 疲劳寿命 |
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| Connecting Rod Fatigue Life Calculation Basedon Dynamic Simulation and FEA |
| Jiang Huayun,Ye Jian,Xiao Yu,Yang Jiankun,Gu Wei |
| Tianjin Branch, CNOOC Ltd., Tianjin 300452,;CNOOC Oilfield Construction Engineering Co., Tianjin 300452 |
| Abstract:The Niigata PA5 diesel engines constantly broke down because of fatigue failures of connecting rods at the area of incision’s engaging teeth. Based on dynamic simulation of connecting rod and FEA, the fatigue life at the area of incision is calculated and analyzed. Analysis results show that there are local stress concentrations at the incision area, so fatigue life of some local position are short, especially the engaging teeth area. It is advised that after 12 000~24 000h running, inspection must be carried out on fatigue cracks to avoid failures. |
| Key words: diesel engine connecting rod simulation finite element fatigue life〖FL |
