| 基于有限元法的发动机曲轴静强度分析 |
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| 引用本文： | 徐中明,牟笑静,彭旭阳. 基于有限元法的发动机曲轴静强度分析[J]. 重庆大学学报(自然科学版), 2008, 31(9) |
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| 作者姓名： | 徐中明 牟笑静 彭旭阳 |
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| 作者单位： | 重庆大学,机械传动国家重点实验室,重庆,400030;重庆大学,机械工程学院,重庆,400030;重庆大学,机械工程学院,重庆,400030 |
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| 摘 要： | 针对某单缸发动机曲轴断裂问题,在CATIA里进行了三维实体建模,通过导入Hypermesh进行划分网格等前处理,利用MSC.Patran /Nastran对其进行有限元分析.结果表明:在使用球墨铸铁为材料的情况下,曲轴的疲劳强度安全系数未满足要求,从理论上验证了曲轴会发生断裂;将材料更换为40Cr的曲轴,其疲劳强度安全系数满足要求,理论上不会发生断裂,最后通过400 h发动机可靠性试验验证了仿真的正确性.
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| 关 键 词： | 发动机曲轴 静强度分析 有限元法 |
Engine crankshaft static strength analysis based on the finite element method |
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| XU Zhong-ming,MU Xiao-jing,PENG Xu-yang. Engine crankshaft static strength analysis based on the finite element method[J]. Journal of Chongqing University(Natural Science Edition), 2008, 31(9) |
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| Authors: | XU Zhong-ming MU Xiao-jing PENG Xu-yang |
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| Abstract: | Focusing on the fracture issue of single cylinder engine crankshafts,a three-dimensional solid model was built in CATIA.Pre-treatments,such as plotting grids,were carried out through Hypermesh,and finite element analysis was done using MSC.Patran/Nastran.The results show that the fatigue safety coefficient cannot meet demand when nodular iron is the crankshaft material.This finding verifies the theoretical possibility of crankshaft fracture.A crankshaft using 40Cr theoretically would not fracture because the fatigue safety coefficient could meet the demand.Simulation correctness was verified by a 400 hour engine reliability test. |
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| Keywords: | engine crankshaft static strength analysis finite element method |
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