摘要
采用ANSYS有限元软件,在内燃机曲轴——轴承系统动力学与摩擦学耦合分析的基础上,通过对曲轴动应力分析,确定了裂纹的启裂部位。运用有限元法计算了不同裂纹深度下的等效应力强度因子并得出其变化规律。计算结果表明,等效应力强度因子与发动机点火顺序密切相关,其峰值随裂纹深度的增加而增大。
The dynamic stress intensity factor of crankshaft in a diesel engine was analyzed by finite element analysis software ANSYS.The dynamic stress of the crankshaft was calculated based on multidisciplinary coupling analysis between dynamics and tribology on a crankshaft-bearing system in order to determine the position of the initial crack in crankshaft.The equivalent stress intensity factors KIeq of the crankshaft with various depth cracks were obtained by FEM software ANSYS.The numerical simulation results show that the equivalent stress intensity factors KIeq relates with the engine firing order,their peak value rises while the crack depth increases.
出处
《热加工工艺》
CSCD
北大核心
2011年第9期13-16,共4页
Hot Working Technology
基金
安徽省高等学校自然科学基金资助(KJ2008A031KJ2010-A042)
关键词
曲轴
应力强度因子
有限元法
裂纹深度
crankshaft
stress intensity factor
finite element method
crack depth
