内燃机工程2026，Vol.47Issue(2)：99-109,11.DOI:10.13949/j.cnki.nrjgc.2026.02.012
混合动力专用发动机曲轴扭转疲劳强度分析
Analysis of Torsional Fatigue Strength of Crankshafts for Hybrid-Specific Engines
摘要
Abstract
A four-cylinder hybrid-specific engine crankshaft was selected as the research object.Through finite element simulation and torsional fatigue strength testing,combined with test data and stress-strain information under static and dynamic conditions,a stress analysis model was established.The stress distribution characteristics under various conditions were analysed.It is found that stress is positively correlated with load amplitude and frequency.Under a strain rate of 5.15 s-1,the stress level under dynamic conditions is lower than that under static conditions.When the stress amplitude of the crankshaft is far below the fatigue limit and external factors are neglected,it theoretically falls within the infinite life range.Considering the impact of machining on stiffness,after error correction of the test data,all measurement point errors were controlled within 10%,verifying that the experimental model is highly reliable.关键词
曲轴/疲劳强度分析/扭转疲劳试验/动态转矩/混合动力专用发动机Key words
crankshaft/fatigue strength analysis/torsion fatigue test/dynamic torque/hybrid-specific engine分类
能源科技引用本文复制引用
易云珠,雷基林,杨雄专,余明江,武红..混合动力专用发动机曲轴扭转疲劳强度分析[J].内燃机工程,2026,47(2):99-109,11.基金项目
云南省省市一体化专项项目(202202AC080004) （202202AC080004）
云南省重大科技专项计划项目(202302AE090052) Yunnan Province Provincial-Municipal Integration Special Project(202202AC080004) （202302AE090052）
Yunnan Province Major Science and Technology Special Project Plan(202302AE090052) （202302AE090052）
