混合动力专用发动机曲轴扭转疲劳强度分析OA
Analysis of Torsional Fatigue Strength of Crankshafts for Hybrid-Specific Engines
选取某 4 缸混合动力专用发动机曲轴作为研究对象,通过有限元模拟与扭转疲劳强度试验,结合静态、动态工况下的试验数据及应力应变信息,建立应力分析模型.分析各工况下的应力分布特征,发现应力与载荷幅值、频率呈正相关趋势;在应变速率 5.15 s-1条件下,动态工况应力水平低于静态.当曲轴应力幅值远低于疲劳极限且忽略外部因素影响时,理论上处于无限寿命区间.考虑切割加工对刚度的影响,对试验数据进行误差修正后,所有测点误差均控制在 10%以内,验证了试验模型具有较高的可信度.
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.
易云珠;雷基林;杨雄专;余明江;武红
昆明理工大学 云南省内燃机重点实验室,昆明 650500昆明理工大学 云南省内燃机重点实验室,昆明 650500||云南交通运输职业学院,昆明 650300昆明理工大学 云南省内燃机重点实验室,昆明 650500云内动力股份有限公司,昆明 650500昆明理工大学 云南省内燃机重点实验室,昆明 650500
能源科技
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
crankshaftfatigue strength analysistorsion fatigue testdynamic torquehybrid-specific engine
《内燃机工程》 2026 (2)
99-109,11
云南省省市一体化专项项目(202202AC080004)云南省重大科技专项计划项目(202302AE090052) Yunnan Province Provincial-Municipal Integration Special Project(202202AC080004)Yunnan Province Major Science and Technology Special Project Plan(202302AE090052)
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