发动机曲轴过渡圆角应力集中计算分析  

Calculation and Analysis of Stress Concentration in Engine Crankshaft Fillet

作　　者：沈晓晨 董雪飞 郭骁 SHEN Xiaocheng;DONG Feixue;GUO Xiao(Shanxi Vocational College of Engineering,Taiyuan 030027,China;Beijing Aerospace Time Feihong Technology Company Limited,Beijing 100094,China)

机构地区：[1]山西工程职业学院,山西太原030027 [2]航天时代飞鸿技术股份有限公司,北京市100094

出　　处：《内燃机》2025年第2期40-45,共6页Internal Combustion Engines

摘　　要：本文介绍了一种理论计算方法,并实际应用以解决某国产航空活塞发动机曲轴过渡圆角应力集中问题。为避免出现疲劳失效,基于某国产航空活塞发动机曲轴的工程实际设计状态,通过计算来验证其应力集中情况是否满足应用要求。结果表明,曲轴的半径为1mm的过渡圆角能有效避免应力集中导致的疲劳失效、断裂等失效隐患,且此处应力未超过屈服应力,不会出现塑性变形。To resolve the stress concentration issue in the fillet of a crankshaft from a domestic aviation piston engine,this paper presents a theoretical calculation method.Based on the design of the crankshaft,it verifies whether the stress concentration meets requirements to prevent fatigue failure.Calculations show that the 1mm fillet radius effectively avoids stress concentration-induced fatigue failure and fracture.Moreover,calculations confirm that the stress here does not exceed the yield stress,so plastic deformation won't occur.

关 键 词：航空活塞发动机 过渡圆角 应力集中 疲劳失效 发动机曲轴 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程]