中国机械工程
中國機械工程
중국궤계공정
CHINA MECHANICAl ENGINEERING
2014年
18期
2519-2522
,共4页
连接件%振动疲劳%应力均方严重系数%名义应力法
連接件%振動疲勞%應力均方嚴重繫數%名義應力法
련접건%진동피로%응력균방엄중계수%명의응역법
joint%vibration fatigue%stress mean square severity factor%nominal stress approach
提出了采用名义应力法估算振动载荷下连接件疲劳寿命的方法。综合考虑连接件孔边的应力均方根集中程度、孔表面状况和填充系数的影响，给出了连接件在振动载荷激励下的应力均方严重系数，然后结合连接件孔边的动态特性给出了振动疲劳缺口系数的计算公式。设计并完成了两种激励谱下304不锈钢的连接件振动疲劳试验，结果表明该方法可以很好地预测连接件的振动疲劳寿命。
提齣瞭採用名義應力法估算振動載荷下連接件疲勞壽命的方法。綜閤攷慮連接件孔邊的應力均方根集中程度、孔錶麵狀況和填充繫數的影響，給齣瞭連接件在振動載荷激勵下的應力均方嚴重繫數，然後結閤連接件孔邊的動態特性給齣瞭振動疲勞缺口繫數的計算公式。設計併完成瞭兩種激勵譜下304不鏽鋼的連接件振動疲勞試驗，結果錶明該方法可以很好地預測連接件的振動疲勞壽命。
제출료채용명의응역법고산진동재하하련접건피로수명적방법。종합고필련접건공변적응력균방근집중정도、공표면상황화전충계수적영향，급출료련접건재진동재하격려하적응력균방엄중계수，연후결합련접건공변적동태특성급출료진동피로결구계수적계산공식。설계병완성료량충격려보하304불수강적련접건진동피로시험，결과표명해방법가이흔호지예측련접건적진동피로수명。
A stress mean square severity factor of joints in vibration excitation was given aiming at fatigue life estimation problem herein .This stress mean square severity factor considered comprehen-sively the concentration degree of root mean square stress ,surface status and block coefficient at hole edge .Then a model was presented combining with the dynamic characteristics of hole edge .With this model ,the nominal stress approach of vibration fatigue life analysis of joints was obtained .A vibra-tion fatigue test was designed and carried out on 304 stainless steel .According to the results ,the method can predict the vibration fatigue life of multi-fastener joints well .
