平均应力及其分散性对结构振动可靠性的影响

陈立伟; 王延荣

平均应力及其分散性对结构振动可靠性的影响

北京航空航天大学能源与动力工程学院, 北京 100083

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出版历程
- 收稿日期: 2005-08-07
- 修回日期: 2006-01-11
- 刊出日期: 2006-10-28

Effects of mean stress and its scatter on vibrational reliability of structures

School of Jet Propulsion, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

摘要

摘要: 基于传统的结构振动分析,利用Goodman曲线和应力-强度干涉理论,将结构的平均应力及其分散性的影响引入结构振动可靠性模型。结合其它相关参数的分散性,分别建立了平均应力为定值和随机变量时的结构振动可靠性模型,给出了可靠度计算的相应表达式及分析流程。计算实例与Monte-Carlo仿真比较,表明该模型合理可行,计算结果表明,平均应力及其分散性的增加使得可靠度降低。
- 航空、航天推进系统 /
- 结构振动 /
- 可靠性 /
- 平均应力 /
- 疲劳强度
Abstract: Based on traditional structural vibration analysis,the effects of mean stress and its scatter have been introduced into the vibrational reliability model of structures by use of Goodman curve and the interference theory of stress and strength.Combined with other relative parameters' scatter,the vibrational reliability model has been established separately while considering mean stress to be deterministic and stochastic,and the corresponding formulations and procedures for reliability computation have been presented.Compared with Monte-Carlo simulation,the numerical results indicate that the model proposed in this paper is reasonable and feasible,meanwhile they also indicate that reliability decreased as the mean stress and/or its scatter increased.

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参考文献(8)

[1]	宋兆泓主编.航空发动机典型故障分析[M].北京:北京航空航天大学出版社,1993.Song Zhaohong.Typical failure analysis of aeroengine[M].Beijing,Beijing University of Aenonautics and Astronatics Press,1993.
[2]	吕震宙,冯元生.工程结构振动可靠性分析方法初探[J].机械强度,1993,15(2):1-6.Lu Zhenzhou,Feng Yuansheng.A Preliminary analysis method for reliability of structural vibration[J].Journal of Mechanical Strength,1993,15(2):1-6.
[3]	田爱梅,王延荣.构件振动可靠性设计方法初探[J].航空动力学报,1999,14(3):320-322.Tian Aimei,Wang Yanrong.Preliminary research on reliability design method of mechanical component vibration[J].Journal of Aerospace Power,1999,14(3):320-322.
[4]	Mark A Cesare,Robert H Sues,Y-T (Justin)Wu.Probabilistic high cycle fatigue (HCF) of jet engine blades[R].AIAA-2001-1379.
[5]	史进渊,林振坤,龚汉声.透平机械零件振动的可靠性设计[J].航空动力学报,1995,10(3):263-266.Shi Jinyuan,Lin Zhenkun,Gong Hansheng.Reliability design of turbine part vibration[J].Journal of Aerospace Power,1995,10(3):263-266.
[6]	欧阳德,孔瑞莲,宋兆泓.叶片振动可靠性评估方法研究[J].航空动力学报,1998,13(2):161-164.Ou Yangde,Kong Ruilian,Song Zhaohong.An assessment method for blade vibration reliability[J].Journal of Aerospace Power,1998,13(2):161-164.
[7]	王延荣,田爱梅.结构振动可靠性设计方法研究[J].航空动力学报,2003,18(2):191-194.Wang Yanrong,Tian Aimei.Research on reliability design method of structural vibration[J].Journal of Aerospace Power,2003,18(2):191-194.
[8]	李宏新.某型机带凸肩风扇叶片断裂故障研究与振动可靠性评估[D].北京:北京航空航天大学,2000.Li Hongxin.Research on fault of fan blade with mid-span shrouds in a turbofan engine and estimation of vibration reliability[D].Beijing:Beijing University of Aeronautics and Astronautics,2000.