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。
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.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2006年第5期874-878,共5页
Journal of Aerospace Power
关键词
航空
航天推进系统
结构振动
可靠性
平均应力
疲劳强度
aerospace propulsion system
structural vibration
reliability
mean stress fatigue strength
