%0 Journal Article
%T 吊挂随机振动疲劳影响因素分析<br>Effect Factor Analysis of Random Vibration Fatigue of Missile Hanging
%A 罗杨阳
%A 倪樵
%A 陈铎民
%A 张翼
%J 机械科学与技术
%D 2016
%X 根据结构随机振动疲劳寿命的频域分析方法,采用有限元方法计算了某型导弹吊挂的随机振动疲劳寿命,同时研究了吊挂的结构参数对振动疲劳的影响。首先计算了结构的不规则系数;然后定量分析了不同结构参数对疲劳寿命的影响;最后为了研究平均应力对随机振动疲劳寿命的影响,采用Goodman准则推导了结构的平均应力修正系数。研究结果表明应力响应标准差是影响吊挂振动疲劳寿命的主要因素;材料参数和模态阻尼对吊挂的疲劳寿命有着较大的影响;平均应力对疲劳寿命的影响也不容忽视。<br>In this paper, the fatigue damage of missile hanging under stochastic excitation is calculated with the finite element method, and the effect factors of the fatigue are also analyzed. First, the irregular factors and the root mean square (RMS) stress are calculated with the power spectral density method. Then the effects of the material parameters and modal damping of the structure are evaluated by random vibration analysis. At last, the mean stress correction coefficient is deduced with the Goodman method. The results show that the standard deviation of the stress responses is the principal factor that affects the fatigue life of missile hanging; material parameters and modal damping of the structure also influence the fatigue life to some extent; in addition, the effect of the mean stress cannot be ignored
%K 吊挂
%K 随机振动疲劳
%K 疲劳寿命影响因素
%K 有限元分析&lt
%K br&gt
%K effect factor analysis
%K fatigue damage
%K finite element method
%K missile hanging
%K power spectral density
%K vibration analysis
%U http://journals.nwpu.edu.cn/jxkxyjs/CN/abstract/abstract6403.shtml