航空学报 > 2002, Vol. 23 Issue (3): 252-254

具有独立失效模式的多自由度非线性振动系统的可靠性分析

张义民1, 闻邦椿2   

  1. 1. 吉林大学南岭校区力学系, 吉林长春 130025;2. 东北大学机械工程与自动化学院, 辽宁沈阳 110006
  • 收稿日期:2001-06-07 修回日期:2001-07-24 出版日期:2002-06-25 发布日期:2002-06-25

RELIABILITY ANALYSIS OF MULTI-DEGREE-OF-FREEDOM NONLINEAR VIBRATION SYSTEMS WITH INDEPENDENCE FAILURE MODES

ZHANG Yi-min1, WEN Bang-chun2   

  1. 1. Department of Mechanics, Jilin University, Changchun 130025, China;2. School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110006, China
  • Received:2001-06-07 Revised:2001-07-24 Online:2002-06-25 Published:2002-06-25

摘要:

对不考虑失效模式相关性的多自由度非线性随机振动系统可靠性进行了研究。在结构系统响应和状态函数的前四阶矩的一般数学表达式的基础上,使用 Edgeworth级数把未知响应和状态函数的概率分布展开成标准的正态分布表达式,并放松了对随机参数的分布概型和激励类型的限制,从而确定了系统的可靠度。

关键词: 随机参数, 多自由度非线性振动系统, 可靠度, 四阶矩技术, Edgeworth级数

Abstract:

The reliability analysis of uncertain multi degree of freedom nonlinear vibration systems with independence failure modes subjected to random excitation is examined. A statistical fourth moment method is developed to determine the first four moments of the system response and state function. The distribution function of the system response and state function is approximately determined by the standard normal distribution functions using Edgeworth series, and its reliability is obtained.

Key words: random parameters, multi-degree-of-freedom nonlinear vibration systems, reliability, statisticalfourth-moment method, Edgeworth series