EXPLICIT ITERATION ALGORITHM
OF STRUCTURAL RELIABILITY

QIAN Yunpeng¹  HE Enshan¹  CHEN Fengxi²  LI Liangqiao²

(1. College of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004;
2. North China System Engineering Institute, Beijing 100089 )

Abstract: Based on the modified first order second moment method (MFOSM) of structural reliability, an explicit iteration algorithm is proposed, which can avoid solving struatural performance function to get reliability index β and is very convenient for computer programme. An approximate method resolving the problem that non-normal random variables can not be equivalent to normal distribution is also put forward. Then how to use the explicit iteration algorithm and general finite element method(FEM) software to calculate reliability is demonstrated, in which the effect of some random factors such as material, dimensions, loads, etc, can be logically considered and probability finite element method(PFEM) is unnecessary. The validity of the explicit iteration algorithm is illustrated through three examples finally.

Key words: Mechanology Reliability First order second moment Performance function Explicit iteration Finite element method

CLC No: TB114.3

总装备部可靠性共性技术预研资助项目(413190203). Received 20060220, received in revised form 20060928