NEW METHOD FOR STRAIN-BASED FATIGUE RELIABILITY ANALYSIS OF MECHANICAL STRUCTURE
A sequential response surface method based on two-phase criterion of convergence was adopted to evaluate strain-based fatigue reliability of mechanical structure. A program based on Visual C++ and commercial finite element software ANSYS was developed for reliability analysis. An example problem in which random variables included material properties, geometric parameters and loading was carried out to demonstrate concepts. The importance sampling method that was combined with response surface method was also discussed. Monte Carlo method was applied to verify the results. These results corresponded quite well. The response surface method and the importance sampling method combined with it are suitable for strain-based fatigue reliability analysis with less computational efforts and higher efficiency. The latter also has enough accuracy for reliability problem with nonlinear limit state equation, and it can evaluate the analytical precision by the variation coefficient of results. The suggested approach is suitable for engineering application because the response surface method can be utilized in conjunction with commercial finite element analysis programs that are widely used.
Ren Yuan Bai Guangchen
School of Jet Propulsion, Beijing University of Aeronautics and Astronautics Beijing, 100083 P.R.China
国际会议
昆明
英文
163-169
2006-09-18（万方平台首次上网日期，不代表论文的发表时间）