Application of Rough Set Theory in Stochastic Fatigue Analysis of Vehicle Frame
Considering the up-down deflection of vehicle frame as a random variable when a car runs unsteadily,the alternating stress cased by deflection is random.The probability density function is determined by date of the alternating stress acting on the frame.Using the concepts of upper and lower approximation in the rough set theory and confidence degree,random parameters of vehicle frame can be transferred into certain interval values.When the confidence degree took a value from 0 to 1,a series of intervals between the upper and lower approximation are determined respectively.With the algorithm of the interval operation,a method of fatigue analysis is put forward.
Fatigue random variable rough set finite element method
Lihui Zhao Changhong Liu
Automotive Engineering College, Shanghai University of Engineering Science; Shanghai, China School of Mechanical and Power Engineering East China University of Science and Technology, Shanghai
国际会议
厦门
英文
1814-1817
2012-01-04（万方平台首次上网日期，不代表论文的发表时间）