求解应力强度因子的一种新方法

本文介绍了求解混合型应力强度因子的一种新方法,即求解非线性方程组的随机方法——随机投点法。这种方法是在一个选定的区域内进行投点,每投一个点,计算一次目标函数的值,将所有的函数值进行比较,选出其中的最小值,再以这个函数最小值所对应的根为中心,选定一个区域,在此区域内投点,重复以上过程,这样循环往复、直到求出合适的值为止。这种方法形象直观,并且证明,它和其它好的算法一样,能得到满意的结果。

A New Method of Determining the Stress Intensity Factor

In this paper,a new method for determining the stress in- tensity factors is introduced.It is the random method for determining a set of non-linear equations,which is the random -throw-point method.This method is to throw points in a chosen region.Every time throwing a point,we calculate the value of objective function.Then we choose a region using the root which is corresponding to the value of minimum fun- ction as the centre and throw points repeating the above pro- cess until the suitable value is found.This method is impress- ive and intuitive.Facts have proved that the method is able to get the satisfactory results as well as all the good methods.