优化算法在可靠指标计算精度中的应用

The application of optimization method to improve the calculation accurcy of the reliability index

可靠指标的计算方法很多,但对于随机变量较少且非线性的功能函数,有些方法迭代不收敛,但可通过优化方法计算可靠指标β,并与其他计算方法进行比较,结果证明,优化方法原理简单,计算效率与结果准确度较高。

The reliability index β is computed by optimization method for improving high precision,which is suitable for few random variables and high non-linear function.Compared with other methods,the result shows：the method is simple,high efficient and precision.There are many methods on calculating the reliability index,but some of the methods can not converge for few random variables and high non-linear functions.The reliability index β is computed by optimization method for improving high precision.Compared with other methods,the result shows that the theory of this optimization method is simple,and calculation efficiency and accuracy are very high.