基于Kriging模型的非概率可靠度计算

Non-probability reliability calculation based on kriging model

Kriging模型可以适应各种极限状态函数,HL-RF修正算法可以有效地计算非线性问题。对于难以获得极限状态函数的结构,提出了用Kriging模型进行回归拟合极限状态方程,同时使用HL-RF修正算法计算结构的非概率可靠度指标的计算方法。数值算例以及球形压力容器可靠性分析表明,本文提出的计算方法具有求解精度好、适应能力强的特点。

Kriging model can well be suitable for kinds of limit state functions,and HL-RF modified algorithm is used to solve nonlinear problems.When the limit state function of structure is difficult to obtain,Kriging model is proposed to fit the actual limit state function.Meanwhile HL-RF is used to calculate the non-probabilistic reliability index.Numerical examples and reliability analysis of spherical pressure vessel demonstrate that the method presented in this paper is of high precision and well adjustment.