Gradual method of the Laplace deploys quadraticly the non-linear structural function at the center of the checking computations,which can obtain better results.

• 应用数学逼近中的拉普拉斯渐进方法将非线性功能函数在验算点处作二次展开来研究结构的可靠度问题,能较高精度的逼近精确结果。