针对结构可靠性问题提出了一种新的基于同伦分析的功能度量法。该方法从结构可靠性问题的KKT条件出发,构造出相应的同伦方程组,并利用β-cone路径跟踪方法进行求解。算例分析结果表明,本方法对于不同非线性程度的极限状态方程具有稳健的收敛性。
In this paper, for the structural reliability problems, we introduce a new performance measure approach based on the homotopy analysis,denoted as the HOMO method. First we establish the Karush- Kuhn-Tucker (KKT) condition of the structural reliability problems,then construct the corresponding homotopy equations,and apply the β-cone path-tracking algorithm to solve the equations. Several exam- ples are provided to show that the method has robust convergence in solving the limit-state functions of different degree nonlinearity.