摘要
在统计矩点估计法和模糊随机理论的基础上,提出了楔形体模糊随机可靠性分析改进的模糊点估计法,将楔形体稳定极限状态方程由模糊随机集向普通随机集转化,首先采用Bayes推断方法求解小样本条件下结构面力学参数的概率分布函数,用正态模糊数对随机变量进行模糊随机化处理,然后利用模糊点估计法求解楔形体的可靠度指标。算例分析结果表明,该法使用简便,结果可靠,更能客观地反映楔形体的真实状态,从而为工程决策提供依据。
The fuzzy point estimate method of the wedge reliability evaluation was presented in the base of the statistical moment point estimate method and fuzzy cut sets theory. The wedge stability limit state equation is transformed from fuzzy random set to normal random set. The point estimation method is used to solve the wedge reliability indexes. Firstly, the Bayes method is used to solve the probability distribution function under small sample conditions of structure surfaces mechanical parameters. Normal fuzzy number is used to make the random variable fuzzy and the point estimation method is used to solve the wedge reliability indexes. Analysis of the results showed that the method is simple, reliable, and can more objectively reflect the reality of wedge body so as to provide the basis for the engineering decision.
出处
《地质科技情报》
CAS
CSCD
北大核心
2012年第4期111-116,共6页
Geological Science and Technology Information
