基于非概率区间模型的可靠性分析与优化

Reliability Analysis and Optimization Based on Non-probabilistic Interval Model

根据影响目标零件结构参数变化因素以及材料性能参数的区间特性,采用可靠性分析技术与结构优化方法,对目标零件结构的控制参数、材料强度及载荷分布等参量的不确定性进行分析,通过对非概率区间可靠性进行分析,构造出结构失效概率度量的可靠性指标,结合区间约束的n维复形调优算法,获得了结构参数的最优结果。以钢坯吊具钳板为例,验证了该方法的实用性和有效性。该方法为基于可靠性的产品设计提供了新的途径。

According to the fluctuating factors of the target components＇ structural parameters and the interval characterization of the material properties,this paper adopted reliability analysis and structural optimization method,and analyzed the control parameters,material strength and load distribution considering uncertainty of structural parameters of the target components.The reliability index with structural failure probability was constructed by using non-probabilistic interval reliability analysis.And combined with N-dimensional complex optimal algorithm with interval constraints,the optimal results were obtained.To billet slings clamp plate,for example,this method was proved to be practical and effective.And it is a new way of the reliability-based design.