应用响应面方法结合空间映射方法的可靠性评价

RELIABILITY EVALUATION USING RESPONSE SURFACE METHODOLOGY COMBINED WITH SPACE MAPPING TECHNIQUE

应用响应面结合空间映射方法,在第1次迭代拟合极限状态函数,其它迭代应用映射技术在第1迭代响应面基础上映射调整得到新的极限状态函数,并进行可靠性分析.这样就改变了序列响应面方法评价可靠性时需要反复对模型进行试验设计、分析并拟合极限状态函数的执行过程,从而大大降低了模型分析的计算量.

A new method for reliability evaluation is proposed, in which Space Mapping technique is combined with Response Surface Methodology. In the new approach, the limit state function is only fitted once in the first iteration; in other iterations, Space Mapping technique is applied to map the original limit state function to the new ones. The new approach does not require experimental design, model evaluation and response surface fitting of the limit state function repetitively, which amounts to a great reduction of computational effort involved.