基于DOE的核电站燃料组件贮存挂梁优化设计

Optimization design of nuclear power plant fuel assembly storage hanger beam based on DOE

为研究影响核燃料组件贮存挂梁结构承载能力的关键因素,建立了一套结合有限元分析与试验设计(DOE)的分析方法,对贮存挂梁结构和尺寸参数进行优化设计。部分析因分析结果表明,梁的截面长度、截面厚度和末端梁长L_(2)是影响组件最大Mises应力的最为重要的3个参数。相比之下,截面宽度、前端梁长L_(1)和梁高L_(3)对结构的最大Mises应力的影响效果并不显著。进一步地,采用中心复合设计对结构的应力值进行拟合分析,结果表明,截面长度×截面长度、截面厚度、截面厚度×截面厚度、截面长度×梁长L_(2)是Mises应力响应的重要模型项。当L_(2)固定时,截面长度和截面厚度之间存在一定的最优匹配值,使得结构获得最小的应力值。与之类似,当截面厚度一定时,适当的长度L_(2)和截面长度有利于结构获得最小的应力值。基于该分析结果,相应的结构已在工程实施中得到应用,满足使用要求。

In order to study the key factors affecting the bearing capacity of the nuclear fuel assembly storage hanger beam structure,a set of analysis method combining finite element analysis and design of experimental(DOE)was established to optimize the structure and size parameters of the storage hanger beam.The results of partial analysis show that the section length,section thickness and end beam length L_(2)are the three most important parameters which can affect the maximum Mises stress of the structure.In contrast,the effect of section width,front-end beam length L_(1)and beam height L_(3)on the maximum Mises stress of the structure is not significant.Furthermore,the center composite design was used to fit the stress values of the structure.The results showed that the section length×section length,the section thickness,the section thickness×section thickness and the section length×beam length L_(2)were the important models of Mises stress response.When L_(2)is fixed,there is an optimal matching value between the section length and the section thickness to obtain the minimum stress value of the structure.Similarly,when the section thickness is constant,the appropriate length L_(2)and section length are favorable to obtain the minimum stress value of the structure.Based on the analysis results,the corresponding structure has been applied in engineering implementation and meets the application requirements.