摘要
基于弹性薄板理论分析提出了应用模态分析确定多孔板有效弹性常数的新方法,根据刚度叠加原理,导出了复式圆孔支撑板有效弹性常数计算公式。基于模态分析法和大量数值模拟结果给出了具有普适性的、以质量分数为参量的蒸汽发生器三叶孔、四叶孔支撑板有效弹性常数计算公式。工程计算实例表明,现有基于圆孔的有效弹性常数计算曲线不宜用于非圆孔形的蒸汽发生器支撑板和管板设计。
Based on the theory of elastic plates and shells, the concept of equivalent isotropic solid plate elaborated for perforated tubesheet, the new methodology to determine the effective elastic constants by modal analysis of such plates is described. The con^puting formula of effective elastic constants for plates with hetero-diameter dual-holes are given in terms of the stiffness superposition method. By modal approach, the effective elastic constants of support plates with various perforation shapes popularly used in steam generator, such as hetero-diameter holes, trefoil and quatrefoil holes, are obtained. The universal relationship between the effective elastic constants and the mass fraction are established, which can be used for perforated plates with any arbitrary hole shape. The study results indicate that the curves for calculating effective elastic constants adopted in ASME are improper in non-circular hole perforated plates and shall not to be applied in the support plates and tubesheet of steam generator.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2008年第2期48-51,96,共5页
Nuclear Power Engineering
基金
河南省杰出人才创新基金资助项目(0221000600)
关键词
蒸汽发生器
多孔板
支撑板
有效弹性常数
模态分析
Steam generator, Perforated plate, Support plate, Effective elastic constants, Modal analysis
