管板应力精细化分析统一理论简介

Introduction to Refined General Theory of Stress Analysis for Tubesheet

基于Ambartsumyan横观各向同性厚板理论,介绍了管板应力精细化分析的统一理论。与其他简化理论不同,精细化统一理论讨论更为一般的情形,即:考虑管板厚度方向与管板面内(横观)弹性常数的差异;考虑管板剪切应力的影响;考虑两管板材料、厚度、直径及周边约束条件不同的情况;考虑管程、壳程压力降(含流体重力)及换热管和壳体自重的影响。数值计算对比分析表明,对薄管板及厚管板的应力分布精细化统一理论预测结果与有限元分析结果符合得非常好,而ASME规范设计结果是不准确或错误的。

Based on Ambartsumyan＇s theory of thick transverse isotropic plate ,a refined general theory of stress analysis for tubesheet is introduced. The refined theory is different from existing simplified theories, that is the new theory considers more common situations such as unequal tubesheet thickness, different edge conditions, pressure drop and dead weight on two tubesheets, the anisotropic behavior of the tubesheet in thickness direction and transverse shear deformation in tubesheet. Numerical comparison results indicate that predictions given by this paper agree well with FEA for both thin and thick tubesheet heat exchangers,while ASME results are not correct or not accurate.