尿素合成塔球形封头人孔边缘应力分析

The Stress Analysis of the Edge of the Large Circular Hole on the Spherical Head of the Synthetic Tower of Urea

按无矩理论和有矩理论探讨了球形封头人孔处的应力计算问题，指出了人孔有凸缘按无矩理论求解，无凸缘按无矩理论和有矩理论求解的区别，提出了建立新的设计计算公式和新的设计准则的建议．

The problem of the stresses in the edge of the hole on the spherical head is discussed by the non-mement theory and the mement theory in this paper. Used these theories, the stresses in the convex edge of the hole and the plate edge of the hole are seperatly analysed, and the defference between them is pointed out. The new design method and the new criteria are indroduced.