环肋圆柱壳应力分析的一种新方法

A method for stress analysis of ring-stiffened cylindrical shell

本文将环肋圆柱壳分解为肋骨腹板、肋骨翼板和圆柱壳三个部分进行联立求解,获得环肋圆柱壳应力计算的一个比较精确的方法。通过实例计算并与规范中的计算方法[2]比较,可以观察到肋骨偏心对圆柱壳板和肋骨应力的影响,尤其是内、外肋骨布置方式引起的应力差异。对于大尺寸的内肋骨应力计算,规范方法可能会出现较大的不安全误差,应采用本文提出的新方法。

A new method was developed for the stress analysis of ring-stiffened cylindrical shell based on the solutions of the web,flange and cylindrical shell.The effects of the eccentricity of ring-stiffener on the stresses of cylindrical shell and ring-stiffener were presented by comparing the present results and the code calculations.The numerical example shows that the difference of the calculated stresses exists between the inner-stiffener and outer-stiffener of cylindrical shell.The present method is employed instead of the code calculation for stress analysis of the cylindrical shell stiffened by the big inner-stiffener because the code calculation gives the underestimation of the stresses.