带有中间支骨环肋圆柱壳应力修正系数的研究

本文主要研究了带有中间支骨的环肋圆柱壳在均匀静水压力作用下，应力计算时所出现的一些问题。由于高强度钢材的屈服极限不断地增大，下潜深度的不断增加，弯曲微分方程解的形式将不仅限于复数解。随着不同的结构尺寸及外载荷的变化，将会出现实数解及虚数解。本文分析了各种形式解的力学意义，推导了各种解的具体形式，确定了应力计算中各取值范围应力修正系数。通过与现有计算方法计算结果的比较发现，当肋骨尺寸较小时，其结果差异较大。同时论证了中间支骨是考虑到稳定性因素而加设的，但是它对结构的强度也起到了加强作用。

Stress modification coefficients for ring-stiffened cylindrical shell with intermediate stiffer

Some questions of ring-stiffened cylindrical shell structure with intermediate stiffer are studied,which are under the static water pressure. Increasing the yield limit of high strength steel, and increasing the depth of submergence ,the form of the differential equation's result will not only be limited with the complex number. With the varieties of the different structural dimension and outer load, it will be real number and imaginary number. The physic meaning and the forms of the different results are analyzed. And the ranges of the stress modification coefficients are deduced. Comparing with results of the present calculation method, the difference of this result is bigger when the dimensions of the ribs are smaller. And it is shown that intermediate stiffeners can improve the stability of the ring-stiffened cylindrical shell as well as have favorable effects on general strengths of cylindrical shell.