基于强度稳定综合理论的深海潜器耐压圆柱壳极限强度的解算

Ultimate strength calculation of pressurized cylindrical shells in a deep-sea vehicle by the comtined theory of strength and stability

通过对弹性基础梁复杂弯曲综合因子N的研究,得以应用强度稳定综合理论的解析法对弹性基础梁复杂弯曲的稳定性进行计算.由于圆柱壳轴对称失效变形的微分方程可化为复杂弯曲的弹性基础梁的微分方程,于是圆柱壳和加肋圆柱壳壳板失稳的临界应力公式也可以由此方法得出.最后通过与高强钢的加肋圆柱壳的实验结果和已有工作比较,证明了强度稳定综合理论方法在圆柱壳结构壳板稳定性计算上的适用性.

Based on the research of the N-factor of elastic foundation beams, the combined theory of strength and stability （CTSS） was used to calculate the ultimate strength of the beams. The differential equation of a cylindrical shell under axial symmetric deformation was translated into the differential equation of complicated curved beams onthe elastic foundation; then the critical stress formula of a cylindrical shell and stiffened cylindrical shell was ob- tained. Finally, comparing the result of the testing of the stiffened cylindrical shell and the work of existing refer- ence, it was shown that the method of CTSS can be applied to predict the ultimate strength of cylindrical shells.