蛋形耐压壳力学特性研究

Research on mechanical properties of the eggshell-shaped pressure hull

深入研究了复合材料蛋形耐压壳的力学特性。首先建立蛋形耐压壳母线方程及解析法力学模型;在此基础上,推出极限强度载荷、屈曲临界载荷与厚度的定量关系式,以及厚度和浮力系数的求解方程,并研究了同比条件下球形耐压壳的力学特性。结果表明,蛋形耐压壳综合性能优于球形耐压壳,可最优协调强度稳定性、浮力系数、空间利用率、人机环特性以及水动力学特性,且对缺陷敏感性低,便于开孔、开窗,在深海潜水器上具有良好的应用前景。

Mechanical properties of the composite eggshell-shaped pressure hull were studied, and, the shape function and analytical mechanical models for the eggshell-shaped hull were proposed. On this basis, functions of ultimate strength load and critical buckling load with respect to thickness were derived, and equations involving thickness and buoyancy factor were also obtained. Afterwards, mechanical properties of the spherical pressure hull under the same condition were investigated. The results show that the eggshell-shaped pressure hull possess many advantages compared with the spherical pressure hull. It could be most optimally designed with coordinating strength, stability, buoyancy factor, interior layout, man-machine-environment characteristics and hydrodynamics. Futhermore, the eggshell-shaped pressure hull is an imperfection-insensitive structure, and is convenient to open holes and windows, which has a good application prospect on deep sea submersibles.