防水型救生舱承压外壳理论计算与数值模拟

Theoretical calculation and numerical simulation of waterproof refuge chamber shell

采用理论计算与数值模拟相结合的方法,研究防水型救生舱外壳的承压性能。基于潜艇设计原则,分析决定救生舱承压性能的3个关键应力和2个临界载荷,并给出其计算方法。通过研究承压外壳的4个影响因素即舱体半径、壳板厚度、肋骨间距、肋骨型材对应力及稳定性的影响方式,最终提出一套防水型救生舱外壳的设计方案。通过数值模拟对该方案进行验证。结果表明:该方案环肋骨加强的圆柱壳最大形变量为0.6 mm,最大应力为166 MPa,均在壳体可承受范围之内,能够承受2.5 MPa的静水压力,并根据此方案生产出了可防透水事故的救生舱新产品。

Bearing pressure performance of shell waterproof refuge chamber was studied by theoretical calculation combined with numerical simulation. Referring to submarine knowledge, three key stresses and two stability loads which are closely related to the performance were identified. After analyzing the ring stiffened cylindrical shell, four factors were taken into consideration： cabin radius, shell thickness, stiff- ener space and stiffener shape. Ways that the four factors influence the stresses and the stability of the shell were studied. A design scheme was worked out for waterproof refuge chambers. Finally, a numerical simulation was conducted using ANSYS. The results show that for the shell designed according to the scheme, the maximum deformation is 0.6mm and the maximum stress is 166MPa.