小潜深充压式轻质防水耐压舱设计及分析

基于跨介质飞行器对小潜深、轻量化、严密封的综合控制舱的迫切需求，设计了一种充压式复合材料防水耐压舱。通过预先充入2 MPa气体产生内压以抵抗水下200 m附近工作时的外部静水压力，使舱体处于轻微受力状态，最大程度减小舱体壁厚，进而实现轻量化设计。开展舱体纤维铺层角度和铺层厚度等设计，建立有限元模型，对其刚度、强度和稳定性进行校核，并通过5轮充压2 MPa并浸泡、保压48 h测试，验证结构安全性和密封可靠性。设计的3 L容积耐压舱总质量仅390 g,比常规结构减重22.4%。本方法有望为后续跨介质飞行器控制舱设计提供参考。

Design and Analysis of Lightweight Waterproof Pressure-filled Cabin for Small Submersible Depth

Based on the urgent demand of trans-media vehicle for small submersible, lightweight and tightly sealed comprehensive control cabin, a kind of pressure-filled waterproof composite pressure cabin is designed. By filling 2 MPa gas in advance to generate internal pressure when working near 200 m underwater, the cabin is in a slight stress state, and the wall thickness of the cabin is reduced to the greatest extent, thus the lightweight design is realized. The design of fiber laying angle and thickness of cabin is carried out, and the finite element model is established, and its stiffness, strength and stability are checked. The structural safety and sealing reliability are verified by 5 rounds of pressure test for 48 hours. The total weight of the designed 3Lvolume pressure chamber is only 390 g, which is 22.4% less than that of the conventional structure. This method is expected to provide a reference for the subsequent control cabin of trans-media vehicle.