何志豪, 王芳, 李友洁. 深海全通透耐压壳蠕变分析. 力学与实践, 2024, 46(3): 1-11. DOI: 10.6052/1000-0879-23-632
引用本文: 何志豪, 王芳, 李友洁. 深海全通透耐压壳蠕变分析. 力学与实践, 2024, 46(3): 1-11. DOI: 10.6052/1000-0879-23-632
He Zhihao, Wang Fang, Li Youjie. Analysis on creep deformation of deep-sea fully-transparent pressure-resistant hull. Mechanics in Engineering, 2024, 46(3): 1-11. DOI: 10.6052/1000-0879-23-632
Citation: He Zhihao, Wang Fang, Li Youjie. Analysis on creep deformation of deep-sea fully-transparent pressure-resistant hull. Mechanics in Engineering, 2024, 46(3): 1-11. DOI: 10.6052/1000-0879-23-632

深海全通透耐压壳蠕变分析

ANALYSIS ON CREEP DEFORMATION OF DEEP-SEA FULLY-TRANSPARENT PRESSURE-RESISTANT HULL

  • 摘要: 有机玻璃 (polymethyl methacrylate, PMMA) 是一种透明高分子化合物,具有透明性好、耐腐蚀、重量轻、机械强度优异等优点,可作为全通透潜水器耐压壳体材料的候选材料。PMMA是一种黏弹性材料,当经受长时间的外界高压作用时,由PMMA制成的耐压结构可能发生蠕变,导致其承载能力下降。本文对PMMA耐压壳体进行了有限元分析,基于温度相关的时间硬化蠕变模型,获得了壳体的蠕变变形,并研究了不同类型无开孔和有开孔的耐压壳体的蠕变特性,分析了不同压力和温度下PMMA耐压壳体的应变-时间曲线和位移曲线。分析结果将为大深度载人潜水器全通透耐压舱的设计提供理论参考。

     

    Abstract: Polymethyl methacrylate (PMMA) is a kind of transparent polymer compound with good transparency, corrosion resistance, light weight, and excellent mechanical strength, which can be the candidate fully-transparent pressure-resistant hull material of submersibles. PMMA is a viscoelastic material, and when subjected to prolonged external high pressure, the pressure-resistant structure made of PMMA may undergo creep deformation, resulting in a decrease in its load-bearing capacity. In the present study, finite element analyses on the PMMA pressure-resistance hulls are conducted aiming at obtaining the creep deformation based on temperature-dependent time-hardening creep model from a series material tests. The creep properties of different types of spherical hulls without or with large openings are studied. And the strain-time curves and displacement curves of PMMA pressure-resistant hulls under varying pressures and temperatures are analyzed. The analysis results will provide reference for design of full-transparent manned cabin in deep-sea submersibles.

     

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