ABSTRACT

The commonly used acrylic frustum windows are the weakest components in the deep-sea manned cabin of the submersible. The short-term collapse test is typically required by full or scale model test, which can applied to measure the critical pressure but cannot tell when the structure begins to damage and how the damage continues. To make up for the deficiency, it is necessary to develop the design-by-analysis methodology. In this paper, numerical analysis for the pressurisation process of the frustum windows considering two failure criteria is carried out to capture the initial failure pressure and location. An effective way to study the detailed failure status and failure process of window under pressurisation is provided. The results are regressed as functions and compared with the values of conversion factor applied in window’s design based on ASME specification, which will provide reference for safe design based on determining safety factor reasonably.

摘要

常用的亚克力截头窗是潜水器深海载人舱中最薄弱的部件。短期倒塌试验通常需要全尺寸或比例模型试验，可用于测量临界压力，但不能判断结构何时开始损坏以及损坏如何继续。为了弥补这一不足，有必要开发分析设计方法。在本文中，对考虑两个失效准则的截锥窗加压过程进行了数值分析，以捕获初始失效压力和位置。为研究加压下窗的详细失效状态和失效过程提供了一种有效的方法。