摘要：进入二十一世纪，海洋开发成为世界各国关注的热点，深海载人潜水器是海洋科学考察的前沿与制高点之一，是进行国际海底资源调查和科学研究的重要高技术装备。耐压壳体是载人潜水器的关键部件之一，不仅给载人潜水器中的科学家、工程技术人员提供深海作业所必须的的生命保障，而且也为各种电子装置、特种设备提供了安全可靠的工作环境。本文围绕载人潜水器耐压壳体结构的疲劳可靠性进行了以下几项工作：

1)回顾了目前国内外著名的大深度载人潜水器，对耐压壳和结构疲劳可靠性的研究现状进行了调查分析，发现现役大深度载人潜水器的耐压壳体大多为球形耐压壳体，并将本文的载人潜水器耐压壳体结构确定为球形，使用有限元方法对其进行疲劳可靠性分析。

2)分析了载人潜水器耐压壳体结构在工作时所承受载荷的特点，确定耐压壳体结构的结构形式为球形耐压壳，并给出耐压壳体主要参数，基于理论方法和有限元分析软件分别对耐压壳进行强度计算与校验，证明耐压壳体结构满足强度规范要求。

3)依据CCS潜器结构规范，进行载人潜水器耐压壳体结构疲劳可靠性分析，基于有限元方法对耐压壳体结构进行疲劳分析，结果显示耐压壳体满足设计要求；采用应力-强度干涉模型对耐压壳体可靠性进行计算，给出耐压壳体疲劳可靠度。

关键词：载人潜水器；耐压壳体；结构强度；疲劳可靠性

ABSTRACT：In the 21th century, marine development has become a hot topic in the world. Deep sea manned submersible is one of the frontier and high ground of marine scientific investigation. It is important high-tech equipment for conducting international seabed resource investigation and scientific research. One of the key components, it not only to the manned submersible scientists, engineering and technical personnel to provide deep-sea operations necessary for the protection of life, but also for a variety of electronic devices, special equipment to provide a safe and reliable working environment. In this paper, the following work is carried out on the fatigue reliability of the manned submersible pressure shell structure:

1) This paper reviews the current research on the reliability of pressure shell and structural fatigue, and finds out that the pressure shells of large-scale manned submersible are mostly spherical and the fatigue resistance of the manned submersible can be determined by using the finite element method.

2) Analysis of the characteristics of the load of shell structure under manned submersible at work, determine the structure of the pressure hull structure for spherical pressure shell and spherical shell main parameters. Based on the theoretical calculation method and the finite element analysis software, Strength calculation and verification, proved that the pressure shell structure to meet the strength requirements.

3) According to the CCS submersible structure specification, the fatigue reliability analysis of the manned submersible pressure shell structure is carried out.

Based on the finite element method, the fatigue reliability of the pressure - resistant structure is calculated and analyzed. The results show that the  pressure

- resistant shell meets the design requirements. The stress-strength interference model is used to calculate the reliability of the pressure-resistant shell，finally, The fatigue reliability of the pressure resistant shell is given

Keywords: Manned submersible; Pressure resistant housing; Structural strength; Fatigue reliability

目录

第一章绪论 1

1.1选题背景