Non-probabilistic reliability analysis of spherical pressure hulls based on interval number theory

作者：Cao Anxi^*; Cui Weicheng

来源：Ship Building of China, 2014, 55(1).

• Deep manned submersible
• Interval number
• Non-probabilistic reliability
• Non-probability analysis
• Sampling information
• Satisfactory degree
• Spherical hull
• Uncertain parameters

Sampling information of uncertain parameters on deep-sea pressure hull is rare, which affects the reliability of pressure hull structures. A non-probabilistic reliability analysis method is applied. Interval number is used to describe uncertain parameter, while satisfactory degree of a statement, that the predicted collapse pressure interval is larger than the loading interval, is defined and considered as a probability index. The obtained probability index can be referenced by designers. A non-probability analysis of the spherical shell of "Jiaolong"manned submersible is performed, and the method is proved to be valid and practical.

• 单位
  上海海事大学; 上海海洋大学