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| Reliability analysis on bolted flange connection of underwater vehicle |
| Received:July 28, 2020 Revised:September 08, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20200728001 |
| KeyWord:underwater vehicle nonlinearity of connection hydrodynamic load limit state surface reliability analysis |
| Author | Institution |
| 聂肇坤 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室, 大连 |
| 曾岩 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室, 大连 |
| 李刚 |
大连理工大学 工程力学系 工业装备结构分析国家重点实验室, 大连 |
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| Abstract: |
| Friction, contact, clearance, and pretension in a bolted flange connection lead to nonlinear dynamic response of underwater vehicles in complex mechanical environment.The connection may be destroyed in the response.The maximum internal force responses of the structure in a specified period are often applied to the connection structure for reliability analysis, which makes the design conservative.To solve this problem, this paper analyzes the maximum Mises stress response and establishes the limit state surface of the bolt-flange connection under the combined internal forces of an underwater vehicle subject to random hydrodynamic load.Reliability analysis of the bolted flange connection is made by using the maximum entropy method.To improve the efficiency of the reliability analysis, a new method based on the equivalent bending moment is proposed for engineering reliability analysis, according to the linear correlation of various internal forces on the end face of the connection near the plastic limit state surface.The accuracy of the proposed method is verified, via comparison with numerical simulation results. |
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