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| An efficient spectral method of ice-induced fatigue analysis for complex tubular joints |
| Received:December 06, 2008 Revised:November 18, 2009 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20103004 |
| KeyWord:fatigue analysis tubular joint pseudo excitation method ice force spectrum1 |
| Author | Institution |
| 刘翔 |
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 |
| 刘圆 |
中国船级社 天津分社,天津 |
| 岳前进 |
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: |
| Ice-induced fatigue of the tubular joints is one of the key factors that threaten the safety of the jacket platforms in Bohai Gulf. Fatigue analysis is generally a complicated and time-consuming procedure, which deals with large numbers of calculations of the hot spot stress under all possible environmental load cases, particularly for the huge structures with complex tubular joints. In this paper, the authors propose an efficient approach to the ice-induced fatigue analysis for irregular and complex tubular joints. In order to improve the efficiency of fatigue analysis with satisfying accuracy, a mixed finite element model is employed to simulate the global structure and the local tubular joints, and the pseudo excitation method is used to calculate the power spectral density of the hot spot stress. The ice-induced fatigue analysis of a real platform demonstrates the feasibility and applicability of the proposed method, which can be extended to fatigue analysis of other structures subjected to cyclic loads. |
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