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Numerical and Experimental Study on Trimaran Cross-Deck Structure’s Fatigue Characteristics Based on the Spectral Fatigue Method

1
College of Naval Architecture and Ocean Engineering, Dalian Maritime University, Dalian 116026, China
2
College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China
*
Author to whom correspondence should be addressed.
J. Mar. Sci. Eng. 2019, 7(3), 62; https://doi.org/10.3390/jmse7030062
Received: 25 January 2019 / Revised: 25 February 2019 / Accepted: 1 March 2019 / Published: 7 March 2019
(This article belongs to the Section Ocean Engineering)
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Abstract

Spectral fatigue analysis is performed on the trimaran cross-deck structural detail. A global finite element (FE) model with local fine meshes at hot spot locations is built for the calculation of structural response. Three-dimensional linear potential flow theory and global FE analysis are used for wave load and stress transfer function calculations. Then, the hot spots’ fatigue damage is calculated, considering various factors influencing spectral analysis, which includes cycle counting correction factors, wave scatter diagram, and the distribution coefficient of wave headings. A full-scale model fatigue test is used to investigate the fatigue behavior of the cross-deck structural detail. Using the fatigue test data, the S - N curve characteristic of the cross-deck structural detail is produced. Finally, the trimaran cross-deck structural detail’s fatigue characteristics are summarized and the effects of the factors influencing spectral fatigue analysis are reported. View Full-Text
Keywords: trimaran; spectral fatigue method; full-scale test; fatigue damage trimaran; spectral fatigue method; full-scale test; fatigue damage
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Zhen, C.; Feng, G.; Wang, T.; Yu, P. Numerical and Experimental Study on Trimaran Cross-Deck Structure’s Fatigue Characteristics Based on the Spectral Fatigue Method. J. Mar. Sci. Eng. 2019, 7, 62.

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