Influencing factor analysis for direct calculation of trimaran structure's fatigue strength

Chunbo ZHEN; Tianlin WANG; Pengyao YU

doi:10.3969/j.issn.1673-3185.2017.03.012

Volume 12 Issue 3

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Chunbo ZHEN, Tianlin WANG, Pengyao YU. Influencing factor analysis for direct calculation of trimaran structure's fatigue strength[J]. Chinese Journal of Ship Research, 2017, 12(3): 86-90. doi: 10.3969/j.issn.1673-3185.2017.03.012

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Influencing factor analysis for direct calculation of trimaran structure's fatigue strength

doi: 10.3969/j.issn.1673-3185.2017.03.012

College of Traffic Equipment and Ocean Engineering, Dalian Maritime University, Dalian 116026, China

Received Date: 2017-02-12
Available Online: 2017-05-12
Publish Date: 2017-06-01

Abstract

This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

According to the problem of a trimaran cross-deck structure's fatigue strength, taking one trimaran as an example, the responses of ship motion and hydrodynamic pressure on the ship's surface in regular waves are calculated on the basis of the 3D linear potential flow theory. Next, the stress responses of hot-spots in regular waves with different wave angles are evaluated by the finite element analysis of the global trimaran structure. On the basis of linear cumulative damage theories, the fatigue damage is calculated according to the direct calculate method using spectral analysis. Finally, the effect of different sea areas and heading angles' time factors are discussed. The results show that the fatigue damage is greater when using an inshore sea area and considering the time factors of heading angles. The result can offer a reference for the design and development of trimarans.
- trimaran,
- hot-spot stress,
- spectral analysis method,
- fatigue strength assessment

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References

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