Research Article | OPEN ACCESS
Study on Spectral Fatigue Assessment of Trimaran Structure
1Khurram Shehzad, 1Ren Huilong, 1FengGuoqing and 2Asifa Khurram
1Department of Shipbuilding Engineering
2Department of Materials Science Engineering, Harbin Engineering University, Harbin 150001, China
Research Journal of Applied Sciences, Engineering and Technology 2013 3:1015-1021
Received: June 28, 2012 | Accepted: July 28, 2012 | Published: January 21, 2013
Abstract
This study presents fatigue strength assessment of the trimaran platform by the spectral approach. Spectral fatigue calculations are based on complex stress transfer functions established through direct wave load analysis combined with stress response analysis. In this study, ANSYS software with 3 dimensional linear sea-keeping code AQWA is used to compute frequency response functions of the vessel at zero forward speed. Finite element analysis of global trimaran structure is performed in ANSYS software utilizing hydrodynamic wave loads. Hot spot stress approach is used to compute stress transfer functions of the selected critical details. A MATLAB program, based on direct calculation procedure of spectral fatigue is developed to calculate total fatigue damage using wave scatter data of North Atlantic. Damage incurred during individual heading direction is also calculated and presented by means of polar diagrams to study its contribution towards cumulative fatigue damage.
Keywords:
Finite element, hot spot, spectral fatigue, stress response, trimaran,
Competing interests
The authors have no competing interests.
Open Access Policy
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Copyright
The authors have no competing interests.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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