Comparative Study of Spectral Fatigue Life Prediction of LCT Bottom and Deck Bracket

M. Nurul Misbah, Septia Hardy Sujiatanti, Raja Andhika Rizki Ramadhani

2018

Abstract

Many LCT ships are converted into passenger ship. The ship is operated and encountered cyclic loading. The cyclic loading is a vertical bending moment and the horizontal bending moment that randomly applied through the wave. These bending moments will affect a structural detail to have fatigue. Since these cyclic loadings are continuously applied and endangered the safety of the ship, then the calculations of fatigue are needed. Analysis of fatigue capacity using spectral fatigue is taking the variation of headings, load cases and wave spectrum for each sea state. Headings are started from head sea to the following sea with 45° increment which are represented headings while the ship is undergoing. The load cases are divided into the full load and full ballast condition. Wave spectrum is varied and started form 1 m significant wave height to 2,5 m significant wave height with 0,5 m increment and 5 s to 7 s with increment 1 s for zero-up crossing period. The analysis result is showing that maximum stress of the ship occurred at heading 135° or quartering sea. Based on the analysis result, the fatigue life of the ship will be 28 years and 22 years.

Paper Citation

in Harvard Style

Misbah M., Sujiatanti S. and Ramadhani R. (2018). Comparative Study of Spectral Fatigue Life Prediction of LCT Bottom and Deck Bracket.In Proceedings of the 6th International Seminar on Ocean and Coastal Engineering, Environmental and Natural Disaster Management - Volume 1: ISOCEEN, ISBN 978-989-758-455-8, pages 91-96. DOI: 10.5220/0008375200910096

in Bibtex Style

@conference{isoceen18,
author={M. Nurul Misbah and Septia Hardy Sujiatanti and Raja Andhika Rizki Ramadhani},
title={Comparative Study of Spectral Fatigue Life Prediction of LCT Bottom and Deck Bracket},
booktitle={Proceedings of the 6th International Seminar on Ocean and Coastal Engineering, Environmental and Natural Disaster Management - Volume 1: ISOCEEN,},
year={2018},
pages={91-96},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0008375200910096},
isbn={978-989-758-455-8},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 6th International Seminar on Ocean and Coastal Engineering, Environmental and Natural Disaster Management - Volume 1: ISOCEEN,
TI - Comparative Study of Spectral Fatigue Life Prediction of LCT Bottom and Deck Bracket
SN - 978-989-758-455-8
AU - Misbah M.
AU - Sujiatanti S.
AU - Ramadhani R.
PY - 2018
SP - 91
EP - 96
DO - 10.5220/0008375200910096