Fatigue long term deck structural assessment based on dynamic stress response, of a 100000 CBM LPG carrier

  • Iulia Mirciu “Dunarea de Jos” University of Galati, Faculty of Naval Architecture, Romania
  • Ionica Rubanenco “Dunarea de Jos” University of Galati, Faculty of Naval Architecture, Romania
  • Leonard Domnișoru “Dunarea de Jos” University of Galati, Faculty of Naval Architecture, Romania
Keywords: fatigue damage, life period, hot spot, stress concentration factor

Abstract

The purpose of this work is to analyse the fatigue damage at the joint between the main deck structure and the transversal web frame (near x/L=0.6) composed of butt weld plate joints, in order to estimate the initial design ship service life period. The analysis adopts the hot spot approach based on three dimensional finite elements. The stress concentration factor is estimated using a linearization of the calculated longitudinal normal stress and equivalent von Mises stress around the hot spot. Fatigue damage is calculated by Palmgreen – Miner method for the initial ship hull structure, based on the long-term prediction ship dynamic response, using the cumulative damage ratio criterion, for the North Atlantic and World Wide Trade wave significant height histogram. The numerical analyses are carried out for a large double hull LPG Carrier with 230.4 m length between perpendiculars.

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Published
2012-06-10
How to Cite
1.
Mirciu I, Rubanenco I, Domnișoru L. Fatigue long term deck structural assessment based on dynamic stress response, of a 100000 CBM LPG carrier. Annals of ”Dunarea de Jos” University of Galati, Fascicle V, Technologies in machine building [Internet]. 10Jun.2012 [cited 27Dec.2024];30(1):51-8. Available from: https://gup.ugal.ro/ugaljournals/index.php/tmb/article/view/1626
Issue
Vol 30 No 1 (2012)
Section
Articles