For warships with long superstructure and complex cabin structure, the obvious stress concentration at the superstructure end had generally led to serious fatigue problem.
Taking a certain type of warship as an example, this paper had determined the serious fatigue problem of the joint of the superstructure end and the main hull by finite element calculation of the whole ship. Comparing the fatigue life of different structures, this paper provided an optimum structural design scheme for typical nodes of warship’s superstructure end.
A real scale model fatigue experiment was designed in the research of this paper to obtain the fatigue life of nodes under typical load conditions, followed by the fitting of an S-N curve based on least square method and maximum likelihood method accordingly. The typical node’s fatigue strength was evaluated based on the fitted S-N curve. The fatigue life results were compared with those based on the existing S-N curves of CCS (China Classification Society) rules.
The assessment results indicated that the fatigue life obtained by the experimental fitting S-N curve was larger. The experimental results and the fitted S-N curve have certain reference significance for the structural design based on fatigue strength of the ship’s superstructure.
Optimization of Superstructure Connection Design Base on Fatigue Strength Analysis
Lecture Notes in Civil Engineering
Practical Design of Ships and Other Floating Structures ; 2019 ; Yokohama, Japan September 22, 2019 - September 26, 2019
2020-10-04
11 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Fatigue life prediction at a ship deck/superstructure intersection
Tema Archiv | 1990
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