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Degree of bending (DoB) in jack-up unit tubular KK-joints under the axial, in-plane bending (IPB), and out-of-plane bending (OPB) loads.

Authors :
Gao, Jie
Duan, Menglan
Yuan, Ye
Source :
Ships & Offshore Structures; Jun2023, Vol. 18 Issue 5, p645-659, 15p
Publication Year :
2023

Abstract

The determination of degree of bending (DoB) is critical to improve the accuracy of estimating fatigue life using stress life (S-N) method. Based on the truss structure of jack-up unit, the numerical model of tubular KK-joints including rack plate (thickness is 180mm) is established. In the present research, the data extracted from 378 FE analyses on 108 tubular KK-joints models were used to study the effect of geometric parameters on DoB values of KK-joints under six different types of axial loading, IPB and OPB loadings. The geometric parameters affecting the DoB of tubular KK-joints are analyzed by multiple nonlinear regression analysis, and 21 parameter design formulas are obtained to calculate the DoB values of tubular KK-joints under axial loadings, IPB and OPB loadings. The established geometric parameter equation can effectively evaluate the fatigue characteristics of truss legs with rack plate of jackup unit. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
17445302
Volume :
18
Issue :
5
Database :
Complementary Index
Journal :
Ships & Offshore Structures
Publication Type :
Academic Journal
Accession number :
163695463
Full Text :
https://doi.org/10.1080/17445302.2022.2062164