Indexed by:期刊论文

Date of Publication:2013-12-01

Journal:MARINE STRUCTURES

Included Journals:SCIE、EI、Scopus

Volume:34

Page Number:74-87

ISSN No.:0951-8339

Key Words:S-lay operation; Stress concentration; Cyclic plastic deformation; Substructure experiment; FEM simulation

Abstract:In deepwater S-lay operations, the combined influences of stinger curvature, axial tension and roller support force can induce very large plastic deformation in the pipe. Dynamic loads from vessel motion and pipe sliding down the stinger lead the cyclic plastic deformation. This paper investigates the cyclic plastic stress history of the overbend pipe subjected to the dynamic pipelaying loading. The dynamic roller support forces are obtained through an innovative large scale hybrid substructure experiment constructed to simulate the pipe-stinger impact behavior. The measured roller forces are used to verify a 3D finite element analysis results developed with ABAQUS/Standard to observe the dynamic pipe stress history. The results confirm that the roller support can induce stress concentration in the pipe and the combined dynamic pipelaying loadings can cause extensive cyclic plastic deformation. (C) 2013 Elsevier Ltd. All rights reserved.