Fatigue studies based on real-time strain measurements on a stinger tubular joint

Conference paper (2016)

Authors

Natalia S. Ermolaeva Allseas Engineering
Yanrong Yu Allseas Engineering
Olympia Korakidou Allseas Engineering
Camilo P. Fernando Allseas Engineering
A. Romeijn Ship Hydromechanics and Structures - Mechanical, Maritime and Materials Engineering
Research Group
Ship Hydromechanics and Structures (Mechanical, Maritime and Materials Engineering) (TU Delft)
Fatigue damage Tubular joint Offshore structure Real-time strain measurements Strain concentration factor Strain range statistical distribution
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Published Date

2016

Language

English

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Marine and Transport Technology

Research Group

Ship Hydromechanics and Structures

Abstract

The paper presents a study related to fatigue performance of a structure, called 'stinger', being used as a support for offshore pipeline during installation from the board of a specialized vessel. Real-time strain measurements were set up on one of the tubular joints of the stinger. The measured data was processed and statistically analyzed after an appropriate filtering technique was developed. The measured nominal and local strain ranges at certain probability of the exceedance were used to derive the strain concentration factors (SNCF's) along the weld toe of the joint. Finite element (FE) models of the tubular joint were built using shell and solid elements, the latter comprising also the weld material. The SNCF values resulted from finite element analysis (FEA) were compared with those derived from measurements. Fatigue damage estimated based on histograms constructed on measured strain during a pipeline installation operation is discussed.

Files

16TPC_1222_1.pdf
(.pdf | 0.221 Mb)