NDLI: A Preliminary Study Unveiling the Concept of Hemispherical Hull Structure for FPSOs With Special Emphasis on Fatigue Damage

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Kumar, M. Ashok Anbukumar, S. Srivastava, Amit Kumar
Copyright Year	2010
Abstract	FPSOs, moored permanently at deep seas, are more vulnerable to fatigue failures due to cyclic loads from environmental conditions and operating cycles. In welded structures, the fatigue crack initiation strongly depends on the structural geometry and the stress concentration. In this work, a parent conventional hull is taken and an equivalent hemispherical hull, which could be a refined shape hull structure with smooth transition joints, is created with equal volumes. In both the hulls, the common critical location selected for comparison is a stiffener on central girder of the hull structures and the fatigue damage at full load and ballast load conditions are calculated, for design life of 25 years, by using simplified fatigue assessment procedure and S-N curve. It is observed that the hemispherical hull structure components have higher fatigue capacity than the conventional hull structure.
Sponsorship	Ocean, Offshore and Arctic Engineering Division
Starting Page	363
Ending Page	368
Page Count	6
File Format	PDF
ISBN	9780791849101
DOI	10.1115/OMAE2010-20505
e-ISBN	9780791838730
Volume Number	29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 2
Conference Proceedings	ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering
Language	English
Publisher Date	2010-06-06
Publisher Place	Shanghai, China
Access Restriction	Subscribed
Subject Keyword	Cycles Stress concentration Seas Mooring Fatigue Fatigue failure Stress Girders Hull Design Geometry Shapes Fatigue damage Fatigue cracks
Content Type	Text
Resource Type	Article

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