Results 221 to 230 of about 12,796 (256)

Site-dependent reliability of a mobile jack-up platform

Marine Structures, 1995
Abstract The site-dependent response characteristics of a jack-up platform operating at two different locations in the North Sea are investigated. Both the water depth and wave environment differ at the two sites. The effect from uncertainty in boundary conditions at the platform base on the natural frequencies and dynamic amplification factors is ...
Bernt J. Leira, Daniel Karunakaran
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First Jack-Up Production Platform In North Sea

Offshore Technology Conference, 1973
ABSTRACT This paper describes the platform design engineering aspects of Amoco's jack-up gas production platform which was installed in August, 1972. It is the first jack-up production platform installed in the North Sea.
Alymer P. Cheng, Jerry F. Keleher
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Optimum Structural Design of the Hull on Jack-up Platform

Advanced Materials Research, 2013
The system design and optimization of the hull of a jack-up platform was presented in the paper, based on finite element method and size optimization theories. Three-dimensional model of the hull was made by the design parameters, the size and the layout of the various compartments were determined.
Wen Xian Tang, Zhen Xin Tang, Tian Xia, Jian Zhang   +3 more
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Topology optimization of jack-up offshore platform leg structure

Proceedings of the Institution of Mechanical Engineers, Part M: Journal of Engineering for the Maritime Environment, 2020
Jack-up platforms are commonly found in the costal or offshore environment for offshore oil and gas recovering. Pile legs are the main component of jack-up platform, which support the whole platform and suffer from the ocean environment load. Topology optimization method is proposed in this article to find an optimized shape for the leg by maximizing ...
Wei Deng, Xiaojie Tian, Xiangyu Han, Guijie Liu, Yingchun Xie, Zhixiong Li   +5 more
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Numerical Simulation of Cathodic Protection for Jack-Up Platform

Advanced Materials Research, 2013
For the jack-up platforms' huge size and complex structure, as well as the variation and complexity of their ambient corrosion environment, problems often arise in cathodic protection (CP) systems. The rise of the computer and the numerical simulation technology provide a new technical method to the prediction, evaluation and optimization of CP system ...
An Kang Hu, Yu Guo, Wei Wang, Wei Jiang
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System Identification of Jack-Up Platform by Spectral Analysis

29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 1, 2010
For the purpose of structural health monitoring (SHM), it is beneficial to develop a robust and accurate numerical strategy so as to identify key parameters of offshore structures. In this regard, it is difficult to use time-domain methods as the time history of wave load is not available unless output-only methods can be developed.
X. M. Wang, C. G. Koh, T. N. Thanh, J. Zhang   +3 more
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Wave Load and Structural Analysis for a Jack-Up Platform in Freak Waves

Journal of Offshore Mechanics and Arctic Engineering, 2009
This paper analyzed the effects of freak waves on a mobile jack-up drilling platform stationed in exposed waters of the North Sea. Under freak wave conditions, highly nonlinear effects, such as wave run-up on platform legs and impact-related wave loads on the hull, had to be considered.
el Moctar, Bettar Ould, Schellin, Thomas E., Jahnke, Thomas, Peric, Milovan   +3 more
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Research on the performance of a newly developed jack-up platform with separate foundation

International Journal of Computer Applications in Technology, 2013
In order to research the performance of the newly developed offshore jack-up platform with separate foundation, the overall performance of top and lower units, such as afloat stability, stability against overturning, and stability against sliding were analysed.
Yongjin Shi, Songsen Xu, Haiqing Tian
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The weldability of steels used in jack-up drilling platforms

Marine Structures, 1989
Abstract Weldability problems in jack-up rigs arise principally in leg construction where particularly high-strength steels (∼690 N mm−2 yield) are used for chords and racks. Attainment of mechanical properties is not usually difficult, although procedural trials are advisable.
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Overturning Reliability Analysis of Jack-Up Platforms Using Spreadsheet

Volume 2A: Structures, Safety and Reliability, 2013
In designing jack-ups to resist environmental loading, decisions are made under a great deal of uncertainty that may lead to a finite risk of exceeding limit states of the structures. In order to minimize the risks, conventional safety factors based on deterministic analyses, are commonly used.
Sirous F. Yasseri, R. B. Mahani
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