Journal of Offshore Structure and Technology
Volume 3, Issue 3 (2016)
Published
Table of contents
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Comparative Study on Fatigue Analysis Methods using Turret-moored FPSO Model
Abstract: Abstract Floating structures are prone to fatigue due to high cyclic loads mainly caused by waves and changing loading conditions. Therefore, fatigue is an important criterion during design. The fatigue life is dependent upon factors such as global and local design, workmanship during construction, maintenance, corrosion protection, and trade and load history. Different approaches are applied to the fatigue strength assessment. Longitudinal stiffener end connections are also important structural elements …
Published in Journal of Offshore Structure and Technology · Vol. 3, Issue 3, 2016 · pp. 1–15 Read article
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Evaluation of Buckling Response on a Semi-Submersible Platform
Abstract: Abstract The primary aim of the present paper is to investigate the buckling strength assessment of a stiffened deck panel on a semi-submersible platform by means of the nonlinear finite element code ADVANCE ABAQUS. Comparison is performed with the PULS buckling code for stiffened panels. The cases studied correspond to in-plane bi-axial compression in the two orthogonal directions. An imperfection sensitivity study is also accounted for. The strength values from …
Published in Journal of Offshore Structure and Technology · Vol. 3, Issue 3, 2016 · pp. 16–24 Read article
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Q Anisotropy in the Region of Garhwal Himalaya
Abstract: Abstract Empirical relations have been found out to describe the decay in amplitude with distance of s-waves in the region of Garhwal Himalaya. These functions results from the analysis of spectral amplitudes of three component digital records from 19 local earthquakes obtained from 12-station seismological network deployed in the Garhwal lesser Himalaya. The events lie in a magnitude range from ML 2 to ML 4.5, epicentral distance 5 to 120 …
Published in Journal of Offshore Structure and Technology · Vol. 3, Issue 3, 2016 · pp. 25–31 Read article
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Aqua Search – A New Metaheuristic Modified Firefly Algorithm for Topology Optimisation of Continuum Structures
Abstract: Abstract The focus of the paper is to propose a new search algorithm which requires less computational effort to perform topology optimisation of continuum structures. The basic idea is based on performing underwater search operations by a group of divers in a school. This algorithm is named as Aqua Search (AS). The design domain here is compared to the water body. The AS algorithm is an improvement over the conventional …
Published in Journal of Offshore Structure and Technology · Vol. 3, Issue 3, 2016 · pp. 32–37 Read article
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Oil Price Volatility
Abstract: Abstract Over the last 14 months, the average price of oil has gone down by about 60%. Oil prices fluctuate for a numerous of reasons. To name few are like, rise in global economic activity can bring demand and hail prices higher, while increasing production rates can cause prices to decline as well; although simple economic supply and demand tales are useful in describing the oil price movements. Keywords: Oil …
Published in Journal of Offshore Structure and Technology · Vol. 3, Issue 3, 2016 · pp. 38–40 Read article