Journal of Offshore Structure and Technology
Volume 9, Issue 1 (2022)
Published
Table of contents
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ENERGY LOSSES IN FLOATING OFFSHORE WIND TURBINE WITH VARIABLE WIND DIRECTION
Abstract: The paper analyses the effects of the variation of wind direction onto the performance of a floating offshore wind turbine (FOWT). The evolution of the Cp coefficient is developed as a function of the velocity of the yaw angle correction when realigning the FOWT after a wind direction change. The results are computed for velocities correction of the yaw angle between 1º/min and 5º/min. A maximum drop of the Cp …
Published in Journal of Offshore Structure and Technology · Vol. 9, Issue 1, 2022 · pp. 1–16 Read article
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A Note On Design Methodology For Sheet Pile In A River With Large Tidal Variation
Abstract: The stretch of river Ganges from Kolkata to Haldia port experiences high variation of tide and occasionally experiences remarkable phenomena of bore tides which take place under the right hydraulic and astronomical conditions. A tidal bore, consisting of the head-wave of an advancing tide, hemmed in where the estuary narrows suddenly into the river moves rapidly up the river at speeds reaching 10 m/s. Further, the rise of water depth …
Published in Journal of Offshore Structure and Technology · Vol. 9, Issue 1, 2022 · pp. 17–33 Read article
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A Literature Review on structural analysis and design of offshore structure
Abstract: In the present give a review study on structural analysis and design of marine structures i.e. offshore structure. This review study deals with the structural geometry of compliant offshore platforms while emphasizing the design and development of these platforms rather than of fixed platforms. Investigations is carried out on the response control of a tension leg platform (TLP) and an articulated tower are presented. various control strategies that are commonly …
Published in Journal of Offshore Structure and Technology · Vol. 9, Issue 1, 2022 · pp. 34–36 Read article
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EFFICIENCY INCREASE IN MARINE WIND TURBINES
Abstract: The paper studies a method to increase the efficiency in floating marine wind turbines by modifying the pitch angle of the wind rotor blades to make the wind turbine operating at optimum conditions. The pitch angle is adjusted to its optimum value as a function of the tilt angle of the wind turbine mast when submitted to the wave movement. The analysis of the situation has led to a theoretical …
Published in Journal of Offshore Structure and Technology · Vol. 9, Issue 1, 2022 · pp. 37–49 Read article
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Analytically and Numerically Predicting Base Shear Coefficient of Building Structure with the Variations of Response Reduction Factor based on BNBC 2020 by using ETABS
Abstract: Response reduction factor (RRF) influences the building base shear. Soil profile and seismiczone factors affect the variations of RRF. According to Bangladesh National Building Code(BNBC 2020), three (ordinary, intermediate, and special) different values of RRF for themoment-resisting frame are used for four seismic zones. In the present research, analytical(BNBC 2020) and numerical (ETABS) base shear coefficient ratio (BSC) are evaluated bythe variations of RRF (1, 2, 3, 4, 5, 6, …
Published in Journal of Offshore Structure and Technology · Vol. 9, Issue 1, 2022 · pp. 50–55 Read article