Title: Assessment of wind-induced responses for offshore jacket platforms based on high frequency force balance tests

Authors: Hongbing Liu; Guoming Chen; Liping Sun; Benrui Zhu; Ao Huang; Yipei Zhao

Addresses: College of Shipbuilding Engineering, Harbin Engineering University, No. 145 Nantong St. Harbin, China ' Centre for Offshore Engineering and Safety Technology, China University of Petroleum, No. 66 CJ, West Road, Qingdao, China ' College of Shipbuilding Engineering, Harbin Engineering University, No. 145 Nantong St. Harbin, China ' School of Civil Engineering, Tianjin University, No. 92 Weijin Road, Tianjin, China ' Centre for Offshore Engineering and Safety Technology, China University of Petroleum, No. 66 CJ, West Road, Qingdao, China ' Centre for Offshore Engineering and Safety Technology, China University of Petroleum, No. 66 CJ, West Road, Qingdao, China

Abstract: This paper focuses on the wind sensitivity of large offshore jacket platforms subjected to hurricanes, and a 1:100 scaled model is tested in a boundary wind tunnel under 0~360° wind directions using the high frequency force balance (HFFB) technique. Based on the experimental results, a corrected frequency-domain calculation method for evaluating wind-induced responses is derived, which can eliminate the resonance effects of the test model. The results show that: the first seven or higher-order mode combinations of platforms should be adopted to evaluate the dynamic wind-induced responses; the different mode coupling effects show a complicated pattern, especially in the across wind direction, and the complete quadratic combination method is suggested; the root mean square (RMS) displacement and acceleration of the derrick present approximate O shapes at different heights, and the maximum values reach 9.35 cm and 49.98 cm/s². Therefore, the wind-induced vibration of large offshore jacket platforms should be under stronger control to ensure their safety. [Received: April 15, 2018; Accepted: December 13, 2019]

Keywords: large offshore jacket platform; wind tunnel test; high frequency force balance; HFFB; wind load; wind-induced vibration; wind-induced response.

DOI: 10.1504/IJOGCT.2021.114060

International Journal of Oil, Gas and Coal Technology, 2021 Vol.26 No.4, pp.357 - 381

Accepted: 13 Dec 2019
Published online: 08 Apr 2021 *

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