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]
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