Analysis of Maximum Wind force for Offshore Structure Design

This paper presents the results of a study in which a method is developed for estimating maximum turbulent wind drag force acting on a floating offshore structure with low natural frequency. In evaluating the drag force, forces associated with turbulent wind speeds are considered using both the linear and nonlinear reliability analysis approaches. A mathematical wind spectral density formulation is employed. The probability density function applied for the maximum turbulent wind-induced drag force analysis is considered as a random process. The maximum wind force is analytically developed by using an approximate single term expression for the functional relationship between the wind speed and the associated turbulent drag force. At last, the probable maximum and the design maximum values are estimated by applying maximum value statistics and reliability analysis.