Analysis of the working capability of active compensation gangways based on probabilistic methods
Active compensation gangways,as the core equipment for offshore wind power operation and maintenance(O&M),are primarily utilized to minimize the interference from complex and severe sea conditions on O&M processes,ensuring the smooth passage and safety of personnel.The analysis of working capability is a critical task during the design phase of active compensation gangways,aimed at investigating the capability of the gangways mounted on O&M vessels in the targeted wind field.By establishing the kinematic equations of the gangway's compensation movement,with given sea condition parameters as input,the time-domain simulation of active compensation motion response is conducted.Based on hydrographic data of the target wind field,the probability distribution of sea condition parameters is fitted,and considering the randomness of wave generation from wave spectra,the inaccessibility rate of the gangway is determined by probabilistic methods as an evaluation index for its working capability.For calculating the inaccessibility rate,a subset simulation-based method is proposed,expecting to compute the inaccessibility rate rapidly with fewer samples.Through multiple case analyses and comparisons with the Monte Carlo simulation method,the accuracy and speed of the proposed calculation method are validated.Moreover,by comparative analysis,the recommended values for the extreme value estimation parameters required for calculating the working capability of the gangway using simplified engineering methods are determined to be 3.7 times the standard deviation.
active compensationgangwayworking capabilityinaccessibility ratesubset simulation
NETL
NSTL
万方数据
