最优化法在计算平台破损后浮态及初稳性中的应用

Optimization Method for Computation of Intact and Damage in Floating State of Platform and Its Initial Stability

提出了一种用优化方法求解平台破损进水后浮态和初稳性的方法,并用所编制的计算机程序对平台破损后的浮态和初稳性进行了计算。文中给出了某一平台在下沉就位过程中的计算实例,计算结果表明:利用优化方法来求解平台破损进水后的浮态和初稳性是切实可行的.

The suggested method to calculate stability of intact and demageon a floating offshore platform is derived from experience with ships.Thispaper presents an optimization method for computing the floating state of theplatform and its initial stability in an intact and damage condition.Using thismethod,the calculation results obtained will be more accurate than those obt-ained by methods derived from experience with ships.In the first part of thispaper,a set of equilibrium equations in theirs general form are established forthe platform in any floating state.Then the variables,parametes and objectfunction are established by using the pattern search of Hooke and Jeeves tosolve the floating state of intact or damage of platform and its initial stability.The computer program has been used on several platforms.One example ofthem is given in the last part of this paper.The obtained results showedthat the proposed method is reasonable and convenient.