航行工况下自升式风车安装船强度直接计算研究

自升自航式风车安装船为海洋工程专业特种船舶，在风机运输，安装中有很高的实际利用价值。采用直接计算法，对航行工况下自升自航式风电安装船的总强度进行评估。建立了船体和桩腿的有限元建模，基于三维势流理论对波浪垂直弯矩进行长期预报，得到风车安装船在典型装载工况下的设计波参数，将船舶在设计波中的重力、静水压力、水动压力、惯性力等施加到模型上进行直接强度分析，对航行工况下船体和桩腿的强度进行了校核。本文的计算方法及结果可为自升自航式风车安装船的整体强度评估、船体结构优化提供有效依据，并且对同类工程船的设计开发具有指导意义。

Direct strength calculation analysis of self-elevating wind turbine installation vessel in transit condition

The self-elevating self-propelled offshore wind turbine installation vessel(WTIV) is one kind of special ships for offshore engineering, which can load, transport and install wind turbine equipments at offshore locations all in one. By using direct calculation method, the global strength of the wind turbine installation vessel was evaluated in the transit condition. Based on the three-dimensional potential flow theory, long-term forecast of the vertical wave bending moment were carried out, and the corresponding designed wave parameters are determined. Based on the finite element model of the hull and lattice legs, the gravity, hydrostatic pressure, the hydrodynamic loads induced by the wave, inertia force and the wind force on the legs and hull were considered, and the direct calculated method was used to evaluate the global strength of the hull and legs. The proposed method and results are effective for strength assessment of wind turbine installation vessel, and provide a reference for the global response analysis and the optimization design of the hull structure of this kind.