基于CFD方法求取带呆木船Xu回归公式

The Regression Formula for Ship with Dead Wood Based on CFD

摘要: 动力定位技术是海洋开发过程中的高新技术，其中供应船(尾部有呆木)为动力定位主流船型，研究其运动数学模型有重要意义。以带呆木船为研究对象，通过船型变换与呆木变换生成系列船型，基于CFD数值模拟船模在静水中的直航运动，得到系列船型在不同航速时所受到的水动力，利用最小二乘法拟合求得各船型的线性速度导数Xu。在此基础上，通过多元回归，得出了Xu关于船型参数与呆木参数的回归公式，可为设计阶段带呆木船的线性速度导数Xu提供简便的估算方法。

Abstract: Dynamic positioning technology is a high and new technology in the process of ocean development, of which the dynamic positioning supply vessel (attacked with wood in the tail) which is the main ship type has important implications for researching the motion mathematical model. Taking the ship appendaged with dead wood as the research subject, series of ship model is generated through hull form transformation. The CFD method is applied to numerically simulate the drag motion to calculate the hydrodynamic force on the models in different drift speeds. Then the linear velocity derivatives of different types by the least squares fitting are gotten. On this basis, the regression formula of location hydrodynamic derivatives is obtained through multiple regression. This provides an easy method to determine hydrodynamic derivatives in the preliminary design stage.