非线性兴波数值方法在高速三体船侧体布局方案比较中的应用

Application of the nonlinear wave making numerical method in the high-speed trimaran side hull position optimization

为使三体船侧体布局方案阻力性能比较更加可靠,对单体船非线性自由面边界条件的兴波阻力预报程序进行改进,成功开发了考虑升沉和纵倾影响的三体船非线性兴波阻力预报程序,对15种侧体布局方案的Wigley三体船兴波阻力进行计算,并将其与线性薄船理论计算结果、线性自由面条件的Dawson型方法计算结果、模型试验结果进行比较,表明非线性兴波阻力数值方法能够更好地反映三体船兴波阻力特性,用于三体船侧体布局优化设计时较其他2种数值方法更加可靠。

In order to enhance the reliability of trimaran side hull position optimization,the nonlinear wave making resistance prediction program with consideration of sinkage and trim was developed by extending the code for mono hull.The wave making resistance of the trimarans with 15 different side hull positions were calculated,and the numerical results were compared with the calculated results by the Michell method and the linear Dawson type method,and they were also compared with the experimental data.The compar-isons show that the nonlinear method can predict the trimaran wave making characteristics better,and is much more suitable for the optimization of the trimaran side hull position than the other two numerical methods.