摘要
为了更准确地预报方尾船阻力并提高船型优化设计的效率,开发了考虑升沉和纵倾影响的方尾船型非线性兴波阻力计算程序。采用Wyatt公式进行非线性迭代,选用Raven优化得到的四点迎风差分格式及配置点前移方法来满足辐射条件。采用面元上置的方法来消除奇异性,同时提高数值稳定性。以DTMB5415方尾船为数值模型,采用本文方法对考虑升沉和纵倾、不考虑升沉和纵倾两种状态的非线性兴波问题进行求解,与试验结果对比表明,本文方法计算得到的阻力、升沉和纵倾与试验结果吻合较好,同时,当傅汝德数大于0.3时,升沉及纵倾对阻力计算结果影响明显,数值计算时应予以考虑。
In order to calculate the wave making resistance more accurately and to develop more efficient ship hull optimization program for the transom-stern ships,a nonlinear wave resistance solver with consideration of sinkage and trim has been developed,incorporating with the special handling of the flow behind the transom-stern.Wyatt＇s formulas were used for nonlinear iterative process and both Raven＇s optimized four-point upwind difference scheme and collocation-point shift method were used to satisfy the radiation condition.Desingularization was achieved by raising the panel a distance above the collocation-point,and the stabilization of the iteration could be enhanced.The DTMB 5415 transom-stern ship model were taken as a numerical calculation example,and the wave making problem of the model were solved with present method,both with and without consideration of the sinkage and trim.The calculated results were compared with the experimental data which indicated that with present method the resistance,sinkage and trim could be predicated very well,and that taking the sinkage and trim into account during the calculation is important in case Froude number larger than 0.3.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
2010年第3期422-428,共7页
Chinese Journal of Hydrodynamics
