A fast numerical method for trimaran wave resistance prediction

A fast numerical method for trimaran wave resistance prediction
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三体波阻力快速数值预测方法

DOI:
10.1016/j.oceaneng.2015.07.008
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发表时间:
2015-10
期刊:
影响因子:
5
通讯作者:
Hearn Grant E.
Hearn Grant E.
中科院分区:
工程技术2区
文献类型:
--
作者:
Yu Wei;Chen Xu-jun;Wu Guang-huai;Liu Junyi;Hearn Grant E.

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由于船体之间的纵向和横向间隙的影响,三体船配置的优化是不平凡的。这种敏感性在所提出的预测中得到了说明。所提出的计算方法是基于Noblesse细长船理论的扩展。特别是相关的Kochin函数内的高振荡项被扩展为贝塞尔函数和勒让德多项式的一系列产品,以便于更快的计算和分离出特定的参数依赖关系。这些目标允许计算作为船体间隙参数的函数的Kochin函数的组成项,这些参数可以存储在阻力计算软件的外部。快速计算程序允许识别最佳三体船配置。基于作者早期的实验研究和其他研究人员的实验研究(Degiuli等人,2003)的结果显示了很好的一致性。本文给出并讨论了三种不同情况下对称和非对称外船体形式的波阻差异。
The optimisation of a trimaran configuration is not trivial due to the influence of longitudinal and transverse clearance between the hulls. This sensitivity is illustrated in the predictions presented.The proposed calculation procedure is based on an extension of the slender ship theory of Noblesse. In particular the highly oscillatory terms within the associated Kochin function are expanded as series of products of Bessel functions and Legendre polynomials to facilitate faster computation and to separate out specific parameter dependencies. These objectives allow calculation of constituent terms of the Kochin function as a function of hull clearance parameters, which may be stored externally to the resistance calculation software.The rapid calculation procedure allows identification of optimal trimaran configurations. Comparison between the numerical predictions and experimental measurement based on the authors’ earlier experimental investigations and those of other researchers (Degiuli et al., 2003) has shown good agreement.The wave resistance differences for symmetric and asymmetric outer hull forms for three distinct cases are presented and discussed.
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