Establishment of metamodels for ship seakeeping performance using an effective approximation modeling method

被引：0
作者：
Li D.-Q. [1 ]
Wilson P.A. [2 ]
Jiang Z.-Y. [1 ]
Zhao X. [1 ]
机构：
[1] School of Naval Architecture & Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang
[2] Fluid Structure Interactions Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton
来源：
Chuan Bo Li Xue/Journal of Ship Mechanics | 2016年 / 20卷 / 03期
关键词：
Design of experiment; Metamodel; Seakeeping; Support Vector Machine;
D O I：
10.3969/j.issn.1007-7294.2016.03.002
中图分类号：
学科分类号：
摘要：
The prediction of seakeeping performance for ships is a complex calculation process because of the large number of possible ship configuration variables that will affect the seakeeping motion; high fidelity commercial software is used to forecast the ship performance such as Computational Fluid Dynamics (CFD) then there is a large overhead in both time and money to use such software. In this paper, the Latin Hypercube Design methodology is employed to explore the design space and to sample data to cover the design space. An index is introduced, namely the percentage of downtime which illustrates the short-term and long-term ship seakeeping motion, defined as the comprehensive evaluation index for ship seakeeping performance, which is to be used in the comparison process of ship design. The five motions of ship seakeeping performance were considered as roll, pitch, yaw, sway and heave. To improve the efficiency of seakeeping calculation, an effective approximation modeling method - the Single-parameter Lagrangian Support Vector Regression (SPL-SVR) was adopted and trained to establish the metamodels and predict the seakeeping performance and this algorithm was first proposed by authors in their past studies. For the Offshore Supply Vessel (OSV), the seakeeping criteria were predicted with the SPL-SVR and compared with the NAPA-based calculation results with the seakeeping manager, the Artificial Neural Network results and classical SVR results. Using two ship speeds for an Offshore Supply Vessel, the metamodels of ship seakeeping performance of short-term percentage of downtime were established; these metamodels were suitable for the practical application in ship preliminary design stage and all the numerical results show the effectiveness of the new approximation algorithms. © 2016, Editorial Board of Journal of Ship Mechanics. All right reserved.
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页码：243 / 257
页数：14
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