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Research of Multi-Hull Vessels’ Longitudinal Motion Prediction

Author: WeiYueFeng
Tutor: DuanWenYang
School: Harbin Engineering University
Course: Fluid Mechanics
Keywords: Two-and-one-half-dimensional theory Lateral flow methods Trimaran Five trimaran Seakeeping
CLC: U661.1
Type: Master's thesis
Year: 2007
Downloads: 210
Quote: 2
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Abstract


This paper is based on the hydrodynamic characteristics of the two-dimensional semi- the theoretical prediction ship in waves and sports performance . The theory of two-dimensional semi- definite solution of the problem retains three-dimensional Speed ??free surface conditions , and to some extent reflects the propagation of water waves in the direction of captain , while the control equation and conditions of the object surface is two-dimensional , the calculation accuracy was significantly better than sliced method , computational efficiency is higher than the 3 - D have Speed ??. The two-and-one-half-dimensional theory is developed on the basis of the potential flow theory , the lateral flow method results viscous correction of the two-dimensional semi- theoretical prediction of conventional single ship movement response . Taking into account the ship sailed high speed sailing posture than static float , causing the average wet surface , this article examines the attitude of sailing ship motion prediction . Unique trimaran and five trimaran ship , excellent performance, and have broad application prospects in the military and civilian aspects . Compared with the conventional ship , the introduction of both sides of the sheet body makes the flow field around the multi-hull boats become very complex . In this paper, the theory of the two-and-one-half-dimensional response to forecast the movement of multi -hull boats , and the results of model tests were compared , the results show that this method can effectively forecast multi- hull ship motion response , improve the calculation accuracy . The multi - hull layout by changing the effects of the coefficient of hydrodynamic characteristics of multi-hull boats , the layout of the sheet body affect its seakeeping .

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CLC: > Transportation > Waterway transport > Marine Engineering > Ship Principle > Ship hydrodynamics
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