船舶浮态计算的一种修正方法  

A modified method to ship floating calculation

作　　者：刘春雷[1] 尹勇[1] 孙霄峰[1] 张秀凤[1] 

机构地区：[1]大连海事大学航海学院,辽宁大连116026

出　　处：《大连海事大学学报》2014年第4期1-6,共6页Journal of Dalian Maritime University

基　　金：国家高技术研究发展计划(863)资助项目(2011AA110201);大连市科技计划项目(2013A16GX118);中央高校基本科研业务经费专项基金资助项目(3032013007)

摘　　要：为提高船舶浮态计算的精度,提出一种基于加密数字型值表的船舶浮态计算修正方法.在常规浮态计算方法的基础上采用Nowton迭代法进行修正.将计算机图形学的SH多边形剪裁算法用于横剖面与水线面的求交.基于坐标系仿射变换将空间倾斜水线面降到二维,将倾斜水线面轮廓提取问题转换成二维多边形凸包求解问题.在此基础上详细给出了雅克比矩阵系数的求解方法.以散货船"太行128"为例,对五种典型载况进行了计算,结果表明该修正方法适用于船舶小纵倾和大纵倾的情况,提高了计算精度,具有一定的工程应用价值.In order to improve the calculation accuracy,a modified method based on Densified Table of Offsets was proposed. On the basis of the conventional calculation method,Newton iterative method was used to correct the result. SH clipping algorithm was used to calculate the intersection of the transverse sections and water plane. Affine transformation was used to change inclining water plane to 2D polygon,changing the contour extraction problem into the problem of how to find the convex hull. An accurate method was presented to calculate the coefficient of Jacobi matrix. Bulk carrier ＂Taihang128＂was taken as an example,five kinds of typical load conditions were calculated. Results indicate that this modified method,which has high accuracy,can be applied to ship in little and large trim condition,and has a certain practical application value.

关 键 词：船舶工程 船舶浮态 牛顿迭代 仿射变换 SH剪裁 

分 类 号：U661.21[交通运输工程—船舶及航道工程]