复杂曲度船体外板展开算法研究

摘要/Abstract

摘要： 针对复杂曲度船体外板的展开问题，考虑到水火弯板加工工艺特点和船体外板厚度普遍较大，对几何展开算法进行了改进。采用有限单元化的思想，先将曲面离散成板条，再将板条离散成三角形平面进行展开和拼接。针对船体外板厚度大的特点，在展开之前将展开面从型表面偏移到中性层；针对水火弯板加工工艺特点，在板条拼接时消除板条间的重叠部分，保留间隙部分，从而增大展开面积，作为水火弯板加工时收缩的补偿量。为了实现展开的自动化，采用提出的算法开发了船体外板展开软件。采用实船分段对软件进行测试，并与TRIBON软件展开结果进行对比，结果表明，所有测试板的误差在1.0~1.8 mm之间，最大误差不超过2 mm，满足实际生产的需求。

关键词: 船体外板, 展开, 水火弯板, 中性层, 造船

Abstract: In order to develop hull plates with doubly curvature, a geometric development algorithm was improved considering the characteristics of line-heating processes and large thickness of ship hull plates. Using the idea of finite element, the surfaces were segmented into strips firstly, and then the strips were separated into triangle planes for devolopment and splicing. In view of the characteristics of large thickness of ship hull plates, the developing surfaces were shifted from the profile surfaces to the neutral layers before development; in view of the characteristics of line-heating processes, the overlapping parts between the strips were eliminated and the gap parts were reserved during the splicing of the strips, so that the expansion areas were increased to compensate for the shrinkage of line-heating processes. In order to realize the automatic development of ship hull plates, the software was developed. And the development accuracy of the software was tested and verified by comparion with the results of TRIBON software. The results show that the errors of all test boards are between 1.0 mm and 1.8 mm, and the maximum error is not more than 2 mm, which may meet the actual production requirements.

Key words: hull plate, development, line-heating, neutral layer, shipbuilding

中图分类号:

U671

陈兴怖1，2;胡勇1，2;黄朝炎1，2;王尧3;王健3. 复杂曲度船体外板展开算法研究[J]. 中国机械工程.

CHEN Xingbu1,2;HU Yong1,2;HUANG Chaoyan1,2;WANG Yao3;WANG Jian3. Research on Development Algorithm for Doubly Curvature Hull Plates[J]. China Mechanical Engineering.

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