单曲率船体外板感应加热弯曲成形工艺规划
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作者:
作者单位:

1.华中科技大学 船舶与海洋工程学院;2.江苏科技大学 船舶与海洋工程学院

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中图分类号:

U671.3

基金项目:

感应加热下船体外板成形工艺的智能系统开发(HZ2018008)


Processing Plan of Induction Heating Bending for Ship Hull Plate with Single Curvature
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Affiliation:

1.School of Naval Architecture and Ocean Engineering,Huazhong University of Science and Technology;2.School of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology

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    摘要:

    船舶建造过程中,板材曲面成形工艺显著影响船舶的建造精度与生产效率。本文以18mm厚的船用AH36钢板为研究对象,开展感应加热弯曲成形试验并测量板材的瞬态温度,之后采用手持式三维扫描仪获取板材点云数据,通过后处理软件得到板材面外弯曲变形云图。随后,通过热-弹-塑性有限元分析模拟板材感应加热弯曲成形过程,温度和面外弯曲变形计算结果与测量数据较吻合,验证了建立的数值模型的准确性。基于高通量的有限元分析,建立了热源移动速度与横向弯曲角度的数学关系。同时,针对单曲率板材,提出内接折线法和外切折线法来拟合板材弯曲成形形状,进而给出相应的板材加热线位置和热源移动速度等工艺参数,进行热-弹-塑性有限元分析。计算结果表明提出的两种方法得到的面外弯曲变形均与目标曲率板的弯曲形状相吻合,证明了内接折线法和外切折线法应用到实际工程的可行性,为船厂弯板成形提供理论依据。

    Abstract:

    During ship construction, plate forming technology significantly affects construction accuracy and production efficiency. In this paper, AH36 steel plate with 18mm thickness was examined and induction heating bending experiment was carried out while transient temperature was measured. 3D scanner was used to obtain the point cloud data of examined plate, and the out-of-plane bending deformation of examined plate was observed. Then, induction heating bending was computed by thermal-elastic-plastic finite element analysis. The computed results of temperature and out-of-plane bending deformation were in good agreement with the measured data, which the accuracy of computational analysis was confirmed. With lots of FE analysis, the mathematical relationship between the moving velocity of heat source and the transverse bending angle was established. For the single curvature plate, the inner polyline method and the outer polyline method were both proposed to fit the bending shape of objective plate, and the corresponding process parameters such as the position of heating line and the moving speed of heat source were proposed for the thermal-elastic-plastic FE analysis. The calculation results show that the out-of-plane bending deformation obtained by the two methods are consistent with the bending shape of objective curvature plate, which demonstrates the feasibility of applying proposed methods for practical engineering, and provides a theoretical basis for plate bending in shipyard.

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历史
  • 收稿日期:2022-10-28
  • 最后修改日期:2022-11-21
  • 录用日期:2022-11-23
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