Abstract: Saddle plate is one of the typical double curved hull plates. The deformation prediction of the induction heating with multiple heating lines is the key technical problem in the steel plate induction heating technology regarding the study of saddle plate formed with multiple heating lines by high frequency induction heating. The correlation data between the procedure parameter and the inherent strain are established through multi-field coupling numerical calculation of a large number of steel plates based on the theory of inherent strain and the elastic finite element analysis method. The overall deformation of the saddle plate with multiple heating lines is then calculated by using the elastic finite element modeling with the input load of the actual inherent strain. The deflection obtained from the elastic element analysis of the saddle plate is consistent with the experimental value with short calculation time and satisfied accuracy. The results therefore show that the elastic element analysis modeling of the saddle plate with multiple heating lines can be applied to the deformation prediction of the saddle plate.

Key words: saddle plate, induction heating, multiple heating lines, inherent strain, elastic finite element analysis

摘要： 鞍形板是典型的船体双曲度板之一,在使用高频感应加热成形鞍形板的研究过程中,多加热线的感应加热变形预测是钢板感应加热工艺研究的关键技术问题。该文基于固有应变理论和弹性有限元分析方法,通过大量钢板多场耦合的数值计算建立了工艺参数和固有应变的关系数据,以实际的固有应变作为载荷输入参数,应用弹性有限元模型计算多加热线鞍形板的整体变形。鞍形板的弹性有限元分析结果得到的挠度值与实验值一致,计算时间短,计算误差符合工程精度要求。因此,分析结果表明鞍形板多加热线的弹性有限元分析模型可以应用于鞍形板的变形预测。

关键词: 鞍形板, 感应加热, 多加热线, 固有应变, 弹性有限元分析