Effect of high frequency induction technology-based model surface heat exchange coefficient on bending plate forming of ship hull

The bending and forming process of high-frequency induction line of the low carbon plate were studied using the thermal elastic-plastic finite element analysis. The influence of the heat exchange coefficient on the surface of plate model on the forming of ship plate was studied based on the analysis results. The results demonstrate that the heat exchange coefficient has significant influence on the temperature field of the ship plate, the time for cooing the plate to the room temperature decreases with the heat exchange coefficient on the surface of plate increases. The earlier staring of the cooling process will result in relative larger longitudinal displacement, more concentration of the horizontal shrinkage at the ending part of the heat and bigger influence of the heat exchange coefficient on the final formation of the plate under the same condition. Heating period is the most critical factor for the final forming of the plate. The bigger the heat exchange coefficient is during the heating process, the more concentrated the residual stress of the plate will be.