Study of Temperature Field and Inherent Strain Produced by High Frequency Induction Heating on Flat Plate

摘要

In the heating and bending process for ship hull plates, high frequency induction heating is replacing traditional torch flame heating. In this paper, the finite element model of high frequency induction heating source is developed based on the feature of high frequency induction heating. In this model, the temperature field of high frequency induction heating is analyzed, and the validity of this model is confirmed by experimental results. Using the developed heat source model, the deformations have been calculated. Further, based on the knowledge obtained through the study, simple formulae to calculate the inherent strain of high frequency induction heating are proposed. Using the inherent strain given by the formulae, an elastic finite element method is developed to predict the deformation produced by heating and bending.