基于高频感应加热的船用钢板材弯曲成形

在船舶建造过程中，高频感应加热是实现船体板材高效高精度弯曲成形的重要方法。本文首先采用25KW新型高频感应加热设备，进行不同感应加热过程及工艺的实验，得到典型弯曲形式的船体外板（马鞍型和帆型）。同时，采用三坐标定位仪进行面外弯曲变形的测量和曲面重构，得到实验板材面外弯曲变形的分布和数值。通过热-弹-塑性有限元分析与弹性有限元分析两种方法，计算预测板材在高频感应加热作用下的面外弯曲变形；两种数值方法预测的板材面外弯曲变形趋势和数值与测量结果比较吻合，且在弹性有限元分析中，计算机资源消耗少，计算结果精度高。

Research on Bending Forming of Marine Steel Plates with High Frequency Induction Heating

In the ship construction process, high frequency induction heating is an important method to achieve high-efficiency and high-precision bending of hull plates. In this paper, a new type of 25KW high frequency induction heating equipment was first used to carry out experiments on different heating procedures and processes, and typical bending forms (saddle and sail shapes) of hull plates was obtained. At the same time, three-coordinate locator was applied to measure the distribution and value of the out-of-plane bending deformation of the experimental plates. Through the thermo-elastic-plastic and elastic finite element methods, the out-of-plane bending deformation of the plate under high frequency induction heating was calculated. The out-of-plane bending deformation trend and value predicted by two numerical methods was quite consistent with the measured results. Moreover, in the elastic finite element analysis, the computer resource consumption was small, and the results had high-precision.