【摘要】 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。首先采用25 kW新型高频感应加热设备,进行不同感应加热过程及工艺的试验,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,得到试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。更多还原

【Abstract】 In the ship construction process, high frequency induction heating is an important method to achieve high-efficiency and high-precision bending of hull plates. A new type of 25 kW high frequency induction heating equipment is first used to carry out experiments on different heating procedures and processes, and typical bending forms(saddle and sail shapes) of hull plates is obtained. At the same time, three-coordinate locator is 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 is calculated. The out-of-plane bending deformation trend and value predicted by two numerical methods is quite consistent with the measured results. Moreover, in the elastic finite element analysis, the computer resource consumption is small, and the results have high-precision.更多还原