Development of Simulator for Plate Bending by Line-Heating

船舶工业中最具特色的工作就是对厚钢板进行弯曲。板料弯曲技术是板料弯曲加工中最难的技术之一，为了解决这些技术难题，在过去的30年里，日本进行了大量的研究。1）用于自动板弯曲的多活塞头万能压力机2）基于造船技能的人工智能和专家系统的开发本研究的目的是开发一个线弯曲模拟器暖气由于水火弯板的原理可以解释如下。当从板表面一侧加热时，在板厚方向上产生温度分布。这种温度分布导致两种类型的变形。一个是角变形，另一个是板内收缩。这些都是水火弯板在水火弯板成形过程中产生的热塑性变形的结果，为了对水火弯板成形过程进行数值模拟，水火弯板成形过程的建模是非常重要的。因此，我们决定进行弹性有限元计算。因此，模拟系统采用简化的非线性弹性板弯曲模型代替热弹塑性和大变形分析，有限元计算采用等效弯矩和等效载荷。该模拟器通过施加引起角变形的弯矩M和引起横向收缩的板内载荷F，使用户能够直观地理解板的弯曲，掌握板弯曲的基本知识，可作为技术人员的培训设备。

The most characteristic work in shipbuilding industry is to bend thick-steel plates. It is often said that plate bending technique is one of the most difficult ones.In order to solve those technological problem, a lot of investigations were conducted in the past 30 years in Japan.1) The universal press with multiple piston heads for automate plate bending2) Development of the artificial intelligence and expert system based on shipbuilding skillsOur aim of this research is developing a simulator for plate bending by Line-Heating. The principle of plate bending due to line heating can be explained as follows. When a plate is heated from one side of plate surface, temperature distribution is produced in the direction of plate thickness. This temperature distribution causes two types of deformation. One is angular distortion and the other is in-plate shrinkage. Those are the results from thermal plastic strains induced during line heating process.In order to carry a simulation of line heating process by numerical calculation, modeling of line heating process is very important. Therefore, we decide to carry elastic finite element calculation. So the simulator system was based on a simplified non-linear elastic plate bending model instead of thermal elasto-plastic and large deformation analysis.The finite element calculation subjected to equivalent moment and load. Bending moment M which induces angular distortion and in-plate load F which induces transverse shrinkage are applied.So user can understand plate bending intuitively and acquire know-how of it. The simulator is useful to a training facility for technicians.