Practical studies on the plate bending work using Multiple-Piston-Pressing method

本研究旨在为船体外板的塑性弯曲提供一种实用的方法，而获得圆柱形、反破碎型和同向碎裂型的基本曲面是一件重要的事情。因此，在船体外板的弯曲工作中采用了多活塞加压的方法。研究结果表明：(1)测量了每个多活塞压头上的外力，并求出了板材弯曲时的压力分布。(2)进行了矩形和方板的弯曲试验。这在一定程度上成功地实现了船体外板弯曲的可能性。(3)由于板材弯曲功的重复，在矩形板材上，板材的横向挠度对板材的滚动方向没有太大的影响。

This research is to contributete to a practical method which can be bend of the outside plate of ship plastically and it is an important thing to get such a basic curved surface as cylindrical, anticlastic and synclastic type.So Multiple-Piston-Pressing metod adopted at the bending work of plateThe results of this investigation are obtained the decisions as follows :(1) The external force which act upon each Multiple-Piston-Pressing head are measured, and then solved a distributions of pressing load when the plate are bended.(2) Rectangular plate as well as square plate are experimented for bending work, which succeeded in some possibility of bending of the outside plate of ship.(3) As results of repeating of plate bending work, At rectangular plate a roll direction of the plate is not so affected for the lateral deflection of plate.