为明确不同加筋金属板在爆炸载荷下抗爆性能的变化和响应特点,采用AUTODYN软件对不同爆炸载荷下的8种加筋模式金属板进行了模拟。结果表明:1)未出现破口之前,挠度与比例距离近似呈线性关系;2)相同载荷下随着加筋模式的改变,中心点残余挠度呈现“阶梯式”变化;3)加强筋未穿过金属板中心时,中心点残余挠度较大;4)随着加强筋数量的增加,塑性变形能在总能量中的占比逐渐降低,金属板整体抗爆性能增加。研究结果对金属板抗爆设计具有参考价值。

In order to define the different rib reinforcement plates under explosion load change and response characteristics of antiknock performance, the response of eight reinforced metal plates under different explosive loads is numerically simulated by using the nonlinear dynamic finite element software AUTODYN. The development law of the residual deflection at the center point of steel plates under the action of explosive loads and the relationship between the total energy and the plastic deformation energy are analyzed. The results show that:1) The deflection of the metal plate is approximately linear with the proportional distance before the obvious failure or break occurs.2) Under the same load, with the change of the stiffener mode, the residual deflection of the center point of the metal plate presents a "stepped" change.3) When the rib reinforcement do not pass through the projection point of the explosive center on the metal plate, the residual deflection of the center point of the metal plate is larger under the explosion load.4) With the increasing number of rib reinforcements, the proportion of plastic deformation energy in total energy decreases gradually, and the overall anti explosion performance of metal plate increases. The results of the study are of reference value to the explosion-resistant design of metal plates.