论文部分内容阅读
为了减轻抗爆结构重量,采用玻璃纤维增强聚合物基复合材料(SMC)与碳纤维预浸料(CFRP),通过数值模拟和等效计算理论,对传统加筋抗爆板结构进行轻质高强设计。利用LS-DYNA有限元数值模拟软件进行分析,发现在爆炸荷载作用下加筋板的运动以弹性运动为主,该种复合材料具有较好的抗爆性能。对复合材料加筋板结构进行参数化分析,发现在爆炸荷载作用下横筋对加筋板结构最大位移值影响最大,纵筋、面板对加筋板的影响依次次之。结合刚度折算方法,建立了爆炸荷载作用下正交异性加筋板结构动力响应分析理论。利用该理论计算得到板结构在爆炸荷载作用下的最大位移,与数值模拟对比发现两者结果较为接近,为加筋抗爆板的设计提供了一种简化有效的计算方法。
In order to reduce the weight of antiknock structure, fiber reinforced polymer matrix composites (SMC) and carbon fiber prepreg (CFRP) were adopted to simulate the traditional reinforced antiknock structure with light weight and high strength . By using LS-DYNA numerical simulation software, it is found that the movement of stiffened plate is dominated by elastic movement under explosive load. The composite has better antiknock performance. The parametric analysis of the composite stiffened plate structure shows that the transverse stiffener has the greatest influence on the maximum displacement of the stiffened plate under the action of blast load. The influence of the longitudinal stiffener and the stiffened panel on the stiffened plate is followed. Combined with the stiffness reduction method, the dynamic response analysis theory of orthotropic stiffened plate under explosive load is established. The maximum displacement of the slab structure under blast load was calculated by using this theory. Comparing with the numerical simulation, the results show that the two structures are close to each other, which provides a simplified and effective calculation method for the design of stiffened plate.