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- 2018
爆炸荷载作用下复合材料加筋板的动力响应
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Abstract:
为了减轻抗爆结构质量，采用玻璃纤维增强聚合物基复合材料（SMC）与碳纤维增强聚合物基复合材料（CFRP）预浸料，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，纵筋和面板对加筋板的影响依次减小。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。 To get a lightweight anti-blast structure, short-cut glass fiber reinforced composite (SMC) and carbon fiber reinforced plastics (CFRP) were adopted to design and make stiffened plate. Finite element simulation based on LS-DYNA reveals that the composite stiffened panel has excellent anti-blast ability through large elastic deformation and the panel will rebound back completely with little residual deformation. Parametrized analyses reveal that transverse bars greatly influence the maximum flexure of the stiffened plates under blast. Their contribution to the rigidity of the panel is much greater than the longitudinal reinforcement and the skin. Applying equivalent volume conversion method, the stiffened panel is simplified as a uniform panel and the dynamic response of the composite stiffened panel is predicted theoretically. Precision and validity of the prediction in flexure are testified by the numerical simulation. 国家自然科学基金（11672130；51478465；51508567）；江苏省自然科学基金（BK20150713）
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