加勁平板承受水下爆炸之動態反應分析

The Dynamic Response Analysis of Stiffened Plates to Underwater Explosion

加勁平板結構由於具有較大的勁度／重量比，因此廣泛的應用於海事結構及水下載具的主結構，用以承受側向負荷，如爆炸所生之爆震波作用即屬之。本研究主要在利用非線性有限元素分析軟體ABAQUS針對加勁平板結構承受水下爆炸震波作用之動態反應進行研究，並先與文獻中實驗量測之結果進行比較，驗證了程式在分析此類問題上之可靠性。據此，針對具不同加強肋之加勁板在不同爆震負荷下之動態反應進行了探討。此外，亦利用能量原理推導出加勁平板承受水下爆震負荷的近似算法，經驗證可用於評估結構的抗爆震能力。 Owing to the plates are commonly used in marine structures which are subjected to static, periodic or random loads. This investigation addresses the problem of transient responses of a stiffened plates subjected to an underwater explosion with the nonlinear finite element code ABAQUS was carried out. The reliability of the results was verified via the Ramajeyathilagam's experiments. In view of the above, this study elucidates the dynamic responses of stiffened plates in accordance with different ribs and shock loading. In addition, This investigation proppsed a approximate estimation method which used the principle of energy conservation could rapidly predicted the shock resistance of stiffened plates. The studies presented in this paper attempt to supply a reasonable comprehensive account, which will be used in designing ship hulls so as to enhance resistance to underwater shock damage.