Abstract: The loading characteristics of ship’s double bottom tanks subjected to underwater non-contact and contact explosions were researched respectively using AUTODYN finite element software. The loading type of the double bottom tanks during semi-load and full load conditions was analyzed, and the influence of explosive distance and loading condition on the loading characteristics of internal plate was discussed. The result showed that the transmitted shock wave is the major threat of the inner plate in full-load condition; the splashing loading is the major threat of the inner plate in semi-load and non-contact situation; and high-velocity water-jet is the major threat of the inner plate in semi-load and contact situation. Therefore, the semi-load condition of double bottom tanks is strongly recommended to warship in active time.

Key words: shock , underwater non-contact and contact explosion , double bottom tanks , inner plate loading , dynamic response

摘要： 用AUTODYN有限元程序研究水下非接触及接触爆炸作用下舰船双层底液舱内底的载荷特性。分别分析非接触及接触爆炸作用下，舰船双层底液舱半载与满载时内底的冲击载荷种类，探讨爆距及装载状态的不同对内底爆炸载荷特性的影响。研究表明，液舱满载时，透射冲击波是威胁内板的主要载荷形式；药包非接触、液舱半载时，液舱内部飞溅载荷是威胁内板的主要载荷形式；药包接触、液舱半载时，高速水层抨击是威胁内板的主要载荷形式，据此，总结得出舰船在服役过程中双层底液舱应采取的装载状态。

关键词: 冲击, 水下非接触及接触爆炸, 双层底液舱, 内底载荷, 动态响应