Abstract: Applying the hull box girder can improve the longitudinal strength of the structure. The box structure can protect important pipelines and cables in the girder and speed the construction. And it is also beneficial for quality control of construction and easy maintenance of the structure. However, currently the box beam structure is only used in local structures instead of the entire ship. In this article, taking a conventional hull as the base, the box girder was used for the whole ship design in order to improve the ship’s antiknock performance and meet the requirements of vitality. The hull structure was built by a steel box girder to bear the global loading. The hull shape lines and their necessary local stiffness were guaranteed by the light-weight and high-strength composite sheets. Thus, decoupling of local strength and global strength of the hull could be realized in this way. Based on the acoustic coupling method, the response of the hull to explosion was analyzed by means of ABAQUS software. And it as confirmed that the box beam structure has a better antiknock performance. Finally, the design of the hull box girder was optimized for further improvement of the antiknock capacity of the hull.

Key words: shock , hull box girder , composite materials , stability check , antiknock performance , optimal design

摘要： 在船体构件上应用箱形梁设计，能提高结构的纵向强度，具有利于保护重要管道和线缆、提高建造速度、利于质量控制和方便维修等优点。但是，国内外目前都是局部运用箱形梁结构，并未全船性设计使用，在此以某常规船体为基础，针对提高船舶抗爆性能和保持生命力的设计要求，全船性使用箱形梁。这种船体结构使钢制箱形梁承担全部的总强度，而船体型线和必要的使用刚度由轻质高强的复合材料板材来保证，实现局部强度与总体强度的解耦。在ABAQUS软件中基于声固耦合法，对船体水下爆炸响应进行分析，证实箱形梁结构具有较好的抗爆性能。最后对船体箱形梁进行优化设计，进一步提高抗爆能力。

关键词: 冲击, 船体箱形梁, 复合材料, 稳性校核, 抗爆性能, 优化设计