波浪载荷与砰击载荷联合作用下SWATH船结构动态响应

针对SWATH船特点，基于平板砰击理论，考虑砰击载荷的时变特性和空间分布不均匀性，提出了随时间和空间变化的砰击载荷公式；采用实时直接加载技术模拟波浪载荷与砰击载荷的联合作用，对某SWATH船在波浪载荷与砰击载荷联合作用下振动响应特性进行了整船数值仿真研究，讨论了砰击对结构总强度的影响. 研究发现：对于SWATH船，波浪载荷与砰击载荷联合作用有其特殊的结构响应模式. 联合作用的整体效应并不是单体船那种沿纵向的两节点弯曲振动，而是连接桥结构的横向弯曲振动；联合载荷作用对湿甲板边缘和支柱外板与横框架连接处的强度威胁较大；砰击对船体振动响应影响重大，从而影响结构总强度和总变形.

Study on Dynamic Response of SWATH Structure Subjected to Wave Loads and Slamming Loads

As the particular structure for small water-plane area twin hull(SWATH),considering the time-varying characteristics and non-uniformity distribution of slamming load,formula of slamming load varied with space and time was deduced based on the theory of plat slamming.The directly loading technology that can real-time simulate waves was applied.Then an analysis of structure vibration response characteristics of SWATH subjected to wave loads and slamming loads was conducted,and the discussion of the slamming effect on hull strength was performed.The results show that there are some particular response models under combined loads.The effect induced by combined loads actions is not two-nodal vibration like mono-hull,but transverse bending vibration of cross structure.Combined loads actions threaten the strength of wet-deck and stanchion severely.Slamming contributes to the structure vibration response significantly and influences the overall strength and deformation.