基于SPH方法的M型快艇入水载荷仿真分析  

Simulation analysis on water entry loads of high-speed M-boat based on SPH method

作　　者：杨一凡 陈三桂[2] 周维星[2] 张涛[1] YANG Yifan;CHEN Sangui;ZHOU Weixing;ZHANG Tao(School of Naval Architecture and Ocean Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;China Ship Development and Design Center,Wuhan 430064,China)

机构地区：[1]华中科技大学船舶与海洋工程学院,湖北武汉430074 [2]中国舰船研究设计中心,湖北武汉430064

出　　处：《中国舰船研究》2022年第1期154-165,共12页Chinese Journal of Ship Research

摘　　要：[目的]为研究M型快艇典型截面结构入水过程中受到的水动力载荷,[方法]基于光滑粒子动力学(SPH)液-气两相流算法,模拟平板和弓形模型的入水过程,以验证所用算法的精确性。在此基础上,模拟M型快艇典型截面结构的入水过程,并与相关文献的试验结果进行比较。[结果]结果显示:两种结构入水过程的仿真结果与试验结果吻合较好。M型快艇入水过程中存在二次砰击现象,即在主船体斜升角较大时会导致第1次砰击载荷较小,若斜升角过大时第2次砰击过程中结构则受到的砰击载荷会显着增加。[结论]研究结果表明,SPH两相流算法可以很好地模拟M型快艇入水过程,斜升角的设计大小应适当。[Objectives]This study analyzes the hydrodynamic loads of a typical cross-section structure of a high-speed M-boat during water entry.[Methods]Based on the smooth particle dynamics(SPH)liquid-gas two-phase flow algorithm,simulations of both flat plate and arced structure water entry are carried out to verify the accuracy of the algorithm.On this basis,a typical cross-section structure water entry of the high-speed M-boat is simulated,and the results are compared with the experimental data available in literatures.[Results]The simulation results of both flat plate and arced structure water entry are in good agreement with the experimental data.A second slamming phenomenon occurs during water entry of the high-speed M-boat,that is,a larger dead-rise angle of main hull would make the first slamming load smaller,but if the dead-rise angle is too large,the load on the structure during the second slamming will increase significantly.[Conclusions]The SPH two-phase flow algorithm can accurately simulate the water entry of a high-speed M-boat.It is suggested that the dead-rise angle of a high-speed M-boat should be designed appropriately.

关 键 词：SPH两相流算法 M型快艇 二次砰击 斜升角 

分 类 号：U661.72[交通运输工程—船舶及航道工程]