张浩楠, 张春辉, 张磊, 等. 大型浮动冲击平台冲击环境特性研究[J]. 中国舰船研究, 2024, 19(3): 1–8. doi: 10.19693/j.issn.1673-3185.03449
引用本文: 张浩楠, 张春辉, 张磊, 等. 大型浮动冲击平台冲击环境特性研究[J]. 中国舰船研究, 2024, 19(3): 1–8. doi: 10.19693/j.issn.1673-3185.03449
ZHANG H N, ZHANG C H, ZHANG L, et al. Research on shock environment characteristics of large-scale floating shock platform[J]. Chinese Journal of Ship Research, 2024, 19(3): 1–8 (in Chinese). doi: 10.19693/j.issn.1673-3185.03449
Citation: ZHANG H N, ZHANG C H, ZHANG L, et al. Research on shock environment characteristics of large-scale floating shock platform[J]. Chinese Journal of Ship Research, 2024, 19(3): 1–8 (in Chinese). doi: 10.19693/j.issn.1673-3185.03449

大型浮动冲击平台冲击环境特性研究

Research on shock environment characteristics of large-scale floating shock platform

  • 摘要:
    目的 旨在分析水下爆炸载荷作用下大型浮动冲击平台(LFSP)的冲击环境特性。
    方法 基于声固耦合方法对LFSP进行水下爆炸数值模拟,通过试验与仿真数据对比,验证计算方法的有效性;研究LFSP内底冲击环境沿纵剖面分布特性以及药包横向距离对LFSP内底整体冲击环境的影响规律,并拟合出LFSP冲击环境预报公式。
    结果 结果表明:LFSP内底的迎/背爆面、中纵剖面冲击环境沿纵剖面分布变化规律基本一致,其首尾两侧冲击环境偏小,中部偏大;迎/背爆面冲击环境存在差异,背爆面谱速度大于迎爆面,迎爆面谱位移大于背爆面。
    结论 背爆面测点在内底板局部模态被激起及冲击谱出现局部峰值导致背爆面谱速度大于迎爆面,迎爆面测点爆距较小及冲击响应强烈导致迎爆面谱位移大于背爆面。

     

    Abstract:
    Objective This paper aims to analyzes the shock environment characteristics of a large-scale floating shock platform (LFSP) subjected to underwater explosion.
    Methods The acoustic-solid coupling approach is used as the basis for the numerical simulation. The validity of the calculation method used in this paper is verified by comparing the experimental data with simulation, and the shock environment characteristics of LFSP's inner bottm is investigated in terms of its longitudinal section distribution as well as the effects of changes in the horizontal distance from the blast source on the whole shock environment of LFSP' s inner bottom, thereby the LFSP's shock environment prediction formula is obtained by fitting approach.
    Results  The shock environment distribution patterns along the longitudinal section in the inner bottom structure, i.e. the front blast surface, back blast surface and the longitudinal section in centre plane are basically the same. The shock environments on the front and back sides are small, while that of the middle is large. The shock environments of the front and back sides of the floating platform differ, and the spectral velocity of the back side is greater than that of the front side, while the spectral displacement of the front side is greater than that of the back side.
    Conclusions  The back blast surface measurement points within the bottom of the local mode are excited so spikes appear in the shock spectral lines, resulting in the spectral velocity of the back blast surface is greater than that of the front blast surface. The burst distance is smaller so the shock response is stronger, leading to the spectral displacement of the front blast surface is greater than that of the back blast surface.

     

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