| 水下爆炸压力时频分布的小波包分析 |
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| 引用本文： | 温华兵,尹群,张健.水下爆炸压力时频分布的小波包分析[J].江苏科技大学学报(社会科学版),2008,22(5). |
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| 作者姓名： | 温华兵 尹群 张健 |
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| 作者单位： | 江苏科技大学船舶与海洋工程学院,江苏镇江212003 |
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| 摘 要： | 为了对舰船结构和设备的冲击环境进行研究,提出了基于小波包分析的水下爆炸压力时频分析方法.研究了短时非平稳水下爆炸压力实验测试信号的时频分布和能量分布规律,从水下爆炸压力时域信号中提取出冲击波,首次和二次气泡脉动压力信号,分析了它们在不同频带的能量分布规律.结果表明,基于小波包的时频分析方法可以提取水下爆炸压力不同时段的信号进行能量和频率分析,水下爆炸压力中以低频成分为主的气泡脉动压力产生的能量接近总能量的一半,是使安装频率为数十赫兹的舰船设备产生冲击振动的主要能源.
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| 关 键 词： | 水下爆炸 时频分析 小波包分析 能量分布 冲击波 |
Analysis of time-frequency distribution of underwater explosion pressure through wavelet packet transform |
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| WEN Huabing,YIN Qun,ZHANG Jian.Analysis of time-frequency distribution of underwater explosion pressure through wavelet packet transform[J].Journal of Jiangsu University of Science and Technology:Natural Science Edition,2008,22(5). |
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| Authors: | WEN Huabing YIN Qun ZHANG Jian |
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| Institution: | WEN Huabing,YIN Qun,ZHANG Jian(School of Naval Architecture , Ocean Engineering,Jiangsu University of Science , Technology,Zhenjiang Jiangsu 212003,China) |
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| Abstract: | In order to study underwater shock environment of ship structure and equipment,a time-frequency distribution analysis method for underwater explosion pressure through wavelet packet transform is proposed.The experimental results of underwater explosion pressure signal are presented,and the time-frequency distributions and energy distributions are also calculated.The shock wave signal,the first air bubble pressure signal,and the second air bubble pressure signal are gotten from underwater explosion pressure ... |
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| Keywords: | underwater explosion time-frequency analysis wavelet packet analysis energy distribution shock wave |
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