Underwater radiated noise levels of a research icebreaker in the central Arctic Ocean.
Underwater radiated noise levels of a research icebreaker in the central Arctic Ocean.
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DOI：
10.1121/1.4790356
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发表时间：
2013-04
期刊：
影响因子：
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通讯作者：
Ethan H. Roth;V. Schmidt;J. Hildebrand;S. Wiggins
中科院分区：
文献类型：
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作者：
Ethan H. Roth;V. Schmidt;J. Hildebrand;S. Wiggins
美国海岸警卫队Cutter Healy的水下辐射噪声特征是在北冰洋中部不同类型的破冰行动中表现出来的。推进方式包括在可变冰盖中过境，用后退和撞击动作打破厚重的冰，以及在首推进器工作时进行动态定位。与开放水域运输相比，在破冰时，希利的噪声特征在20赫兹到2千赫之间增加了大约10分贝。由于螺旋桨向后或相反方向操作时出现空泡，在船舶进行后退和冲撞操作时，噪音水平最高。在以10、50和100赫兹为中心的频段，在破冰作业期间，声源水平在1米处达到190-200dBRe：1μpA(全倍频程)。
U.S. Coast Guard Cutter Healy's underwater radiated noise signature was characterized in the central Arctic Ocean during different types of ice-breaking operations. Propulsion modes included transit in variable ice cover, breaking heavy ice with backing-and-ramming maneuvers, and dynamic positioning with the bow thruster in operation. Compared to open-water transit, Healy's noise signature increased approximately 10 dB between 20 Hz and 2 kHz when breaking ice. The highest noise levels resulted while the ship was engaged in backing-and-ramming maneuvers, owing to cavitation when operating the propellers astern or in opposing directions. In frequency bands centered near 10, 50, and 100 Hz, source levels reached 190-200 dB re: 1 μPa at 1 m (full octave band) during ice-breaking operations.