| 涡激振动对船舷安装的相干声纳条带测深系统测量精度影响分析 |
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| 引用本文： | 蒲进菁,曹立华,杨荣民,徐继尚.涡激振动对船舷安装的相干声纳条带测深系统测量精度影响分析[J].中国海洋大学学报(自然科学版),2011,41(12):86-90. |
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| 作者姓名： | 蒲进菁 曹立华 杨荣民 徐继尚 |
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| 作者单位： | 1. 中国海洋大学海洋地球科学学院,山东青岛,266100
2. 中国海洋大学海洋地球科学学院,山东青岛266100;中国海洋大学海底科学与探测技术教育部重点实验室,山东青岛266100 |
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| 基金项目： | 国家自然科学基金项目(41006024)资助 |
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| 摘 要： | 相干声纳条带测深系统采用船舷安装时,连接系统水下单元的钢管在水流作用下可能发生共振和频率锁定而剧烈振动,其下端的以换能器为主的系统水下单元也会随之摆动,使数据质量和测量精度受到影响。笔者通过分析在实际工作中遇到的问题发现:连接系统水下单元的钢管越长,钢管越容易在低流速条件下发生共振现象;换能器剧烈摆动会造成大量噪音信号;换能器摆动幅度较大时系统的安装校准会失效。本文通过解析计算得出了在现场操作中不同悬挂长度的钢管发生频率锁定时的控制流速以及换能器最大摆动幅度,认为实际工作中换能器距固定点在1.0m以内是可靠的,并对现场操作中如何减弱和避免涡激振动对系统精度的影响提出建议。
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| 关 键 词： | 相干声纳条带测深系统 涡激振动 固有频率 频率锁定 避振 |
The Effect of Vortex Induced Vibration(VIV) on the Measure Accuracy of Overside Mounted Interferometric Seabed Inspection Sonar(ISIS) Sounding System |
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| PU Jin-Jing,CAO Li-Hua,YANG Rong-Min,XU Ji-Shang.The Effect of Vortex Induced Vibration(VIV) on the Measure Accuracy of Overside Mounted Interferometric Seabed Inspection Sonar(ISIS) Sounding System[J].Periodical of Ocean University of China,2011,41(12):86-90. |
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| Authors: | PU Jin-Jing CAO Li-Hua YANG Rong-Min XU Ji-Shang |
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| Institution: | PU Jin-Jing1,CAO Li-Hua1,2,YANG Rong-Min1,XU Ji-Shang1,2 (1.College of Marine Geo-Sciences,2.The Key Lab of Submarine Sciences and Exploration Technology,Ministry of Education,Ocean University of China,Qingdao 266100,China) |
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| Abstract: | Using the Interferometric Seabed Inspection Sonar(ISIS) sounding system,the underwater transducer of the system is usually installed on shipboard tixed by a steel tube.However,the steel tube will possibly vibrate under current action.The phenomenon is called vortex induced vibration(VIV).If the frequency of VIV is close to the natural frequency of the steel tube,frequency lock-in and tube resonance phenomenon will happen,whice will make the transducer sway and consequently reduce data accuracy.Based on abun... |
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| Keywords: | ISIS sounding system Vortex induced vibration(VIV) natural frequency lock-in avoid vibration |
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