| 王志超,梁民帅,李东林,郁高坤,彭临慧.沉积层海底界面Scholte波水池实验[J].,2024,43(5):1113-1121 |
| 沉积层海底界面Scholte波水池实验 |
| Study of sediment’s influence on Scholte wave by tank experiment |
| 投稿时间：2023-04-25 修订日期：2024-09-10 |
| 中文摘要: |
| 海底界面Scholte波具有衰减小、传播距离远等特点，可应用于水下目标探测与海底参数反演。在实际海洋环境中，海水与弹性海底之间的沉积层会对Scholte波的激发和传播产生显著影响。本文利用缩比原理设计并开展水池实验研究，将实际海洋环境缩比至实验室水池尺度，利用声压场Scholte波识别方法在包含沉积层的实验环境下对Scholte波的激发与传播规律进行探究。实验结果表明，本实验条件下，1mm厚度的沉积层时海底界面依然有Scholte波激发，但沉积层的存在会增大其衰减；而厚度超过1mm的沉积层会导致Scholte波无法激发。根据缩比原理，实验环境对应为声源频率10Hz，水深3000m，沉积层厚度5m的实际海洋环境，即在上述实际海洋环境中，海底界面Scholte波仍可以正常激发，而厚度大于5m的粉沙质沉积层会导致Scholte波无法激发。 |
| 英文摘要: |
| With less attenuation and longer transmission distance, Scholte waves at the seafloor interface can be applied in underwater target detection and seafloor parameter inversion. In the real ocean, the sediment between the seawater and the elastic seafloor could significantly affect the excitation and propagation of Scholte waves. In this paper, by scaling down the real ocean environment to laboratory scale according to the scale principle, a tank experiment is designed and carried out to investigate the excitation and propagation of Scholte waves in an experimental environment containing sediment using Scholte wave identification method based on acoustic pressure field measurement. It is shown in results that under the experimental conditions, Scholte waves could still be excited at the seafloor interface with the sediment of 1mm thickness, but the sediment increases its attenuation; and the thicker sediment would prevent Scholte waves’ excitation. According to the scaling principle, the experimental environment can be converted to the real ocean environment with a source frequency of 10Hz, a water depth of 3000m and a sediment thickness of 5m, i.e., in the above-mentioned real ocean environment, Scholte waves at the seafloor could be excited normally, and slit sediment thicker than 5m would cause the failure of Scholte waves’ excitation. |
| DOI：10.11684/j.issn.1000-310X.2024.05.022 |
| 中文关键词: Scholte波 水池实验 模态分离 沉积层 |
| 英文关键词: Scholte wave tank experiment modal decomposition sediment |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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