文章摘要
彭茜蕤,周彦玲,范军.水中规则波纹表面球回声特性研究[J].声学技术,2018,37(6):528~534
水中规则波纹表面球回声特性研究
Echo characteristics of a regular corrugated surface ball in water
投稿时间:2017-12-13  修订日期:2018-03-15
DOI:10.16300/j.cnki.1000-3630.2018.06.003
中文关键词: 波纹表面|回声特性|目标强度
英文关键词: corrugated surface|echo characteristics|target strength
基金项目:国家自然科学基金(11774229)资助项目。
作者单位E-mail
彭茜蕤 上海交通大学海洋工程国家重点实验室, 上海 200240  
周彦玲 上海交通大学海洋工程国家重点实验室, 上海 200240  
范军 上海交通大学海洋工程国家重点实验室, 上海 200240 fanjun@sjtu.edu.cn 
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中文摘要:
      运用声呐目标回声特性预报的板块元方法,研究了平面波入射水中规则波纹(正弦平方曲线波纹)表面球体的目标回声特性。分析了表面波纹高度、周期、入射平面波频率和入射方位角对声目标强度空间分布和频率响应特性的影响规律。讨论了不同频段目标强度空间分布特性的形成机理,得到了表面波纹参数与目标强度频率响应和空间分布特性的近似定量关系。通过水槽实验测量得到了3D打印的规则波纹表面尼龙球目标强度的频率响应和空间分布特性,测量结果与理论计算结果吻合较好。掌握规则波纹表面球体回声特性,有助于开展利用声学超构材料对散射声场调控的研究。
英文摘要:
      Echo characteristics of a regular corrugated (sine squared curve) surface sphere in water with an incident plane wave are investigated by using the planar elements method which is used for forecasting echo characteristics of sonar targets. The effects of surface corrugation's height, period, incident plane wave frequency and incident azimuth angle on the spatial distribution and frequency response characteristics of acoustic target strength are analyzed. The formation mechanism of the spatial distribution characteristics of target strength in different frequency bands is discussed. The approximate quantitative relationship between the parameters of corrugated surface and the spatial distribution as well as the frequency response characteristics of target strength is obtained. The target strength of the 3D printed regular corrugated surface nylon sphere is measured in acoustic tank. The measured spatial distribution and frequency response characteristics of target strength are in good agreement with the theoretical results. A thorough understanding of the echo characteristics of regular corrugated surface sphere is helpful for conducting research on controlling the scattering sound field by using the acoustic metamaterials.
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