阶梯盘超声辐射声场指向性研究

发布时间：2018-02-12 16:30

  本文关键词： 指向性 阶梯盘 阶梯数目　出处：《机械科学与技术》2017年10期 　论文类型：期刊论文

【摘要】：指向性是衡量声源性能的重要参数。本文中研究了阶梯盘指向性与阶梯数目之间的关系。设计了频率和基底厚度一定的1~4阶阶梯盘。计算了4个阶梯盘以及与阶梯盘对应的同频率、同半径的活塞盘的指向性。结果表明,阶梯盘与和它同频率同半径的活塞盘的指向性主瓣同,但前者的旁瓣比后者多。频率、基底厚度一定时,阶梯数目越多(对应的半径也越大),指向性也越尖锐。实验测试与理论计算结果相符。
[Abstract]:Directivity is an important parameter to measure the performance of sound source. In this paper, the relationship between the directivity of step disk and the number of steps is studied. A 1 / 4 step disk with constant frequency and substrate thickness is designed. Four step disks and four steps are calculated. The same frequency corresponding to the ladder plate, The directivity of the piston disc with the same radius. The results show that the directional main lobe of the step disc is the same as that of the piston disc of the same frequency and radius, but the side lobe of the former is more than that of the latter. The more the number of steps is (the larger the corresponding radius is, the more sharp the directivity is.) the experimental results agree with the theoretical results.
【作者单位】： 陕西师范大学物理学与信息技术学院陕西省超声重点实验室;
【基金】：国家自然科学基金项目(11374201)资助
【分类号】：O426.2
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本文编号：1506065