安装在有限的外中的喇的定向性:一种多模式的配方
Hao Dong1, Jean-Baptiste Doc2, Simon Félix1
1Laboratoire d'Acoustique de l'Université du Mans (LAUM), UMR 6613, Institut d'Acoustique Graduate School (IA-GS), CNRS, Le Mans Université, Avenue Olivier Messiaen, 72085 Le Mans, France.
The Journal of the Acoustical Society of America
|March 28, 2024
概括
这项研究分析了有限的外中的喇定向性,揭示了外衍射可以扩展恒定定向性的喇带宽. 拟议的方法对于宽带分析是准确和快速的.
科学领域:
- 声学 声学 在声学上
- 电磁学 电磁学 电磁学 电磁学
- 天线理论天线理论
背景情况:
- 光束宽度对于恒定定向角设计至关重要.
- 之前的研究集中在半空间辐射或理想化的几何学.
- 在有限的围中,角的定向性仍未得到充分探索.
研究的目的:
- 为了研究轴对称角在有限的圆柱体外中的光束宽度行为.
- 开发用于远场定向模式的分析解决方案.
- 为了探索频率,外尺寸和喇形状对光束宽度的影响.
主要方法:
- 为远场定向提出了一种优雅的多式联运解决方案.
- 开发了一种适合的模型,用于由于外衍射而导致低频光束收窄.
- 分析了随着法兰宽度的增加而出现的非对称行为.
主要成果:
- 波束宽度的变化取决于频率,外大小和喇形状.
- 体衍射显著影响低频段的光束收窄.
- 喇形状决定了高频率的方向性特征.
结论:
- 可以利用围衍射效应来扩展恒定定向角的带宽.
- 与FEM相比,分析方法对于宽带分析是准确和高效的.
- 该方法适用于各种角口速度分布和边缘配置.
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