对具有多个扭曲通道的可堆叠和可扩展声学元材料的影响因素的分析
Shaohua Bi1, Fei Yang1, Xinmin Shen1
1Field Engineering College, Army Engineering University of PLA, Nanjing 210007, China.
Materials (Basel, Switzerland)
|October 28, 2023
概括
一种具有多个曲通道 (SEAM-MTCs) 的可堆叠和可扩展的新型声学元材料有效降低设备噪声. 增加层增强了在广泛的频率范围内的声音吸收,证明了其在降噪应用中的潜力.
科学领域:
- 声学 声学 在声学方面
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
背景情况:
- 大型机械设备产生大量噪音,影响环境,需要有效的降噪解决方案.
- 声学超材料为声音操纵提供可调节的特性,但需要具有可扩展性和适应性的设计.
- 现有的降噪方法可能缺乏效率或适用于不同规模的设备.
研究的目的:
- 开发一种可堆叠和可扩展的声学超材料,具有多个曲通道 (SEAM-MTC).
- 研究设计参数对SEAM-MTC声学性能的影响.
- 为了验证开发的超材料在设备降噪方面的有效性.
主要方法:
- 使用模块化组件设计和制造SEAM-MTC (奇偶面板,偶面板,腔室,封闭板).
- 声学有限元模拟来分析参数的影响,如层数 (N),面板厚度 (t0),光圈大小 (a) 和腔室深度 (T0).
- 声吸收系数的实验验证,以确认模拟的准确性.
主要成果:
- 响应频率的数量从13增加到31,因为层数量 (N) 从2增加到6.
- [200 Hz, 6000 Hz]范围内的平均声音吸收系数随着层次的增加而从0.5169提高到0.6160.
- 实验结果显示,与 [200 Hz, 1600 Hz] 范围内的模拟数据有很好的一致性.
结论:
- 拟议的SEAM-MTC展示了一种可扩展和有效的降噪方法.
- 通过调整诸如层数等参数,可以调整设计的性能.
- 在减少大型机械设备的噪音方面,SEAM-MTC显示出实践应用的巨大潜力.
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