在流体固体合下,声波晶体微通道的带隙和分散特征
1School of Information Engineering, Xi'an University, Xi'an, 710065, China. linlinwang@xawl.edu.cn.
Scientific reports
|August 9, 2025
概括
音声晶体可以抑制微通道中的振动. 液体填充改变带隙,流速影响减震,为设计抗冲击系统提供了洞察力.
科学领域:
- 机械工程 机械工程
- 材料科学 材料科学 材料科学
- 声学 声学 在声学方面
背景情况:
- 微通道中的流体-固体合会引起振动和噪声,影响设备性能和安全.
- 声波晶体提供了一种方法,通过带隙特征来抑制弹性波传播.
研究的目的:
- 为了研究在冲击激发下,在液体固体合的音声晶体微通道中抑制振动.
- 分析液体填充和流速对带隙特性和冲击减弱的影响.
主要方法:
- 通过结合转移矩阵方法和波形有限元素方法,开发了一种流体-固体合动力学模型.
- 分析了未填充和充满流体的微通道的带隙特性.
- 在不同的冲击刺激下研究过渡振动的传播和减弱.
主要成果:
- 液体填充改变了带隙,从两个 (70-90 Hz,280-690 Hz) 增加到三个 (40-65 Hz,180-340 Hz,485-735 Hz).
- 流速显著影响冲击振动抑制;较高的速度减弱由于增强的流体-固体合减弱.
- 建立了流速,结构周期性,共振单元特征和冲击振动减弱之间的定量关系.
结论:
- 声波晶体微通道显示可调节的带隙受液体填充的影响.
- 流速是这些系统中有效抑制冲击振动的关键参数.
- 该研究为设计强大的流量微通道系统提供了理论基础,并增强了抗冲击能力.
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