带隙预测单独的横向光束的压电声波晶体
Xudong Wu1, Jiaxing Luo1, Yixiang Qu1
1School of Automotive Studies, Tongji University, Shanghai 201804, China.
The Journal of the Acoustical Society of America
|April 7, 2025
概括
这项研究引入了一种新的方法,用于预测压电声波晶体 (PPC) 的带隙特征. 这可以通过调整结构参数来更快,更准确地控制振动和能量收集.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 固态物理 固态物理
背景情况:
- 压电声波晶体 (PPC) 提供了对弹性波带间隙的控制.
- 应用包括减轻振动和收集能量.
- 有针对性的带隙调制至关重要,但在频率快速变化时具有挑战性.
研究的目的:
- 开发一个快速而准确的带隙预测方法,用于单梁PPCs.
- 为了提高在动态频率变化下目标带隙调制的效率.
- 提供一种定量方法来表征带隙频率.
主要方法:
- 使用平面波膨胀和等效弹性模量方法.
- 开发了一种同等的动态刚度计算方法,包括曲时刻.
- 创建了一个特定的带隙预测模型,用于单梁PPC.
- 提出了基于参数分析的近距离因子计算方法.
主要成果:
- 拟议的方法可以从PPC结构参数中快速获取带隙特征.
- 在快速目标频率转移期间显著提高目标调制效率.
- 通过模拟和实验验证验证的有效性.
结论:
- 开发的带隙预测方法对于单梁PPC是有效的.
- 便于高效精确地控制带隙属性.
- 支持振动控制和能量收集应用的进步.
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