对剪切-纵向对直线波混合进行信封校正,以提取绝对非线性声学参数
Zubeir M Ebrahim Saib1, Anthony J Croxford1, Bruce W Drinkwater1
1Department of Mechanical Engineering, University of Bristol, Bristol, BS8 1TR, United Kingdom.
The Journal of the Acoustical Society of America
|November 17, 2023
概括
精确的材料非线性测量需要考虑激发封面效应. 汉宁窗口音频爆发在非线性共振信号分析中提供了更高的可靠性和更低的差异.
科学领域:
- 非线性声学是一种非线性声学.
- 材料科学是一种材料科学.
- 波浪的传播方式
背景情况:
- 非线性共振信号 (NRS) 分析对于材料特性表征至关重要.
- 激发波形外可以影响测量材料非线性度的准确性.
- 提取绝对物质非线性需要精确了解波混合现象.
研究的目的:
- 研究激发包裹对非线性共振信号 (NRS) 的影响.
- 开发一种准确提取绝对材料非线性的一种方法.
- 通过实验验证理论波形校正对于对直线剪切-纵向波混合.
主要方法:
- 有限差异时间域 (FDTD) 建模以模拟NRS上的波形效应.
- 波形校正因子的理论推导.
- 使用不同的输入波形和振幅进行实验验证.
- 使用修正后的NRS数据提取了Murnaghan常数 (m).
主要成果:
- 当改变输入波形时,观察到测量的非线性有显著的变化 (矩形 vs. 汉宁窗口音色爆发).
- 为了将NRS映射到参考幅度,我们得出了理论纠正,并进行了实验验证.
- 与矩形输入相比,汉宁色调爆发输入在提取的材料属性上的差异较小.
- 通过验证的校正方法成功提取了穆尔纳根常数 (m).
结论:
- 激发外显著影响非线性共振信号测量.
- 汉宁窗口音色爆发提供了更可靠和精确的绝对材料非线性测量.
- 开发的校正方法可以通过对直线波混合来准确确定像穆尔纳根常数 (m) 这样的材料特性.
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