This study explores the application of the amplitude-modulated vibro-acoustic (AMVA) technique for in-situ monitoring of structures under compressive loads. The AMVA technique employs an amplitude-modulated pump wave combining two low frequencies, fL1 and fL2 (fL1<fL2). While this approach allows for the transmission of signal at fL2, it also facilitates the transmission of fL1, corresponding to the natural frequency of the structure. This amplitude-modulated pump wave breaks the limitation of signal emitters by extending the frequency range, making AMVA more versatile. Additionally, the amplitude-modulated pump wave has lower energy consumption, making AMVA particularly suited for long-term structural health monitoring.

中文翻译：

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使用振动声学技术对石墨烯增强砂浆在负载下进行原位监测：理论、数值和实验研究


本研究探讨了调幅振动声学 （AMVA） 技术在压缩载荷下结构原位监测中的应用。AMVA 技术采用结合了两个低频 fL1 和 fL2 （fL1<fL2） 的调幅泵浦波。虽然这种方法允许在 fL2 处传输信号，但它也促进了 fL1 的传输，对应于结构的固有频率。这种幅度调制的泵浦波通过扩展频率范围打破了信号发射器的限制，使 AMVA 更加通用。此外，调幅泵波具有较低的能耗，使 AMVA 特别适用于长期结构健康监测。