线性共振条件下尾波干涉法（CWI）对复杂介质中微裂纹的探测与成像
Detection and imaging of microcracking in complex media using coda wave interferometry (CWI) under linear resonance conditions
摘要：
这封信介绍了超声波尾波干涉定位和图像内产生的微裂纹巩固粒状介质，聚合物混凝土的发展。结果表明，当聚合物混凝土受到线性共振时，可以通过尾波检测到微裂纹。此外，多重散射显示依赖于激发共振的平面。在这个意义上说，声发射测量下产生的弯曲共振（XY）和（XZ）平面，以验证可能的结构各向异性相关的微裂纹的存在。记录的声学签名揭示了重要的差异，在频率的内容，根据所考虑的平面，随之而来的财富在微裂纹振动过程中所涉及的机制。
英文摘要：
This letter presents the development of ultrasonic coda wave interferometry to locate and image microcracks created within consolidated granular media, polymer concrete. Results show that microcracks can be detected through coda waves when the polymer concrete is submitted to a linear resonance. In addition, the multiple scattering revealed to be dependent on the plane in which the resonance is excited. In that sense, Acoustic emission measurements were performed under flexural resonances generated in (XY) and (XZ) planes to verify the existence of a possible structural anisotropy related to microcracks. Recorded acoustic signatures revealed important differences in the frequency contents, depending on the considered plane, with a consequent wealth on the involved mechanisms during the microcracks vibrations.
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