Studies in Stochastic Wave Propagation

本研究的目的是从理论上研究， 实验上的演化，运输和衰减的相干和 随机和扩散介质中的非相干波（扩散波）。 它涉及两个非常富有成效的NSF的二维扩展 赞助研究一维相干波传播 随机介质及其在声发射源中的应用 声发射接收器校准以及 通过内部摩擦来表征材料。 非相干 波将上述扩展到实际材料， 微观结构效应 这些研究的结果将有助于我们对波的理解 在真实的材料中的传播， 无损评价和声发射技术。

The purpose of this research is to study theoretically and experimentally the evolution, transport and decay of coherent and incoherent waves (diffused waves) in random and diffused media. It involves a two-dimensional extension of two highly fruitful NSF sponsored research on one-dimensional coherent wave propagation in random media with applications to acoustic emission source characterization, to acoustic emission receiver calibration and to material characterization through internal friction. The incoherent wave will extend the above to practical materials with pronounced microstructural effects. The results of these studies will add to our understanding on wave propagation in real materials with immediate applications to nondestructive evaluation and acoustic emission techniques.