Studies in Stochastic Wave Propagation

本研究的目的是从理论和实验上研究相干波和非相干波(扩散波)在随机和扩散介质中的演化、传输和衰减。它包括由美国国家科学基金会赞助的两项卓有成效的研究的二维扩展，该研究涉及一维相干波在随机介质中的传播，以及在声发射源表征、声发射接收器校准和通过内耗进行材料表征方面的应用。非相干波将上述情况扩展到具有明显微结构效应的实际材料中。这些研究的结果将加深我们对波在真实材料中传播的理解，并立即应用于无损评估和声发射技术。

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.