GOALI: Robust and Effective Reconstruction of Transient Acoustic Radiation

本项目的目标是开发一种强大而有效的传感技术，以重建受任意时间相关激励的复杂振动结构的声辐射。本研究的最终目的是为实际的工程师提供一个多功能和强大的工具来可视化复杂结构（如汽车或飞机）的振动声源。为提高非理想环境下声场重建的精度和效率，本文将重点研究一种优化的正则化方法。特别是，从附近表面声反射的影响和声辐射的瞬态性质，从来没有在传统的近场声全息（NAH）处理，将被考虑。通过使人们能够“看到”声音从声源传播并与周围流体介质和结构相互作用的过程，所进行的研究将对更好地理解声辐射产生广泛的影响。这种可视化技术也将显著提高声学课堂教学的有效性。教育计划的目标是将拟议的研究与韦恩州立大学机械工程系的本科和研究生课程相结合，这将对学生的声学和噪声控制学习产生重大影响。

The objective of this project is to develop a robust and effective sensing technology to reconstruct acoustic radiation from a complex vibrating structure subjected to an arbitrarily time-dependent excitation. The ultimate goal of this investigation is to provide practicing engineers with a versatile and powerful tool to visualize vibro-acoustic sources of complex structures such as automobiles or airplanes. Special attention will be given to developing an optimal regularization method to enhance accuracy and efficiency of reconstruction of an acoustic field in a non-ideal environment. In particular, the effect of acoustic reflection from nearby surfaces and transient nature of acoustic radiation that have never been addressed in the traditional near-field acoustic holography (NAH), will be considered. The research undertaken will have a broad impact on providing a better understanding of acoustic radiation by enabling one to "see" sound as it propagates away from a source and interacts with surrounding fluid medium and structures. This visualization technology will also significantly enhance the effectiveness of classroom teaching of acoustics. The goal of education plan is to integrate the proposed research with undergraduate and graduate programs in the Department of Mechanical Engineering at Wayne State University (WSU), which will have a significant impact on student learning of acoustics and noise control.