题目：Aeroacoustics as Particle Displacement: Benefits and Challenges for Computational Acoustics
时间：2025年7月4日 14:00-15:30
地点：suncitygroup太阳集团 F310会议室
邀请人：吴海军 副教授（振动、冲击、噪声研究所）
Biography
Doctor Maeder is the chair of Vibroacoustics of Vehicles and Machines at the TUM School of Engineering and Design at the Technical University of Munich (TUM), Germany, from which he also received his doctoral degree. Doctor Maeder is the author and coauthor of numerous peer-reviewed journal articles, a book chapter, a patent, and over 50 conference contributions on various research topics in numerical and experimental vibroacoustics. His research is based on the pillars of fundamental theory, numerical methods, experiments, and data-driven approaches to understand wave propagation in solids and fluids and their interaction. In addition to his research, Dr. Maeder was a guest lecturer for “Noise, Vibration, and Harshness” at Tongji University, Shanghai, China. Marcus Maeder is an Associated Editor for Numerical and Computational Acoustics for Acta Acustica and the current chair of the Technical Committee on Computational Acoustics within the European Acoustics Association.
Abstract
The field of aeroacoustics has seen a vast development regarding various descriptions and methodologies as part of computational acoustics since the ground-breaking developments of Lighthill in the 1950s. Despite the ongoing development in computational power, industrial applications such as the sound radiation of airplanes result in enormous models, even with a truncated exterior domain. The situation becomes even more complex if the coupling to structural vibration must be considered. In the 1930s, a French scientist named Galbrun developed a displacement-based formulation of the acoustic wave propagation in moving fluids, which is still rather unknown in the aeroacoustic community. However, by using a Lagrangian particle displacement as the generalized unknown, the overall size of the models decreases significantly while simplifying coupling conditions. This talk reviews Galbrun’s equation, along with benefits and challenges for computational acoustics, placing a significant focus on boundary and coupling conditions for multiphysical investigations. This way, coupled problems of aeroacoustics and hydroacoustics, including elastic structures, can be solved efficiently, making complex problems easier to access using computational acoustics.
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