CAAV SEMINAR: Dr Tao Yang

Dr Tao Yang

Department of Mechanical Engineering, Technical University of Munich, Germany

SPEAKER BIO: My scientific research started in 2010, focusing on fibre-reinforced composites crafted with 3D woven structures and epoxy resin, with a particular emphasis on investigating the influence of structural variations and moulding techniques on the mechanical properties of these composites. Subsequently, in 2014, I embarked on my doctoral journey at the Technical University of Liberec (TUL) to pursue a Doctor of Philosophy degree. Over the following five years, my research efforts were dedicated to exploring the acoustic properties of fibrous materials. I mainly determined the effect of structural parameters on the acoustic properties, and the modelling the acoustic behaviour of fibrous materials. Later, I worked at TUL around three years. In this period, I focused on inverse characterization of fibrous material via acoustic and airflow penetration methods. In 2022, I moved to Munich to embark on a two-year project with Prof. Steffen Marburg at the Technical University of Munich (TUM), supported by a Marie Skłodowska-Curie Postdoctoral Fellowship. Presently, my objective is to further advance my research career independently, seeking to acquire frontier and advanced knowledge, particularly in acoustic science.

ABSTRACT:  As a typical type of porous materials, fibrous materials have been widely used in acoustic treatment, such as sound absorption panels, baffles, and curtains. Their intricate structure and high porosity make them effective in attenuating sound waves by converting acoustic energy into heat through mechanisms like viscous and thermal effects. The modelling aspect of fibrous materials involves empirical and semi-phenomenological models to predict their acoustic behaviour. In sound absorption, fibrous materials excel due to their ability to trap and dissipate sound energy. It is necessary to understand the underlying principles of sound absorption in fibrous materials, exploring how factors like fibre density, arrangement, and material thickness influence absorption characteristics. Inverse characterization techniques play a pivotal role in determining the non-acoustic properties of fibrous materials. By employing impedance tube measurement methods and mathematical models, it is possible to obtain valuable information about the material's characteristics. Overall, the talk aims to provide a comprehensive understanding of the integration of fibrous materials in acoustic engineering, emphasizing the synergy between modelling, inverse characterization, and optimization for the development of effective and efficient sound absorption solution.