Yeon June Kang
서울대학교 기계공학부 · 공학
이 교수의 연구실은 유연성 있는 다공성 소음 제어 재료의 유한요소 모델링과 이를 통한 소음 및 진동 제어 기술 개발을 핵심으로 합니다. 특히 바이오-기반 다공성 재료의 동적 거동을 정확히 예측할 수 있는 Biot 이론 기반의 유한요소 해석 기법을 개발하여, 파이프나 차량 구조물 등에 적용된 소음 흡수 패널의 최적 설계를 연구하고 있습니다. 다양한 경계 조건과 기하 구조(예: 모서리, 경사면 패널)에서의 음향 및 구조적 상호작용을 분석함으로써 실용적인 소음 제어 솔루션을 제시하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
In this paper the development of a two-dimensional elastic-absorption finite element model of isotropic elastic porous noise control materials is described. A method for coupling elastic-absorption finite elements with conventional acoustic finite elements is also presented for the cases when the interface between the adjacent air space and the foam is either unfaced or sealed by a membrane. The accuracy of the acoustic/elastic-absorption model has been verified by comparing its predictions with
In this paper, methods for coupling both elastic porous material (i.e., foam) and structural finite elements with either modal or finite element representations of acoustical system are presented. In addition, interface conditions are described for coupling elastic porous material finite elements with acoustical and structural finite elements in various configurations. The foam finite element is based on the elastic porous material theory of Biot. By considering sound transmission through layere
Recently a finite element implementation of Biot’s elastic porous material theory has been developed for the purpose of modeling and optimizing foam noise control treatments [Y. J. Kang and J. S. Bolton, J. Acoust. Soc. Am. 98, 635–643 (1995)]. That finite element formulation was used in the work reported here to study normal incidence sound transmission through a foam wedge placed in a hard-walled duct. It was found that in some frequency bands the transmission loss of the wedge was significant
A finite element model for elastic porous materials is presented that allows for interfaces with adjacent acoustical media that are arbitrarily oriented with respect to the global coordinate system. The foam finite element is based on a complete elastic porous material theory that can account for all the three wave types known to be significant in foams. Example problems are used to illustrate the application of foam finite elements to the optimal design of a foam wedge terminating a waveguide.
In the past, various two- and three-dimensional Cartesian, poroelastic finite element formulations have been proposed and demonstrated. Here an axisymmetric formulation of a poroelastic finite element is presented. The intention of this work was to develop a finite element formulation that could easily and efficiently model axisymmetric sound propagation in circular structures having arbitrary, axially dependent radii, and that are lined or filled with elastic porous sound absorbing materials su
