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Aeroacoustic topology optimization of noise barrier based on Lighthill's acoustic analogy

Title
Aeroacoustic topology optimization of noise barrier based on Lighthill's acoustic analogy
Author
윤길호
Keywords
Topology optimization; Aeroacoustic sound source; Lighthill's acoustic analogy; Noise barrier
Issue Date
2020-09
Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Citation
JOURNAL OF SOUND AND VIBRATION, v. 483, article no. 115512
Abstract
Topology optimization for the shape of noise barrier taking into account the aeroacoustic sound source is presented based on Lighthill's acoustic analogy approach. In the previous acoustic topology optimization based on the Helmholtz equation, only simple acoustic sound sources were taken into account. To overcome this limitation, the present aeroacoustic topology optimization is performed using Lighthill's equation that represents the sound propagation by an aeroacoustic sound source. In this study, aeroacoustic sound sources are randomly generated through the stochastic noise generation and radiation method. As an interpolation method of material properties by continuous design variables, the linear filter and the sigmoid penalty function are used. The top shape of noise barrier is designed by the optimization examples for various conditions, such as random aeroacoustic sound sources, interpolation methods, and target frequencies. (c) 2020 Elsevier Ltd. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0022460X20303448?via%3Dihubhttps://repository.hanyang.ac.kr/handle/20.500.11754/170822
ISSN
0022-460X; 1095-8568
DOI
10.1016/j.jsv.2020.115512
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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