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10 May 2024 Design of lightweight broadband flexural wave absorber for noise and vibration attenuation through topological optimization
Xiaopeng Li, Taehwa Lee, Ziqi Yu, Yuyang Song, Xintong Deng
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Proceedings Volume 12946, Active and Passive Smart Structures and Integrated Systems XVIII; 1294616 (2024) https://doi.org/10.1117/12.3011036
Event: SPIE Smart Structures + Nondestructive Evaluation, 2024, Long Beach, California, United States
Abstract
A lightweight structure endowed with broadband wave absorption capabilities is highly sought in the development of vibration and noise reduction applications. In this work, we present a type of absorbing meta-barrier via topological optimization which totally absorbs the waves near the boundaries at an extremely broadband frequency range. In order to elucidate the perfect absorption mechanism, we developed a theoretical model that incorporates a lumped mass-spring-damper system coupled to a semi-infinite thin beam. The sample is fabricated through 3D printing. The absorption performance is experimentally characterized, and a maximum absorption of more 95% is achieved over a broad frequency range from 700 Hz to over 3000 Hz in the experiment. Our approach provides an effective solution to the design of lightweight broadband noise and vibration isolation/suppression devices for practical engineering applications.
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Xiaopeng Li, Taehwa Lee, Ziqi Yu, Yuyang Song, and Xintong Deng "Design of lightweight broadband flexural wave absorber for noise and vibration attenuation through topological optimization", Proc. SPIE 12946, Active and Passive Smart Structures and Integrated Systems XVIII, 1294616 (10 May 2024); https://doi.org/10.1117/12.3011036
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KEYWORDS
Vibration
Design and modelling
Signal attenuation
Standing waves
Acoustic waves
Absorption
Total internal reflection
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