Vibration suppression by mistuning acoustic black hole dynamic vibration absorbers. (6th January 2023)

• Record Type: Journal Article
• Authors: Sheng, Hui; He, Meng-Xin; Ding, Qian
• Is Part Of: Journal of sound and vibration. Volume 542(2023)
• Publication Date: 2023-01-06
• Subjects: The acoustic black hole -- Dynamic vibration absorber -- Mistuning effect; Sound -- Periodicals; Vibration -- Periodicals; Son -- Périodiques; Vibration -- Périodiques; Sound; Vibration; Periodicals; Electronic journals; 620.205
• DOI: 10.1016/j.jsv.2022.117370
• Languages: English
• ISSNs: 0022-460X

Abstract

Highlights: A modified vibration suppression strategy for beams by attaching mistuned ABH dynamic vibration absorbers. The exact dynamic model for the ABH and the whole system. Intentional mistuning effect for widening vibration attenuation bands in the frequency domain. Experimental validation of the proposed strategy. Abstract: This paper presents a modified add-on strategy to reduce the transverse vibration of beam structures using multiple acoustic black hole dynamic vibration absorbers (ABH-DVAs). The exact dynamic stiffness formulation of the system constituted by the host beam and arrays of ABH-DVAs is established. The intentional mistuning effect is introduced into the system by varying the taper lengths of ABH-DVAs, aiming at broadband vibration suppression. Several case studies are presented to demonstrate the effectiveness of the proposed strategy. In addition, the multi-objective optimization of the structure with minimum weight and broad attenuation band is investigated. From the numerical and experimental results, it is seen that the attenuation bandwidth of the proposed design is widened compared with that of the conventional design. The proposed strategy shows great potential for widening the attenuation band of the acoustic black hole structures.