Spatio-temporal aeroacoustic–structural responses of cavity-backed elastic panel liner exposed to grazing duct flow

Fan, Harris K. H.; Lam, Garret C. Y.; Leung, R. C. K.

doi:10.1016/j.jfluidstructs.2021.103228

Cited by 7 publications

(2 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Yu et al (2017) replaced the ordinary membrane with an electro-active membrane to realize systematic noise adjustment of attenuation effect by changing the applied voltage. Recently, Fan et al (Lam et al, 2021;Fan et al, 2015Fan et al, , 2021 have conducted systematic time-domain numerical analysis on duct-membrane silencer model from the viewpoint of aeroacousticstructural interaction based on conservation element and solution element (CE/SE) method. They found that the presence of flow along the incident wave direction might weaken the reflection.…”

Section: Introductionmentioning

confidence: 99%

Low frequency noise control in duct based on locally resonant membrane with attached resonators

Zuo

Shen

et al. 2022

Journal of Vibration and Control

View full text Add to dashboard Cite

In this paper, locally resonant membrane with attached resonators is introduced to duct system to achieve good noise control effect especially in low frequency range. A rigorous analytical model based on modal expansion method is developed to investigate the vibroacoustic coupling characteristic of proposed duct-membrane-resonator system. The corresponding theoretical results show a good agreement with numerical simulation. The velocity distribution, sound transmission loss curve, and the mechanism behind are discussed and explained deeply. It is found that the attached resonators on the membrane can lead to new transmission loss peak which is related to but not exactly equal to the resonance frequency of attached resonator itself. Correspondence between zero equivalent density mass and transmission loss peak is achieved at the non-antisymmetric modes. Compared to single resonator, multi-resonators system can realize more transmission loss peaks for better sound transmission effect. In principle, ultra-low frequency noise reduction and arbitrarily adjustable frequency can be achieved by changing the frequency, position, and number of exerted resonators, which provide a new approach for duct noise control.

show abstract

Section: Introductionmentioning

confidence: 99%

Low frequency noise control in duct based on locally resonant membrane with attached resonators

Zuo

Shen

et al. 2022

Journal of Vibration and Control

View full text Add to dashboard Cite

show abstract

“…A concept for the improvement of broadband noise absorption for acoustical liners was carried out by Barnobi [7], Follet et al [8], and recently by Dannemann et al [9] and Knobloch et al [10]. These preliminary investigations showed an improvement in the damping performance of the acoustic liners due to their hybrid structure, where flexible walls of thin film are integrated into a rigid core geometry [11].…”

Section: Introductionmentioning

confidence: 99%

Numerical Buckling Analysis of Hybrid Honeycomb Cores for Advanced Helmholtz Resonator Liners

et al. 2021

View full text Add to dashboard Cite

In order to realize novel acoustic liners, honeycomb core structures specially adapted to these applications are required. For this purpose, various design concepts were developed to create a hybrid cell core by combining flexible wall areas based on thermoplastic elastomer films and rigid honeycomb areas made of fiber-reinforced thermoplastics. Within the scope of the presented study, a numerical approach was introduced to analyze the global compressive failure of the hybrid composite core structure, considering local buckling and composite failure according to Puck and Cuntze. Therefore, different geometrical configurations of fiber-reinforced tapes were compared with respect to their deformation as well as their resulting failure behavior by means of a finite element analysis. The resulting compression strength obtained by a linear buckling analysis agrees largely with calculated strengths of the more elaborate application of the failure criteria according to Puck and Cuntze, which were implemented in the framework of a nonlinear buckling analysis. The findings of this study serve as a starting point for the realization of the manufacturing concept, for the design of experimental tests of hybrid composite honeycomb core structures, and for further numerical investigations considering manufacturing as well as material specific aspects.

show abstract

Nonlinear supersonic flutter of a composite panel backed by an acoustic cavity with finite-amplitude sound waves

Liu,

Qu,

Liu

et al. 2024

International Journal of Mechanical Sciences

View full text Add to dashboard Cite

Spatio-temporal aeroacoustic–structural responses of cavity-backed elastic panel liner exposed to grazing duct flow

Cited by 7 publications

References 19 publications

Low frequency noise control in duct based on locally resonant membrane with attached resonators

Low frequency noise control in duct based on locally resonant membrane with attached resonators

Numerical Buckling Analysis of Hybrid Honeycomb Cores for Advanced Helmholtz Resonator Liners

Nonlinear supersonic flutter of a composite panel backed by an acoustic cavity with finite-amplitude sound waves

Contact Info

Product

Resources

About