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Effectiveness of Power-Law Profile Indentations on Structure-Borne Noise
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 5, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
A study on the effect of indenting power-law shaped profiles on the flexible structures for investigating the vibration damping characteristics using computational simulation method is discussed. The simulation results are checked to see the impact of such features on the damping behavior of flexible structures responsible for radiating noise when excited with fluctuating loads. Though the conventional remedies for solving Noise and vibration issues generally involves tuning of structure stiffness or damping treatment this paper gives an insight on the idea of manipulation of elastic waves within the flexible structure itself to minimize the cross-reflections of the mechanical waves. The simulation studies mentioned in this paper not only hovers over the effectiveness of such features but also will be helpful for the engineers to look through a different perspective while solving N&V issues using simulation tools. In this paper, different studies are discussed to see the impact of such features on the damping effect of the vibrating structure comparing mobility response and far-field sound pressure response as well. Propagation of waves within the structure is recorded at different time intervals to visualize the reduction in the reflective coefficient of the features responsible for attenuation of responses. For validation, the simulation results are generated for the already available experimental results performed by some researchers showing a good correlation as well.
CitationNair, P., Karmakar, N., Curtis, J., and Maddipati, S., "Effectiveness of Power-Law Profile Indentations on Structure-Borne Noise," SAE Technical Paper 2019-01-1496, 2019, https://doi.org/10.4271/2019-01-1496.
Data Sets - Support Documents
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- Mironov, M.A. , “Propagation of a Flexural Wave in a Plate Whose Thickness Decreases Smoothly to Zero in a Finite Interval,” Soviet Physics - Acoustics 34:318-319, 1988.
- Krylov, R.V.V. , “Experimental Investigation of the Acoustic Black Hole Effect for Flexural Waves in Tapered Plates,” Journal of Sound and Vibration 300(1-2):43-49, 2007.
- Denis, A.P.C.T.F.G.V. , “Improvement of the Acoustic Black Hole Effect by Using Energy Transfer Due to Geometric Nonlinearity,” International Journal of Non-Linear Mechanics 94:134-145, 2017.
- Denis, V. , “Vibration Damping in Beams Using the Acoustic Black Hole Effect,” 2014.
- Liang, H.J.J.Q.L.C.Y.W.C.Z.Y. , “Finite Element Simulations of Acoustic Black Holes as Lightweight Damping Treatments for Automotive Body Panels with Application to Full Vehicle Interior Wind Noise Predictions,” in IEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM, Hamburg, 2018.
- Bowyer, D.O.V.K.J.H.E.P. , “Effect of Geometrical and Material Imperfections on Damping Flexural Vibrations in Plates with Attached Wedges of Power Law Profile,” Applied Acoustics 73:514-523, 2012.
- Georgiev, J.C.F.G.M.M.L.SV.V.K.V.B. , “Numerical and Experimental Investigation of the Acoustic Black Hole Effect for Vibration Damping in Beams and Elliptical Plates,” in Euronoise 2009, 2009.
- Liling Tang, L.C.H.J.J.Q. , “Characterization of Acoustic Black Hole Effect using a One-Dimensional Fully-Coupled and Wavelet-Decomposed Semi-Analytical Model,” Journal of Sound and Vibration 374:172-184, 2016.
- Krylov, F.T.V.V. , “Acoustic ‘Black Holes’ for Flexural Waves as Effective Vibration Dampers,” Journal of Sound and Vibration 274:605-619, 2004.
- Liling Tang, L.C. , “Enhanced Acoustic Black Hole Effect in Beams with a Modified Thickness Profile and Extended Platform,” Journal of Sound and Vibration 391:116-126, 2017.
- Tong Zhou, L.C. , “A Resonant Beam Damper Tailored with Acoustic Black Hole Features for Broadband Vibration Reduction,” Journal of Sound and Vibration 430:174-184, 2018.
- NG, Y.A.S.F. , “Free Vibration and Buckling Analysis of Clamped Rectangular Plates of Variable Thickness by the Galerkin Method,” Journal of Sound and Vibration 135:263-274, 1989.
- Abrate, S. , “Vibration of Non-Uniform Rods and Beams,” Journal of Sound and Vibration 185(4):703-716, 1995.
- Cheng, L. , “Vibroacoustic Modeling of Mechanically Coupled Structures: Artificial Spring Technique Applied to Light and Heavy Medium,” Shock and Vibration 3(3):193-200, 1996.
- Cheng, R.L.L. , “Vibration Attenuation of Panel Structures by Optically Shaped Viscoelastic Coating with Added Weight Considerations,” Thin-Walled Structures 21:307-326, 1995.
- Feurtado, S.C.P.A. , “A Normalized Wave Number Variation Parameter for Acoustic Black Hole Design,” JASA Express Letters 136(2):148-152, 2014.
- Krylov, V. , “Geometrical-Acoustics Approach to the Description of Localized Vibrational Modes of an Elastic Solid Wedge,” Soviet Physics - Technical Physics 35(2):137-140, 1990.
- Bowyer, V.K.E.P. , “Sound Radiation of Rectangular Plates Containing Tapered Indentations of Power-Law Profile,” Proceeding of Meetings on Acoustics 18, 2013.
- O’Boy, V.K.D.J. , “Damping of Flexural Vibrations in Circular Plates with Tapered Central Holes,” Journal of Sound and Vibration 330:2220-2236, 2011.
- Bowyer, V.K.E.P. , “Slots of Power-Law Profile as Acoustic Black Holes for Flexural Waves in Metallic and Composite Plates,” Structures 6:48-58, 2016.
- Zhao, F.S.S.C.L. , “Enhanced Vibration Based Energy Harvesting Using Embedded Acoustic Black Holes,” Proceedings of SPIE, 2014.
- Denis, A.P.F.G.B.E.V. , “Modal overlap Factor of a Beam with an Acoustic Black Hole Termination,” J Sound Vib 333:2475-2488, 2014.
- Mead, D.J. , Passive Vibration Control (Chichester: Wiley, 1999).