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Force Isolation by Locally Resonant Metamaterials to Reduce NVH
ISSN: 0148-7191, e-ISSN: 2688-3627
Published June 13, 2018 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Event: 10th International Styrian Noise, Vibration & Harshness Congress: The European Automotive Noise Conference
The combination of lightweight design and performant Noise, Vibrations Harshness (NVH) solutions has gained a lot of importance over the past decades. Lightweight design complies with the ever more stringent environmental requirements, however conflicts with NVH performance, as low noise and vibration levels often require heavy and bulky systems, especially at low frequencies. To face this challenge, locally resonant metamaterials come to the fore as low mass, compact volume NVH solutions, beating the mass law in some tunable frequency zones, referred to as stopbands. Metamaterials are artificial materials made from assemblies of unit cells of non-homogeneous material composition and/or topology. The local interaction between unit cells leads to superior performance in terms of noise and vibration reduction with respect to the conventional NVH treatments. Previously the authors showed how wave propagation along one-dimensional structures can be reduced by metamaterial additions. In this paper the authors apply the concept of metamaterials to reduce vibration in a complex 2D structure, excited at one specific input location. Numerical and experimental results are shown for a simplified set-up representing part of a body of a vehicle excited by a shock absorber. By adding metamaterials on a limited portion of the structure, an average of 6.8 dB with a minimum of 3 dB vibration reduction is achieved in a 50 Hz frequency band centered around the target frequency of 300 Hz, by only adding 2.4 percent of mass to the structure. The frequency band, the attenuation and the added mass are all tunable by design.
CitationSangiuliano, L., Claeys, C., Deckers, E., Pluymers, B. et al., "Force Isolation by Locally Resonant Metamaterials to Reduce NVH," SAE Technical Paper 2018-01-1544, 2018, https://doi.org/10.4271/2018-01-1544.
Data Sets - Support Documents
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- Claeys , C.C. , Deckers , E. , Pluymers , B. , and Desmet , W. A Lightweight Vibro-Acoustic Metamaterial Demonstrator: Numerical and Experimental Investigation Mechanical Systems and Signal Processing 70-71 853 880 2016 10.1016/j.ymssp.2015.08.029
- Melo , N.F. , Claeys , C. , Deckers , E. , Pluymers , B. , and Desmet , W. Dynamic Metamaterials for Structural Stopband Creation SAE International Journal of Passenger Cars-Mechanical Systems 9 3 1013 1019 2016 10.4271/2016-01-1791
- Claeys , C. , Melo , N.F. , Van Belle , L. , Deckers , E. , and Desmet , W. Design and Validation of Metamaterials for Multiple Structural Stop Bands in Waveguides Extreme Mechanics Letters 12 7 22 2017 10.1016/j.eml.2016.08.005
- Claeys , C. , Vergote , K. , Sas , P. , and Desmet , W. On the Potential of Tuned Resonators to Obtain Low-Frequency Vibrational Stop Bands in Periodic Panels Journal of Sound and Vibration 332 6 1418 1436 2013 10.1016/j.jsv.2012.09.047
- Wang , G. , Wen , X. , Wen , J. , Shao , L. , and Liu , Y. Two-Dimensional Locally Resonant Phononic Crystals with Binary Structures Physical Review Letters 93 15 154302 2004 10.1103/PhysRevLett.93.154302
- Mace , B.R. and Manconi , E. Modelling Wave Propagation in two-Dimensional Structures Using Finite Element Analysis Journal of Sound and Vibration 318 4 884 902 2008 10.1016/j.jsv.2008.04.039
- Diaz , A.R. , Haddow , A.G. , and Ma , L. Design of Band-Gap Grid Structures Structural and Multidisciplinary Optimization 29 6 418 431 2005 10.1007/s00158-004-0497-6
- Liu , Z. , Zhang , X. , Mao , Y. , Zhu , Y. et al. Locally Resonant Sonic Materials Science 289 5485 1734 1736 2000 10.1126/science.289.5485.1734
- Brillouin , L. Wave Propagation in Periodic Structures 2 McGraw-Hill Book Company 1946
- Van Belle , L. , Claeys , C. , Deckers , E. , and Desmet , W. On the Impact of Damping on the Dispersion Curves of a Locally Resonant Metamaterial: Modelling and Experimental Validation Journal of Sound and Vibration 409 1 23 2017 10.1016/j.jsv.2017.07.045
- Nateghi , A. , Van Belle , L. , Claeys , C. , Deckers , E. et al. Wave Propagation in Locally Resonant Cylindrically Curved Metamaterial Panels International Journal of Mechanical Sciences 127 73 90 2017 10.1016/j.ijmecsci.2016.07.003