Abstract
This paper investigates the vibro-acoustic behavior of flexible micro-perforated plates through a finite element method approach, in which each single orifice can be modeled independently. The role of the vibrations on the local orifice impedance values is included in the numerical model and analyzed for the case of PVC perforated plates with different orifice sizes. Two expressions for the modified local orifice impedance are compared, depending on the extension of the correction to the attached mass of air at the orifice ends or not. The effect on the global plate absorption properties is quantified. It is found that accounting for the orifice impedance alteration through the structural motion is more important for larger orifice diameters and at low frequency. This effect is nevertheless rather limited for the investigated micro-perforated plates and can be neglected in first instance.
| Original language | English |
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| Title of host publication | Proceedings of ISMA 2016 - International Conference on Noise and Vibration Engineering and USD2016 - International Conference on Uncertainty in Structural Dynamics |
| Place of Publication | Leuven |
| Publisher | Katholieke Universiteit Leuven |
| Pages | 407-421 |
| Number of pages | 15 |
| ISBN (Electronic) | 9789073802940 |
| Publication status | Published - 1 Jan 2016 |
| Event | 27th International Conference on Noise and Vibration Engineering, ISMA 2016 and International Conference on Uncertainty in Structural Dynamics, USD2016 - Leuven, Belgium Duration: 19 Sept 2016 → 21 Sept 2016 |
Conference
| Conference | 27th International Conference on Noise and Vibration Engineering, ISMA 2016 and International Conference on Uncertainty in Structural Dynamics, USD2016 |
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| Country/Territory | Belgium |
| City | Leuven |
| Period | 19/09/16 → 21/09/16 |