Sound radiation from strip plates with longitudinal stiffeners using waveguide finite and boundary element methods

다국어 초록 (Multilingual Abstract)

In this study, the vibration characteristics and sound radiation of strip plates with finite width and infinite length are investigated numericallyin order to analyze the vibration and sound radiation of structures consisting of many stiffened and double-layered plates. Thewaveguide finite element approach, which is effective for waveguide structures, is applied as a numerical scheme. The sound power andradiation efficiencies for an unstiffened plate are calculated numerically via coupling boundary elements to the WFEs. Longitudinal stiffenersand additional upper plates are included in the plate model to investigate the effect of stiffeners and an upper plate on sound power andradiation efficiency. In this study, it is found that the stiffeners contribute differently to plate vibration and sound radiation, and that theradiation efficiencies of the stiffened and double plates are larger than those of the unstiffened plate due to the presence of the stiffeners.

참고문헌 (Reference)

1 C. M. Nilsson, "Waveguide finite elements applied on a car tyre" KTH 2004

2 G. Xie, "The radiation efficiency of baffled plates and strips" 280 : 181-209, 2005

3 F. G. Leppington, "The acoustic radiation efficiency of rectangular panels" 382 : 245-271, 1982

4 L. Cremer, "Structureborne Sound" Springer 2005

5 F. Fahy, "Sound and structural vibration:radiation, Transmission and Response" Academic Press 2006

6 G. Maidanik, "Response of ribbed panels to reverberant acoustic fields" 34 : 809-826, 1962

7 I. L. Ver, "Noise and Vibration Control" McGraw-Hill 287-296, 1971

8 J. Ryue, "Investigations of propagating wave types in railway tracks at high frequencies" 315 : 157-175, 2008

9 I. Prasetiyo, "Investigation of sound transmission in lightweight structures using a waveguide finite element/boundary element approach" University of Southampton 2012

10 C. M. Nilsson, "Input power to waveguides calculated by a finite element method" 305 : 641-658, 2007

11 J. Ryue, "Decay rates of propagating waves in railway tracks at high frequencies" 320 : 955-976, 2009

12 U. Orrenius, "Calculation of wave propagation in rib-stiffened plate structure" 198 (198): 203-224, 1996

13 W. L. Li, "An analytical solution for the self- and mutual radiation resistances of a rectangular plate" 245 (245): 1-16, 2001

14 C. M. Nilsson, "A waveguide finite element and boundary element approach to calculating the sound radiated by railway and tram rails" 321 : 813-836, 2009