READ ME File For 'Directivity of sound radiated from baffled rectangular plates and plate strips'

Dataset DOI: 10.5258/SOTON/D0931

ReadMe Author: David Thompson, University of Southampton, ORCID: 0000-0002-7964-5906

This dataset supports the publication:
AUTHORS: Qi Li, David J Thompson
TITLE: "Directivity of sound radiated from baffled rectangular plates and plate strips"
JOURNAL: Applied Acoustics
PAPER DOI: not known


This dataset contains:

Data relating to all figures

The figures are as follows:

Figure 1. Spectra of sound pressure levels during the train pass-by time (80 km/h) at the same plane position but two different longitudinal positions along a real U-shaped girder bridge
Figure 3. Angular directivity indices D_theta,f (r,xi) for a rectangular piston (r/a = 10): (a) fe = 400 Hz, ka = 1.83; (b) fe = 2000 Hz, ka = 9.16; (c) fe = 4000 Hz, ka = 18.3; (d) fe = 10000 Hz, ka = 45.8
Figure 4. Angular directivity indices D_theta,f (r,xi)  for a plate with simple boundary conditions along the four edges (SSSS) and under a single force (Plate A, fc = 2444 Hz, xf/a = -0.37, yf/b = -0.53): (a) fe = 400 Hz, fe /fc = 0.16, ka = 1.83; (b) fe = 2000 Hz, fe /fc = 0.82, ka = 9.16; (c) fe = 4000 Hz, fe /fc = 1.64, ka = 18.3; (d) fe = 10000 Hz, fe /fc = 4.10, ka = 45.8
Figure 5. Variation of averaged angular directivity and modal density with frequency for different plates (SSSS, xf/a = -0.37, yf/b = -0.53, r/a = 10): (a) maximum value of D_theta,f (r), aspect ratio 1.2; (b) dominant radiation angle theta_m, aspect ratio 1.2; (c) number of modes in each one-third octave band, aspect ratio 1.2; (d) maximum value of D_theta,f (r), aspect ratio 4; (e) dominant radiation angle theta_m, aspect ratio 4.0; (f) number of modes in each one-third octave band, aspect ratio 4.0
Figure 6. Maximum value of D_theta,f (r) against number of modes in each one-third octave band for steel plates of different sizes and subjected to single force
Figure 7. Angular directivity indices D_theta,f (r,xi) for plate strips (SSSS, xf/a = -0.37, yf/b = -0.51, r/a = 10): (a) Plate F,  fe = 1000 Hz, fe /fc = 0.82, ka = 9.16; (b) Plate F, fe = 2000 Hz, fe /fc = 1.64, ka = 18.3; (c) Plate G,  fe = 50 Hz, fe /fc = 0.72, ka = 1.34; (d) Plate G, fe =315 Hz, fe /fc = 4.52, ka = 8.66 
Figure 8. Variation of averaged angular directivity with frequency (SSSS, xf/a = -0.37, yf/b = -0.53, r/a = 10): (a) maximum value of D_theta,f (r); (b) dominant radiation angle; (c) standard deviation of maximum values of D_theta,f (r,xi) with respect to xi direction; (d) standard deviation of the dominant sound radiation angles with respect to xi direction
Figure 9. Variation of averaged angular directivity with frequency subjected to a single force at different positions (SSSS, r/a = 10): (a) maximum value of D_theta,f (r); (b) dominant radiation angle 
Figure 10. Angular directivity indices D_theta (r,xi) for plate strips subjected to 25 incoherent forces across the plate (SSSS, r/a = 10): (a) Plate F,  fe = 1000 Hz, fe /fc = 0.82, ka = 9.16; (b) Plate F, fe = 2000 Hz, fe /fc = 1.64, ka = 18.3; (c) Plate G,  fe = 50 Hz, fe /fc = 0.72, ka = 1.34; (d) Plate G, fe =315 Hz, fe /fc = 4.52, ka = 8.66
Figure 11. Longitudinal directivity indices D_xi (r,theta) at dominant radiation angles for the plate strips subjected to 25 incoherent forces across the plate (SSSS, r/a = 10): (a) Plate F; (b) Plate G 
Figure 12. Longitudinal directivity indices D_xi (r,theta) at dominant radiation angles for the pate strips subjected to 20 incoherent forces along the length direction (SSSS, xf/a = -0.37, r/a = 10): (a) Plate F; (b) Plate G 
Figure 13. Variation of averaged angular directivity with frequency for the plate strips subjected to 25 incoherent forces across the plate (SSSS, r/a = 10): (a) maximum value of D_theta,f (r); (b) dominant radiation angle; (c) standard deviation of maximum values of D_theta,f (r,xi) with respect to xi direction; (d) standard deviation of the dominant sound radiation angles with respect to xi direction
Figure 14. Variation of averaged angular directivity with frequency for the concrete plate strips of different aspect ratio (b/a) and subjected to 25 incoherent forces across the plate (SSSS, r/a = 10, h = 250 mm): (a) maximum value of D_theta (r); (b) standard deviation of maximum values of D_theta (r,xi) with respect to xi direction 
Figure 15. Variation of averaged angular directivity with frequency for the concrete plate strips of different aspect ratio (b/a) and subjected to 25 incoherent forces across the plate (SSSS, r/a = 10, h = 125 mm): (a) maximum value of D_theta (r); (b) standard deviation of maximum values of D_theta (r,xi) with respect to xi direction 
Figure 16. Maximum value of D_theta,f (r) against number of modes in each one-third octave band for concrete plate of different sizes and subjected to 25 incoherent forces. 
Figure 17. Variation of averaged angular directivity with frequency for plate strips subjected to 25 incoherent forces across the plate and with various boundary conditions ( r/a = 10): (a) Plate F, maximum value of D_theta (r); (b) Plate F, dominant radiation angle;  (c) Plate G, maximum value of D_theta (r); (d) Plate G, dominant radiation angle
Figure 18. Number of modes in each 1/3 octave band for plate strips with various boundary conditions: (a) Plate F; (b) Plate G
Figure 19. Variation of averaged angular directivity with frequency for the plate F with various boundary conditions and subjected to 25 incoherent forces across the plate (r/a = 10): (a) standard deviation of maximum values of D_theta (r,xi) with respect to xi direction; (b) standard deviation of the dominant sound radiation angles
Figure 20. Averaged angular intensity indices D_theta (r) for the strips vibrating in 3D and 2D modes (xf/a = -0.37, r/a = 10): (a) Plate F,  fe = 1000 Hz, fe /fc = 0.82, ka = 9.16; (b) Plate F, fe = 2000 Hz, fe /fc = 1.64, ka = 18.3; (c) Plate G,  fe = 50 Hz, fe /fc = 0.72, ka = 1.34; (d) Plate G, fe =315 Hz, fe /fc = 4.52, ka = 8.66
Figure 21. Angular directivity indices D_theta (r,xi) for baffled and unbaffled Plate G subjected to 5 incoherent forces along the length direction (SSSS, r/a = 10, xf/a = -0.37, fe = 315 Hz, fe /fc = 4.52, ka = 8.66): (a) xi/b=-7/8; (b) xi/b=-5/8; (c) xi/b=-3/8; (d) xi/b=-1/8


Date of data collection: 12 March 2018

Information about geographic location of data collection: Tongji University, China

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Date that the file was created: June, 2019