The structure-borne power in bending waves is well understood, and has been studied by many investigators in ideal beam and plate structures. All studies to date, however, have considered only the structural intensity induced by deterministic, localized drives. Since many structures of practical interest are excited by spatially random pressure fields, such as diffuse and turbulent boundary layer pressure fluctuations, techniques for measuring and predicting the structural intensity patterns in flat plates excited by such fields are presented here. The structural intensity at various frequencies in a simply supported, baffled, flat plate driven by a diffuse pressure field is simulated using analytical techniques and measured by post-processing data from a scanning laser Doppler vibrometer and reference accelerometer using finite differencing techniques. The measured and simulated fields are similar, and show intensity patterns different from those caused by deterministic point drives. Specifically, no clear source regions are apparent in the randomly driven intensity fields, although the energy flow patterns do clearly converge toward a point damper attached to the plate.
Skip Nav Destination
e-mail: sah@wt.arl.psu.edu
Article navigation
October 2005
Technical Papers
Simulating and Measuring Structural Intensity Fields in Plates Induced by Spatially and Temporally Random Excitation
Stephen A. Hambric
Stephen A. Hambric
Applied Research Laboratory,
e-mail: sah@wt.arl.psu.edu
The Pennsylvania State University
, PO Box 30, State College, PA 16804
Search for other works by this author on:
Michael J. Daley
Stephen A. Hambric
Applied Research Laboratory,
The Pennsylvania State University
, PO Box 30, State College, PA 16804e-mail: sah@wt.arl.psu.edu
J. Vib. Acoust. Oct 2005, 127(5): 451-457 (7 pages)
Published Online: January 6, 2005
Article history
Received:
August 11, 2004
Revised:
January 6, 2005
Citation
Daley, M. J., and Hambric, S. A. (January 6, 2005). "Simulating and Measuring Structural Intensity Fields in Plates Induced by Spatially and Temporally Random Excitation." ASME. J. Vib. Acoust. October 2005; 127(5): 451–457. https://doi.org/10.1115/1.2013299
Download citation file:
Get Email Alerts
Numerical Analysis of the Tread Grooves’ Acoustic Resonances for the Investigation of Tire Noise
J. Vib. Acoust (August 2024)
Related Articles
A Method to Simulate Structural Intensity Fields in Plates and General Structures Induced by Spatially and Temporally Random Excitation Fields
J. Vib. Acoust (February,2009)
Fully Lagrangian
Modeling of Dynamics of MEMS With Thin Beams—Part II: Damped
Vibrations
J. Appl. Mech (September,2009)
Frequency Response of a Viscously Damped Flat Plate
J. Appl. Mech (July,2011)
An Investigation of an Impact Vibration Absorber With Hysteresis Damping
J. Pressure Vessel Technol (November,2006)
Related Proceedings Papers
Related Chapters
Pulsation and Vibration Analysis of Compression and Pumping Systems
Pipeline Pumping and Compression Systems: A Practical Approach, Second Edition
Pulsation and Vibration Analysis of Compression and Pumping Systems
Pipeline Pumping and Compression System: A Practical Approach, Third Edition
Occlusion Identification and Relief within Branched Structures
Biomedical Applications of Vibration and Acoustics in Therapy, Bioeffect and Modeling