• 144 Citations
  • 7 h-Index
20072019
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Research Output 2007 2019

2019

Acoustic excitation of a flanged joint

Jerome, T. W., Shepherd, M. R. & Hambric, S. A., Jan 1 2019, Nonlinear Dynamics - Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018. Kerschen, G. (ed.). Springer New York LLC, Vol. 1. p. 211-224 14 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Flanges
Acoustics
Rivets
Hammers
Bolts

Experimental Demonstration of a Tunable Acoustoelastic System

Fowler, D., Lopp, G., Bansal, D., Schultz, R., Brake, M. & Shepherd, M. R., Jan 1 2019, Rotating Machinery, Vibro-Acoustics and Laser Vibrometry, Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018. Di Maio, D. (ed.). Springer New York LLC, p. 179-189 11 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Demonstrations
Acoustics
Dynamic response

Numerical Modeling of an Enclosed Cylinder

Schultz, R. & Shepherd, M. R., Jan 1 2019, Rotating Machinery, Vibro-Acoustics and Laser Vibrometry, Proceedings of the 36th IMAC, A Conference and Exposition on Structural Dynamics 2018. Di Maio, D. (ed.). Springer New York LLC, p. 191-197 7 p. (Conference Proceedings of the Society for Experimental Mechanics Series).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Fluids
Analytical models
Boundary conditions
Hardware
2018

A comparison of fractional-sized to full-sized cellos

Blanford, T. E., Shepherd, M. R. & Jerome, T. W., Jan 1 2018, In : Proceedings of Meetings on Acoustics. 33, 1, 035002.

Research output: Contribution to journalConference article

strings
impedance
proportion
tuning
vibration

Modeling and measurement of a tunable acoustoelastic system

Fowler, D., Lopp, G., Bansal, D., Schultz, R., Brake, M. & Shepherd, M. R., Jun 1 2018, Sound and Vibration, 52, 3, p. 12-17 6 p.

Research output: Contribution to specialist publicationArticle

Acoustics
acoustics
material absorption
Dynamic response
cavities
1 Citation (Scopus)

Optimal design and position of an embedded one-dimensional acoustic black hole

McCormick, C. A. & Shepherd, M. R., Jan 1 2018.

Research output: Contribution to conferencePaper

acoustics
damping
optimization
tapering
resources
2017

Estimating material wavespeed using the wavenumber transform of rectangular plate mode shapes

Shepherd, M. R., Jan 1 2017, Rotating Machinery, Hybrid Test Methods, Vibro-Acoustics and Laser Vibrometry - Proceedings of the 35th IMAC, A Conference and Exposition on Structural Dynamics. Springer New York LLC, Vol. 8B. p. 41-46 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Hammers
Modal analysis
Frequency response
Natural frequencies
Damping
5 Citations (Scopus)
structural vibration
boundary layer flow
Boundary layer flow
turbulent boundary layer
Boundary layers
1 Citation (Scopus)

Quieting a rib-framed honeycomb core sandwich panel for a rotorcraft roof

Hambric, S. A., Shepherd, M. R., Schiller, N. H., Snider, R. & May, C., Jan 1 2017, In : Journal of the American Helicopter Society. 62, 1, 012009.

Research output: Contribution to journalArticle

Roofs
Acoustic waves
Acoustics
Insulator Elements
Speech intelligibility
acoustic coupling
matrices
acoustics
formulations
fluids
1 Citation (Scopus)

Vibration amplitude and fastener torque dependence of damping in a jointed structure

Jerome, T. W., Hambric, S. A. & Shepherd, M. R., Jan 1 2017, 29th Conference on Mechanical Vibration and Noise. American Society of Mechanical Engineers (ASME), (Proceedings of the ASME Design Engineering Technical Conference; vol. 8).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Fasteners
Vibrations (mechanical)
Torque
Damping
Vibration
2016
9 Citations (Scopus)

Multi-objective optimization of acoustic black hole vibration absorbers

Shepherd, M. R., Feurtado, P. A. & Conlon, S. C., Sep 1 2016, In : Journal of the Acoustical Society of America. 140, 3, p. EL227-EL230

Research output: Contribution to journalArticle

absorbers
vibration
optimization
acoustics
tapering
2015
3 Citations (Scopus)
boundary element method
resonant frequencies
fluids
damping
modal response
3 Citations (Scopus)

Experimental evidence of modal wavenumber relation to zeros in the wavenumber spectrum of a simply supported plate (L)

Robin, O., Berry, A., Atalla, N., Hambric, S. A. & Shepherd, M. R., May 1 2015, In : Journal of the Acoustical Society of America. 137, 5, p. 2978-2981 4 p.

Research output: Contribution to journalArticle

thin plates
2 Citations (Scopus)

Measurements of the air-borne and structure-borne sound power transmission through a quiet honeycomb core sandwich panel for a rotorcraft roof

Hambric, S. A., Shepherd, M. R. & Schiller, N. H., 2015, INTER-NOISE 2015 - 44th International Congress and Exposition on Noise Control Engineering. The Institute of Noise Control Engineering of the USA, Inc.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

honeycomb cores
rotary wing aircraft
power transmission
roofs
acoustics

Structural-acoustic optimization of a pressurized, ribbed panel

Shepherd, M. R. & Hambric, S. A., Jan 1 2015, In : Proceedings of Meetings on Acoustics. 22, 1, 065003.

Research output: Contribution to journalConference article

optimization
acoustics
cabins
boundary layer flow
pushing
5 Citations (Scopus)

Vibration control using grids of acoustic Black Holes: How many is enough?

Conlon, S. C., Fahnline, J. B., Shepherd, M. R. & Feurtado, P. A., 2015, INTER-NOISE 2015 - 44th International Congress and Exposition on Noise Control Engineering. The Institute of Noise Control Engineering of the USA, Inc.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

grids
vibration
acoustics
cells
structural vibration
2014
8 Citations (Scopus)
curved panels
boundary layer flow
turbulent boundary layer
acoustics
fluids
2 Citations (Scopus)

Quieting a rib-framed honeycomb core sandwich panel for a rotorcraft roof

Hambric, S. A., Shepherd, M. R., Snider, R. & May, C., Jan 1 2014, INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control. Davy, J., Burgess, M., Don, C., Dowsett, L., McMinn, T. & Broner, N. (eds.). Australian Acoustical Society, (INTERNOISE 2014 - 43rd International Congress on Noise Control Engineering: Improving the World Through Noise Control).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

honeycomb cores
rotary wing aircraft
roofs
transmission loss
static loads
7 Citations (Scopus)

Structural-Acoustic Optimization

Marburg, S., Shepherd, M. R. & Hambric, S. A., Jan 1 2014, Engineering Vibroacoustic Analysis: Methods and Applications. wiley, p. 268-304 37 p.

Research output: Chapter in Book/Report/Conference proceedingChapter

Acoustics
Acoustic properties
Fluid structure interaction
Sensitivity analysis
Hardware
2 Citations (Scopus)

The effects of wood variability on the free vibration of an acoustic guitar top plate

Shepherd, M. R., Hambric, S. A. & Wess, D. B., Nov 1 2014, In : Journal of the Acoustical Society of America. 136, 5, p. EL357-EL361

Research output: Contribution to journalArticle

free vibration
acoustics
moisture content
resonant frequencies
prototypes
2013
10 Citations (Scopus)
Bearings (structural)
transmissions (machine elements)
journal bearings
Journal bearings
simulation
3 Citations (Scopus)

Vibro- Acoustic measurements and simulations of a rib-framed honeycomb core sandwich panel

Hambric, S. A., Shepherd, M. R., May, C. & Snider, R., Jan 1 2013, 42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013: Noise Control for Quality of Life. OAL-Osterreichischer Arbeitsring fur Larmbekampfung, p. 4059-4068 10 p. (42nd International Congress and Exposition on Noise Control Engineering 2013, INTER-NOISE 2013: Noise Control for Quality of Life; vol. 5).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

honeycomb cores
acoustic simulation
acoustic measurement
acoustics
transmission loss
2012
4 Citations (Scopus)

An approach for structural-acoustic optimization of ribbed panels using component mode synthesis

Shepherd, M. R. & Hambric, S. A., Dec 1 2012, ASME 2012 Noise Control and Acoustics Division Conference at InterNoise 2012, NCAD 2012. p. 221-226 6 p. (American Society of Mechanical Engineers, Noise Control and Acoustics Division (Publication) NCAD).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Acoustics
optimization
acoustics
synthesis
Acoustic variables control

An approach for structural-acoustic optimization of ribbed panels using component mode synthesis

Shepherd, M. R. & Hambric, S. A., 2012, 41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012. Vol. 8. p. 6189-6194 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

optimization
acoustics
synthesis
evaluation
design optimization
3 Citations (Scopus)
structural vibration
vibration
acoustics
thin plates
integers
5 Citations (Scopus)

Nonlinearity analysis of model-scale jet noise

Gee, K. L., Atchley, A. A., Falco, L. E. & Shepherd, M. R., May 1 2012, Nonlinear Acoustics: State-of-the-Art and Perspectives, ISNA 2012 - 19th International Symposium on Nonlinear Acoustics. 1 ed. p. 307-310 4 p. (AIP Conference Proceedings; vol. 1474, no. 1).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

jet aircraft noise
scale models
nonlinearity
noise propagation
supersonic nozzles
6 Citations (Scopus)
Damage detection
damage
Structural health monitoring
simulation
structural health monitoring
2011
12 Citations (Scopus)
sine waves
statistics
kurtosis
skewness
probability density functions

Experimental vibro-acoustic analysis of honeycomb sandwich panels connected by lap and sleeve joints

Hambric, S. A., Conlon, S. C., Fahnline, J. B., Campbell, R. L., Barnard, A. R. & Shepherd, M. R., Dec 1 2011, 40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011. p. 2897-2905 9 p. (40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011; vol. 4).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

lap joints
sleeves
acoustics
coefficients
modal response

Rating of the loudest college basketball arenas for ESPN magazine

Shepherd, M. R., Hambric, S. A., Evans, N. D., Domme, D. J., Christian, A. W., Cranage, B. P., Poulain, K., Orr, A. J., Barnard, A. R. & Gardner, M. D., Dec 1 2011, In : Proceedings of Meetings on Acoustics. 12, 015004.

Research output: Contribution to journalConference article

ranking
ratings
sound pressure
students
rooms
2010
22 Citations (Scopus)

Bicoherence analysis of model-scale jet noise

Gee, K. L., Atchley, A. A., Falco, L. E., Shepherd, M. R., Ukeiley, L. S., Jansen, B. J. & Seiner, J. M., Nov 1 2010, In : Journal of the Acoustical Society of America. 128, 5

Research output: Contribution to journalArticle

jet aircraft noise
scale models
propagation
directivity
radiators

Development of an airframe intensity based structural health monitoring system

Conlon, S. C., Shepherd, M. R., Hines, J. A., Barnard, A. R., Semperlotti, F., Romano, P. Q. & Smith, E., Nov 15 2010, In : Annual Forum Proceedings - AHS International. 4, p. 3007-3020 14 p.

Research output: Contribution to journalConference article

Airframes
Damage detection
Structural health monitoring
Sensors
Signal processing
6 Citations (Scopus)

Development of an airframe intensity based structural health monitoring system

Conlon, S. C., Shepherd, M. R., Hines, J. A., Barnard, A. R., Semperlotti, F., Romano, P. Q. & Smith, E., Dec 1 2010, In : Annual Forum Proceedings - AHS International. 1, p. 873-886 14 p.

Research output: Contribution to journalConference article

Airframes
Damage detection
Structural health monitoring
Sensors
Signal processing
3 Citations (Scopus)

Effects of gears, bearings, and housings on gearbox transmission shafting resonances

Hambric, S. A., Shepherd, M. R. & Campbell, R. L., Dec 1 2010, ASME 2010 International Mechanical Engineering Congress and Exposition, IMECE 2010. Vol. 13. p. 229-238 10 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Bearings (structural)
Gears
Acoustic noise
Spur gears
Vibrations (mechanical)
1 Citation (Scopus)

Numerical characterization of the background noise generated by the ARL/Penn state Garfield Thomas water tunnel impeller

Jonson, M. L., Shepherd, M. R., Myer, E. C., Hambric, S. A. & DeRoche, R. J., 2010, Proceedings of the ASME International Mechanical Engineering Congress and Exposition 2009, IMECE 2009. American Society of Mechanical Engineers (ASME), Vol. 15. p. 43-50 8 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wind tunnels
Tunnels
Water
Acoustics
Turbomachinery
2009
5 Citations (Scopus)

Measurements of the power flow between bolted honeycomb sandwich panels

Hambric, S. A., Conlon, S. C., Grisso, B. G. & Shepherd, M. R., 2009, 38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009. Vol. 2. p. 1201-1209 9 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

shakers
honeycomb cores
lap joints
hammers
accelerometers

Minimizing the sound radiated by a cylindrical shell

Shepherd, M. R. & Hambric, S. A., 2009, 38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009. Vol. 7. p. 4387-4394 8 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

cylindrical shells
acoustics
bulkheads
harmonic excitation
computer programs

On the possible role of short-range shock formation and coalescence in jet aeroacoustic source characterization

Shepherd, M. R. & Gee, K. L., Dec 1 2009, 38th International Congress and Exposition on Noise Control Engineering 2009, INTER-NOISE 2009. Vol. 2. p. 875-881 7 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

jet aircraft noise
aeroacoustics
rockets
coalescing
shock
6 Citations (Scopus)

Short-range shock formation and coalescence in numerical simulation of broadband noise propagation

Shepherd, M. R., Gee, K. L. & Wochner, M. S., Dec 29 2009, In : Journal of the Acoustical Society of America. 126, 6, p. 2886-2893 8 p.

Research output: Contribution to journalArticle

noise propagation
coalescing
jet aircraft noise
shock
broadband
2007
9 Citations (Scopus)

Identification of nonlinear and near-field effects in jet noise using nonlinearity indicators

Gee, K. L., Shepherd, M. R., Falco, L. E., Atchley, A. A., Ukeiley, L. S., Jansen, B. J. & Seiner, J. M., Dec 1 2007, 13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Mach number
Acoustics
Power spectral density
Acoustic noise
Spectrum analysis