Howard A. Gaberson (1931-2013) was a shock and vibration specialist with more than 45 years of dynamics experience. He was with the U.S. Navy Civil Engineering Laboratory and later the Facilities Engineering Service Center from 1968 to 2000, mostly conducting dynamics research.
Gaberson specialized in shock and vibration signal analysis and has published more than 100 papers and articles.
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Gaberson, Shock Severity Estimation: 1201gabe.pdf
Gaberson, Pseudo Velocity Shock Spectrum Rules For Analysis Of Mechanical Shock: pvsrs_rules.pdf
Gaberson and Chalmers, Modal Velocity as a Criterion of Shock Severity, Shock and Vibration Bulletin, Naval Research Lab, December 1969: modal_velocity.pdf
Gaberson & Eubanks, “Simplified Shock Design for Installation of Equipment,” Technical Note N-1622, Naval Civil Engineering Laboratory, Port Hueneme, CA, 1982: a114331.pdf
Gaberson & Chapler, Shock Spectrum Classification of Violent Environments that Cause Machinery Failure: SRS_violent.pdf
Gaberson, Use of Damping in Pseudo Velocity Shock Analysis: SRS_damping_PV.pdf
Gaberson, Conditions Under Which Displacement, Velocity, or Acceleration, Should Be Used for Diagnostic Monitoring: SRS_DVA_M.pdf
Gaberson, Half Sine Shock Tests to Assure Machinery Survival in Explosive Environments: HSS_test.pdf
Gaberson, Pseudo Velocity Shock Analysis, Shock Severity Estimation: Gaberson12Conc110729.pdf
Gaberson, Simple Shocks have Similar Shock Spectra when Plotted as PVSS on 4CP: GabersonP2U-117Simple.pdf
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Gaberson, Pseudo Velocity Shock Analysis, Velocity Shock Spectrum and Analyses Comparison: Gaberson6VelSESC110729.pdf
This reference includes images of Gaberson’s famous blower shock test. Note that LW12 is the only blower which survived. Gaberson concluded that a pseudo velocity of 150 in/sec was the failure threshold for the blowers.
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Here is a collection of Dr. Gaberson’s Matlab scripts for shock analysis: Gaberson_matlab_scripts.zip
These scripts are posted with Dr. Gaberson’s permission.
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Dr. Gaberson has also applied his skills to ornithology.
He observed that birds have either an instinctive or learned understanding of the importance of shock velocity as they extract food from shells.
Seagulls drop clam 10 ft onto asphalt v=sqrt(2*G*h)=304 ips
Crow drops walnut 18 ft onto asphalt v=sqrt(2*G*h)=408 ips
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See also:
Shock and Vibration Severity Thresholds for Structures and Equipment
– Tom Irvine
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