Measuring and testing – Vibration – By mechanical waves
Patent
1995-01-09
1997-03-11
Chapman, John E.
Measuring and testing
Vibration
By mechanical waves
G01N 330
Patent
active
056103360
ABSTRACT:
A new method for pre-construction determinations of the natural frequency of damped vibrations of foundations under machinery with known vertical impact loads which will be installed on a soil base, comprising steps for impacting the soil base with a weight to create natural vibrations of said soil base, measuring the vibration responses on soil base, recording the vibration responses, conducting spectrum analyses over the range of the soil base vibration records, and, determining the dominant natural frequency of said soil base from the preceding step, which frequency is an estimate of the natural frequency of vertical damped vibrations of the machine foundation.
REFERENCES:
patent: 3224253 (1965-12-01), McKay
patent: 3391571 (1968-07-01), Johanson
patent: 3946598 (1976-03-01), Towne et al.
patent: 4128011 (1978-12-01), Savage
patent: 4856318 (1989-08-01), Hogan et al.
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