Apparatus for vibration testing

Details Apparatus for vibration testing Apparatus for vibration testing

1986-05-05

1987-12-29

Chapman, John

Measuring and testing

Vibration

Vibrator

73668, G01M 700

Patent

active

047152290

ABSTRACT:
An electro-mechanical shaker apparatus utilizing a novel design is disclosed. The shaker apparatus includes an armature frame which is directly coupled to an armature coil to form an integrated unit. The shortened height of the unit effectively raises telescoping resonant frequencies above the spectrum of test frequencies. The armature frame is comprised of a top plate, bottom plate, and an intermediate section to form a laminated/honey-combed design. The top and bottom plates have a higher modulus of elasticity, while the intermediate section has a lower mass density, which effectively raises bending resonant frequencies above the spectrum test frequencies.

REFERENCES:
patent: 3044292 (1962-07-01), Matthews
patent: 3062041 (1962-11-01), Spodnewski
patent: 3262308 (1966-07-01), Schloss
patent: 3369393 (1968-02-01), Farmer
patent: 3536942 (1970-10-01), Zamparo
patent: 3686927 (1972-08-01), Scharton
patent: 4633716 (1987-01-01), Martin

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