Test machine for simulation of shock wave induced motion

Details Test machine for simulation of shock wave induced motion Test machine for simulation of shock wave induced motion

1999-05-27

2001-02-06

Fuller, Benjamin R. (Department: 2855)

Measuring and testing

Testing by impact or shock

C073S012070, C073S012080, C073S012090

Reexamination Certificate

active

06182495

ABSTRACT:

The present invention relates in general to testing the physical impact on equipment from expected shock wave induced disturbances.
BACKGROUND OF THE INVENTION
Various commercial “off the shelf” items are available on an economical basis for installation within environments subject to motion induced disturbance, such as equipment mounted on naval marine vessels including ships and submarines experiencing shock wave induced motions during sea travel. Such equipment, however, often lacks sufficient reliability following the impact imposed by the shock wave motions. It is therefore an important object of the present invention to provide economical test means through which typical shock wave induced motion may be simulated and applied to samples of such equipment in order to identify deficiencies therein that may be overcome by relatively minor hardware modification.
SUMMARY OF THE INVENTION
In accordance with the present invention, a test machine is provided having a table on which the sample equipment is mounted. Such table is vertically displaceable in opposite directions on a stand of the test machine b a pair of coil springs under axial compression. Compression of the upper coil spring is initially established by pulling the table down a prescribed distance from a neutral to an operational position. The table is then selectively released by unlatching to allow it to rebound between the upper and lower coil springs for several cycles producing a vertical sinusoidal motion dependent on various factors which are adjustable so as to simulate shock wave induced motions experienced by equipment on a wide variety of marine vessels during sea travel.


REFERENCES:
patent: 3693421 (1972-09-01), Karper et al.
patent: 4513402 (1985-04-01), Devaure

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