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CONSIDERATIONS IN THE DESIGN OF SHOCK AND VIBRATION TESTS
ISSN: 0148-7191, e-ISSN: 2688-3627
Published January 01, 1959 by SAE International in United States
Annotation ability available
Shock and vibration tests are usually established on the basis of the maximum intensities of shock and vibration that occur in the field and for locations at which an equipment to be tested may probably be used. It is shown that for equipment, that is not negligibly light compared with the foundation on which it is mounted, that such a procedure leads to overconservative and difficult-to-perform tests. This is caused by consistent less-than-maximum intensity of excitation which occurs at frequencies for which the equipment has large values of mechanical impedance. It is at these frequencies that damage to the equipment is most likely to occur. If tests were performed on machines such that the impedence of the mounting platform were as great as the field mounting foundation, then a more realistic and easier-to-perform test would result if no compensation were made in order to eliminate dips in the excitation spectra caused at frequencies of large equipment impedence. It is sugguested that such compensation be not generally used for such tests.
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CitationVIGNESS, I., "CONSIDERATIONS IN THE DESIGN OF SHOCK AND VIBRATION TESTS," SAE Technical Paper 590359, 1959, https://doi.org/10.4271/590359.
- The Equivalent Static Accelerations of Shock Motions, Walsh and BlakeR. E., Proc. Soc. Exp. Stress Anal. Vol. 6, No. 2, page 150, 1948.
- Data Reduction Techniques for Flight Vibration Measurements, KennardD. C. and ThomasC. E. WADC Tech Note #59-44, ASTIA Doc #AD-210478, Feb. 1959.
- Effect upon Shock Spectra of the Dynamic Reaction of Structures, O'HaraGeorge J., U. S. Naval Research Lab. Report #5236 of Dec. 16, 1958. Presented for Publication in Proc. Soc. Exp. Stress Analysis.
- Damage Potential of Shock and Vibration, BlakeR. E., BelsheimR. O., and WalshJ. P.page 147of “Shock and Vibration Instrumentation”published by ASME June 1956.
- Mathematical Methods in Engineering, vonKarman and Biot, McGraw Hill Book Co. Inc. 1940, see pp 196-204.
- Some Shock Spectra Characteristics and Uses, FungY. C. BartonM. V., Jour. of Appl. Mech.Vol. 25, pp. 365, (Sept. 1958).
- The Significance of Impedance in Shock and Vibration, BlakeR. E., BelsheimR. O., page 101of “Mechanical Impedance Methods”an ASME Publication edited by PlunkettR., 1958.