Shaker shock testing using nonstationary random transients
Shock testing plays a critical role in the development of a wide range of structures. Conducting controlled laboratory shock tests on these structures provides essential data on their ability to survive their operational shock environments. Laboratory test specifications establish equivalence relationships between the actual shock environments and the laboratory shock test inputs. In recent years the electrodynamic shaker has proven itself to be a very versatile machine for applying transients to aerospace components. Shaker control techniques now exist which allow reproduction of shock transients composed of summed deterministic functions (e.g., decaying sinusoids). This paper reports the results of a study in which nonstationary random transients are used as the basis for defining shaker shocks. After describing the test specification and implementation procedures, the paper compares the results of some tests conducted on a simple cantilever beam structure. One test is a direct simulation of a nonstationary random process environment; two other tests represent the shock source using excitations established via the method of shock response spectra. The advantages and limitations of each approach are summarized. 11 refs., 9 figs., 2 tabs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6808414
- Report Number(s):
- SAND-88-1782C; CONF-881076-8; ON: DE88015847
- Resource Relation:
- Conference: 59. shock and vibration symposium, Albuquerque, NM, USA, 18 Oct 1988; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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