A chaotic system for the generation of extreme mechanical environments
A proposed system and technique for generating high frequency, high amplitude vibration environments is presented. These environments are created using a device attached to a common vibration exciter that permits multiple metal on metal impacts driving a test surface. Previous analytical studies (Refs. 1 and 2) predicted that test environments with an energy content exceeding 10 kHx could be achieved using sinusoidal and random shaker excitations. The analysis predicted that chaotic vibrations yielding random-like test environments could be generated from sinusoidal inputs. In this study, a much simplified version of the proposed system was fabricated and tested in the laboratory. Experimental measurements demonstrate that even this simplified system, utilizing a single impacting object, can generate environments on the test surface with significant frequency content in excess of 80 kHz. A theoretical model of the system is described and the results are compared with the experimental results for the simplified system. 5 refs., 8 figs.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5168681
- Report Number(s):
- SAND-91-0491C; CONF-911241--3; ON: DE91018358
- Country of Publication:
- United States
- Language:
- English
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420200* -- Engineering-- Facilities
Equipment
& Techniques
ACCELERATION
DESIGN
DIFFERENTIAL EQUATIONS
EQUATIONS
FOURIER TRANSFORMATION
FREQUENCY RANGE
FREQUENCY RESPONSE TESTING
FUNCTIONS
IMPACT TESTS
INTEGRAL TRANSFORMATIONS
KHZ RANGE
KHZ RANGE 01-100
MATERIALS TESTING
MECHANICAL TESTS
MECHANICAL VIBRATIONS
SHOCK WAVES
SPECTRAL DENSITY
SPECTRAL FUNCTIONS
TESTING
TRANSFORMATIONS