MEASUREMENT AND ANALYSIS OF ACCELERATION ENVIRONMENTS GENERATED BY NRL ROUGH ROAD SIMULATOR
Abstract
The NRL Rough Road Simulator is a device for determining the resistance of military equipments to damage by the mechanical environments arising from ground transportation. Rough terrain is simulated by presenting a contoured surface moving at controlled speed to the wheels of a tethered vehicle which provides the appropriate mechanical interface between the terrain and the equipment under test. The output motions generated at the machine-equipment interface are of a quasi-random, vibratory nature, and consist of the rigid-body motions of the vehicle and its suspension system and the elastic motions of the vehicle's structure. A suitable instrumentation system has been assembled, and has provided a representative description of the output motions generated by the Rough Road Simulator and the influence of them of variations in some of the test conditions. The output motions studied were those produced with a Type M35 6 x 6 truck as the tethered vehicle. Acceleration waveforms were recorded at various points of the truck's cargo space for several equivalent truck speeds, and with dead-weight loads approximating its full rated capacity (5,000 lb), half of rated capacity, and without load. Data are presented in terms of power spectral densities and rms acceleration to permit comparison of the motions at the various locations and to indicate how the motions themselves and the relationships between them are altered by changes in equivalent truck speed and payload.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1970
- Accession Number
- AD0704468
Entities
People
- Edward W. Clements
Organizations
- United States Naval Research Laboratory