Low and High Frequency Aircraft Gunfire Vibration: Prediction and Laboratory Simulation
Abstract
This study describes in-house efforts with two primary objectives: (1) Generation of a gunfire-induced vibration prediction model that defines the equipment vibration spectrum in terms of four low frequency sinusoidals superimposed on a high freuqency random vibration field; and (2) Synthesis of an economic laboratory test method by which the spectral characteristics of the prediction model are simulated. In the process, a flexible prediction function is introduced to the technology as a promising vehicle through which more accurate and realistic vibration fields might be predicted and portrayed in the future. A gunblast power model is invoked, from previous work, that relates vibration magnitude and spectral character of the aircraft structural response to the gun power parameters and the distance separating the equipment from the gun muzzles. The test method development necessitated modification of existing commercial vibration equipment resulting in general improvement of the vibration system, as a whole. The prediction technique and test method, developed in this program, is being integrated into MIL-STD-810C and will appear as Method 519.2
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1975
- Accession Number
- ADA023619
Entities
People
- Elbert E. Ruddell
- Robert W. Sevy
Organizations
- Flight Dynamics Laboratory