Methods for Reducing Vibrations of Equipment Mounted on Helicopter External Stores Stations.

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Abstract:

Three designs for reducing the vertical oscillations induced in equipment mounted on the wings of AH-1G helicopters are submitted. A design for a variable stiffness spring to accommodate a change in the mass of the system to be isolated is presented. By use of an analog simulation of a dynamic absorber it is shown that a dynamic absorber is not satisfactory for small ratios of damper mass to system mass. An experimental program is formulated to determine the dynamic properties of a test fixture to be used in determining isolator effectiveness. Author

Author(s):
Oliver, James M.
Author Organization(s):
ARMY MISSILE COMMAND REDSTONE ARSENAL ALA GROUND EQUIPMENT AND MATERIALS DIRECTORATE
Descriptive Note:
Technical rept.,
Pagination:
0057

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
RL-TR-73-6
Project Number(s):
DA-1-M-262303-A-214
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*ROCKET LAUNCHERS, *HELICOPTERS, VIBRATION, EXTERNAL STORES, DAMPING, VIBRATION ISOLATORS, OSCILLATION, MATHEMATICAL MODELS, TEST EQUIPMENT
Field(s)/Group(s):
Helicopters, Rockets
Keyword(s):
H 1 AIRCRAFT, AH 1G AIRCRAFT, HUEY COBRA, ANALOG SIMULATION, COMPUTER AIDED DESIGN
Report Date:
1973 Aug 06