Accession Number : ADA054598


Title :   Computer Program for Vibration Prediction of Fighter Aircraft Equipments


Descriptive Note : Final rept. 21 Mar 1976-15 Apr 1977


Corporate Author : AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OH


Personal Author(s) : Sevy, Robert W. ; Haller, Mark N.


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA054598


Report Date : NOV 1977


Pagination or Media Count : 218


Abstract : This study details in-house efforts that culminate in a computer program for the prediction of vibration inputs to equipments mounted in fighter aircraft. The computer format is orchestrated about a basic function whose thematic variations are invoked to describe boundary layer excitations and to synthesize a sequence of transfer functions whose operations, in turn, define the resultant vibration spectrum; beginning at the aircraft surface and proceeding inward to the designated equipment. Program inputs specify flight conditions, aircraft structural classes, equipment weight, equipment locational coordinates, and mounting categories in order to characterize vibration inputs of fighter aircraft equipments during flight attitudes ranging from straight and level states to a variety of significant flight maneuvers and phases. Program outputs, digital and graphical, are designed to provide the direct spectral information necessary to assemble sequential vibration histories corresponding to fighter aircraft mission profiles.


Descriptors :   *JET FIGHTERS , *COMPUTER PROGRAMS , *AIRCRAFT EQUIPMENT , *VIBRATION , VIBRATION ISOLATORS , TURBULENT BOUNDARY LAYER , MATHEMATICAL PREDICTION , STRUCTURAL RESPONSE , WEIGHT , AIRFRAMES , MOUNTS , FLIGHT MANEUVERS , SKIN(STRUCTURAL) , DYNAMIC RESPONSE , MISSION PROFILES , TRANSFER FUNCTIONS , COMPUTER PRINTOUTS , POSITION(LOCATION)


Subject Categories : ATTACK AND FIGHTER AIRCRAFT
      COMPUTER PROGRAMMING AND SOFTWARE
      MECHANICS


Distribution Statement : APPROVED FOR PUBLIC RELEASE