Accession Number : AD0780219

Title :   Natural Frequencies of Bonded and Unbonded Propellants in Three and Five-Inch Rocket Motors.

Descriptive Note : Interim rept. Apr-Jun 73,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s) : Ball,Robert E.

Report Date : 16 MAY 1974

Pagination or Media Count : 27

Abstract : The results of an analysis by Armenakas for the natural frequencies of composite (two material) cylinders is used to determine the lowest natural frequency of bonded and unbonded propellants in three-inch and five-inch rocket motors. The lowest frequency is found to be approximately eight times larger than the lowest frequency in the launch force pulse. Thus, the dynamic effects in the propellant will be significant. (Author)

Descriptors :   *Solid rocket propellants, *Dynamic response, Gun launchers, Resonant frequency, Rockets, Rocket engine cases, Bonding, Computer programs

Subject Categories : Rockets
      Solid Rocket Propellants

Distribution Statement : APPROVED FOR PUBLIC RELEASE