Natural frequencies of bonded and unbonded propellants in three- and five-inch rocket motors

摘要

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