Parametric Resonance in Gun Tubes
Abstract
This work examines the likelihood of encountering parametric resonance in gun tubes. The resonance is induced conceptually by the periodic changes in transverse stiffness induced by (i) the axial vibrations resulting from a single application of ballistic pressure - 'single round parametric resonance'. (ii) the periodic applications of ballistic pressure such as encountered in an automatic weapon - 'multiple round parametric resonance'. Results show that ballistic cycles currently employed in the 60mm MCAAAC semi automatic cannon are not likely to excite single round resonance. Ununsually brief cycles, however, are shown to be capable of producing resonance amplifications of three orders of magnitude in less than twenty cycles of axial vibration. By proper design of the pressure cycles and/or the fundamental axial frequency of the tube, this type of resonance is rather easily avoided.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1977
- Accession Number
- ADA040677
Entities
People
- T. E. Simkins