Experimental Test and Analysis ofthe Launch Impact Response of a Single Stage Light Gas Gun
In order to obtain the time-varying law of the impact response distribution characteristics of the single stage light gas gun,the internal ballistic equation of the single stage light gas gun was con-structed based on the dynamic and high pressure theory,and a single stage light gas gun with a projec-tile mass greater than 1kg and a launching caliber of 50mm was developed.The time-domain,frequen-cy domain and time-frequency characteristics of the impact response were analyzed by testing the launching response of projectiles with different muzzle velocities and masses.The analysis of experi-mental test results shows that the constructed internal ballistic equation can accurately describe the re-lationship between projectile mass,pressure and other parameters and the muzzle velocity.The spec-tral density distributed over four frequency bands:400～460 Hz,732～742 Hz,1015～1035 Hz and 1 083～1416 Hz.The amplitude of the impact response spectral line increases linearly with the projec-tile exit velocity,and the distribution width of the spectral area narrows linearly.The projectile exit ve-locity has a more significant effect on the high-frequency time-varying concentration characteristics of spectral energy density distribution.It provides the most basic response spectral lines for the design and impact evaluation of pneumatic launch in related field applications.
single stage light gas guninternal ballisticimpact responsetime frequency analysisshort time Fourier transform
万方数据
维普
