Experimental study on the attenuation law of high-speed standard fragments velocity
In order to study the law of the movement of high-speed fragmentation in the air in accordance with NATO STANAG 4496,a fragmentation projectile launched by a 30 mm ballistic gun is designed,and the motion data of standard fragmentation in the speed range of 1 400～2 200 m/s is obtained by using a multi-group area interception speed measuring device.On this basis,the speed attenuation law of fragmentation in air is studied by numerical simulation and theoretical derivation,and the force of fragmentation in air movement is derived by CFX software to simulate the movement of fragments in air,and the maximum error between simulation and measured speed is 2.71%.Combined with the fragmentation motion equation,the velocity attenuation model is established,and the extreme value of the windward area during the fragmentation motion is derived,and the results show that the fragmentation attenuation coefficient k is 0.008 899,and the fragmentation air resistance coefficient cxis in the range of[0.993 04,1.617 21],and the velocity attenuation model is verified by experiments.
high-speed fragmentationlaw of attenuationtestSTANAG 4496air resistance
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