Study Of Airport Unexploded Ordnance Clearance Warhead Technology

Clearance of Unexploded Ordnance under the runway is the key point to guaranteecombat aircrafts taking off in time. Cleaning the unexploded ordnance fast and safely directlyaffects the striving for air supremacy, and also it is the key to achieve the victory of warfare.An assumption of broken, broken tandem warhead is proposed to exclude unexplodedordnance two meters below the airport runway. The current situation of ammunition disposaltechnology and airport unexploded ordnance removal method was introduced firstly, and thenthe shock initiation mechanism and criterion were described. Through the comparison of twokinds of broken, broken tandem warhead scheme, the reverse priming tandem warhead wasdetermined as the EOD warhead scheme of airport. The effect of forward and backwardparameters of tandem shaped charge warhead were analyzed by theoretical analysis andnumerical simulations, and simulations of penetrating airport runway target model werecarried out as well.The effect of structural parameters for the rod-like jet forming performance of K chargewas analyzed by means of numerical simulation, and the change laws of velocity, length,kinetic energy and total charge of the projectile were obtained. The forming mechanism ofcentral-hole shaped charge was analyzed, and the former high speed jet formed by the centralscreened pipe and the latter slow speed jet formed by the central-hole shaped charge make upthe projectile. The effects of central-hole shaped charge structural parameters for theprojectile were analyzed, and the change laws of head velocity, velocity gradient, length,kinetic energy of the projectile were obtained, and performance testing was carried out bypenetrating plate. The results shows that：（1）while length 40 mm＜H＜60 mm, curvatureradius 300 mm＜R＜500 mm, thickness 3 mm<δ<5 mm, charge slenderness rate0.7＜λ＜ 0.9 ,the penetration capability of projectile is better. For K charge, appropriate detonationwave controller can be applied to the charge to enhance the speed, length-diameter ratio,energy of the projectile. The energy utilization rate of the projectile with detonation wavecontroller is promoted by 17.6％, the speed is 42.5％higher, the length is 2 times longer, andthe energy is 2.5 times enhanced. (2)The ratioτof center hole diameter and charge diameterhas a best range 0＜η＜7.5 while the coning angle of liner 90°＜α＜110°.The smaller of thecenter hole diameter，the better performance of the projectile withη＞7.5 and under therequest of forward charge. Meanwhile, the projectile has a better performance while chargeslenderness ratio 0.7＜λ＜0.9.The warhead designed in this paper can penetrate 10 mm armor plate two meters belowthe runway, and initiating an unexploded COMP.B insensitive explosive warhead. The resultsof the research can provide a reference for the study of airport unexploded ordnance removaltechnology.