Research on engineering algorithm of projectile penetration depth based on initiation mode
The damage efficiency of the warhead varies with the penetration depth under the fuze setting.To ana-lyze the real penetration and explosion depth of the projectile under different initiation modes,the test of a large-caliber projectile penetrating into granite was carried out.Based on the verification of the test results,the numeri-cal model of rigid penetration of projectile into rock target was established.Based on the dimensional analysis of the penetration process,a simplified engineering algorithm of the penetration characteristic quantity was estab-lished.Combined with the parametric numerical simulations,the empirical relationship of the penetration charac-teristic quantity of the projectile in the range of 0.037～0.565 m diameter was fitted.The working principle of a single fuze of warhead was analyzed,and the engineering algorithm of penetration depth under three typical initia-tion modes was obtained.The results showed that the engineering algorithm has a good prediction effect on the time history law of penetration depth,and the prediction accuracy can be improved by 6.9%compared with the traditional cavity expansion theory method.It had certain accuracy in predicting the penetration depth of the pro-jectile under different initiation modes,which can provide a reference for the analysis of the real initiation depth of projectile penetrating granite.
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