论文信息 - On the optimal nose geometry for a rigid penetrator

On the optimal nose geometry for a rigid penetrator

Abstract A variational formulation for the net force on the nose of a rigid projectile normally penetrating a compliant target is given. Frictional effects are negligible in this formulation. The variational problem is solved and the result compared to several popular nose geometries. For blunt tipped projectiles, the optimal geometry can significantly enhance penetration by reducing the net force of resistance. For long penetrator noses, the effect has much less value. The most interesting conclusion is that all the optimal geometries have blunt tips.

[1] B. S. Altman,et al. An empirical equation for penetration depth of ogive-nose projectiles into concrete targets , 1994 .

[2] W. Johnson,et al. Benjamin Robins (18th century founder of scientific ballistics): some European dimensions and past and future perceptions , 1992 .

[3] Charles Fox,et al. An introduction to the calculus of variations , 1950 .

[4] Michael J. Forrestal,et al. Penetration into dry porous rock , 1986 .

[5] D. B. Longcope,et al. Penetration into ductile metal targets with rigid spherical-nose rods , 1995 .

[6] M. J. Forrestal,et al. Penetration into semi-infinite reinforced-concrete targets with spherical and ogival nose projectiles , 1987 .

[7] C. Lanczos. The variational principles of mechanics , 1949 .

[8] M. J. Forrestal,et al. Penetration into soil targets , 1992 .

[9] M. J. Forrestal,et al. Penetration of Strain-Hardening Targets With Rigid Spherical-Nose Rods , 1991 .

[10] S. Jones,et al. Variational methods in nonconservative phenomena , 1989 .

[11] R. Batra,et al. Effect of frictional force and nose shape on axisymmetric deformations of a thick thermoviscoplastic target , 1994 .

[12] Romesh C. Batra,et al. Steady state penetration of thermoviscoplastic targets , 1988 .