Influence of serrated configuration on transverse overload of the projectile penetrating with a small attack angle

WANG Shuai; DENG Zhifang; HE Liling; CHEN Hongyong; LI Jicheng; YAN Yixia; CHEN Gang

doi:10.11883/bzycj-2024-0250

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WANG Shuai, DENG Zhifang, HE Liling, CHEN Hongyong, LI Jicheng, YAN Yixia, CHEN Gang. Influence of serrated configuration on transverse overload of the projectile penetrating with a small attack angle[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0250

Citation:

WANG Shuai, DENG Zhifang, HE Liling, CHEN Hongyong, LI Jicheng, YAN Yixia, CHEN Gang. Influence of serrated configuration on transverse overload of the projectile penetrating with a small attack angle[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0250

Citation:

WANG Shuai, DENG Zhifang, HE Liling, CHEN Hongyong, LI Jicheng, YAN Yixia, CHEN Gang. Influence of serrated configuration on transverse overload of the projectile penetrating with a small attack angle[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0250

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Influence of serrated configuration on transverse overload of the projectile penetrating with a small attack angle

doi: 10.11883/bzycj-2024-0250

WANG Shuai^{1, 2
,},
DENG Zhifang^{1, 2},
HE Liling^{1, 2
,
,},
CHEN Hongyong^{1, 2},
LI Jicheng^{1, 2},
YAN Yixia^{1, 2},
CHEN Gang^{1, 2}

1.
Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621999, Sichuan, China
2.
Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang 621999, Sichuan, China

Received Date: 2024-07-22
Rev Recd Date: 2024-11-28

Available Online: 2024-12-02

Abstract

Abstract

In the process of deep penetration of the earth penetration weapon (EPW) attacking the underground target, the non-ideal penetration attitude with an initial attack angle is inevitable, which will introduce transverse overload with a large peak value for the earth penetrator. It could damage some important components of the earth-penetrating projectile and reduce the penetration efficiency of the projectile. Therefore, it is necessary to study the methodology of reducing the transverse overload peak value of the earth-penetrating projectile. However, the previous research on the earth-penetrating projectile seldom considered the influence of transverse overload, making it difficult to effectively reduce the transverse overload. In order to overcome this problem, a numerical simulation method was used to study the special transverse overload shedding effect and its mechanism of a new type of earth-penetrating projectile with a serrated configuration penetrating concrete targets at non-zero attack angles. The influences of the initial attack angle and the coefficient of the center of mass of the projectile were studied, and the motion, contact force, contact moment, and contact area of the projectile were analyzed using a conventional smooth projectile for comparison. The results show that for small initial attack angles of 1°, 2° and 3°, the peak value of transverse overload of the serrated projectile is reduced by about 30.6%, 5.2%, and 11.3%, respectively, compared to the smooth projectile but the peak value of contact moment, pulse width, and deflection angle are increased. The research reveals the mechanical mechanism to reduce transverse overload: the serrated body of the projectile reduces the contact area between the projectile and the target, and the transverse contact force is mainly concentrated on the upper surface of the right serrated parts of the first two serrated grooves near the head of the projectile; the transverse contact force between the serrated body and the target decreases, while the transverse contact force between the non-serrated parts (mainly the head of the projectile) and the target increases. Therefore, these two parts of the projectile compete and control the reduction effects of the transverse overload of the whole projectile in the process of deep penetration with an initial attack angle. When optimizations of structural design are used to suppress the ballistic deflection of the serrated projectile, the transverse overload shedding efficiency of serrated projectiles can be effectively improved.
- transverse overload shedding,
- attack angle,
- serrated projectile,
- deflection of trajectory

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References(29)

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