Influence rule of impact attitude on trajectory characteristics of warhead’s non-normally penetration into multi-layer spaced steel target

YANG Pu; LI Jicheng; CHEN Jianliang; ZHANG Bin; HE Liling; CHEN Gang

doi:10.11883/bzycj-2022-0571

Volume 43 Issue 9

Sep. 2023

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Article Navigation > Explosion And Shock Waves > 2023 > 43(9): 091407

YANG Pu, LI Jicheng, CHEN Jianliang, ZHANG Bin, HE Liling, CHEN Gang. Influence rule of impact attitude on trajectory characteristics of warhead’s non-normally penetration into multi-layer spaced steel target[J]. Explosion And Shock Waves, 2023, 43(9): 091407. doi: 10.11883/bzycj-2022-0571

Citation:

YANG Pu, LI Jicheng, CHEN Jianliang, ZHANG Bin, HE Liling, CHEN Gang. Influence rule of impact attitude on trajectory characteristics of warhead’s non-normally penetration into multi-layer spaced steel target[J]. Explosion And Shock Waves, 2023, 43(9): 091407. doi: 10.11883/bzycj-2022-0571

Citation:

YANG Pu, LI Jicheng, CHEN Jianliang, ZHANG Bin, HE Liling, CHEN Gang. Influence rule of impact attitude on trajectory characteristics of warhead’s non-normally penetration into multi-layer spaced steel target[J]. Explosion And Shock Waves, 2023, 43(9): 091407. doi: 10.11883/bzycj-2022-0571

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Influence rule of impact attitude on trajectory characteristics of warhead’s non-normally penetration into multi-layer spaced steel target

doi: 10.11883/bzycj-2022-0571

YANG Pu^{1, 2
,},
LI Jicheng^{1, 2
,
,},
CHEN Jianliang^{1, 2},
ZHANG Bin^{1, 2},
HE Liling^{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: 2022-12-29
Accepted Date: 2023-07-10
Rev Recd Date: 2023-05-30

Available Online: 2023-07-19

Publish Date: 2023-09-11

Abstract

Abstract

In order to deeply investigate the trajectory deflection characteristics of a warhead during the non-normal penetration into the multi-layer spaced target, the trajectories under different impact attitudes are analyzed with combined numerical simulation and theoretical analysis, in which finite element method (FEM) simulations on the penetration process under various impact conditions are conducted systemically, and the deformation and failure morphologies of warhead and target as well as the interaction characteristics between them are discussed in detail. Besides some feature parameters, lateral contact force and angular moment, are introduced in the theoretical analysis. Furthermore, the influence rules of oblique angle and attacking angle on the trajectory deflection characteristics are investigated in detail. Related results indicate that during the non-normal penetration into multi-layer spaced target, the warhead behaves as small staged axial velocity decay combined with obvious lateral trajectory deflection, and the trajectory deflection is mainly derived from the lateral contact force as well as the corresponding angular moment, and the lateral contact force mainly makes its effect during three periods, i.e., when the nose, shoulder and tail of warhead pass through the target, respectively. The oblique angle mainly affects the degree of external load asymmetry exerting on the warhead with increase of the oblique angle, the downward lateral contact force as well as the corresponding angular moment exerting on the warhead all increase, thus the trajectory deflection becomes more severe. Comparatively, the attacking angle determines two factors, one is the radial velocity of warhead at the time when its nose passes through the target, and another is the contact position between the warhead and target when the warhead tail passes through the target. These two factors determine the trajectory simultaneously, so different attacking angles make the lateral contact force and the corresponding angular moment differing from each other during the process of the warhead tail passing through the first target, leading to a critical attacking angle at which the evolution trend of trajectory deflection would turn the other way round. Compared to the penetration into a single layer target, a remarkable feature in the penetration of a warhead into the multi-layer spaced target is that the trajectory deflection shows a cumulative effect, and the situation in the penetration into the former target plate significantly affects the interaction condition between the warhead and the latter target plates, and this further results in a coupling effect between the trajectory deflection and the contact force. The present investigation is of good significance in the practical engineering application, e.g., predicting the penetrating ability of a warhead into the multi-layer spaced target, and optimizing the warhead structure and its impact attitude, etc.
- warhead,
- multi-layer spaced steel target,
- non-normal penetration,
- trajectory deflection,
- impact attitude

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References(35)

References

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