Liu Yuan 1, PI Aiguo 1, Yang He 2, Feng Jikui 1, Huang Fenglei 1
1. State Key Laboratory of Explosion Science and technology, Beijing University of technology, Beijing 100081
2. Institute of electronic engineering, China Academy of Engineering Physics, Mianyang, Sichuan 621999
The survivability and reliability assessment of the missile borne components / key components of the high-speed penetration projectile is a hot and difficult problem in the field of fuze system development. Due to the cost limitation of the prototype test, it is feasible to carry out the research on the unequal proportion of the fuze components carried by the scaled projectile. In view of the fact that the traditional equal scale penetration scheme can not meet the requirements of rigid body overload similarity, the penetration / penetration similarity law of unequal scale penetration is studied, and the test design method of unequal scale penetration is proposed. The numerical results show that under the condition of penetrating the semi infinite thick concrete target, the pulse width and amplitude of the overload of the non proportionally scaled projectile rigid body can achieve the same loading conditions as the overload of the prototype projectile rigid body; under the condition of penetrating the multi-layer thin target, the non proportionally scaled projectile rigid body structure can be designed reasonably by adjusting the target plate arrangement and the initial velocity of the projectile Overload peak and pulse width coverage prototype test. The overload characteristics of rigid body obtained from the scaled model test can provide a reliable reference for the anti overload protection design of projectile and fuze components.
Key words: non proportional scaling, penetration / penetration, rigid body overload, missile borne fuse, numerical calculation
Cited in this paper: Liu Yuan, PI Aiguo, Yang He, Feng Jikui, Huang Fenglei. Study on the similarity law of non proportional penetration / penetration [J]. Explosion and impact, 2020, 40 (3): 033302. Doi: 10.11883/bzycj-2019-0086
Fig. 3 the corresponding relationship between the reduction coefficient λ D of elastic diameter and the reduction coefficient λ B of elastic length and the reduction coefficient λ e of cavity length
Figure 6 penetration depth of prototype test and shrapnel test
Fig. 9 Comparison of finite element models of 1000 kg prototype and reduced scale projectiles
"Explosion and impact" is online in Taobao store and wechat store. You can scan the code to buy the past and the present