The in-situ measurement of the penetration trajectory in reinforced concrete target by grid measurement method
In order to study the terminal ballistics of a high-speed penetrator striking in the steel reinforced concrete target, a grid measurement method was developed in the present paper.The equipment system is composed of the grid cables, LED lamps, power and high-speed photography, etc.The grid cables are pre-embedded as multilayer with given space and are arranged like the chess-board distribution along the steel rebar (Fig.1 and Fig.2).The basic measuring idea is, when the projectile penetrating into concrete target, it may cause the grid cable cut off, and thus the corresponding circuit is turn off.The winking of LED lamps corresponding to the multilayer grid cables are recorded continuously by high-speed photography.It displays the penetration trajectory of projectile and the dynamic response/destruction of concrete target in situ.The grid measurement method had been validated by the penetration experiment.With the help of LED lamps and high-speed photography, the penetration ballistics and the final depth of penetration were studied.Corresponding to each grid layer, the ballistic trace (Fig.4) could be determined according to the winking of LED lamps (Fig.4 and Fig.5), which represents the cross locations of longitudinal and transverse cables that pre-embedded in concrete target like a rectangular Cartesian coordinate.With the given space between layers and the high-speed photography record of the instant moment when the LED lamps winked, the variation of the projectile velocity and the final depth of penetration could be obtained(Fig.6).The DOP value given by the grid measurement method is also validated by the empirical formula and direct measurement, and it confirms the effectiveness of the grid method.
grid measurement method in-situ measurement penetration trajectory Steel Reinforced Concrete
Weifang Xu Xiaowei Chen Rong Zhang Huimin Li
Institute of Systems Engineering, China Academy of Engineering Physics, P.O.Box 919-416, Mianyang, Sichuan, China 621999
国际会议
北京
英文
40-41
2014-10-19（万方平台首次上网日期，不代表论文的发表时间）