Experimental Research on the Impact of Flying Object on Prestressed Reinforced Concrete Target Plates

doi:10.12382/bgxb.2024.0858

Abstract

Abstract:

Based on the application research background of large aircraft impact,the experimental research is conducted on the impact of flying object on a prestressed reinforced concrete target plate.The scaled samples equivalent to flying object and prestressed reinforced concrete target plates are designed using a geometric scaling ratio of 1:6.Finite element analysis software is used to construct the collision models and calculate the impact damage effects of two scaled samples with different structures on the target plate at different speeds.A physical loading test is conducted using an air cannon,and the critical penetration velocity of two scaled samples on 200mm thick prestressed reinforced concrete is obtained by comparing the test results with simulated results.This provides basic data for intuitive prediction/evaluation of the impact response and failure mode of prestressed reinforced concrete containment in nuclear power plants,and also provides design references and basis for prototype collision test schemes.

Key words: reinforced concrete target plate, flying object, penetration impact, pre-stress, damage effect

DONG Jun, JIANG Di, SUN Liang, SONG Mengyan, CHEN Fei, LIU Mengsha, REN Yike. Experimental Research on the Impact of Flying Object on Prestressed Reinforced Concrete Target Plates[J]. Acta Armamentarii, 2024, 45(S2): 176-185.

Figures/Tables 24

Fig.1 Flat headed solid cylindrical flying object

Fig.2 Flat headed hollow cylinder flying object

Table 1 Preparation requirements for ordinary C50 concrete

混凝土轴心抗压强度标准值/ (N·mm^-2)	粗骨料最大粒径/mm	级配要求	水泥品种	最大水胶比	最小胶凝材料用量/ (kg·m^-3)
32.4(混规)	15	连续级配	普通硅酸盐水泥	0.45	320

Fig.3 Prediction of penetration ability of simulated flying object

Fig.4 Schematic diagram of prestressed steel strand layout in target plate

Fig.5 Flying object model

Fig.6 Prestressed reinforced concrete target plate model

Fig.7 Penetration depth of flying object impacting on the target plate at 135m/s

Fig.8 The residual velocity of flying object after penetrating the target plate at 167 m/s

Fig.9 The residual velocity of flying object after penetrating the target plate at 195m/s

Fig.10 The residual velocity of flying object after penetrating the target plate at 244m/s

Fig.11 Penetration depth of flying object impacting on the target plate at 136m/s

Fig.12 The residual velocity of flying object after penetrating the target plate at 192m/s

Fig.13 The residual velocity of flying object after penetrating the target plate at 229m/s

Fig.14 Assembly design diagram of sabot and flying object

Fig.15 Physical assembly of sabot and flying object

Table 2 Test items and their testing methods

测试项目	测试内容	目的	测试方法
撞靶速度	飞射物撞靶速度	测试飞射物是否按规定速度撞靶	激光测速法
出靶速度	飞射物出靶速度	测试飞射物的出靶速度	加固靶网测试法
撞靶姿态	飞射物撞靶姿态	分析飞射物是否按规定姿态着靶	高速摄像系统
飞射物变形情况	飞射物的变形	分析飞射物撞靶后的变形损伤情况	试验后人工观察和测量
靶板毁伤效果	靶板毁伤参数	分析靶板的破坏模式、毁伤区域及裂纹尺寸	试验后人工观察和测量

Fig.16 Laser speed measurement system

Fig.17 Shape of target plate

Fig.18 Target network setting in the test site

Fig.19 Schematic diagram of impacting attitude test of flying object

Fig.20 Angle of attack calculation model

Fig.21 Morphology of the front(left)and back (right)of the target plate impacted by solid flying object

Fig.22 Morphology of the front(left)and back (right)of the target plate impacted by projectile with cavity

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