超高速撞击过程产生的电磁脉冲对测试信号的干扰

doi: 10.11857/j.issn.1674-5124.2018.10.011生物厕所

黄家蓉，王晓峰，吴飚，孔德锋

(军事科学院国防工程研究院，河南洛阳 471023)

居家地毯

摘　要: 超高速撞击过程的毁伤破坏机理研究对评估动能武器撞击毁伤能力及碰撞破坏程度等具有重要理论意义。为探索超高速撞击条件下靶内应力波测量方法，在层状结构的花岗岩靶内布置PVDF 薄膜传感器测量撞击过程中应力波传播。试验结果表明：当弹速小于2 500 m/s 时，PVDF 薄膜可有效获得应力波信号，弹速接近3 000 m/s 时，撞靶过程产生的电磁脉冲会对PVDF 传感器产生干扰，无法获得有效信号。电磁脉冲的幅值大小与弹体材料无关，与弹速有关，速度越高，干扰越严重。弹速大于3 000 m/s 撞击靶标时，测点布置距撞击表面应大于500 mm ，速度越高测点距碰撞点的距离应越大，近距离处的应力波可根据远处有效信号通过数值仿真计算获取。

关键词: 超高速撞击; PVDF 薄膜; 靶内应力波测量; 电磁脉冲; 花岗岩

中图分类号：TJ06 文献标志码: A 文章编号: 1674–5124(2018)10–0067–06

Electromagnetic pulse interference to measure signal in hypervelocity impact

服务评价器HUANG Jiarong, WANG Xiaofeng, WU Biao, KONG Defeng

(Research Institute for National Defense Engineering of Academy of Military

Science PLA china, Luoyang 471023, China)

单眼3dAbstract : The mechanism study of hypervelocity impact is essential for evaluating damage ability of kinetic energy weapon and breakage level of target. In order to measure the stress wave propagation in targets with hypervelocity impact, PVDF thin films were put between schistose granite targets. The test results show that the PVDF thin film can gather effective stress wave signal when the bullet’s speed is lower than 2 500 m/s, and that the electromagnetic pulse in the process of impact will jam the PVDF thin film when the bullet’s speed is around 3 000 m/s. The jamming magnitude of electromagnetic pulse seems to be irrelevant with the material of bullet, but relevant with the speed. Bigger speed seems mean bigger jamming magnitude. When the bullet’s speed is bigger than 3 000 m/s, the distance between measurement points and impact face should be larger than 500 mm, and this distance should increase along with the bullet’s speed. Those stress waves at short range can be calculated by mathematical simulation.

道闸广告机

Keywords : hypervelocity impact; PVDF thin film; stress wave in target; electromagnetic pulse; granite

0 引　言

以岩石等地质类材料为自然防护层、以钢筋混

凝土为结构层是防护工程的主要建筑形式。为打击深埋坚固的地下防护工程，军事强国已将天基超高收稿日期: 2018-05-21；收到修改稿日期: 2018-07-29

作者简介: 黄家蓉（1965-），女，四川成都市人，高级工程师，硕士，主要从事量测技术研究及应用。第 44 卷第 10 期

中国测试Vol.44 No.102018 年 10 月CHINA MEASUREMENT & TEST October, 2018人工鱼礁

本文发布于:2024-09-23 17:19:46，感谢您对本站的认可！

本文链接：https://www.17tex.com/tex/3/154680.html

上一篇：各种血细胞模式图

下一篇：2021-2022学年湖北省夷陵中学、襄阳四中、随州一中高一3月联考生物试题