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首页> 外文学位 >A Non-Explosive Methodology for Generating Wide Area Close-in Dynamic Blast Pressure Loads on Flexible Armor Panels.
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A Non-Explosive Methodology for Generating Wide Area Close-in Dynamic Blast Pressure Loads on Flexible Armor Panels.

机译：一种用于在柔性装甲板上生成广域近距离动态爆炸压力载荷的非爆炸方法。

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摘要

Dynamic blast testing of armor components often requires explosives to generate the high pressure, wide area impulses. While explosives provide the most realistic loading conditions, they are difficult to replicate consistently and necessitate remote test facilities for safety. Non-explosive methodologies, such as gas guns and shock tubes, can produce high impulse dynamic events with higher repeatability and increased safety, but are often limited to smaller-sized targets. To impact wide area flexible armor panels with the blast characteristics of a close-in detonation, a non-explosive methodology was investigated using the U.C. San Diego Blast Simulator. The objective was to create a consistent, economical, and scalable methodology for comparing conventional steel and prototype sandwich panel performance with validation of damage modes and extent of damage using actual blast tests and finite element modeling.;A tiled projectile array having spatially and temporally varying pressure pulses was developed to replicate the spherical loading profile of a close-in detonation. Using a high speed servo-hydraulic actuator, the projectile was launched at 23.0 -- 24.6 m/s, equivalent to 7,520 -- 8,460 Pa-s with less than 1.9% standard deviation over 43 tests. This was comparable to 1.37 kg of C4 at 305 mm standoff, which was also used to test five armor panels. Sandwich panel transmitted pressures, measured indirectly via transmission plate acceleration, showed up to 75% reduction in maximum values compared to the steel armor panels, with up to 49% weight savings. Deformation profiles of the non-explosive tested panels were similar in both shape and magnitude compared to the blast tested panels, but with more consistency and symmetry. Blast tested panels showed more extensive core crushing for the sandwich panels but no difference for steel.;Finite element modeling predicted similar deformation profiles and transmission plate velocities and accelerations. The models showed higher core crush for the blast tested panels and stress concentrations that matched both sets of test results. The applied impulses for the non-explosive tests were also predicted to be higher than the blast tests.;The UCSD Blast Simulator was able to achieve similar levels of damage compared to an actual blast test, with greater repeatability between tests.
机译：装甲部件的动态爆炸测试通常需要爆炸物以产生高压，大面积脉冲。尽管爆炸物提供了最现实的装载条件，但它们难以始终如一地复制并且需要远程测试设施以确保安全。诸如气枪和冲击管之类的非爆炸方法可以产生高脉冲动态事件，并具有更高的可重复性和更高的安全性，但通常仅限于较小的目标。为了以近距离爆炸的爆炸特性冲击广域柔性装甲板，使用U.C研究了一种非爆炸方法。圣地亚哥爆炸模拟器。目的是创建一种一致，经济，可扩展的方法，以比较常规钢和原型夹芯板的性能，并通过实际爆炸测试和有限元建模来验证损伤模式和损伤程度。;具有时空变化的平铺抛射物阵列开发了压力脉冲来复制近距离爆轰的球形载荷曲线。使用高速伺服液压执行器，以23.0-24.6 m / s的速度发射弹丸，相当于7,520-8,460 Pa-s，在43次测试中标准偏差小于1.9％。这相当于在305毫米支座处的1.37千克C4，也用于测试五块装甲板。夹层板传递的压力，通过传递板的加速度间接测量，与钢制铠装板相比，最大值降低了75％，重量减轻了49％。与爆炸测试面板相比，非爆炸测试面板的变形轮廓在形状和大小上都相似，但具有更大的一致性和对称性。爆破测试的面板显示出夹心板的更广泛的芯部破碎，而钢的则没有差异。有限元建模预测了相似的变形曲线以及传动板的速度和加速度。这些模型显示，经过爆炸测试的面板的岩心破碎率更高，且应力集中与两组测试结果均相符。预计非爆炸性测试中施加的脉冲也要比爆炸性测试高。UCSD爆炸模拟器与实际爆炸性测试相比，能够达到相似的破坏水平，并且测试之间的可重复性更高。

著录项

  • 作者

    Whisler, Daniel A.;

  • 作者单位

    University of California, San Diego.;

  • 授予单位 University of California, San Diego.;
  • 学科 Engineering Civil.
  • 学位 Ph.D.
  • 年度 2014
  • 页码 394 p.
  • 总页数 394
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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