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Resistant performance of perforation in protective structures using a semi-empirical method with marine applications

机译:在海洋应用中使用半经验方法在防护结构中穿孔的抗性

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摘要

To predict the performance of protective structures, in a preliminary design for weapons effects analysis processes considering the ship vulnerability evaluation, it is important to choose a method which is simple, quick and feasible. This paper presents a semi-empirical method to study the resistant performance of perforation in protective structures for fragment effects, such as residual velocity after penetration of structures between source of explosion and the target. In the calculation procedure, the mass distribution of fragments is obtained by expressing Mott's equation, the initial and striking velocities are calculated using Gurney's formulas and the residual velocity is estimated using Baker et al.'s equation. Using experimental results from the literature, Woodward's test data (1978) and Edwards and Mathewson's experimental data (1997) are employed to verify the ballistic limit velocity, and Rupert et al's test data (1997), Sorensen et al's test data (1999) and Yarin et al's test data (2000) are adopted to check the residual velocity. An example of a 500-ton patrol-boat's hull and bulkhead is also discussed. The results of the verification are good in terms of agreement, and impact velocities of this study varies from 1500m/s to 2000m/s, the ratio of L/D ranges from 6 to 10 and the ratio (h/D) varies from 2.0 to 11.0, may serve as a useful reference for designers.
机译:为了预测防护结构的性能,在考虑舰船脆弱性评估的武器效果分析过程的初步设计中,选择一种简单,快速和可行的方法非常重要。本文提出了一种半经验方法来研究保护结构中穿孔的抗碎片性能,例如爆炸源和目标之间的结构穿透后的残余速度。在计算过程中,通过表达莫特方程获得碎片的质量分布,使用格尼公式计算初始速度和打击速度,并使用贝克等人的方程估算残余速度。根据文献的实验结果,伍德沃德的试验数据(1978年)和爱德华兹和马修森的试验数据(1997年)用于验证弹道极限速度,鲁珀特等人的试验数据(1997年),索伦森等人的试验数据(1999年)和Yarin等人的测试数据(2000年)用于检查残余速度。还讨论了一个500吨巡逻艇的船体和舱壁的例子。验证的结果在一致性方面是良好的,并且该研究的撞击速度从1500m / s到2000m / s不等,L / D的比值从6到10不等,h / D的比值从2.0不等。到11.0,可以为设计人员提供有用的参考。

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