球体低速斜撞击成坑规律试验研究
Experimental study on scaling laws of sphere by low-speed oblique impact cratering
戴立夫 1凌道盛 2郑建靖 2施昌宇3
作者信息
- 1. 浙江大学 建筑工程学院,浙江 杭州 310058;中交第二航务工程局有限公司 技术中心,湖北 武汉 430040
- 2. 浙江大学 建筑工程学院,浙江 杭州 310058;浙江大学 超重力研究中心,浙江 杭州 310058
- 3. 浙江大学 建筑工程学院,浙江 杭州 310058
- 折叠
摘要
通过设计球体发射低速撞击试验装置,系统开展不同角度条件下球体撞击干砂靶成坑试验,定量分析撞击速度、角度对撞击坑型的影响,定性分析球体低速斜撞击干砂靶的成坑过程及机理,修正低速斜撞击条件下的成坑相似律.讨论所修正的相似律在不同撞击条件下的适用性及其在天文学上的应用.试验结果表明,坑型随撞击速度的增加而增大;坑长、坑体积随撞击角度增加而增加,坑宽随撞击角度的增加先减小再增加,坑深随撞击角度的增加先增加后减小;成坑体积可由撞击角度、撞击速度、球体尺寸、球体密度、重力参数进行缩放得到;低速斜撞击成坑过程中动量和能量共同影响耗散冲击过程.
Abstract
By designing a low-speed impact test device for sphere launch,the cratering experiments of sphere impacting dry sand target at different angles were carried out systematically.The influence of impact speed and angle on crater shapes was quantitatively analyzed.The crating process and mechanism of low-speed oblique impact of spheres on dry sand target were analyzed qualitatively,and the scaling laws of cratering under low-speed oblique impact conditions were modified.The applicability of the scaling laws under different impact conditions and its application in astronomy were discussed.Experimental results verify that the crater shape increases with the increase of impact speed,and the crater length and volume increase with the increase of impact angle.The crater width first decreases and then increases with the increase of impact angle,while the crater depth first increases and then decreases with the increase of impact angle.The cavity volume was scaled by parameters such as impact angle,impact speed,sphere diameter,density of sphere and gravity.The dissipative impact process was influenced by both the momentum and energy in the low-speed oblique impact cratering.
关键词
成坑效应/低速斜撞击/量纲分析/相似律/试验研究Key words
cratering effect/low-speed oblique impact/dimensional analysis/scaling law/experimental study引用本文复制引用
基金项目
国家自然科学基金基础科学中心项目(51988101)
出版年
2024
NETL
NSTL
万方数据