| 混凝土超高速侵彻效应的相似规律1) |
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| 引用本文： | 程怡豪, 李干, 岳松林, 张中威, 宋春明, 邱艳宇. 混凝土超高速侵彻效应的相似规律1)[J]. 力学与实践, 2019, 41(5): 543-549. doi: 10.6052/1000-0879-19-192 |
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| 作者姓名： | 程怡豪 李干 岳松林 张中威 宋春明 邱艳宇 |
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| 作者单位： | *陆军工程大学野战工程学院,南京210007; †陆军工程大学爆炸冲击防灾减灾国家重点实验室,南京210007; **南京理工大学机械工程学院,南京210094 |
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| 基金项目： | 1) 教育部长江学者和创新团队发展计划(IRT13071)、国家自然科学基金(51409258, 11602303, 11772355)、江苏省自然科学基金(BK20190570)和博士后基金(2017M621752, 2018M643853) 资助项目 |
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| 摘 要： | 为了研究混凝土超高速侵彻效应的相似规律,总结相似关系基本理论并开展1.4~3.9 km/s 的混凝土侵彻实验,综合本文实验和相关文献实验结果确定关键相似准数并得到归一化侵彻深度的变化规律。结果表明,归一化侵彻深度主要取决于Johnson 数、弹靶密度比和弹体长径比,弹靶强度比和弹头形状系数等因素影响不大;归一化侵彻深度随归一化撞击速度增加而先增后减;当撞击速度接近混凝土纵波声速时,存在以侵彻深度突降为主要现象的“跨声速效应”。
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| 关 键 词： | 超高速侵彻 混凝土 相似关系 跨声速效应 |
| 收稿时间： | 2019-05-15 |
| 修稿时间： | 2019-06-27 |
SIMILARITY LAWS OF HYPERVELOCITY PENETRATION EFFECTS OF CONCRETE1) |
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| CHENG Yihao, LI Gan, YUE Songlin, ZHANG Zhongwei, SONG Chunming, QIU Yanyu. SIMILARITY LAWS OF HYPERVELOCITY PENETRATION EFFECTS OF CONCRETE1)[J]. Mechanics in Engineering, 2019, 41(5): 543-549. doi: 10.6052/1000-0879-19-192 |
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| Authors: | CHENG Yihao LI Gan YUE Songlin ZHANG Zhongwei SONG Chunming QIU Yanyu |
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| Affiliation: | *Field Engineering College, Army Engineering University of PLA, Nanjing 210007, China; †State Key Laboratory of Disaster Prevention and Mitigation of Explosive and Impact, Army Engineering University of PLA, Nanjing 210007, China; **School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China |
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| Abstract: | To study the similarity laws of the hypervelocity penetration effects of concrete, the basic theories of similarity laws are firstly reviewed briefly, and the hypervelocity penetration experiments of concrete are conducted in the velocity range from 1.4 km/s to 3.9 km/s. According to the experimental results of this study and those in the related literature, the principal similarity criterions are obtained, and the normalized penetration depth is determined by data fitting. It is shown that the normalized penetration depth mainly depends on the Johnson number, the mass density ratio of the projectile to the target and the length-diameter ratio of the projectile, while weakly depends on the strength ratio of the projectile to the target and the nose-shape coefficient of the projectile. The normalized penetration depth firstly increases and then decreases with the increase of the normalized impact velocity, with a sudden drop when the impact velocity is close to the P-wave velocity of concrete, which is named as the “transonic speed effect”. |
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| Keywords: | hypervelocity penetration concrete similarity law transonic speed effect |
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