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| 变埋深条件下混凝土中爆炸加速度的传播规律 | |
| 引用本文： | 穆朝民,任辉启,石必明.变埋深条件下混凝土中爆炸加速度的传播规律[J].振动与冲击,2016,35(3):1-6. |
| 作者姓名： | 穆朝民 任辉启 石必明 |
| 作者单位： | 1.安徽理工大学 能源与安全学院，安徽 淮南 232001； 2.湖南科技大学 煤矿安全开采技术湖南省重点实验室，湖南 湘潭 411201； 3.煤矿安全高效开采省部共建教育部重点实验室，安徽 淮南 232001； 4. 总参工程兵科研三所，河南 洛阳 471023 |
| 摘 要： | 为了研究混凝土中不同埋深爆炸冲击质点振动加速度传播规律，运用量纲分析和自由场实验相结合的方法并引入等效当量系数的概念得出C30混凝土不同埋深爆炸冲击质点振动加速度预估公式。研究结果表明：对于C30混凝土，当装药比例埋深为0.25 m/kg1/3≤h≤1.0m/kg1/3时，随着装药比例埋深的增加，爆炸冲击质点加速度峰值随之增大，但加速度随比例埋深的衰减规律基本一致；对于不同强度的混凝土触地爆（h=0m/kg1/3），随着混凝土强度的增大，爆炸冲击质点加速度峰值随之增大，加速度衰减规律基本一致；给出了C30混凝土不同埋深爆炸冲击质点振动加速度精度较高的预估公式。 |
| 关 键 词： | 爆炸力学 混凝土 量纲分析 加速度 等效当量埋深系数 |
Investigate on shock acceleration of concrete at depths of burst |
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| MU Chao-min,REN Huiqi,SHI Biming.Investigate on shock acceleration of concrete at depths of burst[J].Journal of Vibration and Shock,2016,35(3):1-6. | |
| Authors: | MU Chao-min REN Huiqi SHI Biming |
| Affiliation: | 1.School of Energy Resources and Safety, Anhui University of Science and Technology, Huainan 232001, Anhui, China; 2.Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines, Hunan University of Science and Technology, Xiangtan, Hunan 411201, China 3.Key Lab of Mining Coal Safety and Efficiently Constructed by Anhui Province and Ministry of Education, Huainan 232001, Anhui, China； 4. The Third Research Instituteof Engineers of the General Staff，Luoyang，Henan 471023，China |
| Abstract: | In order to investigate acceleration of concrete at different scaling depths burst (SDOB), the empirical formulate of impact acceleration are deduced by using combination of free field experiment and dimensional analysis that is inducted by DOB coefficient of equivalent yield. The results show that when SDOB is form 0.25 m/kg1/3 to 1.0m/kg1/3, impact acceleration of C30 concrete under blasting point increase with SDOB, but attenuation of shock acceleration of concrete are in agreement at different SDOB. Towards different concrete strength, impact acceleration increase with concrete strength enhancing, and attenuation of acceleration is in concert. The obtained empirical formulate of C30 concrete have high degree of accuracy to predict shock acceleration laws.
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| Keywords: | explosion mechanics concrete dimensional analysis acceleration depths of burst(DOB) coefficient of equivalent yield |
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