| 有限长柱形药包土中爆腔特征尺寸的计算方法 |
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| 引用本文： | 李鹏毅,王仲琦,徐谦,梁形形.有限长柱形药包土中爆腔特征尺寸的计算方法[J].爆炸与冲击,2019,39(12). |
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| 作者姓名： | 李鹏毅 王仲琦 徐谦 梁形形 |
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| 作者单位： | 北京理工大学爆炸科学与技术国家重点实验室,北京 100081;北京理工大学爆炸科学与技术国家重点实验室,北京 100081;北京理工大学爆炸科学与技术国家重点实验室,北京 100081;北京理工大学爆炸科学与技术国家重点实验室,北京 100081 |
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| 基金项目： | 国家科技重大专项(2016ZX05006-002) |
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| 摘 要： | 为计算柱形药包土中爆腔尺寸，提出了一种有限长柱形药包在土中爆炸的特征尺寸近似计算方法，该方法利用球形药包爆腔膨胀准静态模型叠加的方式，给出了长径比较大情况下柱形药包爆腔特征尺寸及塑性区半径。与数值模拟对比表明，该方法的误差随长径比的增大而减小，当球形药包数量N=n、长径比在10及以上时，误差在12.2%以内，表明该方法能够较准确地预测有限长柱形药包爆腔的特征尺寸。
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| 关 键 词： | 柱形药包 爆腔尺寸 塑性区 长径比 |
| 收稿时间： | 2018-10-22 |
Calculation methods for characteristic sizes of blasting cavities induced by finite-length cylindrical charges in soil |
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| Institution: | State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China |
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| Abstract: | In order to calculate the cavity sizes for the cylindrical charges in soil, a new method was established to calculate the characteristic cavity sizes for finite-length cylindrical charges in soil. In the new method, the quasi-static model for spherical charges is used to calculate the cavities induced by cylindrical charges. In this method, the characteristic cavity sizes and the plastic zones are calculated at the larger length-to-diameter ratio. The numerical simulation results show that the error decreases with the increase of the length-to-diameter ratio, when the number N of the spherical explosive packages is n and the length-to-diameter ratio is 10 or higher, the error is less than 12.2%. The results also show that the established method can accurately predict the characteristic sizes of the cavities induced by the finite-length cylindrical charge blasting. |
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