浅水爆炸下高桩钢管柱表面作用荷载实验研究

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振动与冲击 ›› 2020, Vol. 39 ›› Issue (1) : 70-78.

论文

庄铁栓1,2，王明洋1，伍俊2，张涛2，杨程宇2，闫民华2

作者信息 +

Tests for surface loading of high pile steel pipe column under shallow water explosion

ZHUANG Tieshuan1,2, WANG Mingyang1, WU Jun2, ZHANG Tao2, YANG Chengyu2, YAN Minhua2

Author information +

文章历史 +

摘要

通过不同炸药量、不同爆炸距离、不同起爆深度的水中爆炸模型实验，研究了浅水爆炸条件下高桩钢管柱表面压力特征和空间分布规律，分析了比例爆距对冲击波峰值及空间分布影响，给出了钢管柱表面冲击波反射系数、绕射系数和抗爆设计中实际作用冲击波的工程算法。研究结果表明：水中爆炸作用下，反射和绕射冲击波近似同时作用在钢管柱表面，峰值沿柱身高度方向非均匀分；冲击波受水面影响程度相对较小，二次气泡脉动受水面影响程度较大；反射和绕射冲击波峰值均随炸药量增加、作用距离减小而增加。比例爆距相同，反射冲击波峰值相同，但炸药量小、爆炸距离近的实验工况绕射冲击波峰值相对较小；钢管柱表面冲击波反射系数和绕射系数随比例爆距增加而减小。比例爆距≥1.71时，钢管柱实际作用冲击波峰值可近似按自由场冲击波峰值的1.37倍计算。

Abstract

Taking a steel pipe column of high pile as the study object, underwater explosion model tests were conducted under different conditions including different explosive quantities, explosion distances and detonation depths. Characteristics and spatial distributions of explosion pressure on steel pipe column surface under shallow water explosion were studied. Effects of proportional explosion distances on peak value of shock wave and spatial distribution were analyzed. Reflection coefficient, diffraction one of steel pipe column surface shock wave and the engineering calculation method for actual shock wave acting on the column surface in anti-blast design were deduced. The study results showed that under action of underwater explosion, reflection shock wave and diffraction one act almost simultaneously on steel pipe column surface, and their peaks are non-uniformly distributed in direction of pipe column height; free water surface has less effects on shock wave, but it has larger effects on the secondary bubble pulsation; peak values of reflection and diffraction shock waves increase with increase in explosive quantities and decrease in explosion distances; if proportional explosion distance and reflection shock wave peak value keep unchanged, diffraction shock wave peak value is smaller when explosive quantities and explosion distance are smaller; steel pipe column surface’s shock wave reflection coefficient and diffraction one decrease with increase in proportional explosion distances; when proportional explosion distance is greater than 1.71, the actual shock wave acting on steel pipe column surface can be calculated approximately according to 1.37 times of free field shock wave peak value.

导出引用

庄铁栓1,2，王明洋1，伍俊2，张涛2，杨程宇2，闫民华2. 浅水爆炸下高桩钢管柱表面作用荷载实验研究[J]. 振动与冲击, 2020, 39(1): 70-78

ZHUANG Tieshuan1,2, WANG Mingyang1, WU Jun2, ZHANG Tao2, YANG Chengyu2, YAN Minhua2. Tests for surface loading of high pile steel pipe column under shallow water explosion[J]. Journal of Vibration and Shock, 2020, 39(1): 70-78

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