变埋深条件下混凝土中爆炸加速度的传播规律

穆朝民1, 2, 3,任辉启4,石必明1

振动与冲击 ›› 2016, Vol. 35 ›› Issue (3) : 1-6.

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (3) : 1-6.
论文

变埋深条件下混凝土中爆炸加速度的传播规律

  • 穆朝民1, 2, 3,任辉启4,石必明1
作者信息 +

Investigate on shock acceleration of concrete at depths of burst

  • MU Chao-min1, 2, 3, REN Huiqi4,SHI Biming1
Author information +
文章历史 +

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。

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.  
 

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

Key words

explosion mechanics;concrete;dimensional analysis;acceleration / depths of burst(DOB) coefficient of equivalent yield

引用本文

导出引用
穆朝民1, 2, 3,任辉启4,石必明1. 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
MU Chao-min1, 2, 3, REN Huiqi4,SHI Biming1. Investigate on shock acceleration of concrete at depths of burst[J]. Journal of Vibration and Shock, 2016, 35(3): 1-6

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