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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第9卷    第1期    总第45期    2012年2月

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文章编号:1672-7029(2012)01-0018-06
隧道爆破振速小波包及数值模拟对比分析
曹琦,傅鹤林,王松周,刘运思

(中南大学土木工程学院,湖南长沙410075)

摘 要: 以某浅埋隧道为背景,对隧道开挖的爆破效应进行了数值模拟,获得各测点峰值振速; 并应用小波包理论对实测峰值振速进行分析,得到了峰值振速预报值。对比实测振速峰值,发现影响爆破振速模拟值准确性的关键是振动荷载的计算,且数值模拟值偏大。小波包分析是建立在对原始爆破信号分析基础上的,其预报值较为精确,是比较理想的方法。

 

关键字: 峰值振速; 数值模拟; 小波包分析

Comparative analysis on wavelet packet and numerical Simulation of tunnel blasting vibration velocity
CAO Qi,FU He-lin,WANG Song-zhou,LIU Yun-si

School of Civil Engineering,Central South University,Changsha 410075,China

Abstract:With a shallow buried tunnel as background,the tunnel excavation blasting effect was numerical simulated,and got the point peak vibrating velocity.Using wavelet packet theory to analyze the peak vibrating velocity,forecast value of peak vibrating velocity has been obtained.Compared with the measured vibration peak speed,the inference of the vibration load was found to be the key factor to the accuracy of the simulation value of blasting vibration velocity,and the numerical simulation value was much larger than the measure value.Wavelet packet analysis was based on the original blasting signal analysis,which is a reasonable method,and much more accurate to forecast values.

 

Key words: peak vibrating velocity; numerical simulation; wavelet packet analysis

ISSN 1672-7029
CN 43-1423/U

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