工程爆破

2001, (04) 7-10

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爆炸地震地面振动速度的随机相似性
RANDOM SIMILARITY OF GROUND VIBRATION VELOCITIES FROM EXPLOSION SEISM

林大超,张奇,熊祖钊,白春华
LIN Da chao 1,2 ,ZHANG Qi 1,XIONG Zu zhao 1,BAI Chun hua 1 (1 Beijing Institute of Technology,Beijing 100081,China; 2 Tsinghua University,Beijing 100084,China)

摘要(Abstract):

根据实验测试结果 ,讨论了爆炸地震地面振动的随机相似现象。提出了利用速度时间历程及其功率谱密度函数判别随机相似性出现的条件。当爆炸源和所研究地面振动地点的位置确定时 ,如果功率谱密度函数满足统计相似条件 ,则速度时间历程具有随机相似性。所提出的研究结果在一定程度上为实际爆炸地震地面振动问题的分析提供了方便
The random similarity of ground vibration velocities from explosion seism is discussed on the basis of experimental results A criterion for this similarity is suggested which is related to the velocity time histories and their power spectral density functions When the positions of explosion sources and the locations to be examined are given and identical,a random similarity between the velocity time histories exists if their power spectral density functions follow random similarity The results presented in this study are,to a certain extent,of advantage for the analysis of the actual ground vibrations caused by explosion seism

关键词(KeyWords): 爆炸地震效应;地面运动;随机振动
Explosion seismic effect; Ground motion; Random vibration

Abstract:

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基金项目(Foundation): 国家自然科学基金项目 (19972 0 13;;5 99740 19)

作者(Author): 林大超,张奇,熊祖钊,白春华
LIN Da chao 1,2 ,ZHANG Qi 1,XIONG Zu zhao 1,BAI Chun hua 1 (1 Beijing Institute of Technology,Beijing 100081,China; 2 Tsinghua University,Beijing 100084,China)

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