单段爆破震动的动态响应分析

来源期刊:中南大学学报(自然科学版)2007年第3期

论文作者:凌同华 李夕兵 王桂尧

文章页码:551 - 551

关键词:爆破地震效应;反应谱;三角插值;单自由度体系

Key words:blast seismic effect; response spectrum; trigonometric interpolation; system with one degree of freedom

摘    要:利用反应谱理论对单段爆破的地震效应进行研究。根据单自由度体系反应谱理论,采用计算量少、精确度高的三角插值解析公式法取代常用的分段线性插值法进行反应谱数值计算;结合工程爆破地震实测资料,对不同爆炸参量下产生的单段爆破震动信号进行反应谱分析,探讨爆炸参量对爆破震动反应谱的影响。研究结果表明,单段爆破产生的震动其频率成分相对简单;单段爆破震动的动态响应特征与爆炸参量有着密切的关系,特别是最大段药量对其影响最大。该方法可用于研究爆破地震效应特别是爆破震动危害控制和预测。

Abstract: Seismic effect of single-interval-time in millisecond blast was studied by means of response spectrum. Based on response spectrum of system with one degree of freedom, response spectrum was calculated using analytical expression of trigonometric interpolation with great efficiency and high precision in calculation instead of segmented linear interpolation. According to the monitoring data from engineering blast, vibration signals of single-interval-time in millisecond blast with different explosion parameters were analyzed by response spectrum, and the influence of explosion parameters on response spectrum of single-interval-time in millisecond blast was principally explored. The results show that the frequency composition is simple relatively in blast vibration induced by single-interval-time; response characteristics of blast vibration in structure have close relation to explosion parameters, especially, the influence of maximum decking charge. It can be used to study blast seismic effect to control and forecast blast vibration damage.

基金信息:中国博士后基金资助项目

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