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。
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.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第3期551-554,共4页
Journal of Central South University:Science and Technology
基金
中国博士后基金资助项目(2004036430)
关键词
爆破地震效应
反应谱
三角插值
单自由度体系
blast seismic effect
response spectrum
trigonometric interpolation
system with one degree of freedom
