摘要
结合某蓄能电站工程,分别应用快速傅立叶变换和小波包理论分析了隧道掘进爆破振动的特点,它的能量和频率特性表现出随着装药量的增加,主震频率降低,能量也相对的集中在较低的频段上的特点。由于隧道开挖采用多段微差爆破,所以多数实测爆破地震波中存在多个优势频率峰值,能量带分布很宽。结构物对爆破振动荷载的动态响应,是其对于不同优势频率的细节信号的不同的动态响应的叠加的结果。
Combined with storage station project, the FFT and wavelet theory are used to analyze the character of tunnel excavation blasting vibration ： with the increase of charge, main frequency decreases and energy centralizes in lower frequency belt. Multi-millisecond blasting is used in tunnel excavation, so there are several dominating frequency peak values in actual observation blasting seismic, and the energy distribution belt is wide. Under blasting vibrating load, the dynamic response of the structure results from the superposed results of its dynamic response to various dominating frequency detail signals.
出处
《爆破》
CSCD
2005年第4期110-115,共6页
Blasting
