单轴压缩下大理岩的Q值与频率关系的研究  

STUDY OF QUALITY FACTOR Q AS A FUNCTION OF FREQUENCIES UNDER UNIAXIAL PRESSURE IN LAI YANG MARBLE

作　　者：马丽云[1] 赵建华[1] 戴飒 孙达江[1] 

机构地区：[1]中国科学院地球物理研究所,北京100101

出　　处：《地球物理学报》1990年第6期689-693,共5页Chinese Journal of Geophysics

基　　金：国家自然科学基金

摘　　要：实验采用单轴压缩循环加载方式,在地震频段内测量了莱阳大理岩的品质因数Q值.在频率为0.1—10 Hz范围内,Q值随频率变化是非线性的,而且在5 Hz附近出现峰值.用正弦波和用三角波两种方式加载所获得的Q值与频率关系很相似,并且三角波加载所测得的Q值普遍高于用正弦波加载测得的Q值.疲劳试验结果表明,正弦波循环加载大大降低了岩石的强度,三角波则对岩石强度降低较少.The results of Lai Yang marble under uniaxial pressure cyclic loading tests, frequency range from 0.1 to 10Hz are presented in this paper. The results show that, quality factor Q is not linearly dependent on frequency. An apparent peak in Q at about 5 Hz both in sine and triangle loading test was observed. Under the same stress level, the Q values perfomed in triangle waveform loading are generally higher than that in sine's.In cyclic fatigue loading tests the strength of rock is reduced. And strength reduce is much more in sine waveform loading than that in triangle waveform loading.

关 键 词：大理岩 Q值 频率 关系 品质因数 

分 类 号：P588.313[天文地球—岩石学]