摘要
用波形反演法对杆状样品的实测波形进行了Q值计算 .用高Q值金属样品和岩石样品分别进行计算对照的结果表明 ,该方法具有比较好的可靠性 .分析了实验波形的速度频散现象 ,认为 ,由衰减引起的速度对数频散在杆波情况下仍然成立 ,但即使在Q值较小时 ,对波形的影响也不显著 。
We calculated the Q values of bar samples from the measured waveform using waveform inversion technique. The samples include metal and rocks. The results of calculation indicated that this method is reliable. Furthermore, we analyzed the velocity dispersion of the waveform in the experiment, and considered that the logarithm dispersion caused by attenuation is working for the bar wave, but will not affect much the waveform even while the Q value is small. Therefore, it will not do obvious effect on the credibility of inversion calculation.
出处
《地球物理学进展》
CSCD
2001年第1期31-38,共8页
Progress in Geophysics
基金
国家自然科学基金项目! (4 9874 0 4 3)
地震科学联合基金项目!(1980 90 )
