【摘要】 该文得出热弹性介质中波的基本形式有准弹性纵波、横波和具有有限传播速度的温度波,并指出横波在传播过程中同其在完全弹性介质中一样是不衰减的,而准弹性纵波和温度波是相互伴随的、衰减的。其次,给出了具有两种不同传播速度的准弹性纵波的基本形式。最后,将地震P波看作由初始位移扰动的准弹性纵波,就固定频率和固定波长两种情况分别给出了相应Qr值的计算公式和近似公式。通常人们是利用多台的地震波资料在空间域中计算Qr值,而本文得到的时间域中Qr值的近似公式,为利用单台地震P波资料计算Qr值提供了一种方法。更多还原

【Abstract】 At first,the paper indicates that in the thermoelastic medium,the basic forms of waves include the quasi-elastic longitudinal wave,transverse wave and the wave of temperature with a finite propagate velocity.The paper also indicates that the transverse wave does not attenuate in the process of propagation as in the purely elastic medium,but the quasi-elastic longitudinal wave and the temperature wave are concomitant and attenuate.Second,the paper points out two basic forms of the quasi-elastic longitudinal wave,which has two different propagate velocity.Finally,the seismic P-wave is regarded as the quasi-elastic longitudinal wave,which is excited from the initial displacements.Both fixed frequency and wavelength are supplied with calculating and approximating formulas for relevant Qr.The approximate formula of Qr the time-region provides a method for calculating Qr value by using the seismic P-wave data from single seismic observation station.更多还原