全波模型的震相分析(续篇) 射线、振幅、波谱、质点振动方式分析

全波模型震相分析法研究的内容是非常广泛的，本文仅对其中的射线分析、振幅分析、波谱分析、质点振动方式分析等方法进行了探讨。1.射线分析是震相运动学、动力学特征分析的基础，可用解析法和作图法来进行。前者是用数学方法描述震相的传播路径，为震相分析程序化奠定了基础;后者是根据模型结构直接绘制射线。2.振幅分析是利用震波在模型材料中的实测衰减曲线建立的衰减模式来进行的。测点上某一震相的振幅和周期决定于震源强度以及震源到测点的整个传播过程中介质对震波的影响。3.波谱分析是研究震波周期成分的有效手段。将震波波谱分解为发射谱、介质作用谱以及接收谱。通过实验求得不同介质的作用谱，这对于地震勘探、声波测井资料的解释是有参考意义的。4.采用质点运动轨迹图法和偏振分析法可以研究不同的波型所引起的质点振动方式。分析质点振动方式，除帮助确认震相、辨认波形外，还可以了解测点上地震力的作用方式和过程。总之，通过全波模型的震相分析，可以较为深入透彻地了解震波的运动学、动力学特征，使震波中所蕴含信息的利用率大大提高。

Fu11 wave model phase analysis--the analyses of ray path,amplitude, wave spectrum and particle vibration pattern

Full wave model phase analysis technique may involve wide subjects, but this paper only deals with the analysis methods of ray, amplitudes wave spectrum and particle vibration pattern. Ray analysis is the foundation for the analysis of kinernatic and dynamic properties of phase. The ray analysis can be performed using both analytic method and graphic method, The analytic method mathernatically describes the propagation path, making it possible to do phase analysis by computer. The graphic method plots ray path according to model configuration. The amplitude analysis is made using the attenuation model developed from attenuation curve determined when seismic wave travels in model materials. The amplitude and period of a phase at a receiving point depjend.raon soured strength and the effect of medium on seismic wave in the propagating from source to the receiving paint. Spectrurn analysis is a practical means for researching into the period of seismic wave. Seismic wave spectrum can be decomposed into transmitting spectirurn, medium effect spectrum and receiving spectrum.The effect spectra of different media can be used as reference in the interpretations of seismic data and acoustic logging data. Particle vibration diagram and polarisation analysis can be used to research into the particle vibration patterns caused by different kinds of waves. The particle vibration analysis not only helps us distinguish phrase and wave form but also make us understand vibration mechanism at receiving point. To sum up, by full wave model phase analysis, we can have a beter understanding of kinematic and dynamic properties of seismic waves and make full use of informations in seismic waves.