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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。
Full-wave model phase analysis method is very extensive research, this paper only on the ray analysis, amplitude analysis, spectral analysis, particle vibration mode analysis methods are discussed. 1. Ray analysis is the basis of phase kinematics, kinetic character analysis, analytical methods and mapping can be used to carry out. The former is to mathematically describe the propagation path of seismic facies and lay the foundation for the program analysis of seismic facies analysis. The latter is to directly draw rays according to the model structure. 2. Amplitude analysis is based on the decay pattern established by the measured attenuation curve of the shock waves in the model material. The amplitude and period of a seismic phase at a measuring point depend on the strength of the seismic source and the effect of the medium on the seismic wave during the entire propagation from the source to the measuring point. 3. Spectral analysis is an effective means to study the periodic components of shock waves. The seismic wave spectrum is decomposed into emission spectrum, medium spectrum and reception spectrum. Through the experiment, the spectrum of action of different media can be obtained, which is of significance for the interpretation of seismic exploration and sonic logging data. 4. Particle motion trajectory method and polarization analysis method can be used to study the particle modes caused by different wave modes. Analysis of particle vibration mode, in addition to help confirm the phase, identify the waveform, but also to understand the effect of measuring point on the way and process. In short, through the phase analysis of the full-wave model, the kinematics and dynamics characteristics of the shock wave can be thoroughly and thoroughly understood, and the utilization rate of the information contained in the shock wave is greatly improved.