摘要
在各向同性的弹性均匀固体地层中，对不同介质的固体圆柱中对称点源激发的声波场进行了理论研究和数值求解，详细地分析了沿圆柱轴向传播的导波的频散及激发特性。计算了与柱外介质纵、横支点对应的临界折射波。在分波分析的基础上，还进一步研究了瞬态全波场的数值模拟。计算了在不同地层参数条件下，固体圆柱界面上不同点的轴向位移瞬态全波曲线。
The acoustic field excited by a symmetric point source in a solid surrounded by an isotropic elastic solid formation is theoretically and numerically investigated.The dispersion and excitation of the guided waves propagating along the axis of the cylinder are analyzed.It is found that the modes could be only excited when the shear wave speed of the formation is greater than that of the cylinder.The branch cut integrations along the branch points of the compressional and shear waves of the formation are also studied. There are many resonance peaks in the spectra of p and s waves.On the basis of the analysis of the component waves,the full wave forms in the time domain are numerically investigated,and the radial and axial displacements in different parameters are calculated in detail.
出处
《大庆石油学院学报》
CAS
北大核心
1996年第3期92-96,共5页
Journal of Daqing Petroleum Institute
基金
国家自然科学基金
关键词
桩基
固体圆柱
折射震相
弹性动力学
stake,solid cylinder,guided wave, reflected seismic wave,full-wave forms
