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sonic field
相关语句
  声场
    The theoretical result is in good agreement with the experimental result, proving that FEM is an effective way to study sonic field in fluid filled borehole in the complex formation.
    数值计算结果与实验结果具有很好的一致性。 结果表明 ,有限元素法是研究复杂地层充液井孔中声场的有效工具。
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  sonic field
Convective heat transfer in response to a sonic field in saturated sand
      
With the objective of a preferably diffuse distributed sonic field we applied frequency modulated ultrasound to the material.
      
Milk droplets with uniform dimensions are also produced by creating a sonic field at a constant frequency in the vicinity of the atomizer.
      


An investigation is made on acoustic full waveforms in borehole with vertical fractures in formation by using Finite Element Method (FEM). When the vertical fractures exist, both refracted and reflected compressional waves are received. The theoretical result is in good agreement with the experimental result, proving that FEM is an effective way to study sonic field in fluid filled borehole in the complex formation.

利用有限元素法计算了井孔附近存在垂直裂缝时井孔中的声波全波波列。数值计算结果表明 ,在接收的声波全波列波形中 ,即存在折射的纵波 ,又存在来自井孔附近垂直裂缝的反射纵波。数值计算结果与实验结果具有很好的一致性。结果表明 ,有限元素法是研究复杂地层充液井孔中声场的有效工具。

D sonic field activated by eccentric source in boreholes and P wave, S wave and Stoneley wave in different positions on the boreholes, especially circumferential propagation features of Stoneley wave on borehole walls, acoustic field distributions on the boreholes generated by sonic source near the borehole walls, are determined by real axis integration. Based on 2D acoustic distributions on the boundary between fluid and solid, it is possible to measure the sound velocities in horizontal or...

D sonic field activated by eccentric source in boreholes and P wave, S wave and Stoneley wave in different positions on the boreholes, especially circumferential propagation features of Stoneley wave on borehole walls, acoustic field distributions on the boreholes generated by sonic source near the borehole walls, are determined by real axis integration. Based on 2D acoustic distributions on the boundary between fluid and solid, it is possible to measure the sound velocities in horizontal or near horizontal formations. 3D calculations indicate the sonic field distributions on the borehole in different time, which visualizes not only amplitudes of various waves at different levels and azimuths, but also provides approximate changes of P wave and S wave propagating time as near or far acoustic sources and azimuths change.

根据井内偏心声源激发的二维声场及井壁不同位置的波形可以在井壁上激发环绕井壁传播纵波、横波及其它面波的理论 ,用实轴积分法计算了位于井壁附近的声源在井内液体和固体界面上激发的声场 ;结合液体与固体中的二维声场分布特征 ,探讨了测量地层水平或接近地层水平方向声速的可能性 ;由三维计算结果显示井壁上不同时刻的声场分布 ,直观显示各种波在不同水平面、不同方位角处的幅度分布 ,得到了纵波、横波的传播时间随源距和方位角的不同的近似变化规律

 
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