提出用低频超声类兰姆波定征方法来估计超薄黏结复合结构各层与黏结层的厚度、密度、纵波声速和横波声速等参数。
A low frequency ultrasonic Lamb like wave method suitable for characterizing the thickness, density, shear and longitudinal wave velocities of the ultra thin bonding composite is presented.
如果我们已知介质中横波与纵波速度的比值、水平界面的埋藏深度和炮检距，炮点到共转换点的水平距离就可以通过解一个四次方程求出。
Given the velocity ratio of S-to P-waves, the depth of reflector and the offset, the horizontal distance between source and the converting point can be determined by solving a quartic equation.
横波传播不受孔隙流体性质的影响，与纵波相比，横波的近地表层可以达到潜水面以下。
As the S-wave transmission from the impact of fluid properties, compared to the longitudinal wave the near-surface of S-wave can reach under the water table.
横波传播不受孔隙流体性质的影响，与纵波相比，横波的近地表层可以达到潜水面以下。
As the S-wave transmission from the impact of fluid properties, compared to the longitudinal wave the near-surface of S-wave can reach under the water table.
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