【摘要】 从S波（横波）垂直割线积分的表达式出发,对S波的激发特性进行了研究。结果表明S波同P波一样,具有共振与衰减特性,其衰减在共振条件下随源距Z遵循1/Z规律,非共振条件下遵循1/(Z^3/2)规律。通过对S波的时域波形的数值考察,得知“过滤效应”实质上是S波共振激发的反映。从频率域和时域上讧明了共振与衰减是S波重要的激发和传播机制。更多还原

【Abstract】 This paper made a study on the excited property of the S-wave （transverse wave）from the expression of the vertical branch cut intergration of the S-wave.The result showed that the S-wave had the same features of resonance and attenuation as p-wave. In the resonance frequency,the amplitude of S-wave decays in accordance with 1/z, and out of the resonance frequency it decays 1/z^3/2 From the numerical investigation on time domain the paper discovered the"filler effect" is the reflection of the resonance excitation of the S-wave, and showed that the resonance and attenuation is an important excitation and propagation mechanism in the frequency domain and time domain.更多还原