異方性体中の動弾性ドプラー効果

抄録

SH-wave response to a moving source in a simple anisotropic solid is considered. A general integration form for the response is derived and then Doppler frequency shifts produced by linear and circular motions of a time-harmonic source are discussed. Due to the anisotropy, the frequency shifts at two opposite observing points are not same. It is also shown that the Mach number should be defined by the ratio of the source velocity to the body wave velocity along the source path. Two frequency shifts are found when a time-harmonic source is moving on a circular path. They are the primary and secondary frequency shifts. The primary shift, which is the regular Doppler effect, is observed when the source passes through the nearest point of the observing point. But, the secondary shift is observed when the source is almost opposite side to the observing point.