瑞雷波多模频散的方位各向异性特征

Azimuthally Anisotropy of Multi-mode Rayleigh Waves

基于Thomsen各向异性参数，使用频率一相速度变化率曲线，分析了瑞雷波多模频散的方位各向异性特征。在0°-90°范围内，方位角为45°时，频散方位各向异性程度最大；整体上，高模频散的方位各向异性度大于基模。

The discussion of Rayleigh waves in near-surface investigations is rarely based on layered anisotropy media, even as higher-mode Rayleigh waves are a hot topic in near-surface investigation. This paper discusses the azimuthally anisotropy of multi-mode Rayleigh waves in layered azimuthally anisotropic media. The azimuthally anisotropy degree of 45°is the highest. In most situations, the higher modes of Rayleigh waves are more sensitive to the azimuthally anisotropy than the fundamental mode.