微动H/V谱比法通过计算微动信号水平分量H和垂直分量V的振幅谱比值研究场地响应，在工程地震领域得到广泛应用。为研究微动H/V曲线的反演方法，通过扩散场方法正演分析微动H/V曲线，探索不同地层参数对微动H/V曲线的影响，并通过实例验证反演方法的有效性。正演结果表明，地层厚度和横波速度对微动H/V曲线的形态和峰值频率有显著影响，纵波速度和介质密度的变化对峰值频率和幅值基本没有影响，反演时应主要考虑地层厚度和横波速度。对3种典型地层模型的反演结果表明，速度递增地层模型的反演误差较小，含高速硬夹层模型和含低速软夹层模型的误差相对较大。采集了微动数据，并计算了实测的H/V曲线。通过对实测H/V曲线进行反演，得到的结果与钻孔资料较为一致，能较好识别基岩面埋深。因此，微动H/V谱比法可以有效反演地层波速结构。

The microtremor H/V spectral ratio method, which studies site response by calculating the amplitude spectral ratio of the horizontal and vertical components of microtremor signals, has been widely applied in the field of engineering seismology. To investigate the inversion methods for the microtremor H/V curve, the forward analysis of the microtremor H/V spectral ratio curve was carried out using the diffuse field method. This process explored the influence of various subsurface parameters on the microtremor H/V curve and validated the effectiveness of the inversion method through case studies. The forward analysis results indicated that layer thickness and shear wave velocity significantly affected the shape and peak frequency of the microtremor H/V curve, while changes in compressional wave velocity and medium density had negligible effects on the peak frequency and amplitude. Therefore, layer thickness and shear wave velocity should be primarily considered during inversion. The inversion results of three typical subsurface models showed that the model with increasing velocity layers had smaller inversion errors, while the models with high-velocity hard interlayers and low-velocity soft interlayers had relatively larger errors. Microtremor data were collected, and the measured H/V curve was calculated. The inversion results of the measured H/V curve are consistent with the drilling data and can effectively identify the depth of the bedrock surface. Thus, the microtremor H/V spectral ratio method can effectively invert the subsurface wave velocity structure.