高铁地震震源子波时间函数及验证

Wavelet time function of high-speed-train seismic source and verification

基于纵横波产生机理并结合高铁列车及铁轨结构,本文给出了高铁列车产生地震纵波及横波震源(点源及等效源)子波的时间函数;通过实际高铁地震数据及合成高铁地震数据分析,验证了高铁地震震源子波时间函数的合理性;在高铁列车匀速、加速及减速运行情况下,利用高铁地震点源子波合成记录分析了高铁地震震源子波的频谱特征,为实际高铁地震数据处理解释奠定了良好的基础.

Based on the generation mechanism of P- and S-waves and structures of high-speed-trains and high-speed-railway,this paper presents a high-speed-train seismic wavelet time function of P- and S-wave sources (point source and equivalent source) by a high-speed-train.Spectrum analysis of actual and synthetic data verifies this function is reasonable.Using synthetic records of wavelets by a point source,this paper analyzes the features of spectra of these wavelets in the cases of uniforMSpeed,acceleration and deceleration,providing a basis for processing and interpretation of real data.