【摘要】 准确提取频散曲线是瑞雷波勘探的重要环节,检验各种频散曲线求取方法的正确性和稳定性至关重要。基于频散曲线,选择抽样脉冲信号作为子波,推导出了合成单炮面波地震记录的理论公式,并利用该公式,针对不同弹性层状介质模型的频散曲线合成了面波地震记录。通过对其波场特征对比和频谱分析,同时采用频率-波数域法反求其频散曲线,结果与模型频散曲线几乎相同,从而充分验证了该面波合成方法的正确性。更多还原

【Abstract】 Accurately calculating dispersion curve in Rayleigh wave exploration is an important step.It is vital to test the correctness and stability of various methods on calculating dispersion curve.This paper,based on disper-sion curve,derives the theory formula of synthesizing single shot surface-wave seismogram,which selects sam-pling pulse signal as a wavelet,and surface-wave seismograms for dispersion curves of several elastic layered me-dia are sythesised by the formula.It is sufficiently proved that the synthetic method is correct by wave field char-acteristic contrast,frequency spectrum analysis,and inversely calculated their dispersion curves by frequency-wave number analysis method,so this method provides a new theoretical principle and means to evaluate other methods of extracting dispersion curve.更多还原