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传统的τ p变换算法易出现假频和端点效应。基于前人的思想,笔者对时空域中传统的τ p变换算法进行了改进,有效地解决了上述问题。理论模型试算证实了本算法的正确性和有效性,实例分析结果表明,用改进后的τ p变换算法进行波场分离提取瞬态瑞雷波频散曲线具有失真小、可靠性高、压制假频和端点效应好等优点。
The traditional τ p transform algorithm prone to aliasing and end effects. Based on the previous thought, the author improves the traditional τ p transform algorithm in time-space domain, which effectively solves the above problems. The theoretical model test proves the correctness and effectiveness of the proposed algorithm. The results of the example analysis show that using the improved τ p transform algorithm to separate the transient Rayleigh wave dispersion curve has the advantages of low distortion, high reliability, Aliasing and end-point effects and so on.