Hence, we put forward three parameter velocity analysis and its spectrum interpretation.

因此，本文提出了三参数速度分析及其谱的解释方法。

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Semblance spectrum is the important tool to judge whether the migration velocity is correct or not and obtain the velocity update amount in residual curvature migration velocity analysis.

相干谱在剩余曲率偏移速度分析中，是判别速度是否正确以及求取速度更新量的重要工具。

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The modal analysis of the wheel is done using the software ANSYS. Calculate the wheel mobility and the vibration velocity spectrum of the wheel and rail is calculated.

运用ANSYS对车轮进行了模态分析，求得车轮导纳以及钢轨和车轮振动速度的功率谱。

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