采用机械阻抗原理，给出了轮轨系统随机激振力功率谱密度函数的理论计算方法。
A theoretical method of the PSD of random excitation force in Wheec-rail system is advanced on the principle of mechanical impedance.
本文研究在未知激振力情况下，由结构随机响应识别结构模态参数的数字处理方法。
The paper studies digital processing methods which identify structural modal parameters from structural random response.
本文研究在未知激振力情况下，由结构随机响应识别结构模态参数的数字处理方法。
The paper studies digital processing methods which identify structural modal parameters from structural random response.
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