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.
随机减量技术的主要优点是，它只要求测量动力响应而不要求测量引起该响应的随机激振。
The major advantage of the Randomdec is that it requires only measurements of the dynamic response and not the random excitation causing the response.
本文应用非线性谱分析法对随机激振位移作用下大位移单摆的非线性随机响应进行了分析。
Under the action of random exciting displacement, the response of a simple pendulum with large displacement was studied in this paper by means of nonlinear spectral analysis.
研究结果表明，相对伪随机激振法适用于机床结构的动态测试，具有较高的测试精度和效率。
As a result of experiment, the relative pseudorandom exciting method is applicable in the dynamic experiment of machine tool structure, with higher precision and efficiency.
该试验台可为减振器试验提供简谐波、方波、锯齿波、随机路面谱等多种激振波形。
This test bench can provide a variety waveforms including: sine, square, saw-tooth, random road surface.
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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