The first ten natural frequencies, damping ratios and mode shapes of the dam were measured through steady forcedvibrationtest using multiple vibrators.
用多台起振机进行稳态强迫振动试验,测定了该坝前十阶自振频率、阻尼和振型。
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Compared with forcedvibration tests, the ambient vibration test is more convenient and it has enough accuracy for the small amplitude response characteristics.