... 强制振动 forced vibration 强制振动试验 forced vibration test 强制抽气冷却塔 forced-air-draft cooling tower ...
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The first ten natural frequencies, damping ratios and mode shapes of the dam were measured through steady forced vibration test 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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