The first ten natural frequencies, dampingratios 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。
3
Its application needs only frequencies and dampingratios of closed-loop and flexible modes and can be used to eliminate arbitrary vibration modes simultaneously.