Abstract
To investigate the dynamic characteristics of the horizontally encrypted column network spring vibration isolated turbine-generator foundation, according to similarity theory, a 10:1 scale model of the horizontally encrypted column network spring vibration isolated turbine-generator foundation, including two condensers, was tested on site, and the dynamic characteristics of the model are analyzed by excitation method, and the natural frequencies, mode shapes and damping ratio of the integral structure are acquired. This study shows that the first two mode shapes of the turbine-generator foundation are translation and torsion, the high mode shape is accompanied by column-end swing and local distortion; the condenser is more stable in the integral structure; the natural frequency of this foundation is higher than the dual-row column spring vibration isolated turbine-generator foundation, and it is significantly lower than rigid foundation, and the mode shape distribution is different from them.
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