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岭澳二期核电站3、4号汽轮发电机组采用弹簧隔振基础,这是弹簧隔振基础在我国半速机组上的首次应用.按照基础台板模板拆除后汽轮发电机组安装前、机组安装完毕后运行调试前、机组调试期间、机组满负荷运行、机组满负荷运行半年后等5个不同阶段对弹簧基础进行了现场动力特性测试,通过现场测试得到弹簧基础的自振频率及模态、模态阻尼比、台板动刚度、各轴承点振动速度等实测数据,对比其中某些阶段的实测结果与模型计算结果,并分析其存在的差异,为我国大型汽轮发电机弹簧隔振基础的设计提供参考.
The No. 3 and No. 4 turbine units of Ling’ao Phase II NPP adopt the spring vibration isolation foundation, which is the first application of the spring vibration isolation foundation in China’s half-speed generating units. Before the installation of the turbine generating units after the foundation platen is removed, After the installation is completed, the spring foundation is tested on the site before commissioning, during the commissioning of the unit, at full load of the unit, after six months of operation of the unit at full load, and the natural frequency and mode of the spring foundation , The modal damping ratio, the dynamic stiffness of the platen and the vibration speed of each bearing point are compared with the measured results of some stages and the calculation results of the model, and the differences are analyzed. Basic design for reference.