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基于美国西屋公司AP1000设计控制文件的要求,以咸宁核电厂采用的三菱机型汽轮发电机组为例,建立常规框架式基础和弹簧隔振基础2种模型,分别进行动力分析与对比分析,对三菱机型汽轮发电机组采用弹簧隔振基础的可行性进行研究.分析比较结果显示,采用弹簧隔振基础竖向基频可远离机组的运行频率,基础的动力放大系数减小99%,基础的振幅减小50%,地震时转子加速度峰值减小75%.
Based on the requirements of the design control file of AP1000 of Westinghouse Company, taking the Mitsubishi turbine-generator set adopted by Xianning NPP as an example, two models of conventional frame-type foundation and spring-vibration foundation are established, and the dynamic analysis and comparative analysis are carried out respectively. The research on the feasibility of the spring-vibration-proof foundation of Mitsubishi turbine-generator is carried out.The analysis and comparison results show that the vertical fundamental frequency of the spring vibration isolation foundation can be kept away from the operation frequency of the unit, the power amplification factor of the foundation is reduced by 99% 50% decrease in the amplitude of the rotor acceleration peak reduction of 75%.