热电联产燃汽轮机机组汽轮发电机基础动力特性研究

Study of dynamic characteristics of cogeneration gas-turbine generator foundation

采用数值仿真和1∶10模型试验手段对国内自主设计的390MW(F级)热电联产燃气轮机机组汽轮发电机基础进行动力特性研究,得到了该基础的模态频率分布规律.在此基础上运用模态叠加法对基础在扰力作用下的强迫振动响应进行了分析.研究结果表明,数值仿真和模型试验结果具有较高的吻合性,基础的动力特性完全满足《动力机器基础设计规范》(GB 50040-96)的要求,设计是完全合理的.相关数据可为今后该类型基础的设计、优化提供参考.

Dynamic characteristics of 390MW(Class F)cogeneration gas turbine generator foundation was studied by numerical simulation and 1:10 model test;and the distribution of modal frequency was obtained.On this basis,forced vibration response under the disturbing force was analysed by mode superposition method.The results show that the numerical simulation and model test results are in good agreement;and the dynamic characteristics of the foundation meet the requirements of'Code for Design of Dynamic Machine Foundation'(GB 50040-96)better,and also the design is entirely reasonable.The relevant data can provide reference for optimization design of this type foundation.