大型汽轮发电机组框架式基础的动力特性研究

Research on Dynamic Behavior of Frame Foundation for Large-Scale Steam Turbine -Generator Set

对大型汽轮发电机组框架式基础利用子结构法进行了动力学建模分析。平台、立柱框架部分采用梁单元进行离散化 ,基础底板则采用弹性薄板的 Ritz函数近似解来模拟 ,从而有效地解决了基础与地基的边界接触问题。根据该动力学模型编制了 FFAS框架式基础动力特性分析软件 ,并对国内某电厂的 1台 60 0 MW汽轮发电机组框架式基础进行了动力特性分析计算 ,并得出了结论。图 8表 2参

In this paper, the dynamic model building of frame foundation for large scale steam turbine generator set is performed by substructure method. All the major components of frame foundation, including deck, piers, foundation mat, and soil medium, have been included. Deck and piers are treated as 3 D beam element, foundation mat is treated as elastic thin plate and simulated by approximate solution of Ritz function. Furthermore, FFAS software package is developed on the basis of the dynamic model, internal characteristics and dynamic response of frame foundation for a 600MW steam turbine generator set are analysed by FFAS. And some important results are concluded, which is of some value to the design of frame foundation for large scale steam turbine generator set. Figs 8, tables 2 and refs 8.