大型水电站厂房上部结构振动特性研究

Study on viberation characteristics of super-structure for powerhouse of a large hydropower station

以某水电站厂房上部结构为研究对象,其采用了厚混凝土墙、网架结构,通过三维有限元计算和现场测试,深入细致地研究其振动特性。通过分析,发现由于厚混凝土墙和网架结构的采用,厂房上部结构出现新的振动特点。同时,有限元计算和现场测试两种方法所得结果吻合得非常好,说明数值计算和现场测试的有效性,为结构的动力学仿真研究奠定了基础。

The super-structure for the powerhouse of a hydropower station is studied herein; in which the viberation characteristics of the thick concrete wall and the grid structure adopted therein are detailedly studied with 3D finite element method and the field experiment. It is found through the analysis concerned that a new viberation feature is created in the super-structure due to the adoption of the thick concrete wall and the grid structure. At the same time, the results from both the methods are fit each other closely,which demonstrate that the numerical calculation and the field experiment are effective and lay a basis for the kinetic simulation study on the structure concerned.