蜗壳脉动压力作用下抽水蓄能电站的振动路径研究

基于结构声强理论并在ANSYS中进行二次开发提取计算值,通过origin Pro建立其相关结构的三维矢量图,将振动能量的传递可视化。建立某抽水蓄能电站地下厂房结构的有限元模型,提取发电和抽水两种工况下厂房结构在蜗壳脉动作用下各层的结构声强计算值,分析振动的传递路径并将其可视化。结果表明:发电工况下横河向与顺河向振动自蜗壳流道向上传递中逐渐向边墙立柱转移但仍以风罩为主,而在竖向振动传递中最终以左右岸立柱为主,其结构声强占比为70. 02%;抽水工况下横河向和顺河向的振动传递最终以左右岸立柱为主,竖向振动传递最终以风罩为主,其结构声强占比为61. 22%,与发电工况相反。

Study on vibration path of pumped storage power station under volute fluctuation pressure

Based on the theory of structural sound intensity and the two development in ANSYS, the calculated values are extracted. The vibration energy transmission was visualized by the 3D vector diagram of its related structure established through originPro. The finite element model of the underground powerhouse of a pumped storage power station was established. The sound intensity of each floor of the powerhouse under the action of spiral shell pulsation was extracted and calculated under the two working conditions of power generation and pumping. The transmission path of vibration was analyzed and visualized. The results showed that: Under the condition of power generation, the transverse and downstream vibrations from the spiral case flow channel gradually transfer to the side wall columns, but still mainly wind shield, whereas the left and right bank columns accounted for 70.02% in the vertical vibration transmission. Under pumping condition, the transverse and along-river vibration transmission is dominated by the left and right bank columns, and the vertical vibration transmission is dominated by the wind shield, accounting for 61.22%, which is just opposite to the power generation condition.