摘要
以某大型水电站地面厂房为例,建立了厂房结构三维有限元模型,针对楼板与上下游墙不同的连接方式,研究了厂房结构的固有振动特性,并进行了厂房整体结构的谐响应分析。结果表明,楼板与上下游墙采取搭接方式连接时,楼板和风罩的水平刚度减小,致使厂房上部结构和楼板的振感较强,楼板和风罩结构的水平位移增大,但对厂房结构的动应力影响较小。经综合分析比较,楼板与上下游墙采用搭接方式对厂房结构楼板的抗振较为不利。
A three-dimensional finite element model is established in accordance with a large surface powerhouse in this paper.The natural vibration characteristics of powerhouse structures considering different connection manners between floors and walls are studied.Furthermore,the harmonic responses of the powerhouse structure models under dynamic loads in different calculation schemes are analyzed.According to the results,the vibration responses of superstructures and floors are stronger,and the horizontal vibration displacement of ventilation barrels and floors are greater due to the stiffness decrease in ventilation barrels and floors while the floors are lapped with walls.In conclusion,it is unfavorable to the powerhouse floors＇ anti-vibration.
出处
《中国农村水利水电》
北大核心
2011年第10期96-98,105,共4页
China Rural Water and Hydropower
关键词
水工结构
动力特性
有限元法
水电站厂房
楼板连接方式
hydraulic structure
dynamic characteristic
FEM
hydropower house
connection manner of floors
