抽水蓄能电站地下主副厂房振动传递途径研究

Vibrational Travel and Behavior of Pumped Storage Power Station Underground Powerhouse

以某抽水蓄能电站地下厂房为工程实例,采用有限元法,建立地下主厂房与副厂房的耦联体系,对副厂房进行了自振特性和共振复核的分析计算。通过改变主副厂房间结构缝填充材料的物理力学参数,并以楼板的振动响应为依据,探讨了抽水蓄能电站地下主副厂房间振动传递的途径和规律。结果表明,副厂房楼板的振动大部分依靠围岩传递;当结构缝填充材料弹性模量较大时,在高频流道脉动压力作用下,与荷载作用位置较近的副厂房楼板的纵向振动主要通过结构缝的填充材料进行传递。研究所得相关结论为副厂房楼板的隔振减振提供有力依据。

By taking a pumped-storage power station underground powerhouse as an example,this paper developed a coupled finite element model of the main machine hall and the auxiliary plant,and the self-vibration features of the auxiliary powerhouse was analyzed and its resonance feature was checked. By changing the mechanical parameters of the filer material between the main powerhouse and the assistant powerhouse,and based on the vibration response of a floor to discuss the vibrational travel and behavior. The results show that the vibration of auxiliary powerhouse most depend on the surrounding rock; when the elastic modulus larger structure seam filler material,under the effect of flow pulsation pressure in high frequency,the vibration of auxiliary powerhouse that close to load position mainly through the joint filler for transfer. The results could provide valuable references to the vibration separation and vibration reduction of auxiliary powerhouse.