水电能源科学

为探究水泵机组压力脉动对厂房结构产生的影响，以打渔张泵站厂房为例，基于原型观测数据结合三维有限元模拟分析厂房结构的振源组成及振动特性，并从结构共振校核和振动响应出发对结构的安全性进行分析评价。结果表明，机组稳定运行工况下，动静干涉(RSI)引起的水力脉动与机组运行引起的转倍频激振对厂房振动影响最大，且与局部楼板结构自振频率遇合度较小，易发生共振；但从振动反应角度分析各局部部位的振动响应均在允许范围内，出水弯管和泵座处最大，水泵层楼板最小。研究结果对实现泵站厂房结构的长久安全运行具有重要的理论价值和现实意义。

In order to explore the influence of pressure pulsation of the pumping unit on the powerhouse structure, the powerhouse of Dayuzhang pumping station was taken for an example. Based on the prototype observation data, the vibration source composition and vibration characteristics of powerhouse structure were analyzed using three-dimensional finite element simulation. The safety of the structure was analyzed and evaluated from the perspective of structural resonance check and vibration response. The results show that the hydraulic pulsation caused by RSI and the rotational frequency excitation caused by the operation of the unit have the greatest impact on the vibration of powerhouse under the stable operation condition of the unit, and the natural frequency of the local floor structure has a small degree of coincidence, which is easy to resonate. However, from the perspective of vibration response, the vibration response of each local part is within the allowable range, the outlet elbow and pump seat are the largest, and the pump floor slab is the smallest. This study has important theoretical value and practical significance for realizing the long-term and safe operation of the pumping station powerhouse structure.