摘要
随着水轮发电机组单机容量的提高,机组转动部件的重量、轴向水推力以及作用在支撑结构上的机组偏心力、不平衡磁拉力及电磁扭矩均会显著增大。为确保结构安全,对大型水电站厂房进行在机组振动荷载下的振动反应分析具有十分重要的意义。以锦屏一级水电站地下厂房为例,采用三维有限元法,计算了正常运行工况和事故工况下,厂房结构的振动位移、速度、加速度和应力。结果表明,锦屏一级水电站地下厂房在机组振动荷载作用下的动力反应满足规范和建议的厂房振动控制标准的要求。
With the increase of unit capacity of hydroelectric sets,the weight of rotating parts,the axial hydraulic thrust as well as the eccentric force and the unbalanced magnetic pull,and the electromagnetic torque on generator pedestals will increase remarkably.Therefore,it is of great importance to analyze the vibration responses of large-scale hydropower house under vibration loads of hydroelectric units.Taking the underground house of Jinping Ⅰ Hydropower Station as an example,the vibration displacement,velocity,acceleration and the stress of pedestal structure and floors under normal operation condition and several typical accident conditions are investigated and calculated by three-dimensional finite element method（FEM）.The results show that the vibration responses of this hydropower house could meet the requirements of related standards.
出处
《水利与建筑工程学报》
2011年第5期41-44,53,共5页
Journal of Water Resources and Architectural Engineering
基金
国家自然科学基金(50679009)
大连理工大学博士启动项目(893325)
