仙居抽水蓄能电站地下厂房振动 数值模拟分析与安全评价

厂房振动问题为抽水蓄能电站设计关键, 以仙居抽水蓄能电站为实例, 对地下厂房进行共振复核和振动反应 分析评价, 在总结国内外控制标准的基础上, 提出了适用该工程的振动控制标准建议值。有限元计算分析表明, 机 墩结构竖向振幅稍大, 需要在结构设计中予以关注; 厂房整体结构和主要构件的共振复核满足要求, 地下厂房发生 共振的可能性较小。振动最大位移、速度和加速度响应幅值均满足所拟定控制标准要求, 其中立柱结构的振动均方 根加速度偏大, 但频率计权加速度幅值较小, 可满足要求。针对立柱等局部构件振动反应偏大的情况, 探讨了局部 加固措施对降低振动强度的有效性, 为同类型厂房抗振动优化设计提供参考。 The vibr ation pr oblem of pow erhouse is the key in desig ning pumped stor age pow er plant. This paper too k Xianju Pumped2storag e Pr oject, one of the larg est projects in China, as a case st udy. We conducted resonance check and vibr ation re2 sponse ev aluatio n o f the under gr ound power ho use, and pr oposed the v ibration2co ntro l standard values fo r Xianju pro ject. T he a2 nalysis showed that attent ion sho uld be paid to the ver tical amplitude of machine pier in structure desig n as it is slig htly lar ger than the contro l v alue. The resonance check showed that t he ov erall structure of the pow erho use and its main compo nents meet the code requirements, so the po ssibility o f under gr ound pow erhouse resonance is small. T he max imum vibrat ion displacement, velo city, and acceler atio n all meet the requir ements o f the proposed vibr ation2contr ol st andard. T he vibrat ion r oot mean squar e acceler atio n o f the co lumn str uctur e is slig ht ly larg e, but the fr equency2w eig ht ed acceleration amplitude is small, so it meets the pr oposed v ibration2co nt ro l standard. In v iew o f the situation w her e the v ibration r esponse o f some lo cal members such as the co lumn is slig htly lar ge, we discussed the effectiveness o f taking local reinfo rcement measures to r educe the intensit y o f vibr a2 tion. T his paper can pr ovide a r efer ence fo r the ant i2vibr ation o ptimizat ion desig n of similar powerho uses. 国家自然科学基金( 51379030)