[关键词]
[摘要]
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。
[Key word]
[Abstract]
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.
[中图分类号]
[基金项目]
国家自然科学基金( 51379030)