【摘要】 2005年汛期黄河上游来水较好,龙羊峡水库水位持续上升,最高水位达到2597.62m。高水位期间坝体振动明显。现场振动测试数据分析表明坝体振动具有宽频特性。结合微震观测资料分析并参考机组稳定性试验成果,诊断出坝体振动主要由尾水管压力脉动引起。参考人工激振试验分析成果,认为高水位期坝体振动不会影响大坝的安全运行。更多还原

【Abstract】 Due to better incoming water in the upper reaches of the Yellow River in the flood season of 2005,the water level of Longyangxia reservoir rose continuously and its highest level reached 2597.62 m.During the high-water period,obvious vibration of dam body occurred.The analysis of the on-site vibration data showed that the dam vibration has the characteristics of wide frequency.In combination with micro seismic data analysis and in consideration of the stability test results of the generating unit,it has been diagnosed that the dam vibration is mainly caused by the pressure pulse of the draft tube.Combining with the analysis results of the manual vibration test,it is considered that dam vibration could not affect the safe operation of dam during the high water level period.更多还原