抽水蓄能电站拦污栅结构振动特性模型试验研究  

Experimental study of the free vibration characteristics of the trashrack of the Tianhuangping pumped storage station

作　　者：王光纶[1] 张文翠[1] 李未显[1] 

机构地区：[1]清华大学水利水电工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2001年第2期114-118,共5页Journal of Tsinghua University(Science and Technology)

摘　　要：结合天荒坪抽水蓄能电站尾水拦污栅流激振动试验 ,研究了拦污栅自振特性。对栅架整体结构模型的自振频率和振型进行了量测 ,并与数值计算结果作了对比 ,二者基本吻合 ,说明成果是可靠的 ;此外 ,还对栅架支承条件对拦污栅自振频率的影响以及单根栅条的自振频率特性进行了探讨。依据对单根栅条模型试验的结果 ,文中对 L evin建议的计算栅条自振频率公式的适用性提出了质疑 。The free vibration characteristics of the trashrack structures, including the whole structure model and the single rack bars, are studied as part of flow induced vibration studies of the trashrack of the Tianhuangping pumped storage station. The calculated free vibration frequencies and mode shapes of the whole structural model compare well with measured values. The influences of the various supporting conditions upon the frequencies of the trashrack and the free vibration characteristics of the single rack bars were then studied. The experimental data obtained from tests of the single rack bars were used to approoch the applicability of the formulation proposed by Levin to calculate the vibration frequencies of rack bars. Finally, a new explanation is presented for the inducement of resonance in the rack bars.

关 键 词：抽水蓄能 拦污栅 自振频率 栅条 共振 电站 引水口 

分 类 号：TV732.2[水利工程—水利水电工程] TV743