摘要
为预测葛洲坝工程二江泄水闸弧形闸门在淹没水跃作用下的振动响应,先后做了闸门水跃荷载及动态特性两个室内模型试验,预测闸门是安全的。在工程竣工后,作了原型观测,证实了这一论断。研究表明:(1)总水跃荷载均方根不超过设计静荷载的5％;(2)振幅响应均方根为0.05mm;(3)荷载主频率远低于闸门基频,动力放大系数可取为1。
To predict the vibration response of the tainter gates of the Second Channel Spillway in Gezhouba Project under the action of submerged hydraulic jump, two laboratory model expariments, hydraulic and structural, were successfully completed. In addition , field observations were conducted immediately after the project was completed. The results showed:(1) The statistic standard deviation of the hydraulic jump load is about 1 900kN , less than five percent of the design static load.(2) Under the action of hydraulic jump , the standard deviation of the amplitude response mea sured equals 0. 05mm .(3) For the main band frequency of the hydraulic jump load being much lower than the natural frequency of the gate , the dynamic magnification factor approximates to 1.
出处
《长江科学院院报》
CSCD
北大核心
1993年第3期62-67,共6页
Journal of Changjiang River Scientific Research Institute
关键词
弧形闸门
泄水闸
振动
tainter gates
hydraulic jump load
dymamic properties
vibration response
