泄洪条件下升船机塔柱结构振动特性监测分析  

Monitoring and analysis of vibration characteristics of ship lift tower structure under flood discharge condition

作　　者：江敏敏 欧阳金惠 钱军 李茂林 许亮华[3] JIANG Minmin;OUYANG Jinhui;QIAN Jun;LI Maolin;XU Lianghua(China Yangtze Three Gorges Group Co.,Ltd,Wuhan 430010,China;China Yangtze Power Co.,Ltd,Yichang 443001,China;China Instiute of Water Resources and Hydropower Research,Bejing 100048,China)

机构地区：[1]中国长江三峡集团有限公司,湖北武汉430010 [2]中国长江电力股份有限公司,湖北宜昌443001 [3]中国水利水电科学研究院,北京100048

出　　处：《中国水利水电科学研究院学报(中英文)》2025年第2期154-162,共9页Journal of China Institute of Water Resources and Hydropower Research

基　　金：中国长江电力股份有限公司(4223020062)。

摘　　要：汛期受大坝泄洪影响,升船机塔柱结构会产生明显的振动响应。本文利用汛期监测得到的某升船机塔柱振动响应数据进行分析,研究发现汛期泄洪对升船机区域产生的气压脉动激励的卓越频带为0.3~11 Hz,主要呈现为2 Hz以下低频窄带随机响应特征;模态分析表明该升船机塔柱结构的前两阶固有模态振型主要体现为塔柱结构的横河向水平晃动(0.96 Hz)和顺河向水平晃动(2.92 Hz);由于泄洪产生的气压脉动激励能量主频主要分布在低频段,可激起升船机塔柱结构的低阶模态特性,使升船机塔柱结构产生低频振动响应;不同泄洪工况下的数据统计对比表明,泄洪闸门调度方式调整对泄洪气压脉动特征会产生明显影响,利用泄洪闸门调度可改变泄洪对升船机塔柱结构的振动影响。Affected by the flood discharge of the dam during the flood season,the tower structure of the ship lift will have an obvious response to vibration.In this paper,the vibration response data of a ship lift tower obtained by flood season monitoring are analyzed.It is found that the predominant frequency band of the pressure pulsation excitation in the ship lift area caused by flood discharge in the flood season is 0.3~11 Hz,which is mainly characterized by lowfrequency and narrow-band random response below 2 Hz.The modal analysis shows that the first two natural modal shapes of the ship lift tower structure are mainly reflected in the horizontal sloshing of the tower structure (0.96 Hz) and the horizontal sloshing along the river (2.92 Hz).Since the main frequency of the pressure pulsation excitation energy generated by the flood discharge is mainly distributed in the low frequency band,the low-order modal characteristics of the ship lift tower structure are displayed,so that the ship lift tower structure has a low-frequency response to the vibration.The statistical comparison of data under different flood discharge conditions shows that the adjustment of flood discharge gate operation mode will have a significant impact on the characteristics of flood discharge pressure pulsation.The reasonable use of flood discharge gate operation mode can change the vibration effect of flood discharge on the tower structure of the ship lift.

关 键 词：升船机塔柱 气压脉动 泄洪振动 振动特性 模态分析 

分 类 号：U642[交通运输工程—船舶及航道工程]