不同类型闸门模态特性对比分析  

Comparative analysis on model characteristics of different types of gates

作　　者：许中武 蔡伟[1] 金晓华 周建方[1] 宋潇 XU Zhong-wu;CAI Wei;JIN Xiao-hua;ZHOU Jian-fang;SONG Xiao(College of Mechanical and Electrical Engineering,Hohai University,Changzhou,Jiangsu 213022)

机构地区：[1]河海大学机电工程学院,江苏常州213022 [2]中国电建集团华东勘测设计研究院有限公司,浙江杭州311122

出　　处：《中国港湾建设》2022年第3期28-32,共5页China Harbour Engineering

摘　　要：为研究不同类型闸门在流固耦合作用下不同开度的自振特性及振型情况,分别以某退水闸平面工作闸门和泄洪洞弧形工作闸门为研究对象,采用有限元分析软件ANSYS建立模型并开展模态分析。结果表明:由于附加质量影响,平面闸门和弧形闸门各阶自振频率相对无水工况均有所下降,且均随启门过程逐渐增加,但随阶数变化程度相反;相对于平面闸门,弧形闸门低阶频率更接近水流脉动频率,更容易发生共振;平面闸门在门叶上下部结构易发生明显振动,弧形闸门在门叶下部结构及支臂处易发生明显振动。In order to study the natural vibration characteristics and vibration modes of different types of gates under the fluid-structure coupling effect with different openings,the plane escape gate and a radial gate in spillway tunnel are taken as the research objects,the finite element analysis software ANSYS is used to establish the modal and carry out modal analysis.The results show that due to the influence of additional mass,the natural frequencies of the plane gate and the radial gate decrease compared with the waterless condition and gradually increase with the gate opening process,but change oppositely with the modal order;the low-order frequencies of the radial gate are closer to the main frequency of the flow fluctuation resulting in high probability of resonance compared with that of the plane gate;the upper and lower structures of plane gate are easy to obviously vibrate while the lower structures and the arms of radial gate are easy to obviously vibrate.

关 键 词：平面闸门 弧形闸门 ANSYS 流固耦合 附加质量法 

分 类 号：U641.33[交通运输工程—船舶及航道工程] TV663.4[交通运输工程—船舶与海洋工程]