云山大桥振动模态与特征频率分析研究  

Analysis on Vibration Mode and Characteristic Frequency of Yunshan Bridge

作　　者：罗韬 张勇 胡彬 梁为群 刘晶晶 许维勤 梁为柯 LUO Tao;ZHANG Yong;HU Bin;LIANG Wei-qun;LIU Jing-jing;XU Wei-qin;LIANG Wei-ke(CCCC First Highway Engineering Co.,Ltd.,Beijing 100024,China;Hunan Baoyilong Construction Labor Service Co.,Ltd.,Changsha 410221,China;Henan Zhenxiang Road and Bridge Technology Co.,Ltd.,Zhengzhou 450199,China;Guangdong Zhongqi Construction Supervision Co.,Ltd.,Zhongshan 528400,China;Hunan China Network Zhilian Communications Co.,Ltd.,Changsha 410000,China;Fangchenggang Medical Security Service Center,Fangchenggang 538021,China;Guigang Talent Reserve Center in Shortage,Guigang 537000,China)

机构地区：[1]中交一公局集团有限公司,北京100024 [2]湖南宝亿隆建筑劳务有限责任公司,长沙410221 [3]河南省祯祥路桥科技有限公司,郑州450199 [4]广东中琦建设监理有限公司,中山528400 [5]湖南中网智联通信有限公司,长沙410000 [6]防城港市医疗保障服务中心,防城港538021 [7]贵港市紧缺人才储备中心,贵港537000

出　　处：《价值工程》2024年第24期43-46,共4页Value Engineering

摘　　要：针对云山大桥振动的振动模态和特征频率,本文采用COMSOL软件建模分析。结果显示:(1)桥梁在不同特征频率下呈现多样振动模态,包括竖直上下摆动和水平摆动等。(2)桥梁端部固定状态对特征频率影响明显,由大到小排序:两端固定、一端固定一端自由、两端自由。(3)弹簧基座刚度越大,特征频率越高,反映出约束增加导致整体稳定性提高。(4)材料密度增加导致特征频率降低,质量因子随振动阶数增加而增大。For the vibration mode and characteristic frequency of Yunshan Bridge,COMSOL software is used for modeling analysis.The results show that:①the bridge presents various vibration modes at different characteristic frequencies,including vertical swing up and down swing,etc.②The fixed state of the end of the bridge has an obvious influence on the characteristic frequency,from large to small:both ends are fixed,one end is free,and the two ends are free.③The greater the stiffness of the spring base,the higher the feature frequency,reflecting the increased overall stability caused by the increased constraint.④The increase of material density leads to the decrease of characteristic frequency,and the mass factor increases with the increase of vibration order.

关 键 词：桥梁振动 模态分析 特征频率 质量因子 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]