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.
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)
出处
《价值工程》
2024年第24期43-46,共4页
Value Engineering
关键词
桥梁振动
模态分析
特征频率
质量因子
bridge vibration
mode analysis
characteristic frequency
mass factor
作者简介
罗韬(1988-),男,湖南邵阳人,工程师,本科,现从事公路桥梁施工研究。
