横风风载对云梯消防车臂架变形及振动特征的影响分析  

Analysis of the influence of cross wind load on the deformation and vibration characteristics of the boom of the ladder fire truck

作　　者：刘洪永[1,2,3] 宋霏 李子昂 王玉珊 Liu Hongyong;Song Fei;Li Ziang;Wang Yushan(School of Safety Engineering,China University of Mining and Technology,Jiangsu Xuzhou 221116,China;Jiangsu Key Laboratory of Fire Safety in Urban Underground Space,China University of Mining and Technology,Jiangsu Xuzhou 221116,China;Key Laboratory of Gas and Fire Control for Coal Mines,China University of Mining and Technology,Jiangsu Xuzhou 221116,China;Inner Mongolia Energy Power Generation Investment Group Co.,Ltd.,Inner Mongolia Hohhot 010011,China)

机构地区：[1]中国矿业大学安全工程学院,江苏徐州221116 [2]中国矿业大学江苏省城市地下空间火灾防护重点实验室,江苏徐州221116 [3]中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室,江苏徐州221116 [4]内蒙古能源发电投资集团有限公司,内蒙古呼和浩特010011

出　　处：《消防科学与技术》2023年第11期1467-1471,共5页Fire Science and Technology

基　　金：中央高校基本科研业务费专项资金资助项目(2020ZDPYMS13)。

摘　　要：为探究横风对云梯消防车臂架的变形及振动特征的影响,采用有限元软件研究不同横风风速条件下云梯臂架的结构振动规律。臂架的风载变形主要体现在副臂在风载作用下的摆动,以偏心力矩造成的弯曲变形为主。臂架在外载荷与周期性变化的内应力共同作用下产生了低频震源,激发了臂架的低阶模态,云梯消防车臂架形变呈现出周期性振动的特征,随着风速的增加,振动幅度逐渐增大。基于该研究成果提出了一种解决方案,可为改良云梯消防车的设计提供思路。The influence of cross wind on the deformation and vibration characteristics of the boom of the ladder fire truck is explored,finite element software was used to study the structural vibration law of ultra‑high ladder boom under different wind speed conditions.The wind load deformation of the boom is mainly reflected in the swing of the auxiliary arm under the action of wind load,and the bending deformation caused by eccentric moment is mainly used.Under the combined action of external load and periodic internal stress,the boom produces a low‑frequency source that excites the low‑order mode of the boom.The deformation of the boom of the raised fire truck shows the characteristics of periodic vibration,and the vibration amplitude gradually increases with the increase of wind speed.Based on the research results,this paper proposes a solution that can provide ideas for the design of improved ladder fire trucks.

关 键 词：云梯消防车 臂架 有限元分析 横风 振动 

分 类 号：TU998.1[建筑科学—市政工程] U469.68[机械工程—车辆工程]