装配式钢桁架桥振动模态分析与试验研究
刘宇晨,刘安心,何晓晖,曾繁琦
(解放军理工大学 野战工程学院,江苏 南京 210007)
摘要:桥梁结构的动力学特性是其结构分析与优化设计的基础,以某型装配式钢桁架桥为研究对象,利用有限元软件ANSYS建立了该桥的三维空间有限元分析模型,并采用分块兰索斯法对其进行了模态分析,得到了桥梁的10阶固有频率和振型,而后基于环境激励的工作模态试验方法开展试验研究,通过试验数据的对比,验证了该分析方法的可靠性,为该型钢桁架桥的动力特性分析提供了直接的数据支持。
关键词:钢桁架桥;有限元;模态分析;模态试验
中图分类号:U448 文献标志码:A doi:10.3969/j.issn.1006-0316.2014.09.007
文章编号:1006-0316 (2014) 09-0025-05
The vibration modal analysis and experiment of prefabricated steel truss bridge
LIU Yu-chen,LIU An-xin,HE Xiao-hui,ZENG Fan-qi
( College of Field Engineering, PLA University of Science and Technology, Nanjing 210007, China )
Abstract:The dynamic characteristics of bridges are the basis of structural analysis and optimization design, this paper set the prefabricated steel truss bridge as study focus, using ANSYS to establish the three-dimensional space finite element model of steel truss bridge, and carried out modal analysis using Block Lanczos method, ten mode natural frequencies and vibrations were obtained, then we conducted modal experiments using operating modal analysis method based on ambient excitation and compared the test data, through which validated the reliability of the analysis method of this paper, which offered direct data support to the dynamic analysis of prefabricated steel truss bridge.
Key words:steel truss bridge;finite element;modal analysis;modal experiment
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收稿日期:2014-04-15
作者简介:刘宇晨(1990-),男,湖南常德人,硕士研究生,主要研究方向为装备技术与应用;刘安心(1967-),男,安徽宣城人,博士生导师,教授,主要研究方向为机械设计及理论和机器人机构学等。
 

 

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