| 李春生*,刘人怀,王璠,郭学来,杜岳涛.大跨机库桁架屋盖结构原型动力特性的实验研究[J].实验力学,2012,27(6):650~658 |
| 大跨机库桁架屋盖结构原型动力特性的实验研究 |
| Experimental Study of Dynamic Characteristic for the Prototype Structure of a Long Span Truss Hangar Roof |
| 投稿时间：2012-06-19 修订日期：2012-07-14 |
| DOI： |
| 中文关键词: 大跨机库 多级钢桁架 动力特性 脉动测试 大跨屋盖 原型实验 |
| 英文关键词:long-span hangar multi-stage steel truss dynamic characteristic pulsation test long-span roof prototype experiment |
| 基金项目:国家自然科学基金重点项目11032005；暨南大学“211工程”三期资助项目； “工程结构故障诊断”广东省高等学校科研型重点实验室资助项目； “重大工程灾害与控制”教育部重点实验室资助项目 |
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| 中文摘要: |
| 通过对跨度为(100+150m)的机库桁架屋盖结构的现场环境激励结构动力特性测试,利用谱分析方法对实测数据进行了分析,得出了结构的自振频率和振型。采用结构分析软件Midas建立屋盖的空间模型,采用特征向量法,得到了该结构的动力固有特性。有限元计算结果与动力试验结果在前3 阶基本周期有相同的差异, 各自所对应的振型吻合较好。结果表明环境激励下识别出该屋盖的低阶模态, 可作为该机库的有限元模型修正和健康监测的基础。 |
| 英文摘要: |
| Through site environment incentive structure dynamic characteristics test for span of (100+150m) hangar roof structure，the vibration frequency and vibration mode of structure were obtained, based on the analysis of measured data by spectral analysis. Using structural analysis software Midas to build roof space model，and the structure dynamic characteristics obtained by using eigenvector method. Obtained results of finite element calculation and dynamic test in the first 3 order basic cycle have the same difference, their corresponding vibration modes are in good coincide. Results show that the environmental vibration response can identify the roof of low order mode，and can be used as foundation of hangar finite element model updating and health monitoring. |
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