• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Active control of a cable-stayed bridge against earthquake excitations.
【24h】

Active control of a cable-stayed bridge against earthquake excitations.

机译：主动控制斜拉桥抗地震激励。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This thesis focuses on the structural control of the cable-stayed bridge under construction at Cape Girardeau, Missouri, spanning the Mississippi River and connecting the states of Missouri and Illinois. The proximity of the bridge site to the New Madrid seismic zone makes the protection of the bridge from seismically generated forces of interest.; Three controllers were designed for the bridge, based on LQG, H 2, and μ-synthesis methods and evaluated using a 419 degree-of-freedom finite element model of the structure. The model utilized only truss and beam finite elements, and employed kinematic constraints and condensation techniques to achieve reasonable dimension.; The design model was further reduced in dimension by considering only those states of the evaluation model with the largest controllability and observability Grammians.; The performance of the LQG- and H2-based controllers was less than satisfactory, in the sense that the performance was not as good for the evaluation model as it was for the design model. The controller designed with μ-tools, on the other hand, was robust, and the resulting evaluation criteria were better than those of the LQG and H2 designs. A stiffness perturbation analysis was also completed. The time and frequency responses showed no signs of instability for perturbations of ±7%. Therefore, it was concluded that the μ-tools-based controller would perform well.
机译：本文主要研究密苏里州吉拉多角（Cape Girardeau）正在建设中的斜拉桥的结构控制，该斜拉桥横跨密西西比河并连接密苏里州和伊利诺伊州。桥梁位置靠近新马德里地震带，可以保护桥梁免受地震产生的关注力的影响。基于LQG，H 2 和μ合成方法，为桥梁设计了三个控制器，并使用结构的419自由度有限元模型对其进行了评估。该模型仅利用桁架和梁的有限元，并采用运动学约束和冷凝技术来获得合理的尺寸。通过仅考虑具有最大可控性和可观察性的语法的评估模型的那些状态，进一步减小了设计模型的尺寸。基于LQG和H 2 的控制器的性能不尽人意，从某种意义上说，评估模型的性能不如设计模型好。另一方面，使用μ工具设计的控制器具有鲁棒性，其评估标准优于LQG和H 2 设计。刚度扰动分析也已完成。时间和频率响应对±7％的扰动没有显示不稳定的迹象。因此，可以得出结论，基于μ工具的控制器将表现良好。

著录项

  • 作者

    Turan, Gursoy.;

  • 作者单位

    University of Illinois at Urbana-Champaign.;

  • 授予单位 University of Illinois at Urbana-Champaign.;
  • 学科 Engineering Civil.
  • 学位 Ph.D.
  • 年度 2001
  • 页码 160 p.
  • 总页数 160
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号