• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Dynamic model updating with applications in structural and damping systems: From linear to nonlinear, from off-line to real-time.
【24h】

Dynamic model updating with applications in structural and damping systems: From linear to nonlinear, from off-line to real-time.

机译：动态模型更新在结构和阻尼系统中的应用：从线性到非线性，从离线到实时。

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

Dynamic model updating is a technique to investigate the status of a structure by using dynamic information identified from structure vibrational data. By satisfying certain cri-teria based on modal information of the structure, the dynamic properties of a mathemati-cal model can be updated to match those from the measurements of a physical specimen. Based on the purposes of model updating, the updating criteria, the complexity of the structural models to be updated, and the types of dynamic information sought, model up-dating methods can be categorized into the following: i) linear finite element (FE) model updating using modal information, ii) nonlinear FE model updating using modal informa-tion based on a linearized model under certain operation conditions, zero loading point in this study; and iii) nonlinear hysteretic model using time-series data for real-time updating.;The focus of this dissertation is to develop the above three different updating methods and demonstrate their effectiveness in corresponding updating applications. Both linear and nonlinear hysteretic models are considered in the study. Numerical simulations are carried out for all the three model updating techniques to demonstrate the performance and efficacy of the updating techniques developed. Two sets of experiments are con-ducted, one set contains real-time updating tests on magnetorheological (MR) dampers and another set contains quasistatic cyclic tests and real-time updating tests using shake table on a steel shear building. The real-time feature is achieved by the latest high per-formance host-target environment enabled by xPC Target(TM), a product from MATH-WORKSRTM. In addition to the development of the model updating techniques, a power supply unit model and a nonlinear hysteresis model modified from Bouc-Wen model are proposed and successfully applied in the experimental study. The study conducted herein demonstrates that the model updating techniques developed can be effectively applied to various updating scenarios. The developed nonlinear hysteretic model updating technique is able to achieve "hard" real-time functionality, which can provide the most up-to-date information of the structural model. This technique also requires minimal data-buffer, and has potential to have a significant impact on nonlinear structural control applications.
机译：动态模型更新是一种通过使用从结构振动数据中识别出的动态信息来调查结构状态的技术。通过基于结构的模态信息满足某些标准，可以更新数学模型的动态特性，以匹配物理样品的测量结果。基于模型更新的目的，更新标准，要更新的结构模型的复杂性以及所寻求的动态信息的类型，模型更新方法可分为以下几种：i）线性有限元（FE）使用模态信息进行模型更新； ii）在某些工作条件下，零载荷点下，基于线性化模型的基于模态信息的非线性有限元模型更新； （3）利用时间序列数据进行实时更新的非线性滞后模型。本文的重点是开发上述三种不同的更新方法，并说明它们在相应更新应用中的有效性。研究中考虑了线性和非线性滞后模型。对所有三种模型更新技术进行了数值模拟，以证明所开发的更新技术的性能和有效性。进行了两组实验，一组包含磁流变（MR）阻尼器的实时更新测试，另一组包含准静态循环测试和在钢剪建筑上使用振动台的实时更新测试。实时功能是通过MATH-WORKSRTM的产品xPC TargetTM支持的最新高性能主机目标环境实现的。除了开发模型更新技术外，还提出了从Bouc-Wen模型修改而来的电源单元模型和非线性磁滞模型，并将其成功地应用于实验研究中。本文进行的研究表明，开发的模型更新技术可以有效地应用于各种更新方案。所开发的非线性滞后模型更新技术能够实现“硬”实时功能，从而可以提供结构模型的最新信息。该技术还需要最少的数据缓冲区，并且有可能对非线性结构控制应用产生重大影响。

著录项

  • 作者

    Song, Wei.;

  • 作者单位

    Purdue University.;

  • 授予单位 Purdue University.;
  • 学科 Engineering Civil.;Engineering Mechanical.
  • 学位 Ph.D.
  • 年度 2011
  • 页码 421 p.
  • 总页数 421
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 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