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论文:2014,Vol:32,Issue(6):950-955 |
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引用本文： |
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蔡婷, 张洵安. 基于DMF研究地震作用下MSCSS的控制特性[J]. 西北工业大学学报 |
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Cai Ting, Zhang Xun'an. Exploring Control Characteristics of Mega-Sub ControlledStructural System(MSCSS) under Earthquake Excitation Based onDynamic Magnification Factor(DMF)[J]. Northwestern polytechnical university |
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| 基于DMF研究地震作用下MSCSS的控制特性 |
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| 蔡婷, 张洵安 |
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| 西北工业大学 力学与土木建筑学院, 陕西 西安 710129 |
| 摘要: |
| 通过对巨子型结构体系(mega-sub controlled structure system,即MSCSS)的动力学方程进行推导,利用拉氏变换得到系统的传递函数,进一步表示出该新型控制结构体系在地震作用下所特有的位移动力放大系数(dynamic magnification factor,即DMF)表达式,以DMF为指标从理论层面揭示MSCSS的频域控制特性及动力响应特征。通过算例基于DMF分析主结构与子结构的参数(质量比、刚度比、附加阻尼比)设置对MSCSS调谐减震性能的影响,为建构不同层数MSCSS及合理的实体模型提供理论依据。 |
| 关键词:
控制
阻尼
动力响应
动力学
地震作用
运动方程
频域分析
拉氏变换
矩阵代数
参数化抗震性能
刚度矩阵
振动分析
巨子型结构体系
动力放大系数
参数设置
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| Exploring Control Characteristics of Mega-Sub ControlledStructural System(MSCSS) under Earthquake Excitation Based onDynamic Magnification Factor(DMF) |
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| Cai Ting, Zhang Xun'an |
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| Department of Civil Engineering, Northwestern Polytechnical University, Xi'an 710129, China |
| Abstract: |
| We deduce the dynamic equation of the mega-sub controlled structural system(MSCSS) and use thetransfer function derived through the Laplace transform to obtain the expression of the dynamic magnification factor(DMF) that represents the displacement typical of the MSCSS.Theoretically, we use the DMF as an indicator to re-veal the frequency domain control characteristics of the MSCSS and its dynamic response.The results of numerical a-nalysis based on the DMF, given in Figs.1 through 6, and their analysis show preliminarily that different settings ofparameters such as the mass ratio, stiffness ratio and additional damping ratio of the MSCSS under earthquake exci-tation have different effects on its tuned vibration absorption performance.The exploration results provide theoreticalbases for setting the parameters of the MSCSS with different layers and establishing its reasonable physical model. |
| Key words:
control
damping
dynamic response
dynamics
earthquakes
equations of motion
frequency domain a-nalysis
Laplace transforms
matrix algebra
parameterization
seismic response
stiffness matrix
vibration analysis
mega-sub controlled structural system (MSCSS)
dynamic magnification factor(DMF)
parameter setting
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| 收稿日期: 2014-04-28
修回日期:
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| DOI: |
| 基金项目: 国家自然科学基金(51308458);教育部博士点基金(20096102110018);西北工业大学基础研究基金(3102014JCQ01042)资助 |
| 通讯作者:
Email： |
| 作者简介: 蔡婷(1984-)，女，西北工业大学博士研究生，主要从事结构振动控制研究。
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| 蔡婷 在本刊中的所有文章 |
| 张洵安 在本刊中的所有文章 |
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