| 带阻尼失谐周期多跨连续梁的振动局部化问题 |
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| 引用本文： | 王晶,于桂兰. 带阻尼失谐周期多跨连续梁的振动局部化问题[J]. 北京交通大学学报(自然科学版), 2009, 33(4) |
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| 作者姓名： | 王晶 于桂兰 |
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| 作者单位： | 北京交通大学,土木建筑工程学院,北京,100044;北京交通大学,土木建筑工程学院,北京,100044 |
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| 基金项目： | 国家自然科学基金资助项目(10632020) |
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| 摘 要： | 利用传递矩阵法分析研究了带阻尼失谐周期多跨梁中的振动局部化现象,将阻尼和失谐对于近周期结构的动力性能的影响进行了比较,并分析了两者同时存在时引起的综合效应与它们各自的影响之间的关系.结果表明:在无阻尼周期结构中处于"通频"范围内的振动能够传遍整个结构而不会发生衰减,但当结构中存在阻尼或失谐时,同样的振动在传播过程中将会发生指数衰减.
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| 关 键 词： | 连续梁 周期结构 传递矩阵 振动局部化 阻尼 |
Vibration Localization in Disordered Periodic Multi-Span Beams with Damping |
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| WANG Jing,YU Guilan. Vibration Localization in Disordered Periodic Multi-Span Beams with Damping[J]. JOURNAL OF BEIJING JIAOTONG UNIVERSITY, 2009, 33(4) |
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| Authors: | WANG Jing YU Guilan |
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| Affiliation: | School of Civil Engineering;Beijing Jiaotong University;Beijing 100044;China |
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| Abstract: | There are many practical applications of periodic multi-span beams in engineering.It is very important to analyze the propagation of vibrations in disordered periodic structures.Since there exists damping in practical structures,vibration localization in disordered continuous beams with damping is presented in this paper by using transfer matrix method.The results show that both harmonic waves and normal modes of vibration that extend throughout the ordered,undamped beams become spatially attenuated if eith... |
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| Keywords: | continuous beams periodic structure transfer matrix vibration localization damping |
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