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带阻尼失谐周期多跨连续梁的振动局部化问题
  • ISSN号：1673-0291
  • 期刊名称：《北京交通大学学报：自然科学版》
  • 时间：0
  • 分类：TU375.1[建筑科学—结构工程] O327[理学—一般力学与力学基础;理学—力学]
  • 作者机构：[1]北京交通大学土木建筑工程学院,北京100044
  • 相关基金：国家自然科学基金资助项目（10632020）
作者： 王晶[1], 于桂兰[1]
关键词： 连续梁, 周期结构, 传递矩阵, 振动局部化, 阻尼, continuous beams, periodic structure, transfer matrix, vibration localization, damping
中文摘要：

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．

英文摘要：

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 either small damping or small disorder is introduced in the system. The effects of disorder and/or damping on the dynamics of the periodic multi-span beams are also discussed in detail.

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期刊信息
  • 《北京交通大学学报：自然科学版》
  • 北大核心期刊（2011版）
  • 主管单位:教育部
  • 主办单位:北京交通大学
  • 主编：孙守光
  • 地址：北京市西直门外上园村3号北方交通大学8楼8101室
  • 邮编：100044
  • 邮箱：bfxb@bjtu.edu.cn
  • 电话：010-51688053
  • 国际标准刊号：ISSN：1673-0291
  • 国内统一刊号：ISSN：11-5258/U
  • 邮发代号:
  • 获奖情况:
  • 1995年铁道部科技期刊一等奖、1999年教育部组织的...
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  • 被引量:5152