| 失调耦合梁的模态局部化和频率轨迹转向现象 |
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| 引用本文： | 徐伟华,吕中荣,刘济科. 失调耦合梁的模态局部化和频率轨迹转向现象[J]. 中山大学学报(自然科学版), 2007, 46(4): 9-12,20 |
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| 作者姓名： | 徐伟华 吕中荣 刘济科 |
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| 作者单位： | 中山大学应用力学与工程系 广东广州510275 |
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| 基金项目： | 教育部高等学校博士学科点专项科研基金;中山大学校科研和教改项目 |
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| 摘 要： | 用有限元分析方法研究了由横向和扭转弹簧耦合的两条欧拉-伯努利梁在引入了物理参数(如杨氏模量)的不对称小失调后产生的模态局部化和频率轨迹转向现象,同时也研究了由于弹性支承的失调而产生的振动模态局部化现象。研究表明弱耦合系统的不对称失调会导致模态局部化和频率轨迹转向现象的出现。
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| 关 键 词： | 有限元 耦合梁 失调 模态局部化 |
| 文章编号： | 0529-6579（2007）04-0009-05 |
| 修稿时间： | 2006-12-18 |
Mode Localization and Frequency Loci Veering in a Disordered Coupled Beam System |
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| XU Wei-hua,L Zhong-rong,LIU Ji-ke. Mode Localization and Frequency Loci Veering in a Disordered Coupled Beam System[J]. Acta Scientiarum Naturalium Universitatis Sunyatseni, 2007, 46(4): 9-12,20 |
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| Authors: | XU Wei-hua L Zhong-rong LIU Ji-ke |
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| Affiliation: | Department of Applied Mechanics and Engineering,Sun Yat-sen University,Guangzhou 510275,China |
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| Abstract: | Vibration mode localization and frequency loci veering in disordered coupled beam system,such as two beams coupled with transverse and rotational springs,are studied using finite element analysis.Small disorders in the physical parameters such as Young's modulus are introduced in the investigation of the mode localization and frequency loci veering phenomena.The effect of disorder in the elastic support on the mode localization phenomenon is also discussed.It is found that an asymmetric disorder in the weakly coupled system will lead to the occurrence of mode localization and frequency loci phenomena. |
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| Keywords: | finite element coupled beam disorder mode localization |
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