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| 一类含间隙结构振动特性分析 | |
| 引用本文： | 肖世富,陈滨,杜强,莫军. 一类含间隙结构振动特性分析[J]. 动力学与控制学报, 2003, 1(1): 35-40 |
| 作者姓名： | 肖世富 陈滨 杜强 莫军 |
| 作者单位： | 1. 中国工程物理研究院结构力学研究所,绵阳,621900;北京大学力学与工程科学系,北京,100871 2. 北京大学力学与工程科学系,北京,100871 3. 中国工程物理研究院结构力学研究所,绵阳,621900 |
| 基金项目： | 国家自然科学基金(10272002)，教育部博士点基金(20020001032).~~ |
| 摘 要： | 为分析一类含间隙结构的振动特性及为保护特定子结构而预留间隙的合理性,根据其振动试验结果,采用假设模态法的思想,将该类带间隙的非线性结构按其子结构的一阶弯曲模态简化为带间隙的单自由度与二自由度弹簧-质量系统,分析了不同激励条件下间隙对系统动力学响应的影响.分析结果表明:此类结构中,间隙具有阻碍振动传递的性质,预留间隙是合理的. |
| 关 键 词： | 间隙 假设模态法 固有频率 主共振 超谐共振 |
| 收稿时间： | 2003-08-01 |
| 修稿时间： | 2003-08-01 |
Vibration characteristics of the structure with clearances |
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| Xiao Shifu,Chen Bin,Du Qiang and Mo Jun. Vibration characteristics of the structure with clearances[J]. Journal of Dynamics and Control, 2003, 1(1): 35-40 | |
| Authors: | Xiao Shifu Chen Bin Du Qiang Mo Jun |
| Abstract: | For analyzing the vibration characteristics of a kind of structure with clearances,and for discussing the rationality of pre-keeping clearances in protecting the special substructure,we reduce the nonlinear structure with clearances to 1-DOF system with clearances and 2-DOF system with clearances,by adopting the mass and the first-order bending stiffness of its substructures on the basis of Assumption Modal Method and its vibration results.We analyze the effect of the clearness on the response of the system under different exciting conditions.The results indicate that the clearances can hold back the transfer of the vibration and it is rational to pre-keep the clearances in the system. |
| Keywords: | clearance assumption modal method nature frequency resonance super-harmonic resonance |
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