| 复合夹层结构频率及损耗因子的计算 |
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| 引用本文： | 任志刚,卢哲安,楼梦麟.复合夹层结构频率及损耗因子的计算[J].地震工程与工程振动,2004,24(2):101-106. |
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| 作者姓名： | 任志刚 卢哲安 楼梦麟 |
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| 作者单位： | 武汉理工大学,交通工程研究所,湖北,武汉,430070;同济大学,土木工程防灾国家重点实验室,上海,200092 |
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| 基金项目： | 湖北省科技攻关项目(2003g10042) |
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| 摘 要： | 频率和损耗因子是粘弹性材料复合夹层结构的两个重要的动力特性指标。本文采用复模量模型模拟夹层粘弹性材料特性的频率相关性，并基于大型通用有限元程序NASTRAN，提出采用模态应变能迭代法及复特征值迭代法求解复合夹层结构的各阶频率及损耗因子。该方法可以应用到大型复杂复合夹层结构中去，具有很好的实用性和较好的准确性。以复合夹层梁为例，进行了理论解析解和数值解的对比研究和优化设计分析。
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| 关 键 词： | 粘弹性材料 夹层结构 复模量模型 频率 损耗因子 |
| 文章编号： | 1000-1301(2004)02-0101-06 |
Calculation of frequency and loss factor of composite sandwich structures |
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| REN Zhi-gang.Calculation of frequency and loss factor of composite sandwich structures[J].Earthquake Engineering and Engineering Vibration,2004,24(2):101-106. |
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| Authors: | REN Zhi-gang |
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| Institution: | REN Zhi-gang~ |
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| Abstract: | Frequency and loss factor are two important indices of dynamic property of composite structures,in which the viscoelastic material is sandwiched between the upper layer and the lower layer. In this paper, we describe the frequency-dependent property of viscoelastic materials using complex modulus model, and based on NASTRAN, iterative modal strain energy method and iterative complex eigenvalue method are presented to solve the frequency and loss factor of sandwich structures. These two methods are effective and exact for the large-scale complex composite sandwich structures. As an example of sandwich beams, theoretical closed-form solution and numerical solution are studied comparatively, and an optimization analysis is conducted. |
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| Keywords: | viscoelastic material sandwich structures complex modulus model frequency loss factor |
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