| 旋转厚圆柱壳振动特性分析 |
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| 引用本文： | 郭丹,褚福磊,郑兆昌.旋转厚圆柱壳振动特性分析[J].清华大学学报(自然科学版),2001,41(2):56-59. |
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| 作者姓名： | 郭丹 褚福磊 郑兆昌 |
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| 作者单位： | 1. 清华大学 精密仪器与机械学系,
2. 清华大学 工程力学系, |
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| 基金项目： | 国家自然科学基金重大资助项目!(19990 5 10 )，国家重点基础研究专项经费! (G19980 2 0 316 ) |
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| 摘 要： | 为研究旋转厚圆柱壳的动力特性 ,采用九结点退化壳体单元有限元法 ,对于壳体达到平衡位置以前的状态 ,采用非线性板壳理论求解 ,然后采用线性理论研究圆柱壳的动力特性。模型中考虑了科氏加速度 ,离心力 ,初应力的影响。分析结果显示旋转厚圆柱壳具有复杂的三维模态 ,旋转速度对不同模态的固有频率的影响不同。该研究为高速离心机、航空发动机等旋转机械中的圆柱壳结构的设计和故障诊断提供了理论依据和分析方法
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| 关 键 词： | 旋转圆柱壳 三维模态 有限元法 固有特性 |
| 文章编号： | 1000-0054(2001)02-0056-04 |
| 修稿时间： | 2000年1月18日 |
Vibration of thick rotating cylindrical shells |
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| GUO Dan ,CHU Fulei ,ZHENG Zhaochang.Vibration of thick rotating cylindrical shells[J].Journal of Tsinghua University(Science and Technology),2001,41(2):56-59. |
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| Authors: | GUO Dan CHU Fulei ZHENG Zhaochang |
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| Institution: | GUO Dan 1,CHU Fulei 1,ZHENG Zhaochang 2 |
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| Abstract: | The effect of the rotational speed on the vibration characteristics of a thick cylindrical shell was investigated using a nine node super parametric finite element with shear and axial deformation to study the dynamic performance of the rotating cylindrical shell. Nonlinear plate shell theory for large deflections was used to analyze the deformation before the cylindrical shell reaches the equilibrium position. Then linear theory was used to analyze the vibration of the shell. The effects of Coriolis acceleration, centrifugal force, initial tension and geometric nonlinearities due to the large deformation were considered in the model. The results showed that the rotating thick cylindrical shell has complicated three dimension modes. The effects of the rotational speed on the natural frequency for different modes are different. The results provide a theoretical basis and an analytical method for structure design and fault analysis of rotating machinery. |
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| Keywords: | rotating cylindrical shell three dimension mode finite element method natural characteristic |
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