| 边界元法分析回转体的自由扭振问题 |
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| 引用本文： | 王秀喜,陈锋,吴杰.边界元法分析回转体的自由扭振问题[J].航空学报,1989,10(3):187-191. |
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| 作者姓名： | 王秀喜 陈锋 吴杰 |
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| 作者单位： | 中国科学技术大学
(王秀喜，陈锋)，中国科学技术大学(吴杰) |
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| 摘 要： | 边界元法用于分析非线性问题和动力问题时,在最终得到的积分方程中同时包含边界积分和区域积分。通常的做法是对区域积分项采用常值有限元离散,这需要用很密的网格才能达到较高的精度。
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| 关 键 词： | 边界无法 自由振动 回转体 凝聚 |
| 收稿时间： | 1987-10-14; |
BOUNDARY ELEMENT ANAIYSIS FOR TORSIONAL FREE VIBRATION OF REVOLUTION BODIES |
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| University of science and Technology of China Wang Xiuxi,Chen Feng and Wu Jie.BOUNDARY ELEMENT ANAIYSIS FOR TORSIONAL FREE VIBRATION OF REVOLUTION BODIES[J].Acta Aeronautica et Astronautica Sinica,1989,10(3):187-191. |
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| Authors: | University of science and Technology of China Wang Xiuxi Chen Feng and Wu Jie |
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| Institution: | University of science and Technology of China |
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| Abstract: | In this paper the boundary integral equation for torsio-nal free vibration problem of revolution bodies is derived. The boundary integral term in the equation is discretized with linear interpolation boundary elements and the domain integral term with 8 nodeSerendipity finite elements. The equation is condensed by taking thefinite element nodes as master degrees of freedom and a generalized eigenvalue problem with a few degrees of freedom is established. Typical examples are studied. The numerical results show that higher accuracy could be obtained and fewer degrees of freedom are needed by using Serendipity elements than constant value elements. Results are remarkably improved as meshes refined. Computations are reduced due to condensation. |
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| Keywords: | boundary element method free vibration revolution bodies condensation |
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