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| Dynamics characteristic analysis of space frame structure based on spectral element method |
| Received:May 10, 2015 Revised:September 07, 2015 |
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| DOI：10.7511/jslx201605023 |
| KeyWord:spectral element method space frame structure natural frequencies harmonic response transient response |
| Author | Institution |
| 鄂林中阳 |
中国工程物理研究院 总体工程研究所, 绵阳 |
| 杜强 |
中国工程物理研究院 总体工程研究所, 绵阳 |
| 李上明 |
中国工程物理研究院 总体工程研究所, 绵阳 |
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| Abstract: |
| Treating space frame structure as research object,spectral element method (SEM) was applied to analyze dynamics characteristics.We could derive dynamic stiffness matrices of bar,shift and Timoshenko-beam.And then,dynamic stiffness matrix of space frame structure and theory formula of frequency domain response were established.The application field of SEM was expanded.Based on programming and computing,natural frequencies of space frame and harmonic response of any point were calculated and compared with the result of FEM.Transient responses were further calculated with load.In the frame structure dynamics analysis,research shows SEM is more accurate and effective than FEM,and is better suited to solve the problem of high-frequency vibrations. |