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| Natural Frequency Adjustment Technique of Space Truss Antenna Based on Prestressed Bar |
| Received:June 07, 2017 Revised:November 15, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2017.11.016 |
| KeyWord:truss antenna natural frequency prestress |
| Author | Institution |
| XIE Lan-chuan |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| MING Lu-yao |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| WU Yong-peng |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| ZHANG Yun |
Southwest Technology and Engineering Research Institute, Chongqing , China |
| YANG Jiu-zhou |
Southwest Technology and Engineering Research Institute, Chongqing , China |
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| Abstract: |
| Objective To study influences of prestressed bar on natural frequency of large space truss antenna and propose to adjust natural frequency of a orbiting antenna to avoid resonance. Methods The finite element model of large space truss antenna was presented and the cooling method was used to apply prestress to the truss bar. The influences of the size of prestressing force, the position of prestressed bar and the number of prestressed bars on the natural frequency of the whole structure were analyzed emphatically. Results Increasing the magnitude of prestress, arranging position of prestressed bars reasonably and increasing the number of prestressed bars could increase the change rate of natural frequencies of space truss antennas. Conclusion Reasonable optimization of prestressed bar on space truss antenna can realize real-time adjustment of low order natural frequency of space truss antenna in orbit, which can provide reference for avoidance of vibration in design of space truss antenna . |
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