Abstract
In order to grasp the wind-induced dynamic characteristics of large antenna structures, a 110m fully steerable radio telescope to be built is used as a study platform and selected as the research object for various kinds of upwind profiles. Based on the wind tunnel test results of a rigid model, wind distribution characteristics of the reflector and the unfavorable wind angle are analyzed and discussed. On this basis, the nonlinear time-history method based on random vibration is used further analyze the wind-induced dynamic characteristics of the structure, and the wind vibration response features are summarized. The results indicate that the structure has a dense natural frequency distribution and is more flexible. Its wind vibration response is a narrow-band process. As elevation gradually increases, not only does the vibration energy increase, but the higher modes also contribute progressively to wind-induced vibration. The achievements above provide a more comprehensive wind load value reference for the telescope structure in its wind force proofing design.
| Original language | English |
|---|---|
| Pages (from-to) | 459-465 |
| Number of pages | 7 |
| Journal | Zhendong Ceshi Yu Zhenduan/Journal of Vibration, Measurement and Diagnosis |
| Volume | 36 |
| Issue number | 3 |
| DOIs | |
| State | Published - 1 Jun 2016 |
| Externally published | Yes |
Keywords
- Antenna structure
- Natural frequency
- Rigid model
- Wind force proofing design
- Wind-induced response
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