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大型射电望远镜舱索结构变形模型与原型的相似性

仇原鹰;段宝岩;盛英;黄一红   

  1. (西安电子科技大学 机电工程学院, 陕西 西安 710071)

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2004-08-20 发布日期:2004-08-20

Similarity between the distorted model and the prototype of the large radio telescope

QIU Yuan-ying;DUAN Bao-yan;SHENG Ying;HUANG Yi-hong

  

  1. (School of Mechano-electronic Engineering, Xidian Univ., Xi'an 710071, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2004-08-20 Published:2004-08-20

摘要: 建立了大型射电望远镜舱索结构的运动微分方程,并由此研究了模型与原型的相似条件.针对模型存在几何变形的特殊问题,从主要动力相似条件出发,导出了用已知几何比尺表示的频率比尺、风速比尺等典型相似性常数.进一步,基于模型振动实验和相似性分析,预测了原型的固有频率和随机风振幅值,预测结论与非线性有限元动力仿真结果吻合.

关键词: 大型射电望远镜, 悬索舱体结构, 变形模型

Abstract: The dynamic differential equations for suspended cabin-cable structure of the large radio telescope are given, with the similarity conditions between the distorted model and the prototype obtained from the equations. Furthermore some typical scale factors such as the frequency scale factor, wind velocity scale factor, an mass scale factor are described by the known geometrical scale factors utilizing the essential dynamic similarity conditions. Based on the similarity analysis and the vibration experiments on the model, the natural frequencies and amplitude of wind-induced vibration of the prototype are predicted. Comparing the predictions with the dynamic simulation made by the nonlinear finite element method, consistent results are demonstrated adequately.

Key words: large radio telescope, suspended cable-cabin structure, distorted model

中图分类号: 

  • P111.44