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为将来在中国建造世界上最大的射电望远镜(简称FAST),采用了索、塔及移动小车馈源支撑结构体系。本文对此结构体系进行了1/30缩尺模型试验研究和理论分析,获得了模型结构索中张力和结构动力特性沿馈源球冠的变化规律。理论分析结果和试验结果二者吻合较好,说明本文的分析方法和分析过程是可行的,具有较高的计算精度。分析结果还表明,在进行结构动力反应分析中,小车的扭转振动不容忽视。
For the future in China to build the world’s largest radio telescope (FAST), using cable, tower and mobile car feed support structure system. In this paper, 1 / 30th scale model test and theoretical analysis of this structural system were carried out. The variation of tension and structural dynamic characteristics along the feed sphere were obtained. The theoretical analysis and experimental results agree well with each other, which shows that the analysis method and analysis process in this paper are feasible and have high computational accuracy. The analysis also shows that the torsional vibration of the car can not be ignored in the structural dynamic response analysis.