为实现索网动态抛物面成形,以索网中单根柔索为研究对象,研究了单根索动态找形技术.由于采用多杆单元代替柔索进行成形分析会带来较大的误差,因此使用两个控制节点问柔索作为一个索单元,在考虑索的自重及温度变形的情况下,建立了索单元几何与力学模型.在索单元几何与力学模型的基础上,给出了最佳悬链线拟合抛物线方法.通过仿真计算,得到了最优控制节点数目及拟合抛物线的控制节点坐标.
According to the deformation and motion requirement of the active main reflector of the telescope. In this paper, a dynamic shape finding technology of cable segment is studied, and considering the deadweight and change of temperature, the geometric model of the cable segment is built. A new method for approximating the catenary to the parabola is proposed According to the new method, the best reference points of the catenary segment are found.