扇形太阳电池阵折展机构模态及谐响应分析

太阳电池阵折展机构的固有振动特性是保障太阳电池阵正常工作、避免产生共振现象的关键因素。文章设计了一种新型扇形太阳电池阵折展机构，并对其进行约束模态及谐响应分析：首先根据模态分析得到其前20阶的固有频率为2.93～41.22 Hz；进而设置谐响应分析加载频率的范围为1～65 Hz，对折展机构的3个危险节点进行谐响应分析，获得各节点的频率‒位移响应曲线。研究结果表明：扇形太阳电池阵折展机构在6.47～11.62 Hz频率范围出现整体弯曲变形，在36.49～41.22 Hz频率范围出现局部变形，3个危险节点的位移峰值分别为21.35、263.25、262.75 mm。

Analysis of modal shape and harmonic response of folding mechanism of fan-shaped solar arrays

The inherent vibration characteristics of the folding mechanism of the solar arrays are important for the normal operation of the solar array against any resonance. A new type of the solar array folding mechanism is designed. The constrained modal analysis is made and the resonance response of the fan-shaped solar array folding mechanism is analyzed. The natural frequencies of the first twenty orders are obtained through the modal analysis. The loading frequency range is set between 1 Hz and 65 Hz. The harmonic response analysis is made on three dangerous nodes of the mechanism, and the respective frequency displacement is determined. It is shown that the solar array folding mechanism has an overall bending deformation in the frequency range between 6.47 Hz and 11.62 Hz, and the local deformation occurs in the frequency range of 36.49 Hz to 41.22 Hz, with the peak values of the displacement of the three nodes being 21.35 mm, 263.25 mm, and 262.75 mm, respectively.