Second, based on the above results, spacecraft model with two symmetrical solar panels is founded and unconstrained mode's frequency and vibration shape are computed in two cases: rotation and nonrotation. 在此基础上,以飞船带有双翼对称太阳帆板为模型,计算了太阳帆板在转动和不转动情况下非约束模态的振型和频率。