星载可展开天线热振动数值分析

摘要

Thermal induced vibration of a deployable antenna was analyzed by the non-coupling dynamics and finite element method.Thermal dynamic forces was simulated by a half sine wave thermal shock.Typical model node displacement and stress, as well as root mean square of antenna induced by thermal dynamic forces were discussed.The results show that thermal induced vibration of antenna occurs when thermal dynamic forces greatly change.Meanwhile, the dynamic response of thermal induced vibration is significantly greater than that of the static response.%根据非耦合动力学理论及有限元方法,研究分析了星载可展开天线的热振动.利用半正弦波温度冲击模拟热动力荷载,对天线典型节点的热振动位移和应力以及形面精度进行了数值分析.研究表明,急剧变化的温度荷载将导致该天线结构发生热振动,热振动响应明显大于静力学响应.