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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。
According to the theory of non-coupling dynamics and finite element method, the thermal vibration of spaceborne antenna is studied. The numerical simulation of thermal vibration displacement and stress and the surface accuracy of the typical nodes of an antenna were simulated by using the thermodynamic load simulated by half-sine temperature shock. Research shows that the rapidly changing temperature load will lead to thermal vibration of the antenna structure, the thermal vibration response is significantly greater than the static response.