| Solar array is an important apartment of spacecraft. When spacecraft orbit around the earth in space, it always enters into and leaves the earth shadow periodically. So severe temperature variation in this structure will induce thermal deformation and thermally induced vibration. These may have much effect on the normal work of the spacecraft. Inflatable solar array is a kind of novel solar array. This paper studies thermal deformation and vibration of inflatable solar array in space.This paper uses finite element method to simulate thermal deformation of solar array in space. Analysis temperature field and thermal deformation of solar array by the effect of heat flux such as solar heat flux and earth heat flux. It makes the steady-state thermal numerical simulations of two different materials and studies the steady-state temperature field and thermal deformation of this two structures. It gives the reason that induced bending deformation of the structure.According to the result, the heat flux of space will cause temperature gradient in the structure, which will induced large thermal deformation in solar array. So structure design or material chosen method should be taken in order to control the deformation.The booms are the main supporting and unfolding component of solar array. The deformation of booms effects deformation and vibration. This paper studies the thermally induced vibration of boom having incident heat flux on it. The influence parameters on vibration which contains damping ratio, material properties, radius, thickness and length is being analysis. They all have influence on vibration. Thermally induced vibration of different parameters are studied in detail. According to the results, it discussed the reason that induced vibration.The thermally vibration theory of Boley is used to predicts the vibrations of solar array at the end. Based on the results, it is useful to instructing engineering-oriented design in order to enhance the stability of thermally vibration.
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