Vibration Analysis of Circle Truss of the Astromesh Deployable Antenna

Characteristics vibration and stiffness of astromesh deployable antenna is mainly decided by circle truss. So vibration of circle truss is necessary to be analyzed. At first, analyze the structure of the astromesh deployable antenna, and set up mass matrix, stiffness matrix and force vector of link ending points with the method of finite unit. Then transforming-coordinate matrixes and expanding-coordinate matrixes are used to transform the matrixes and vectors. The repeated addition method is adopted to found the vibration equations of the whole system. The program in the software Matlab and simulation in the software Ansys are used to get the numerical results of theory analysis and check the correctness of theory analysis. The analysis makes the structure more reasonable.