Abstract：In operation process, contact surface slip faults of antenna lock seat often happen due to vibration to cause locking state failure of the lock seat.Here, in order to solve this problem, a test analysis method for contact surface mechanical state of antenna lock seat was proposed. Firstly, an overlapped antenna test model was designed and manufactured to do vibration tests.Its frequency response curve and dynamic strain curve were obtained in vibration tests.Then, a spring set equivalent model was introduced on contact surface of the lock seat, and the whole overlapping antenna finite element (FE) model was built. According to the test results, the FE model was modified.Finally,contact force states before and after the lock seat having slip fault were analyzed contrastively to evaluate effects of slip fault on the lock seat performance.
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