Finite element modeling study on kinematic interface joints of reflector systems

The paper presents the consistent displacement method to model the kinematic interface joints according to their contact form in reflector systems. The finite element (FE) model of a reflector system is built subjected to the assuming, the modal analysis and the micro-vibration calculations are done on the FE model. The most error of computing first three order intrinsic frequencies is less 5%. The displacement root mean square (RMS) responses are consistent with results of tests, the displacement RMS errors about a great number of points are less 30%. Moreover, the transfer characteristics of four kinematic interface locals are consistent with results of the test. These results show that the method of modeling results the kinematic interface joints is feasible.