Analysis on dynamic response of truss structure for deployable truss antenna

Analysis on dynamic response is one of the important parts of structure analysis for space deployable antenna. To study the dynamic response characteristics of truss structure for deployable truss antenna, according to the structure characteristics of truss structure, the finite element model is built by using ANSYS software. And the harmonic response analysis and transient dynamic analysis are carried out by full method and reduced method respectively, then many response curves of observation nodes are obtained. The results show that the amplitude becomes larger when the frequency of external load is close to or up to the natural frequency of structure, and when the structure hasn´t other external damping the amplitude attenuation is relatively slow under impact load. So the damping can be improved by choosing the proper materials and designing the reasonable structure. The results can provide the important reference data to the vibration research of truss structure and theoretical basis of structural optimization design.