Application of Dynamic Vibration Absorber to Suppress Lateral Vibrations of the Radar Antenna

In this study effect of using Dynamic Vibration Absorbers (DVA) to attenuate undesired vibration of radar antenna is studied. The vibratory responses of the assembled and disassembled radar antennas are measured. Using the Experimental Modal Analysis (EMA), the lumped model of the antenna and the whole system is obtained. Based on the aerodynamic relations, the frequency of the Fluid–Structure Interaction-based excitation on the antenna is calculated at different wind speeds. The effects of changing the Antenna Tuning Unit’s (ATU) geometry on the vibratory behavior and critical wind speed of the radar antenna are shown. Finally, the DVA is designed for the antenna, and its application to decrease the FSI-based vibration of the antenna is investigated.