Structural analysis of planar printed array antenna
FE Model of Printed Array Antenna |
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Stresses for Random Vibration Analysis |
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Objective:
Printed array antennas are one of the most sensitive devices on an aircraft, having sensitive electronics on their surface which process data received by the antenna. The antenna needs to be designed optimally and perform satisfactorily in adverse conditions.
Methodology:
The antenna structure was idealized using shell, beam and mass elements. Static analysis was carried out for a range of operating ambient temperature. Dynamic analysis was carried out for shock, sinusoidal and random vibration for the flight envelope.
It was determined that the fundamental frequency was greater than the upper limit specified for frequency sweep. The maximum deflection occurred in crash hazard loading conditions, and the maximum von-Mises stress occurred during temperature loading and was a highly localized phenomena restricted to the fixity region.
The antenna was redesigned and passed as airworthy.
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Case Studies