Conformal Load-bearing Antenna's Dynamic Evolution Mechanism Of Mechanical Performance

Conformal load-bearing antenna is not only a part of carrier platform bearing structure, but also electronic equipment which can receive and send electromagnetic waves. It has great applications and broad development prospects. However, the multi-layer composite structure of conformal load-bearing antenna is vulnerable to the effects of manufacturing process and service environment, which cause the degradation of performance. In order to reveal its dynamic evolution mechanism of the mechanical properties. Respectively, this paper analyzed the influence of the crack in the manufacture process and the impact on the mechanical performance of the conformal load-bearing antenna. First of all, a parameter identification method of fracture parameters was put forward. By the experimental data and theory model, with the help of bayesian inference method the fracture parameters of conformal load-bearing antenna was identified in statistical sense and I designed the experiment verified this method. Secondly on the basis of the identification results, I build the finite element model of the conformal load-bearing antenna. Analyzed the evolving law of the crack under different cycle times and the fatigue life under different load amplitude using this model, which provided the basis for structural design and forecast of damage about the conformal load-bearing antenna. Finally based on the typical service environment I analyzed the structural damage, the contact force and energy changing with the time by the finite element, which had a guiding significance on the impact damage forecast and conformal load-bearing antenna structure design.