Optimal Design And Experimental Study On Radar Radom

The radome system is one of the most important part of aircraft, which requires favorableelectromagnetic performance to satisfy the requirement of transmissivity and mechanicperformance like stiffness and strength to protect the electronic devices inside. The main task ofthis article is study the strength and stiffness of the sandwich structure radome by finite elementmodeling and experiment verification.At first, a finite element model of the sandwich structure radome is divided using a2D shellelement to study the deformation and stress distribution under four typical load cases. Then checkthe strength of the laminate radome frame, GFRP radome wall panel and the foam core materialaccording to the maximum stress criterion and the maximum principle stress criterion.Based on the results, the3D finite element models of two adhesive interfaces-the connectedregion and the biggest deformation region-are established. Using the displacement field from theabove analysis as the boundary condition, study the pull-off strength of the connected regionbetween the laminate frame and the radome wall and the stripping quality between the sandwichstructure panel and the foam core material.Due to the internal deformation of the load case1is too large to satisfy the technicalrequirement, the author come up with two optimization design solution of the radome aims tocontrol the deformation, by optimizing the thickness of the sandwich structure panel andinstalling some supporting components inside the radome.At last, a mechanical property experiment of the original radome structure and the internallyinstalled web structure radome is conducted to understand the deformation of the radome and thefeasibility of the improved solution.