Abstract: Radome wall structures are often sandwich type limited by electrical performance designs, where the radome is mounted onto aircraft fuselage thorugh the use of rubber sealer, hinge, and limited numbers of coin pins and locks. The radome is also required to undertake aerodynamic loads. Thin wall sandwich structures is wick in undertaking pressure loads, while the root constraints is very stiff and can undertake large loads, which conseqnently influence the stress distribution of the radome. Correct modeling of the root constrains will yield correct stress fields on the radome. This paper uses segmented linear, non-linear tracing modeling, result reverse calculation and test verification to raise and substantiate a detailed modeling method of radome root constraint. This paper takes a certain radome as an example, and conducts FEM modeling around the requirement of NASTRAN software that uses on other modeling approaches. The present method is proved to be a reliable way to the detailed modeling of radome constraint.

Key words: radome, the roots of the constraint, fined modeling