Aeroelastic analyses and tests of a wing like structure with payload

Serin, Özgür
In this study, a wing-like structure with three payloads was examined from the point of flutter characteristic by performing frequency domain flutter analyses in a commercial software ZAERO© and conducting wind tunnel flutter tests in Ankara Wind Tunnel (ART) test facility. Based upon the aeroelastic certification flow admitted by the independent aviation authorities being active across the globe, for each configuration of the wing-like structure, finite element models were created using Altair Hypermesh© software, finite element modal analyses were realized with the solver of MSC Nastran© and ground vibration tests were conducted with Simcenter Scadas© data acquisition system. For the purpose of obtaining more accurate flutter analysis results, required finite element models of the configurations were modal updated per the ground vibration test results. Afterwards, the flutter onset speeds and frequencies for each configuration were acquired with the flutter analyses realized by applying the finite element modal analysis results of both updated and non-updated finite element models. All these outputs were compared with the flutter onset speeds and frequencies ascertained in the wind tunnel tests and consistency between the analysis and the test was investigated. In addition, the influence of the installation of three payloads to the wing-like structure in different combinations was studied in the sense of flutter behavior and the reasons of unexpected results were interpreted by further analysis and tests.