Structural and aeroelastic flutter analysis of wing store systems and structural modification approach in aeroelasticity

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2021-9-08

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Akpınar, Aytaç

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The preliminary aeroelastic design process of the wings with stores is one of the most significant design activities to be considered in the aerospace industry. The focus of this thesis is mainly based on the dynamic aeroelasticity of the wing store systems including the discipline of mechanical vibrations. In the present study, the Finite Element Method (FEM) and structural modification approach are primarily implemented in the wing store aeroelastic systems. Aero-structural modeling and aeroelastic flutter analysis of the wing store systems are performed for 1-D beam-like and 2-D delta wings. A lumped mass store model is introduced to beam-like wings while a 1-DOF pitching elastic store model is introduced for delta wings. The structural model for the wing store systems is defined through the Finite Element Method (FEM) and store attachment is considered as local structural modifications. The structural and aeroelastic flutter characteristics of beam-like wings and delta wings with stores are investigated including different types of flutter solution methods, namely, K-Method, P-K Method, and Non-Iterative P-K Method. The traditional redesign process of the aeroelastic model is redefined by introducing the Dual Modal Structural Modification (DMSM) method as aeroelastic systems are concerned. The design optimization study for the store parameters is carried out considering the worst-case flutter criteria. This thesis includes different types of solution methods that are developed in-house and by utilizing commercial software.

Subject Keywords

Wing store flutter, Structural modification, Store design optimization

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https://hdl.handle.net/11511/93263

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

A. Akpınar, “Structural and aeroelastic flutter analysis of wing store systems and structural modification approach in aeroelasticity,” M.S. - Master of Science, Middle East Technical University, 2021.