| Περίληψη: | The challenging and ever-changing transport sector poses new requests and challenges to the international community, rendering the design and improvement of an aircraft’s performance in the aerospace field nowadays the subject of detailed scientific studies. The demand for conceptual multiphysics simulations based on aircraft wing modeling that provides accurate results is increasing. On that front, the development of high-fidelity Computational Simulation Technology enables the engineers to model and solve complex multiphysics phenomena, thus reducing the need for physical experiments. Among the plethora of disciplines rising during the design cycle of an aircraft, is the simulation of the fluid-structure interaction between the flow and the structure. It is necessary to predict, in the early phase of the design process, the mutual dependence between the fluid and the structure to prevent undesired instabilities that could affect the flight performance. Due to its highly complex nature, several numerical techniques and software packages have been developed to simulate the fluid-structure coupling to various Reynolds number flows and predict the mechanical behavior of such components. Furthermore, the need for more lightweight and design-oriented structures with a balance between aerodynamic and operational performance, key to current mission requirements, has given rise to the discipline of design optimization. To transform the mathematical optimization background into useful design tools, several optimization packages have also been developed and adjusted to the needs of the aerospace industries to efficiently improve the performance of aircraft and generate optimization methodologies that support the Computational Fluid Dynamic (CFD) and Computational Structural Mechanics (CSM) studies. The Fluid-Structure Interaction (FSI) modeling and the Structural Optimization Algorithms (SOA), are gathering the attention of the mechanical industries, and multidimensional approaches are conducted to couple the software solvers. In this diploma thesis, the effect of fluid flow to the structural analysis of the commercial aircraft wing of CESSNA CITATION CJ4 is detailed studied, and further open-source optimization algorithms that reduce the overall weight of the aircraft wing are developed.
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