Parallelized structural topology optimization and CFD coupling for design of aircraft wing structures

Oktay, E.; Akay, H. U.; Merttopçuoglu, Osman

doi:10.1016/j.compfluid.2011.05.005

Cited by 43 publications

(21 citation statements)

References 11 publications

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“…Under the hypothesis of small amount of elastic deformation, the jig shape design load is in the opposite direction of the static aeroelastic load basically, such as equation (10) shows: (10) which means the jig shape is the result of putting the aerodynamic force, gravity and thrust on the structure on the negative direction of the original ones when knowing the designed cruise shape. This kind of jig shape (the unloaded jig shape) achieves the design purpose and it has effective aerodynamic performance.…”

Section: Jig Shape Design Methodsmentioning

confidence: 99%

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An airplane jig shape design method based on high fidelity aeroelastic simulation

Yang

Wang

Zhou

et al. 2015

Aerospace Science and Technology

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This paper develops a jig-shape design method for the elastic wing of the commercial aircraft with high aspect ratio. Two optimization steps are involved in the design method to optimize the jig shape of the elastic wing with the user-desired cruise aerodynamic performance. The real aeroelastic simulation becomes the fundamental of the design procedure. Structural mesh based CFD solver has been applied to simulate the transonic flow with high fidelity. Finite element based structural model of wing with complex configuration is constructed, and the flexibility matrix is evaluated to predict the deflection of the wing. The high-efficient mesh deformation technique and the data exchange interface between CFD and CSD are implemented, which improves the efficiency and accuracy of current approach. The jig shape design of a baseline commercial aircraft is presented, and the numerical simulation shows that the design method is strong enough to obtain the optimized jig shape efficiently.

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Section: Jig Shape Design Methodsmentioning

confidence: 99%

“…As mentioned before, the cruise shape is much different from the jig shape because of the static aeroelastic deformation [10]. Normally, the aerodynamic design provides the cruise shape by CFD (Computational Fluid Dynamics) simulation and wind tunnel tests.…”

Section: Introductionmentioning

confidence: 99%

An airplane jig shape design method based on high fidelity aeroelastic simulation

Yang

Wang

Zhou

et al. 2015

Aerospace Science and Technology

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“…Oktay et al [10] combined results from a computational fluid dynamics (CFD) simulation on the computational solid mechanics (CSM) grid for the structure, which was used to conduct a topological optimization. The data from the flow grid was interpolated onto the grid for the structure by means of bi-line interpolation.…”

Section: State Of the Artmentioning

confidence: 99%

New biomimetic approach to the aircraft wing structural design based on aeroelastic analysis

Gaweł

Nowak

Hausa

et al. 2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. This paper presents a new biomimetic approach to the structural design. For the purpose of aircraft wing design the numerical environment combining simultaneous structural size, shape, and topology optimization based on aeroelastic analysis was developed. For the design of aircraft elements the optimization process must be treated as a multi-load case task, because during the fluid structure interaction analysis each step represents a different structural load case. Also, considering different angles of attack, during the CFD computation each result is considered. The method-specific features (such as domain independence, functional configurations during the process of optimization, and multiple load case solution implemented in the optimization scenario) enable the optimal structural form. To illustrate the algorithm functionality, the problem of determining the optimal internal wing structure was presented. The optimal internal wing structure resulting from aeroelastic computation with different angles of attack has been presented. ture of a wing. Their solution computed the pressure distribution for an analyzed shape, but missed coupling. Another approach to wing optimization refers to the reduction of skin thickness, which was done by Wang and Williams [3]. The wing was divided into dozens of panels, modeled as membranes. The wing՚s weight was reduced along with the increased stiffness of the whole model, stemming from the modification of the membranes thickness.In the papers of Krog [4, 5] the optimization of Airbus A380 ribs was treated as a two-step process. Potential geometry was reduced using standard topology optimization, and then the geometrical model was created for structural optimization purposes. Finally, the optimal structure was transformed into a CAD model which was afterwards verified.Stettner and Schuhmacher [6] also referred to topological and structural optimizations for designing the rear part of a military transport aircraft fuselage. The whole assembly as well as its frame has been analyzed with the same optimization methods within a two-stage process. The results were obtained separately for bending load, torsional load, and pressure exerted on side walls. Additionally, authors attempted to compile the individual results into a single form. However, it has to be emphasized that presented solution did not result from multi-load case calculations.Maute and Allen [7] suggested implementation of structural optimization methods in combination with an aeroelastic simulation. The problem was presented on the example of a slim wing model used for the two-dimensional topological optimization. The obtained configuration presented a conceptual distribution of the material inside the wing subjected to the impact of surrounding flow. The internal structure significantly differed from one we might expect on the basis of an analysis of the regular pressure distribution over a wing surface.

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“…Chintapalli et al [5] presented a methodology for the design optimization of a skin-stringer panel of an aircraft wing box. Oktay et al [6] presented a set of structural optimization tools for topology optimization of aircraft wing structures coupled with Computational Fluid Dynamics analyses. At the same time, a series of configuration design tools was introduced, such as Generic Parameterized Aircraft Surface [7], RAGE [8] and RDS-Professional [9].…”

Section: Introductionmentioning

confidence: 99%

Mesh Regeneration Method for Jig-Shape Optimization Design of the High-Aspect-Ratio Wing

Huo

Wang

Yuan

et al. 2013

Advances in Mechanical Engineering

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A mesh regeneration method was put forward, and its application on the jig-shape optimization design of a high-aspect-ratio wing was carried out in the present study. In the mesh regeneration method, some control lines were selected based on configuration characters of the wing structure firstly. And then a new aerodynamic model was built according to the new control lines distribution which always keeps the same outline. Finally, mesh generation and quality optimization were carried out. Three different jig-shape optimizations based on mesh regeneration method were carried out on a high-aspect-ratio wing. All of them can obtain the designed jig-shapes which have excellent agreement with the expectant one under the impact of static aeroelasticity. Lift coefficients of all the three jig-shape optimization were larger than that of the original flat wing. The results of integrated jig-shape optimization which considered both flexure and torsion were not as well as those in their own independent optimization. An appropriate jig-shape optimization method needs to be selected according to the practical high-aspect-ratio wing design.

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Parallelized structural topology optimization and CFD coupling for design of aircraft wing structures

Cited by 43 publications

References 11 publications

An airplane jig shape design method based on high fidelity aeroelastic simulation

An airplane jig shape design method based on high fidelity aeroelastic simulation

New biomimetic approach to the aircraft wing structural design based on aeroelastic analysis

Mesh Regeneration Method for Jig-Shape Optimization Design of the High-Aspect-Ratio Wing

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