Parameterization Framework for the MDAO of Wing Structural Layouts

Dubois, Arthur; Farhat, Charbel; Abukhwejah, Abdullah H.; Shageer, Hesham

doi:10.2514/1.j056752

Cited by 6 publications

(3 citation statements)

References 37 publications

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“…In the aero-structural optimization framework, it seems that mainly sizing variables such as the thickness are introduced into the design process [74,75]. The use of an isogeometric model with embedded entities can be very attractive to enlarge the design space by adding shape variables as the position of the stiffeners [76,77].…”

Section: Discussionmentioning

confidence: 99%

The embedded isogeometric Kirchhoff–Love shell: From design to shape optimization of non-conforming stiffened multipatch structures

Hirschler

Bouclier

Duval

et al. 2019

Computer Methods in Applied Mechanics and Engineering

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Isogeometric shape optimization uses a unique model for the geometric description and for the analysis. The benefits are multiple: in particular, it avoids tedious procedures related to mesh updates. However, although the analysis of complex multipatch structures now becomes tractable with advanced numerical tools, isogeometric shape optimization has not yet been proven to be applicable for designing such structures. Based on the initial concept of integrating design and analysis, we develop a new approach that deals with the shape optimization of non-conforming multipatch structures. The model is built by employing the Free-Form Deformation principle. Introducing NURBS composition drastically simplifies the imposition of the shape updates in case of a non-conforming multipatch configuration. In the case of stiffened structures, the use of embedded surfaces enables to tackle the geometric constraint of connecting interfaces between the panel and the stiffeners during shape modifications. For the analysis, we introduce the embedded Kirchhoff-Love shell formulation. The NURBS composition defines the geometry of the shell while the displacement field is approximated using the same spline functions as for the embedded surface. We also formulate a new mortar method to couple non-conforming Kirchhoff-Love shells which intersect with any angle. We apply the developed method on different examples to demonstrate its efficiency and its potential to optimize complex industrial structures in a smooth manner.

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Section: Discussionmentioning

confidence: 99%

The embedded isogeometric Kirchhoff–Love shell: From design to shape optimization of non-conforming stiffened multipatch structures

Hirschler

Bouclier

Duval

et al. 2019

Computer Methods in Applied Mechanics and Engineering

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“…In addition, multi-component design problems of aircrafts have been extensively studied by Zhang and his co-workers [23,24,25]. However, these final optimized designs [26,27,28] are generally not able to be fabricated directly since these designs (1) have no direct link with CAD modelling system and (2) their edges normally need to be smoothed. Recently proposed morphable moving component/void (MMC/MMV) [29,30,31] methods have the ability to seamlessly integrate topology optimization in CAD modeling systems, which can overcome problem (1).…”

Section: Introductionmentioning

confidence: 99%

Topological Design of a Lightweight Sandwich Aircraft Spoiler

Liu

et al. 2019

Materials

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In this study, a lightweight sandwich aircraft spoiler (AS) with a high stiffness-to-weight ratio was designed. Excellent mechanical properties were achieved by the synthetic use of topology optimization (TO), lattice structure techniques, and high-performance materials, i.e., titanium alloy and aluminum alloy. TO was first utilized to optimize the traditional aircraft spoiler to search for the stiffest structure with a limited material volume, where titanium alloy and aluminum alloy were used for key joints and other parts of the AS, respectively. We then empirically replaced the fine features inside the optimized AS with 3D kagome lattices to support the shell, resulting in a lightweight sandwich AS. Numerical simulations were conducted to show that the designed sandwich AS exhibited good mechanical properties, e.g., high bending rigidity, with a reduction in weight by approximately 80% when compared with that of the initial design model. Finally, we fabricated the designed model with photosensitive resin using a 3D printing technique.

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“…In addition, multi-component design problems of aircrafts have been extensively studied by Zhang and his co-works [20][21][22]. Most recently, novel aircraft wings [23][24][25] have been produced. However, these final optimized designs are generally not able to be fabricated directly, especially for finite element-based TO method, since these designs (1) have no direct link with CAD modelling system and (2) their edges are normally needed to smooth.…”

Section: Introductionmentioning

confidence: 99%

Designing a Sandwich Aircraft Spoiler with Lattice Structure Cores

Ou¹,

Liu²,

He³

et al. 2019

Preprint

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By combing continuum topology optimization (TO) method and lattice structure technique, a sandwich aircraft spoiler with a high stiffness-to-weight is designed. TO method is served to produce the shell of the aircraft spoiler and the lattice structure, used as cores, is employed to support the shell. TO problem is established as maximizing the stiffness of the structure with limited material volume. Density-based method is utilized to achieve a 0/1 solution. We then empirically replace the core of the aircraft spoiler by using 3D kagome lattice structure. Two different materials, i.e., aluminum alloy and titanium alloy, are synthetically applied to further reduce the weight and simultaneously improve the strength of the aircraft spoiler. Numerical simulations are conducted to show that the designed aircraft spoiler can meet the service environment with a reduction of its weight by approximately 80% when compared with that of the initial design model. Finally, we have fabricated the designed model with photosensitive resin by using 3D printing technique.

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Parameterization Framework for the MDAO of Wing Structural Layouts

Cited by 6 publications

References 37 publications

The embedded isogeometric Kirchhoff–Love shell: From design to shape optimization of non-conforming stiffened multipatch structures

The embedded isogeometric Kirchhoff–Love shell: From design to shape optimization of non-conforming stiffened multipatch structures

Topological Design of a Lightweight Sandwich Aircraft Spoiler

Designing a Sandwich Aircraft Spoiler with Lattice Structure Cores

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