Two-stage size-layout optimization of axially compressed stiffened panels

Wang, Bo; Hao, Peng; Li, Gang; Tian, Kuo; Du, Kaifan; Wang, Xiaojun; Zhang, Xi; Tang, Xiaohan

doi:10.1007/s00158-014-1046-6

Cited by 47 publications

(7 citation statements)

References 34 publications

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“…A number of researchers studied the buckling behavior of stiffened cylindrical shells made of metals. Some of them [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] investigated the in uence of stiffener geometry on the buckling strength of cylindrical shells made of steel or aluminum with no cutouts under axial compressive loading. Some optimized [7][8][9][10][11][12][13][14][15][16][17] the design of the stiffeners on the shell surface.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Some of them [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] investigated the in uence of stiffener geometry on the buckling strength of cylindrical shells made of steel or aluminum with no cutouts under axial compressive loading. Some optimized [7][8][9][10][11][12][13][14][15][16][17] the design of the stiffeners on the shell surface. Weller and Singer [1] experimentally studied the effect of stiffeners on the buckling behavior.…”

Section: Literature Reviewmentioning

confidence: 99%

“…In early studies [7][8][9][10][11][12][13][14], researchers were mainly interested in the optimization of stiffener dimensions such as height and width and the stiffeners were applied uniformly over the entire shell surface. Besides, only few studies [18][19][20][21] considered geometrical imperfections like cutouts on shell surface and conducted optimization.…”

Section: Literature Reviewmentioning

confidence: 99%

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Topography Optimization of Cylindrical Shells With Cutouts for Maximum Buckling Strength

Gokyer

Sonmez

2022

Preprint

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In the presence of cutouts, the buckling strength of shell structures under compression significantly decreases. In order to compensate this, these structures are reinforced with stiffeners. In this study, the objective is to optimize the stiffener geometry and pattern on a cylindrical shell with two square holes to maximize the buckling load capacity without increase in its weight. A finite element model is developed to evaluate the buckling load of the structure. A good correlation is observed between the nonlinear analysis results of the model and the numerical and experimental results reported in the literature. Optimization is achieved in two levels. In the first level, topography optimization is performed to obtain the optimal stiffener pattern over the shell surface based on linear eigenvalue buckling analysis. In the second level, the stiffener heights and the shell thickness are optimized using a local search algorithm, Nelder-Mead; the buckling load levels are obtained by carrying out nonlinear buckling analyses in ANSYS. A Python code is developed to implement the optimization method and conduct analyses in ANSYS. The results show that stiffeners need to be introduced around the cutouts and the regions near the top and bottom edges for maximum buckling load capacity. The results also reveal that stiffeners on the mid lateral surfaces of the cylinder do not make significant contribution to the buckling strength. The bucking load of the optimized stiffened geometry is 22% higher than that of the unreinforced geometry having the same weight.

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Section: Literature Reviewmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

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Topography Optimization of Cylindrical Shells With Cutouts for Maximum Buckling Strength

Gokyer

Sonmez

2022

Preprint

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“…After that, Mulani et al [22,23] proposed a new framework to design curvilinear stiffened panels considering complex, multifunctional and aircraft structural concepts. Wang et al [24] and Hao et al [25] developed a novel bilevel optimization strategy based on the hybrid model to optimize the size and layout of stiffened panels with reinforced cutouts. Liu et al [26,27] suggested a non-parametric shape optimization method for designing the stiffeners on shell structures, in which the stiffness and eigenvalue maximization problems are considered.…”

Section: Introductionmentioning

confidence: 99%

Explicit Topology Optimization Design of Stiffened Plate Structures Based on the Moving Morphable Component (MMC) Method

Jiang¹,

Liu²,

Zhang³

et al. 2023

Computer Modeling in Engineering &Amp; Sciences

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This paper proposes an explicit method for topology optimization of stiffened plate structures. The present work is devoted to simultaneously optimizing stiffeners' shape, size and layout by seeking the optimal geometry parameters of a series of moving morphable components (MMC). The stiffeners with straight skeletons and the stiffeners with curved skeletons are considered to enhance the modeling and optimization capability of the current approach. All the stiffeners are represented under the Lagrangian-description framework in a fully explicit way, and the adaptive ground structure method, as well as dynamically updated plate/shell elements, is used to obtain optimized designs with more accurate analysis results. Compared with existing works, the proposed approach provides an explicit description of the structure. Thus, a stiffened plate structure with clear stiffener distribution and smooth geometric boundary can be obtained. Several numerical examples provided, including straight and curved stiffeners, hierarchical stiffeners, and a stiffened plate with a cutout, validate the effectiveness and applicability of the proposed approach.

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“…It was reported that using the proposed optimization framework, the load-carrying capacity for the three test problems improves by 17.4, 66.2 and 102.2 with respect to the initial design. 21 Reducing fabrication time and making it possible to achieve novel panel configurations causing the developments of new researches for the welded joints on aircraft stiffened panels. In a study presented by Murphy et al., a large-scale welded aircraft panel with multiple lateral and longitudinal stiffener bays has been tested, indicating that the panel behaviour is not limited by weld joint failure.…”

Section: Introductionmentioning

confidence: 99%

The development of design guidelines for integrally stiffened panels under compression using surrogate modelling

Dezyani¹,

Yousefi

Dalayeli

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part G:

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Preliminary design of stiffened compression panels used in aerospace structures is commonly based on the routine analytical and semi-empirical equations. Empirical charts are used for obtaining an initial guess to start the preliminary design process. In this paper, preliminary design guidelines for stiffened compression panels are developed based on the non-linear finite element analyses. Meanwhile, the process of design and optimization of the stiffened compression panels are carried out. Modelling phase is based on the finite element simulations of the structure. The surrogate modelling technique is employed to reduce the number of finite element analyses. An efficient technique is developed to find the global optimum of the surrogate model using sequential quadratic programming algorithm. The proposed approach is applied to two types of integrally stiffened panels. The final results are extracted as practical design guidelines which are suitable for preliminary design phase.

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Two-stage size-layout optimization of axially compressed stiffened panels

Cited by 47 publications

References 34 publications

Topography Optimization of Cylindrical Shells With Cutouts for Maximum Buckling Strength

Topography Optimization of Cylindrical Shells With Cutouts for Maximum Buckling Strength

Explicit Topology Optimization Design of Stiffened Plate Structures Based on the Moving Morphable Component (MMC) Method

The development of design guidelines for integrally stiffened panels under compression using surrogate modelling

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