A novel design framework for generation and parametric modification of yacht hull surfaces

Khan, Shahroz; Günpinar, Erkan; Dogan, Kemal Mert

doi:10.1016/j.oceaneng.2017.03.013

Cited by 47 publications

(23 citation statements)

References 22 publications

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“…A parent hull, shown in Figure 3, is initially stored in the database. During the interactive process, design modification of parent shape is performed using parametric design approach proposed by Khan et al [22]. In this design framework, the overall hull shape is divided into three regions: Entrance-Region (ER), Middle-Region (MR) and Run-Region (RR).…”

Section: User-interface Of Genyachtmentioning

confidence: 99%

“…The interactive design involves user preference/intuition interactively during the design process, thereby guiding the design exploration towards a more promising region of design space. At this step, hull designs are searched with GDT, and three-dimensional (3D) surface models for the yacht hulls are generated using Khan et al's [22] parametric design technique. Afterwards, these models are presented to the user along with their physical properties such as hydrostatics and resistance.…”

Section: Introductionmentioning

confidence: 99%

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GenYacht: An interactive generative design system for computer-aided yacht hull design

2019

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In the present work, a new digital design system, GenYacht, is proposed for the creation of optimal and user-centred yacht hull forms. GenYacht is a hybrid system involving generative and interactive design approaches, which enables users to create a variety of design alternatives. Among them, a user can select a hull design with desirable characteristics based on its appearance and hydrostatics/hydrodynamic performance. GenYacht first explores a given design space using a generative design technique (GDT), which creates uniformly distributed designs satisfying the given design constraints. These designs are then presented to a user and single or multiple designs are selected based on the user's requirements. Afterwards, based on the selections, the design space is refined using a novel space-shrinking technique (SST). In each interaction, SST shrinks the design space, which is then fed into GDT to create new designs in the shrank space for the next interaction. This shrinkage of design space guides the exploration process and focuses the computational efforts on user-preferred regions. The interactive and generative design steps are repeated until the user reaches a satisfactory design(s). The efficiency of GenYacht is demonstrated via experimental and user studies and its performance is compared with interactive genetic algorithms.

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Section: User-interface Of Genyachtmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

GenYacht: An interactive generative design system for computer-aided yacht hull design

2019

Self Cite

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“…The parameter ranges for these models are given in Table 1. The CAD model modifications of the glass and rim were performed using the technique proposed by Khan et al [64].…”

Section: Cad Modelsmentioning

confidence: 99%

Evolving a Psycho-Physical Distance Metric for Generative Design Exploration of Diverse Shapes

Khan

Günpinar

Moriguchi

et al. 2019

Journal of Mechanical Design

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In this paper, a generative design approach is proposed that involves the users’ psychological aspect in the design space exploration stage to create distinct design alternatives. Users’ perceptual judgment about designs is extracted as a psycho-physical distance metric, which is then integrated into the design exploration step to generate design alternatives for the parametric computer-aided design (CAD) shapes. To do this, a CAD model is first parametrized by defining geometric parameters and determining ranges of these parameters. Initial design alternatives for the CAD model are generated using Euclidean distance-based sampling teaching–learning-based optimization (S-TLBO), which is recently proposed and can sample N space-filling design alternatives in the design space. Similar designs are then clustered, and a user study is conducted to capture the subjects’ perceptual response for the dissimilarities between the cluster pairs. In addition, a furthest-point-sorting technique is introduced to equalize the number of designs in the clusters, which are being compared by the subjects in the user study. Afterward, nonlinear regression analyses are carried out to construct a mathematical correlation between the subjects’ perceptual response and geometric parameters in the form of a psycho-physical distance metric. Finally, a psycho-physical distance metric obtained is utilized to explore distinct design alternatives for the CAD model. Another user study is designed to compare the diversification between the designs when the Euclidean and the suggested psycho-physical distance metrics are utilized. According to the user study, designs generated with the latter metric are more distinct.

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“…Yu et al [14] established a practical mathematical model of the horse-hoof-shaped leg by using the NURBS method, and applied it in the innovative design of the Chinese Ming and Qing style furniture. In [15], Khan et al proposed a new design framework based on some feature curves that are represented by Bézier curves for the parametric design of a yacht hull. Merrell and Manocha [16] proposed a new synthesis algorithm for complex curve generation, which retained many local shape features of a given example input curve, and has demonstrated the application on furniture products.…”

Section: Introductionmentioning

confidence: 99%

“…As previously described, the basis geometry theory of the parametric design method is the curve and surface modeling, of which the classic tools are parametric curves and surfaces, e.g., Bézier, B-spline, NUBRS and so on [4]. Up to now, the major components among them are widely used in fields of product shape design and all kinds of CAD software [7][8][9][10][11][12][13][14][15][16]. However, in recent years, the curves and surfaces mentioned above are difficult to implement and meet the practical requirements in the design or engineering field [17,18].…”

Section: Introductionmentioning

confidence: 99%

Parametric Model for Kitchen Product Based on Cubic T-Bézier Curves with Symmetry

2020

Symmetry

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The parametric method of product design is a pivotal and practical technique in computer-aided design and manufacturing (CAD/CAM) and used in many manufacturing sectors. In this paper, we presented a novel parametric method to design a kitchen product in the residential environment, a kitchen cabinet, by using cubic T-Bézier curves with constraints of geometric continuities. First, we introduced a class of cubic T-Bézier curves with two shape parameters and derived the G1 and G2 continuity conditions of the cubic T-Bézier curves. Then, we constructed shape-controlled complex contour curves of the kitchen cabinet by using closed composite cubic T-Bézier curves. The shapes of the contour curves can be adjusted intuitively and predictably by altering the values of the shape parameters. Finally, we studied shape optimization and representation of ellipses for the contour curves of the kitchen cabinet by finding optimal shape parameters and applicable control points respectively. The provided modeling examples showed that our method in this paper can improve the design and scheme adjustment effectively in the conceptual design stage of kitchen products.

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A novel design framework for generation and parametric modification of yacht hull surfaces

Cited by 47 publications

References 22 publications

GenYacht: An interactive generative design system for computer-aided yacht hull design

GenYacht: An interactive generative design system for computer-aided yacht hull design

Evolving a Psycho-Physical Distance Metric for Generative Design Exploration of Diverse Shapes

Parametric Model for Kitchen Product Based on Cubic T-Bézier Curves with Symmetry

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