Buckling design of submerged arches via shape parameterization

2019 ◽  
Vol 1 (5) ◽  
Author(s):  
Alejandro Mateo Hernández‐Díaz ◽  
Andrés Muñoz ◽  
Javier Fernando Jiménez‐Alonso ◽  
Andrés Sáez
Keyword(s):  
Shape Parameterization

Supersonic Bi-Directional Flying Wing Wave Drag Optimization Based on Alternative Form of CST Method

2013 ◽  
Vol 477-478 ◽  
pp. 240-245
Author(s):  
Xiaohui Guan
Keyword(s):  
Drag Reduction ◽  
High Speed ◽  
Wave Drag ◽  
Alternative Form ◽  
Shape Transformation ◽  
Flat Bottom ◽  
Symmetric Configuration ◽  
Shape Parameterization ◽  
Wave Drag Reduction ◽  
Sufficient Precision

Bi-directional Flying Wing (BFW) is a new supersonic civil transport shape concept that aims to meet the conflict requirements of high speed cruise and low speed take-off/landing missions. In this paper the Class-Shape-Transformation (CST) shape parameterization method is modified to represent the BFW shape, and new basis functions suitable for the BFW airfoil representation are constructed. The Far-field Composite Element (FCE) wave drag optimization is performed on both the flat bottom and symmetric BFW configurations, and the drag reduction effects and result precision are surveyed. It is suggested that significant wave drag reduction can be achieved by the FCE optimization for both the flat bottom and the symmetric BFW configurations. The wave drag coefficients with sufficient precision can be obtained in the FCE optimization of the symmetric configuration; while the FCE optimization results of the flat bottom one are not accurate enough.

Mesh Morphing and Smoothing by Means of Radial Basis Functions (RBF)

2012 ◽  
pp. 347-380 ◽  
Author(s):  
Marco Evangelos Biancolini
Keyword(s):  
Radial Basis Functions ◽  
Basis Functions ◽  
Mathematical Framework ◽  
Mesh Morphing ◽  
Physical Problems ◽  
Radial Basis ◽  
Interaction Modelling ◽  
Shape Parameterization ◽  
Computational Fluid Dynamics Cfd ◽  
And Performance

Radial Basis Functions (RBF) mesh morphing, its theoretical basis, its numerical implementation, and its use for the solution of industrial problems, mainly in Computer Aided Engineering (CAE), are introduced. RBF theory is presented showing the mathematical framework for a basic RBF fit, its MathCAD implementation, and its usage. The equations required for a 2D case comparing RBF smoothing and pseudosolid smoothing based on Finite Elements Method (FEM) structural solution are given; RBF exhibits excellent performance and produces high quality meshes even for very large deformations. The industrial application of RBF morphing to Computational Fluid Dynamics (CFD) is covered presenting the RBF Morph software, its implementation, and a description of its working principles and performance. Practical examples include: physical problems that use CFD, shape parameterisation strategy, and modelling guidelines for setting-up a well posed RBF problem. Future directions explored are: transient shape evolution, fluid structure interaction modelling, and shape parameterization in multi-physics, multi-objective design optimization.

Data-driven shape parameterization for segmentation of the right ventricle from 3D+t echocardiography

2015 ◽  
Vol 21 (1) ◽  
pp. 29-39 ◽  
Author(s):  
Richard V. Stebbing ◽  
Ana I.L. Namburete ◽  
Ross Upton ◽  
Paul Leeson ◽  
J. Alison Noble
Keyword(s):  
Right Ventricle ◽  
Data Driven ◽  
Shape Parameterization ◽  
The Right
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