Results 71 to 80 of about 779 (181)

Numerical optimisation of a small-scale wind turbine through the use of surrogate modelling

Journal of Energy in Southern Africa, 2017
Wind conditions in South Africa are suitable for small-scale wind turbines, with wind speeds below 7 m.s−1. This investigation is about a methodology to optimise a full wind turbine using a surrogate model.
Gareth Erfort, Theodor Willem von Backström, Gerhard Venter   +2 more
doaj   +1 more source

Non-uniform rational B-splines-based aerodynamic shape design optimization with the DLR TAU code

Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, 2011
With the improving capabilities of computational fluid dynamics (CFD) for the prediction of aerodynamic performance, CFD tools are now being increasingly used for aerodynamic design optimization in the aerospace industry. In this article, an automated optimization framework is presented to address inviscid aerodynamic design problems.
Martin, Mario Jaime, Andres, Esther, Widhalm, Markus, Bitrian, Pablo, Lozano, Carlos   +4 more
openaire   +1 more source

On the application of the partition of unity method for nonlocal response of low-dimensional structures

Journal of the Mechanical Behavior of Materials, 2014
The main objectives of the paper are to (1) present an overview of nonlocal integral elasticity and Aifantis gradient elasticity theory and (2) discuss the application of partition of unity methods to study the response of low-dimensional structures.
Natarajan Sundararajan
doaj   +1 more source

Particle Swarm Optimization of Non Uniform Rational B-Splines for Robot Manipulators Path Planning

Periodica Polytechnica Electrical Engineering and Computer Science, 2017
The path-planning problem is commonly formulated to handle the obstacle avoidance constraints. This problem becomes more complicated when further restrictions are added. It often requires efficient algorithms to be solved. In this paper, a new approach is proposed where the path is described by means of Non Uniform Rational B-Splines (NURBS for short ...
Nabil Benoudjit, Noureddine Goléa, Nadjib Zerrouki   +2 more
openaire   +2 more sources

Automatic constraint-based synthesis of non-uniform rational B-spline surfaces

, 2018
In this dissertation a technique for the synthesis of sculptured surface models subject to several constraints based on design and manufacturability requirements is presented. A design environment is specified as a collection of polyhedral models which represent compo­ nents in the vicinity of the surface to be designed, or regions which the surface ...
openaire   +3 more sources

Sensitivity Analysis of Underwater Structural-Acoustic Problems Based on Coupled Finite Element Method/Fast Multipole Boundary Element Method with Non-Uniform Rational B-Splines

Journal of Marine Science and Engineering
For the direct differentiation technique-based modeling of acoustic fluid–structure interaction and structural-acoustic sensitivity analysis, a coupling algorithm based on the finite element method (FEM) and the fast multipole boundary element method ...
Yonghui Cao, Zhongbin Zhou, Yanming Xu, Yilin Qu   +3 more
doaj   +1 more source

Research on How the Knot Vector Influences Non-uniform Rational B-spline Curve

Chinese Journal of Mechanical Engineering, 2008
Based on the non-uniform rational B-spline(NURBS)curve theory,the general rule of how the knot vector affects the shape of the NURBS curve is put forward.The local support property on how a knot affects the NURBS curve is demonstrated.The quantitative computation formula on how a knot affects the NURBS curve is obtained.An experiment performed on the ...
openaire   +1 more source

Feed Rate-Adaptive Predictive PH Interpolation for Real-Time NURBS Toolpath Execution in High-Speed CNC Machining

Measurement Science Review
This study presents a novel feed rate-adaptive predictive interpolation algorithm that combines Pythagorean-hodograph (PH) curves with non-uniform rational b-splines (NURBS) to improve real-time toolpath generation in high-speed CNC machining.
Tian Guosheng
doaj   +1 more source

Meshless finite element method: using non-uniform rational B-splines

, 2001
To alleviate the major difficulties in the prevailing mashes methods, a research program was initiated to propose a robust alternative for solving a broad class of boundary-value problems. In this program, Non-Uniform Rational B-Spline (NURBS) basis functions are used directly to construct the approximation function. Master of Engineering (CSE)
openaire   +1 more source

BIM-based framework of automatic tunnel segment assembly and deviation control

Underground Space
The design of universal segments and deviation control of segment assembly are essential for robust and low-risk tunnel construction. A building information modeling (BIM)-based framework was proposed for parametric modeling, automatic assembly, and ...
Jian Gong, Tengfei Bao, Zheng Zhu, Hong Yu, Yangtao Li   +4 more
doaj   +1 more source