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Operator- and template-based modeling of solid geometry for Isogeometric Analysis with application to Vertical Axis Wind Turbine simulation

机译:用于等几何分析的基于实体和模板的实体几何建模,并应用于垂直轴风力涡轮机仿真

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This article describes a novel approach to modeling and storage of NURBS-based solid objects for Isogeometric Analysis. The proposed method is based on a procedural description of the modeling process. Creation of geometric objects as well as the steps of the modeling process are formulated as a list of simple commands. This provides an abstraction from the often times tedious manual specification of control point locations to create a given geometric object. This operator-based approach, in conjunction with the existing template-based geometry modeling methods, allows one to create complex and multi-level adaptive models. To illustrate our method, we construct the geometry of a Vertical Axis Wind Turbine (VAWT) that is suitable for isogeometric fluid and fluid-structure interaction analysis. A new template is proposed for modeling VAWTs together with a novel algorithm for constructing wind turbine airfoil profile B-Spline curves from point data. The resultant model has a compact representation that makes use of a small number of parameters. A preliminary aerodynamics simulation of a newly constructed VAWT model in 3D under realistic wind conditions and rotation speed is presented.
机译:本文介绍了一种用于等几何分析的基于NURBS的固体对象建模和存储的新颖方法。所提出的方法基于建模过程的过程描述。几何对象的创建以及建模过程的步骤被表述为简单命令的列表。这从通常繁琐的控制点位置手动指定中提供了一个抽象,以创建给定的几何对象。这种基于运算符的方法与现有的基于模板的几何建模方法相结合,可以创建复杂的多层自适应模型。为了说明我们的方法,我们构建了适用于等几何流体和流体-结构相互作用分析的垂直轴风力涡轮机(VAWT)的几何形状。提出了用于对VAWT建模的新模板,以及用于根据点数据构建风力涡轮机翼型轮廓B样条曲线的新算法。所得模型具有紧凑的表示形式,该表示形式使用少量参数。提出了在实际风况和转速下,在3D模式下新建的VAWT模型的初步空气动力学模拟。

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