质量约束的三维模型建模方法

在当今的智能制造和工业软件设计领域,CAD和CAE是极为重要的技术.但现有的CAD和CAE模型表示方法不统一,在数据交换上需要耗费大量时间,造成了计算资源极大的浪费.非均匀有理B样条(NURBS)模型作为一种兼容CAD和CAE的模型表达方式,以样条曲线为基函数,无须进行交换即可进行等几何分析.本文提出了一种基于质量约束...

3D Modeling based on Mass Dependence

CAD(Computer Aided Design)and CAE(Computer Aided Engineering)are extremely important technologies in today's intelligent manufacturing and industrial software design fields.However,representation methods of the existing CAD and CAE model vary,and it consumes a lot of time to exchange data,resulting in a great waste of computing resources.Non-uniform rational B-spline(NURBS)model,as a model expression compatible with CAD and CAE,takes spline curve as the basis function,and can perform isogeometric analysis without exchange.This paper proposes a NURBS modeling method based on mass dependence,which takes model mass as a constraint during modeling,so that the constructed model meets the requirements of isogeometric analysis.This paper takes a model with a complex connected domain as an example to perform isogeometric analysis.Compared with popular commercial software,the minimum value is the same,the maximum error is within 10%,and the running time decreases by 4.61%,which verifies the correctness of this method.