摘要
用曲面重构实现流曲面建模是工程中的关键问题,现有的曲面重构方法只基于点云几何信息,重构曲面很难符合流体动力学定义,需要复杂的人工处理。在传统重构研究的基础上提出了结合流体速度和点云距离函数的优化模型,用曲面演化方法求解模型极值获得最终流曲面的方法。与现有方法相比,所提出的方法在保证重构几何精度的同时,可以使得重构曲面符合流线型造型的外形要求,尤其是点云中噪声、层叠和孔洞等缺陷的重构结果更为合理。应用实例和比较证明了该方法的有效性。
Stream surface modeling by surface reconstruction is a challenge work in industrial application.The known reconstruction methods based only on geometric information are difficult to obtain the resulting surface with the definition of fluid dynamics and need complicated artificial intervention.Proposes a novel reconstruction method for stream surface with the incorporation of fluid velocity and distance function.By solving the corresponding reconstruction model with level set equation,the stream surface is achieved.Compared with existing reconstruction methods,this approach can guarantee not only the geometric accuracy but also the shape definition of stream surface,reducing the noise,holes and overlapping regions of defective point data more reasonably.The example demonstrates the effectiveness of the proposed method.
出处
《现代制造工程》
CSCD
北大核心
2011年第2期1-5,102,共6页
Modern Manufacturing Engineering
基金
国家自然科学基金项目(50835004
50625516)
关键词
流曲面
曲面重构
流体速度场
水平集方程
stream surface
surface reconstruction
fluid velocity field
level set equation
