摘要
通过分析复合材料平面织物预成形体在铺覆过程中的变形模式,提出铺覆仿真计算的织物变形基本假设。分析已存在的几种渔网铺覆算法,提出一种基于曲面信息的改进渔网算法(SIB渔网法),该算法利用相邻节点处的曲面切向量及曲率信息来确定当前节点位置,避免了高强度的迭代计算,提高了仿真精度。研究采用非均匀有理B样条(NURBS)技术表达的复杂曲面求交算法。通过不同算法对球面、马鞍面仿真的结果对比,验证了SIB渔网法对复杂曲面铺覆计算的精确性及稳定性。
The composite flat woven preform deformation during the draping process was analyzed, and several fundamental assumptions were proposed for draping simulation. Based on the existing fishnet algorithms, a surface information based improved fishnet algorithm （SIB fishnet algorithm） was proposed. In this algorithm, geometry information of the surface such as tangent vector and normal curvature is used to determine the position of the current node. The use of the geometry information simplifies the mapping calculation and improves the computational accuracy. Surface-surface intersection algorithm needed for the SIB-fishnet algorithm was also studied in this paper. The draping simulation results of sphere and saddle surface generated by different algorithms were compared to verify the accuracy and stability of the SIB fishnet algorithm.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2014年第1期227-233,共7页
Acta Materiae Compositae Sinica
基金
国家"863"项目(2012AA03A202)
黑龙江省教育厅科学技术研究项目(12511441)
关键词
铺覆
渔网法
曲面信息
预成形体
织物变形
draping fishnet algorithms surface information preform woven deformation
