摘要
经编金属丝网是研制金属网状可展开天线的关键材料,其力学性能直接影响天线的力学和电性能,为了研究经编金属丝网的力学特性,基于线圈的几何模型,建立了网眼式经编金属丝网的三维几何模型,并采用有限元法实现了含接触问题的金属丝网静力学分析.首先,根据线圈的三维几何经验模型定义线圈形状的型值点,利用非均匀有理B样条曲线拟合得到线圈的几何模型和丝网的最小重复结构,从而得到丝网的几何模型;其次,基于增广拉格朗日乘子法,将黏结接触状态的约束方程引入丝网的势能泛函中,建立了考虑接触问题的增量有限元求解方程,进而实现了丝网的力学性能分析;最后,通过对比丝网双向拉伸仿真与实验的数据,证明了该力学分析方法的有效性.
The warp knitted metal mesh is the key material for the preparation of metal cablc-mcsh antennas,and its mechanical properties directly affect the mechanical and electrical properties of the antenna.In order to study its mechanical properties,based on the geometric model of the loop,a threedimensional geometric model of the metal mesh is established,and the finite element method is used to realize the static analysis of the metal mesh.First,data points of the loop geometry arc defined according to the three-dimensional experience geometric model of the loop and geometric model of the loop,and minimum repetitive structures arc obtained by the NURBS curve,so as to obtain the geometric model of the metal mesh.Second,based on the augmented Lagrange multiplier method,constraint equations for the bonded contact arc substituted into the potential energy functional,and the incremental finite element equation that considers the contact problem is established,so as to realize the analysis of mechanical properties of the metal mesh.Finally,the data comparison of the bi-axial tension simulation and experiment show the validity of the analysis method.
作者
朱日升
张逸群
杨东武
杨癸庚
ZHU Risheng;ZHANG Yiqun;YANG Dongwu;ANG Guigeng(Ministry of Education Key Lab.of Electronic Equipment Structure,Xiclian Univ.,Xi'an 710071,China)
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2018年第2期59-65,共7页
Journal of Xidian University
基金
国家自然科学基金资助项目(51775404)
关键词
网状可展开天线
经编金属丝网
最小重复结构
线圈几何模型
接触问题
cablc-mcsh antennas
warp knitted metal mesh
minimum repetitive structure
geometric model of the loop
contact problems
