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

Abstract:

The warp knitted metal mesh is the key material for the preparation of metal cable-mesh 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 three-dimensional 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 are defined according to the three-dimensional experience geometric model of the loop and geometric model of the loop, and minimum repetitive structures are 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 are 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.

Key words: cable-mesh antennas, warp knitted metal mesh, minimum repetitive structure, geometric model of the loop, contact problems