A geometric unit cell model of the three-dimensional and seven-directional braided composite is established to describe the basic structure,and the relationship between braiding parameters is deduced.

• 在此基础上,建立了能反映其基本结构的几何单胞模型,并推导了编织参数之间的数学关系,为进一步分析三维七向编织复合材料的力学性能奠定了基础。