Method for establishing fabric geometric model according to motion trail of yarn carrier

The invention provides a method for establishing a fabric geometric model according to a motion trail of a yarn carrier, and belongs to the field of three-dimensional composite material weaving. According to the method, the motion trail of a yarn carrier (the free end of the yarn) is obtained, the space path of the yarn on a core mold is obtained through a digital conversion method, the yarn projection path is calculated, the interweaving point is determined, the up-and-down coordinate fluctuation of interweaving is achieved, yarn assembling is carried out finally, a fabric structure is obtained, and autonomous growth of the fabric is achieved. The modeling method has the advantages that weaving of a real prefabricated body and reconstruction of a geometric model are not needed, the economic cost is saved, the process of applying equipment and boundary conditions in the virtual weaving process is omitted, the computing power of a computer is saved, the modeling efficiency is improved, and certain universality