Peridynamic method having additional mirroring node, and numerical analysis apparatus using same

A numerical analysis apparatus for reducing errors in calculating displacement values of nodes of a structure, the numerical analysis apparatus comprising one or more processors configured to:

• calculate a shape tensor K of a first node;
• calculate force state vectors T of the first node and each of a plurality of second nodes by using the shape tensor;
• and
• calculate a peridynamic motion equation of the first node by using the force state vectors,
• wherein the first node is a node located on a boundary of the structure and has a predetermined size horizon region,
• the plurality of second nodes is nodes in the horizon region,
• the plurality of second nodes includes one or more third nodes,
• the third node is a second node having no node at a point which is origin-symmetrical based on the first node among the plurality of second nodes, and
• the one or more processors are configured to calculate the shape tensor by using a position value in which the third node is origin-symmetrical based on the first node,
• wherein the structure is a material, and the boundary is a crack or a boundary region in the material.