| 摘要 |
A screw fastening unit, in which two members such as a base and a cover are fastened by a screw is extracted from a three-dimensional model, and each of circular arc surfaces of the screw, a screw through hole, and a screw hole disposed in the screw fastening unit is changed to a polygonal shape, for example, a hexagonal or octagonal polyhedron approximating the circular arc surface. An analysis model divided into meshed analysis units is created by allocating polyhedral meshes along the edge surfaces of the screw, screw through hole and screw hole which is changed to polyhedrons. Finally, the friction of the contact unit of the screw and the screw hole which have undergone mesh division is set to be infinite so as to achieve a fixed state.
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