| 摘要 |
PROBLEM TO BE SOLVED: To provide a convenient calculation method for calculating a mechanical performance of a perforated frame. SOLUTION: In a non-perforated frame 28, first apparent non-perforated sections 26, 26 have an apparent Young's modulus of 122 GPa, a second apparent non-perforated section 27 has an apparent Young's modulus of 108 GPa, and remaining base material non-perforated section 18 has an apparent Young's modulus of 206 GPa. Since the division number can be reduced if there is no perforation, a mechanical performance value such as a flexure, a bending stress, a torsion stress, a tension stress and a compression stress of the non-perforated frame 28 can be easily calculated. After the perforated frame is replaced with the non-perforated frame, the mechanical performance is calculated by use of the non-perforated frame. If the non-perforated frame is used, the mechanical performance can be easily calculated, and a calculation time can be reduced. The invention can be achieved by employing the apparent physical value such as the Young's modulus. COPYRIGHT: (C)2009,JPO&INPIT
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