| 摘要 |
PURPOSE: A method for calculating a heating procedure of a linear heating is provided in which an arrangement and heating conditions for heating lines are determined in order to carry out bending work such as work for a plate into an outer bending plate constituting a vessel shell (work for a metal plate into a target shape of a curved surface) in shipbuilding. CONSTITUTION: The method comprises a step (S1) of determining a distribution of bending principal strains for giving a target shape of a curved surface; a step (S2) of dividing calculation grids along directions of the bending principal strains; a step (S4) of dividing the directions of the bending principal strains into both a direction of a maximum bending principal strain and a direction of a minimum bending principal strain for each of the calculation grids; a step (S5) of determining a heating condition for heating a plurality of heating lines perpendicular to the direction of the maximum bending principal strain, the heating condition defying the maximum bending principal strain; a step (S3) of obtaining membrane strains generated accompanying with heating the plurality of heating lines under the heating condition from a database, the database including a relation between the heating condition and deformation components; a step (S6) of calculating a distribution of membrane strains required for achieving a deflection of the target shape of the curved surface in consideration of a distribution of the membrane strains obtained from the database; and a step (S7) of selecting a heating condition satisfying both the maximum bending principal strain and the calculated distribution of the membrane strains, and determining a heating procedure under the selected heating condition.
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