Arithmetic device, arithmetic method, and computer-readable storage medium

An arithmetic method comprising:

• acquiring an actual measurement deformation amount of a fabrication object that is manufactured based on a target shape, the actual measurement deformation amount corresponding to a deviation amount of a shape of the fabrication object from the target shape;
• performing an analysis, based on the target shape of the fabrication object and a reference inherent strain value corresponding to a reference value of an inherent strain of the fabrication object, to acquire an analytical deformation amount corresponding to a deviation amount of the shape of the fabrication object in the analysis from the target shape;
• and
• calculating an estimated inherent strain value corresponding to an estimated value of the inherent strain of the fabrication object with the target shape, based on the actual measurement deformation amount and the analytical deformation amount, wherein
• the fabrication object is fabricated by layer stacking,
• the method further comprises:
• setting the inherent strain value for each layer, based on the reference inherent strain value, and
• analyzing a model of the fabrication on which a first layer is stacked using the inherent strain value set for the first layer, and then analyzing a model of the fabrication in which a second layer is stacked on top of the first layer using the inherent strain value set for the second layer.

A non-transitory computer-readable storage medium storing a computer program for causing a computer to execute:

• acquiring an actual measurement deformation amount of a fabrication object that is manufactured based on a target shape, the actual measurement deformation amount corresponding to a deviation amount of a shape of the fabrication object from the target shape;
• performing an analysis, based on the target shape of the fabrication object and a reference inherent strain value corresponding to a reference value of an inherent strain of the fabrication object, to acquire an analytical deformation amount corresponding to a deviation amount of the shape of the fabrication object in the analysis from the target shape;
• and
• calculating an estimated inherent strain value corresponding to an estimated value of the inherent strain of the fabrication object with the target shape, based on the actual measurement deformation amount and the analytical deformation amount, wherein
• the fabrication object is fabricated by layer stacking,
• the computer program further causes the computer to execute:
• setting the inherent strain value for each layer, based on the reference inherent strain value, and
• analyzing a model of the fabrication on which a first layer is stacked using the inherent strain value set for the first layer, and then analyzing a model of the fabrication in which a second layer is stacked on top of the first layer using the inherent strain value set for the second layer.