Simulation apparatus and simulation method

摘要

A computer-readable medium stores a magnetic substrate simulation program causing a computer to execute a process that includes calculating an effective magnetic field for each area of an element in the magnetic substrate, when magnetization of each area changes and based on a magnetic field generated from magnetic energy in each area and a rate of change of magnetization working in a direction inhibiting change in the average magnetization of the areas; obtaining for each area and based on the calculated effective magnetic fields and magnetization of each area, changes in magnetization and calculating for each area, magnetization after the changes; judging based on magnetization of each area before and after the changes, whether magnetization in the element converges; and storing a combination of the average magnetization of the areas for which magnetization in the given element converges and a static magnetic field based on the average magnetization.

主权项

1. A non-transitory computer-readable recording medium having stored therein a program for causing a computer to execute a process for simulating a magnetic substrate, the process comprising:
calculating, when magnetization of each area changes, an effective magnetic field for each area that is obtained by dividing any given element among a group of elements forming the magnetic substrate, the effective magnetic field including a magnetic field generated from magnetic energy in each area and a rate of change of magnetization working in a direction inhibiting change in the average magnetization of the areas based on:Hi=-∂Etot⁡(ri)∂Mi-β⁢∂M_∂t wherein Hi is the effective magnetic field of sub-element ci, Etot is the total magnetic energy, ri is a position vector of sub-element ci, Mi is magnetization of sub element ci, [Mav1 is the average magnetization, and β is a constant; obtaining magnetization after the direction inhibiting change by calculating the amount of change of magnetization based on the effective magnetic field calculated for each area and magnetization of each area; judging whether magnetization in the given element converges based on magnetization of each area before the direction inhibiting change and the magnetization after the direction inhibiting change; and storing a pair of the average magnetization of the areas and the static magnetic field that is based on the average magnetization to a storage device when magnetization in the given element is judged to converge.