Estimation method for estimating estimation target included in analysis condition, analysis method, program, and estimation device

A program for causing a computer to execute an estimation method of estimating at least one estimation target included in an analysis condition from an analysis result and measurement data corresponding to a part of the analysis result or data calculated from the measurement data,

• the measurement data being data measured on at least one measurement point,
• the estimation method comprising:
• a first analysis step of obtaining an analysis result of a FEM analysis, a finite difference analysis, a boundary element method analysis, a particle method analysis, a meshfree method analysis, or an analysis with theoretical formula performed using an analysis condition including the estimation target;
• a second analysis step of obtaining an analysis result of a FEM analysis, a finite difference analysis, a boundary element method analysis, a particle method analysis, a meshfree method analysis, or an analysis with theoretical formula performed with a value obtained by applying perturbation to a value of the estimation target used in the first analysis step being set as a value of the estimation target;
• and
• a calculation step of calculating a sensitivity matrix on the basis of the analysis result of the first analysis step and the analysis result of the second analysis step, calculating an error between the analysis result of the first analysis step and the measurement data at the measurement point or the data calculated from the measurement data, and calculating an amount for changing the value of the estimation target from the sensitivity matrix and the error, wherein
• the first analysis step, the second analysis step, and the calculation step are repeated until the error is minimized,
• the FEM analysis, the finite difference analysis, the boundary element method analysis, the particle method analysis, the meshfree method analysis, or the analysis with theoretical formula in the first analysis step performed first is an analysis performed with an initial value being set to the estimation target, and
• the FEM analysis, the finite difference analysis, the boundary element method analysis, the particle method analysis, the meshfree method analysis, or the analysis with theoretical formula in the first analysis step performed second and subsequent times is an analysis performed by setting, as the estimation target, a value obtained by changing the value of the estimation target used in the first analysis step performed previously by the amount for changing calculated in the calculation step performed previously.

An estimation device comprising a control unit, wherein

• the control unit is provided to execute an estimation method for estimating an estimation target pertaining to at least one type and included in an analysis condition from an analysis result and measurement data corresponding to a part of the analysis result or data calculated from the measurement data,
• the measurement data being data measured on at least one measurement point,
• the estimation method comprising:
• a first analysis step of obtaining an analysis result of a FEM analysis, a finite difference analysis, a boundary element method analysis, a particle method analysis, a meshfree method analysis, or an analysis with theoretical formula performed using an analysis condition including the estimation target;
• a second analysis step for obtaining an analysis result of a FEM analysis, a finite difference analysis, a boundary element method analysis, a particle method analysis, a meshfree method analysis, or an analysis with theoretical formula performed with a value obtained by applying perturbation to a value of the estimation target used in the first analysis step being set as a value of the estimation target;
• and
• a calculation step for calculating a sensitivity matrix on the basis of the analysis result of the first analysis step and the analysis result of the second analysis step, calculating an error between the analysis result of the first analysis step and the measurement data at the measurement point or the data calculated from the measurement data, and calculating an amount for changing the value of the estimation target from the sensitivity matrix and the error, wherein
• the first analysis step, the second analysis step, and the calculation step are repeated until the error is minimized,
• the FEM analysis, the finite difference analysis, the boundary element method analysis, the particle method analysis, the meshfree method analysis, or the analysis with theoretical formula in the first analysis step performed first is an analysis performed with initial value being set to the estimation target, and
• the FEM analysis, the finite difference analysis, the boundary element method analysis, the particle method analysis, the meshfree method analysis, or the analysis with theoretical formula in the first analysis step performed second and subsequent times is an analysis performed by setting, as the estimation target, a value obtained by changing the value of the estimation target used in the first analysis step performed previously by the amount for changing calculated in the calculation step performed previously.