Method For Non-Destructive Inspection of Parts

A method for non-destructive inspection of a part for obtaining the properties and characteristics of a material of which the part is made, the method comprising:

• creating a mathematical model describing a dynamic behavior of the part taking into account a geometry of the part to be inspected and the properties of the material at different points of the part to be inspected, the properties of the material being represented by a set of parameters;
• optimizing surrounding conditions after creating the mathematical model, the optimizing surrounding conditions including the following first, second and third steps performed in an iterative manner:
• a first step of selecting surrounding conditions;
• a second step of obtaining modal shapes and associated characteristic values for the surrounding conditions selected in the first step;
• and
• a third step of calculating a sensitivity of the associated characteristic values obtained in the second step of a same iteration to the properties and characteristics of the material of the part, for the one or more surrounding conditions selected in the first step of the same iteration,
• after optimizing the one or more surrounding conditions, selecting from among the modal shapes obtained in the second step a subset of modal shapes that correspond to the surrounding conditions and the modal shapes for which the sensitivity of the characteristic values to the properties and characteristics of the material of the part is maximum;
• selecting at least one excitation point of the part with an excitation orientation and at least one measurement point of the part with a measurement orientation depending on the selected subset of modal shapes;
• exciting the part at the at least one excitation point with the excitation orientation;
• and
• measuring a vibratory response of the part at the at least one measurement point with the measurement orientation.