Patent ID: 7974791

Claim:
A computer program for optimization of stress distribution on an object to be tested for defects using ultrasound excitation and evaluation based on a resulting surface temperature distribution, the computer program embodied in non-transitory computer readable media and operable when executed by a processor to perform the following steps: performing a simulation on a Computer Aided Design (CAD) model of the object under test conditions prior to testing the object, calculating vibrational spectra and a plurality of vibrational modes, determining local mechanical stresses on the simulated object resulting from each of the plurality of vibrational modes, and selecting vibrational modes to be excited for an actual, non-simulation test of a real object from the plurality of vibrational modes such that: mechanical stress in a selected region of the real object resulting from each selected vibrational mode is above a predetermined minimum stress in order to enable a reliable proof of defect, and mechanical stress in all other regions of the real object resulting from each selected vibrational mode is smaller than a predetermined maximum stress by a predetermined factor in order not to damage the real object at weak points.