36. Calibration and Cross-Validation of a Car Component Model Using Repeated Testing

Repeated testing has been made both in the sense of testing multiple test pieces of the same type and in the sense of repeated tests on the same test piece by 13 testers at different occasions. Between the individual tests, the test subject has been dismounted from the test stand and the sensors have been re-calibrated. Statistical evaluation of these tests gives information about the spread that can be expected in modal tests. The SIMO test data and data statistics are used for traditional validation and cross-validation of a finite element model of the car component under test. Planning of the sensor layout has been made prior to testing with the use of the nominal finite element model. A model calibration is made prior to the model validation. The finite element model size is over 20,000 degrees-of-freedom and involves two calibration parameters. The work has been made as part of a structural dynamics model validation Master’s course. An open-source Matlab application has been used for calibration, validation and cross-validation.