In order to make full use of the test measurement results

a method of FE (finite element) model updating with adoption of both correlated and uncorrelated modes for updating was put forward

and successfully applied in a certain type of modern high thrustweight ratio turbofan engine. The calculated values of the modified model were close to the test values by the correction calculation. The error was close to 0 and the MAC (model assurance criteria) value close to 1. Result showed that

the proposed method was found to successfully update an FE model yielding correct estimates of the updating parameters in the presence of uncorrelated modes

and the updated FE model had a high calculation precision.