Influence of reduction and interpolation methods on the correlation of calculated and measured modal data of a solar array

At Fokker Space and Systems the measured and calculated modal data of an ARA 3-panel-clean-wing were correlated. The number of degrees of freedom (dof's) of the finite element model (FEM) is about 6400 and of the measurement 32. Three methods were used to obtain corresponding dof's namely: 1) the number of dof's of the FEM was reduced with a...

Calculation of vibration modes and resonance frequencies of the Northrop NF-5

The component mode technique is used to calculate resonance frequencies and vibration modes of the Northrop NF-5 structure. The results of the calculations are compared with those of a ground vibration test.