Smoothing experimental data in dynamic substructuring of built up systems Fig. 7 Inertance H22 of the coupled systemAB:measured raw (blue) and fitted (red) 0 5 10 15 10−2 100 102 Frequency [Hz] Magnitude [(m/s2)/N ] 0 5 10 15 −15 −10 −5 0 Frequency [Hz] Phase [rad] Fig. 8 Inertance H33 of the coupled systemAB:measured raw (blue) and fitted (red) 0 5 10 15 10−2 100 102 Frequency [Hz] Magnitude [(m/s2)/N ] 0 5 10 15 −10 −5 0 Frequency [Hz] Phase [rad] Fig. 9 Inertance H22 of subsystem B: measured raw (blue) and fitted (red) 0 5 10 15 10−2 100 102 Frequency [Hz] Magnitude [(m/s2)/N ] 0 5 10 15 −5 0 5 Frequency [Hz] Phase [rad] The stiffness values of the additional springs are shown in Table 2. Table 2 Additional springs used to preload subsystems AandB k s kA 5 k A 6 k B 2 k B 3 [N/m] 361 268 218 274 99
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