Research Article

A Multimode Approach to Geometrically Nonlinear Free and Forced Vibrations of Multistepped Beams

Table 4

Comparison between normalized first nonlinear modes and for .


1.953070559600.99504143259212831.92929395580.005546040320137
1.953070559600.995041432592128431.92929395580.005546040320142
Difference4.4408E−165.381E−15