Hello,
I just have a question
Does the obtained Eigen frequency of certain Eigen-form correspond to the bridge natural frequency in this form or not ?
Hello
As far as I know the eigenfrequency and the natural frequency describe the same frequency. So when you calculate the eigenforms of your structure, you get multiple eigenfrequencies that depend on the number of dynamic degrees of freedom.
More information can be found in the ASE manual.
SSD / TEDDY > Help > User Manuals > All Manuals… > ASE > chapter 2.15 Dynamic Modal Analysis
Best regards
Frederik Höller
Your SOFiSTiK Support Team