Eigen frequency and natural frequency


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 ?


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