Abstract
This study aimed to parametrically investigate the changes in modal frequency values on a steel beam caused by specified damaged schemes. In this context, the ANSYS Workbench software program was used to create a steel profile's finite-element model. A cantilever steel beam profile is created with a 60x60 mm cross-section and 3m length utilizing single-sided fixed support. In the finite-element model, the crack depth, width, and distance to the support were parametrically assigned as the damaged scheme to the steel profile. To investigate the effects of those damages on the modal frequency values of the steel profile, first of all, the modal frequency values for undamaged cases corresponding to the first ten-mode shapes were obtained. Then, the specified crack properties were determined parametrically, and the changes in frequency values for damaged cases were examined. In addition, a comparative evaluation of the effect of crack properties on the natural frequency of the steel element was performed by utilizing response surface and six sigma analysis. The analysis results demonstrated that specified crack schemes have different effects on different modal natural frequencies. The applied response surface and six sigma analysis provided important statistical data on the modal natural frequency values of the steel beam.
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