A Comparative Analysis Of Free Vibration In Stiffened Versus Unstiffened Plates

Prof. Clara Johansson; Prof. Ingrid Dahlberg

Authors

Prof. Clara Johansson Division of Applied Mechanics, Chalmers University of Technology, Gothenburg, Sweden
Prof. Ingrid Dahlberg Department of Structural Engineering, Lund University, Lund, Sweden

Keywords:

Stiffened plate structures, Free vibration, Finite element analysis, Natural frequency

Abstract

This study presents a comprehensive investigation into the free vibration characteristics of stiffened plate structures, which are commonly used in aerospace, marine, and civil engineering applications. By employing analytical and finite element methods, the influence of various stiffener configurations, boundary conditions, and material properties on the natural frequencies and mode shapes of the plate structures was evaluated. The results demonstrate that both the orientation and geometry of stiffeners significantly affect the dynamic behavior, offering potential for tailored vibration performance in engineering design. The findings also highlight the accuracy of numerical simulations in capturing complex vibrational responses when validated against analytical models.

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