MODAL ANALYSIS OF COMPOSITE PLATE BY USING ANSYS

This study thoroughly investigates the vibration responses of fibre-reinforced laminated composite plates, focusing on identifying mode shapes and calculating natural frequencies. Theoretical calculations, based on the material properties, geometric dimensions, and boundary conditions, were performed to determine the natural frequencies at which the plate vibrates naturally under dynamic loads. A comprehensive modal analysis using ANSYS software involved creating a detailed 3D model of the composite plate with ply orientations set at 0 degrees and 90 degrees to study the effects of fibre orientation on the plate's vibration characteristics. Mode shapes, representing specific deformation patterns at each natural frequency, were identified, providing critical insights into the movement of different parts of the plate during vibration. The comparison of theoretical natural frequencies with those derived from ANSYS simulations showed a strong correlation, validating the accuracy of both the theoretical models and the ANSYS simulations. The results highlighted the natural frequencies for specific modes (Mode 11, Mode 21, and Mode 22), showing close agreement between theoretical and analytical values. This study demonstrates that theoretical models can accurately predict the natural frequencies and mode shapes of fibre-reinforced laminated composite plates. The close match between theoretical and analytical results underscores the reliability of ANSYS software for conducting modal analysis in composite materials. Identifying mode shapes and natural frequencies is crucial for designing and optimizing composite structures to withstand operational loads and dynamic forces without experiencing excessive vibrations or failures.