Abstract
Smartphones have been extensively used worldwide in recent years, and have functions to transfer information effectively by vibrating a panel. The panel is made of glass and fixed to the mobile phone's body by an adhesive tape. However, the vibration intensity is not strong enough and needs to be improved. Although a vast literatures dealing with vibration of plates exists, there has not been reported vibration of the glass panel fixed by the adhesive tape. This report presents simulation and experimental study on the forced vibration of glass panel used in the mobile phone. First, the authors derive an expression of the displacement of the plate by using Rayleigh-Ritz method. Here, the edges of the plate fixed by the adhesive tape are modeled by translational springs and rotational springs. Second, an experiment is conducted by using the modal analysis technique for glass test models. Third, spring constants are identified by using the Genetic Algorithm (GA) compared to natural frequencies obtained in the experiment. Fourth, steady-state response and mode shapes are calculated by using the derived equations for the plate with simply or elastic supported edges, respectively. Finally, both results are compared to confirm the validity of the present calculation method.
