Vibrational analysis of curved sandwich panel with magnetorheologicalcore using improved high order sandwich panel theory

The studied sandwich panel was double curved and had a simply support boundary condition. In order to extract the system governing equations, the improved high order theory of sandwich panel for double-curved sandwich panel with magneto-rheological fluid and Hamilton's principle was used for the first time. Then the effect of magneticfield on the frequency of the panel has been investigated. The effects of changing the geometric parameters such as aspect ratio, thickness of MR layer, radius of curvature and thickness ratio on the characteristics of vibration panel have been studied. The obtained results showed that the natural frequencies of panel increase by increasing magnetic field strength to Bs (saturation magnetic field), increases by increasing the panel aspect ratio, and reduces by increasingthe core thickness to panel thickness ratio. Therefore, by changing these parameters, the natural frequency of the system, can be changed in the desired range.

کلیدواژه ها:

Free Vibration ، Curved Sandwich Panel ، Magneto-Rheological ، Improved High Order Sandwich Panel Theory