Experimental modal analysis of a simply supported plate

This paper presents the experimental modal analysis (EMA) of a simply supported plate. The equation of motion of the simply supported plate and it's boundary conditions are first discussed. The frequency response functions (FRFs) and modal parameters are then theoretically derived. The experimental simulation of simply supported plate is illustrated and built. Experimental modal analysis is then performed to obtain a series of frequency response functions and the corresponding coherence functions. By the operation of curve-fitting on the FRFs, the modal parameters can be determined. Results show that both the experimental and theoretical results agree well. The built simply supported plate is, therefore, validated and can be used as the demonstration tools of EMA as well as for the further study on the structural vibration and controls.