Dynamics,Analysis,of,the,MRF,Rectangular,Sandwich,Plate,Based,on,ANSYS:on the point of

　　Abstract: Magnetorheological fluid (MRF) is in liquid when there are no external stimuli. However, when they are subjected to an applied magnetic ?eld, their physical appearance changes from viscoelastic body to viscoelastic plastic body, and eventually to become more like a solid gel. During this transformation, the vibration characteristics of the MRF rectangular sandwich plates change as well. For the simple MRF rectangular sandwich structure, the natural frequency and loss factor can be obtained by theoretical derivation method. But for the large complex MRF sandwich structure is difficult to deal with and the experimental study have great effect by the experimental conditions. What’s more, the experiment load condition is also very limited, so the use of the finite element analysis software to simulation is necessary. In this paper, a theoretical calculation method of MRF rectangular sandwich plate simply supported on four edges has been proposed to calculate Natural Frequency. Based on the ANSYS, this paper proposes several methods to simulate MRF rectangular sandwich plate, and obtains the best modular model by compare with the theoretical result.
　　Key words: Magnetorheological fluid; ANSYS; Complex shear modulus; Viscosity；Natural frequency