Mode plots and actual response for 480 different eigenfrequencies may be seen by clicking on the figure on the intersection between the vertical lines (representing chosen front layer thicknesses) and the solid lines representing eigenfrequencies in the structure. The corresponding eigenmode and the actual deformation at the eigenfrequency is then shown in the lower frame.
For more information, see FE Simulations of Piezoceramic Disks with a Front Layer of Varying Thickness, presented at the 1999 IEEE International Ultrasonics Symposium Proceedings. The above figure is the same as Fig. 4 in the paper.