Cases of bar-like galaxies showing the strongest increase in the bar strength at one of the pericenters. Each panel shows results for a galaxy with ID given at the top of the plot. The lines display the evolution of the axis ratios b/a (blue line), c/a (red), the triaxiality T (green), the bar mode A(< 2r_1/2) (black), and the rotation parameter f (magenta). The vertical dashed lines indicate pericenter passages; the thicker one marks the interaction causing the strongest increase in the bar mode.