function VTB2_4(z,rmin,rmax)%VTB2_4 Displacement transmissibility ratio and force transmissibility% ratio of a single degree of freedom damped system.% VTB2_4(zeta,rmin,rmax) plots the displacement transmissibility % and force transmissibility of a single degree of freedom damped % system (with damping ratio zeta) between the frequency ratios % rmin and rmax.r=rmin:(rmax-rmin)/1000:rmax;DT=sqrt((1+(2*z*r).^2)./((1-r.^2).^2+(2*z*r).^2));%(2.41)FT=(r.^2).*DT;%(2.47)semilogy(r,DT)xlabel('Frequency Ratio')ylabel('Displacement Transmissibility Ratio')title('Displacement Transmissibility Ratio versus Frequency Ratio')text(0,0,'Press Return To Continue','sc')pausesemilogy(r,FT)xlabel('Frequency Ratio')ylabel('Force Transmissibility Ratio')title('Force Transmissibility Ratio versus Frequency Ratio')text(0,0,'Press Return To Continue','sc')