On the basis of theory of porous materials,in terms of nonlinear theory of dry friction,and combined with the model of small curved beam,the nonlinear constitutive relation of metal-rubber was constructed.The dynamic experiments were made for tempered hollow cylinder of metal-rubber.The structural stiffness and the natural frequency were obtained.The stiffness from theoretical model was compared with that from experiment.It is found that the former is consistent with the later,the model of the stiffness fro...