As a kind of important shock absorber, rubber shock absorber has been widely used in various kinds of machinery, automobile, railway locomotive, water transport vehicle, aircraft and other aircraft. It can be said that the use of rubber shock absorbers is required for all areas requiring shock absorption and isolation. Rubber shock absorber is widely used because of its effective use of the following characteristics of rubber:

1) rubber has high elasticity and viscoelasticity;

2) compared with steel materials, the elastic deformation of rubber is very large and the elastic modulus is very small;

3) the impact stiffness of rubber is greater than that of dynamic stiffness, and the dynamic stiffness is greater than static stiffness, which is beneficial to reduce impact deformation and dynamic deformation.

4) the stress-strain curve is the elliptical hysteresis line, and its area is equal to the vibrational energy (damping) of the vibration cycle, which can be adjusted by formula design.

5) rubber is incompressible material (poisson ratio is 0.5);

6) the rubber shape can be freely chosen, and the hardness can be adjusted by formulation design, which can meet the requirements of stiffness and strength in different directions.