In real life, vibration is everywhere, and the phenomenon of vibration cannot be ignored and indispensable. People have been working on the research on the generation, control and elimination of vibration. The vibration of all objects will produce sound. If there is no vibration, there will be no music. , Humans can no longer communicate with language. But vibration will also have many adverse effects on people's lives, such as: resonance will cause damage to the device, noise will affect the living environment of human beings, etc. How to reduce the adverse effects of vibration on people Minimization is the current development and pursuit of shock absorption technology. The core of shock absorption technology is to eliminate interfering vibration or find a solution. Now the more applicable and mature shock absorption method is rubber shock absorption system. shock.

Rubber is an ideal damping material. The damping and shock absorption technology uses the unique viscoelasticity of rubber. During the vibration process, under the action of external force, severe internal friction is caused, and a reaction force is generated, which converts kinetic energy into thermal energy. energy conversion, so as to achieve the purpose of reducing the vibration amplitude.

The role of shock-absorbing rubber:
Instead of metal springs, it plays the role of damping and absorbing vibration. Its main performance requirements are static stiffness, dynamic stiffness, and durability.

Characteristics of shock-absorbing rubber:
①Rubber is composed of a variety of materials, and the same shape can have different properties through material adjustment.
②The friction between the internal molecules of the rubber makes it have a certain damping performance, that is, the hysteresis of motion (the deformation of the rubber lags behind the stress of the rubber during the stress process).
③ Rubber will produce different elastic coefficients in the process of compression, shearing and stretching

Performance characteristics of shock-absorbing rubber:
The definition of static stiffness: refers to the ratio of the change of the pressure (or tensile force) to the change of the displacement of the shock-absorbing rubber within a certain displacement range.

The definition of dynamic stiffness: refers to the ratio of the change of the pressure (or tensile force) to the change of the displacement of the shock-absorbing rubber within a certain displacement range and a certain frequency.

The definition of dynamic magnification refers to the ratio of the dynamic stiffness to the static stiffness measured by the damping rubber within a certain displacement range, namely: Kd/Ks
Loss coefficient: During the stress process of the shock-absorbing rubber, there is a certain phase difference between the deformation of the rubber and the stress of the rubber, and the stress of the rubber is generally ahead of the deformation of the rubber by a certain phase angle δ

Torsional stiffness: refers to the ratio between the torsional moment and the torsion angle of the shock absorbing rubber within a certain torsion angle range.

Durability: refers to the number of vibrations when the shock-absorbing rubber is in a certain direction and a certain preload, amplitude, and vibration frequency, after n times of reciprocating vibration, the product is intact or the product is vibrated back and forth until it is destroyed. Durability is a measure of shock absorption. Important indicators of the safety performance and comprehensive performance of rubber parts.