Introduction to the background of nonlinear damping steel spring isolators

Linear steel spring isolator: There is a large deformation of the track, small lateral stiffness, and low damping ratio, which leads to a large dynamic displacement of the floating plate and an increase in

The addition of wheel rail force resulted in an excessive level of vibration acceleration transmitted to the tunnel wall.

Nonlinear steel springs, through nonlinear damping, improve the isolation effect by providing small damping before the vehicle reaches the floating plate. When the vehicle is on the plate, large damping reduces dynamic displacement, reduces wheel rail force, and thus reduces tunnel wall acceleration.

Composition and material technical specifications of nonlinear damping steel spring isolators

The nonlinear damping steel spring isolator consists of a steel spring, an outer sleeve, an inner cylinder upper cover plate, a base, a damping plate, a height adjusting gasket, a rubber sealing ring, a damping agent, and other parts.

3. Testing of nonlinear damping steel spring isolators

Vibration isolators need to undergo factory inspection before leaving the factory. The testing content includes:

(1) Effective dimensions of each part of the damper: not exceeding ± 2mm of the product design value;

(2) The surface of the damper should be flat, without mechanical damage, rust, or burrs;

(3) Static stiffness testing;

(4) Damping coefficient test.