The main function of using spring dampers on mechanical equipment is to isolate the transmission of vibration, so that the vibration of the vibrating body is not transmitted to the isolated object, which can reduce the interference and noise generated by equipment vibration on the surrounding environment. The spring isolation system consists of springs, damping, and mass, with springs (generally referring to) and damping being key components of the elastic foundation. Steel spring isolators have low system frequency, high elasticity, large bearing capacity, accurate parameters, and long service life, making them ideal vibration reduction and isolation products. The natural frequency of elastic foundation is between 2 and 5Hz, and the frequency ratio should be greater than 3. It has high isolation efficiency and can generally attenuate by more than 80%. Elastic foundation is basically maintenance free, once installed, has no operating costs, and is sturdy and durable.

With the rapid development of urban rail transit, while solving the problem of traffic congestion in densely populated urban areas, it has also caused vibration effects on the surrounding environment of the rail. In order to solve the above problems, steel spring isolators and steel spring floating plate vibration reducing tracks have been proposed under the track bed. Product structure: (1) Outer sleeve: Generally composed of metal materials, poured into floating slab concrete, it is a force transmission device between the floating slab and the inner sleeve of the isolator. (2) Inner sleeve: composed of steel springs and damping agents, it is the core component of the vibration isolator. (3) Level the steel plate. The outer sleeve is embedded in the concrete track plate, and the load of the track plate is transmitted to the inner sleeve through the height adjustment and locking device. The metal spring in the inner sleeve provides elasticity in the floating plate system. The mass of the track plate and the elasticity of the metal spring can convert some vibration energy, reducing the transmission of vibration generated by train operation to the lower foundation.