Medium Vibration Damping Fasteners

APPLICATION SCENARIOS

1. At the connections between railway sleepers and rails, buffering vibrations from train operation  

2. In urban rail transit lines, reducing track noise and structural fatigue  

3. In elastic track systems of high-speed railways, enhancing riding comfort  

4. During track maintenance and replacement, ensuring the elasticity and stability of fasteners

Product Description

This fastener adopts a nonlinear vibration damping structure consisting of a single-layer backing plate + double-layer rubber pads, achieving a moderate vibration damping effect of 6-8dB, while compressing the overall structural height to a minimum of 37mm. It can directly replace ordinary fasteners on existing lines without modifying the track foundation, significantly reducing the cost and construction period of track upgrading.

PRODUCT FUNCTION

Efficient vibration suppression:  

Double-layer nonlinear rubber layers (thermoplastic rubber + natural rubber composite) achieve synergistic energy dissipation, reducing vibration transmission of sleepers by 6-8dB.  

Ultra-thin engineering adaptation:  

With an ultimate structural height of 37mm, it is compatible with various fastener systems of existing lines.  

Non-destructive replacement and upgrading:  

Bolt positioning holes fully match existing fasteners, enabling vibration damping improvement with zero foundation modification.  

Triple safety guarantees:  

Pre-compression technology for rubber layers ensures controllable long-term creep; metal backing plates provide rigid support; anti-eccentric load capacity is increased by 30%.

PERFORMANCE INDEX

Vibration damping level: Medium vibration damping (insertion loss 6-8dB)  

Structural height: 37mm~42mm (compatible with conventional fastener space)  

Core structure: Single-layer steel plate backing + double-layer thermoplastic/natural rubber composite damping layer  

Service life: 25 years (trackside environment, -40℃~80℃ working conditions)  

Dynamic characteristics: Dynamic-static stiffness ratio ≤1.4, deformation ＜5% after 3 million fatigue cycles  

Environmental certification: Compliant with EN 14080 fire safety standards, passed RoHS/REACH

APPLICATION AREA

Metro renovation projects: Vibration damping upgrading of existing tunnel lines (directly replacing original fasteners)  

Urban light rail systems: Load reduction and noise control for elevated section bridges  

Heavy-haul railways: Vibration energy dispersion of tracks in freight hubs  

Station throat areas: Protection of vibration-sensitive equipment in switch areas  

Track vibration damping transition sections: Buffer zones connecting ordinary ballast beds and vibration damping ballast beds