The compatibility of the material selection of the underrail pad plate with the vibration and noise reduction of the line
What are the advantages of rubber pads in ordinary circuits?
Rubber pads have good elasticity and low cost. They can effectively absorb the impact of wheels and rails, reducing vibration and noise. It has strong adaptability and can meet the vibration reduction requirements of the foundation for conventional railways and urban rail transit. It is the most widely used type of pad.
Why are polyurethane pads suitable for high-speed lines?
Polyurethane pads have stable elastic modulus, are resistant to aging and wear, and are not prone to deformation under high-speed and high-frequency loads. Its vibration damping performance is long-lasting, which can maintain the smoothness of the track for a long time and reduce the impact damage to the fasteners and rails.
What are the application characteristics of composite pads in complex environments?
The composite pad combines the advantages of rubber and polymer materials, featuring both high elasticity and high strength. In structurally sensitive sections such as Bridges and tunnels, it can effectively reduce vibration transmission and protect buildings and equipment along the line.
What impacts will the aging of the pad material have on the track?
Aging can cause the pad to become hard, crack and lose elasticity, resulting in a significant decline in vibration damping effect. This will intensify the wheel-rail impact, accelerate the loosening of fasteners and the damage of sleepers, and increase the maintenance cost and safety hazards of the lines.
How to choose the appropriate pad material according to the type of line?
Low modulus rubber pads should be selected for urban residential areas. Polyurethane composite pads are selected for high-speed elevated roads. For heavy-duty lines, choose high-wear-resistant composite pads. Moisture-proof and anti-corrosion materials are selected for the tunnel, taking into account both vibration reduction and service life.