Effect of surface micro-grooved textures in suppressing stick-slip vibration in high-speed train brake systems

Efficient strategies for controlling low-frequency stick-slip vibrations during high-speed train braking are crucial for safe operations. This study applies surface texturing with micro-grooved textures on friction blocks and conducts tests to validate their suppression effect on stick-slip vibrations. Vibration analysis indicates that micro-grooved textures effectively mitigate system vibration intensity, decreasing amplitude and stick time as texture area density increases within a certain range. Further analysis reveals that these textures improve the contact behavior at the disc-block interface, reducing eccentric wear angle and contact plateau size. Changes in contact characteristics result in variations in the vibration response, thereby suppressing stick-slip vibrations. The research establishes a solid theoretical foundation and offers practical recommendations for reducing stick-slip vibrations in high-speed train brake systems.