Vibration Mitigation Effect Investigation of a New Slab Track Plate Design.

Area of Science:

• Civil Engineering
• Mechanical Engineering
• Materials Science

Background:

• Urban rail transit operations generate significant vibrations.
• Traditional slab track plates have limitations in vibration mitigation.
• Effective vibration control is crucial for passenger comfort and infrastructure integrity.

Purpose of the Study:

• To propose and evaluate a novel vibration mitigation slab track plate design.
• To optimize the material composition for the new slab track plate.
• To compare the performance of the novel design against conventional slab track plates.

Main Methods:

• Laboratory testing to determine the optimal recipe for the novel slab track plate.
• Fabrication and comparative testing of newly designed and normal slab track plates.
• Modal property extraction using the PolyMAX method, including resonant frequencies and damping ratios.
• Definition of a vibration mitigation level (Ls) based on acceleration response.

Main Results:

• The newly designed slab track plate exhibits improved dynamic and damping characteristics.
• The novel design achieved an average vibration mitigation of 8.9 dB in the 20–400 Hz frequency range.
• The PolyMAX method successfully extracted modal properties for performance comparison.

Conclusions:

• The proposed novel vibration mitigation slab track plate design is feasible and effective.
• The new design significantly reduces vibration levels compared to normal slab track plates.
• This innovation holds potential for enhancing urban rail transit systems.