Study on Reasonable Fastener Stiffness of Ballastless Turnout's Vibration Decrease and Noise Reduction of 350 km/h Passenger Dedicated Line

Abstract

With the large-scale construction of passenger dedicated line, more and more ballastless turnouts were laid as the important infrastructure of passenger dedicated line, and the fastener stiffness of it influenced the vibration and noise of the track. Using the vehicle-turnout coupling dynamic analysis created the method for determining the reasonable fastener stiffness of ballastless track turnout to analyse mutative fastener stiffness's impact on the vibration and noise. Then from three parts of the excitation of wheel-rail roughness, the sound radiation efficiency and the calculation of wheel-rail radiated noise, the noise prediction method for ballastless turnout was stated. Using the above methods, The reasonable fastener stiffness of ballastless turnout can be obtained. The results showed that the stiffness of 25 kN/mm to the fastener of ballastless turnout was reasonable for vibration decrease and noise reduction.

Vibration mitigation design and effect prediction of ballast turnout in metro depot

“…The vibration mitigation methods of main line track have gradually matured, but for the turnout, the vibration mitigation methods mainly include bed and fastener. However, the floating slab structure is complex, high cost and repair inconvenience, and the vibration mitigation fasteners do not facilitate the unification of the rail technical standards [2] . In view of the shortcomings of existing vibration mitigation methods, most metro depots use ballast bed.…”

Study on Precast Slab Track for Taiwan High Speed Rail

“…The length of THSR track project is approximately 345 km. Although there are some strategies to reduce vibration decrease and noise reduction [6], the full length of THSR track project is 345 km and except for the Taipei underground section, the remaining project of approximately 330 km is contracted to TST JV (Taiwan Shinkansen Track Joint Venture). The Sumitomo Mitsui is the covendor of TST JV, which is in charge of manufacturing of all slabs.…”