Floating slab track insertion loss
WebThe insertion loss due to the attachment of DVAs increases as the mass ratio increases, whereas it decreases with the increase in the damping ratio of steel-springs. This study aims to effectively and robustly suppress the low-frequency vibrations of floating slab tracks (FSTs) using dynamic vibration absorbers (DVAs). WebJan 1, 2024 · The effect of track vibration mitigation is usually described by insertion loss (IL). IL can typically be obtained by impulse tests in laboratories. To investigate the influences of preloads on IL, a dynamic laboratory experiment was performed on a floating ladder track. ... Effectiveness of the floating slab track system constructed at Konya ...
Floating slab track insertion loss
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WebJan 11, 2024 · Insertion gain is the vibration level in decibels with the floating slab track relative to the vibration level for direct fixation track and is the inverse of insertion loss. … WebMar 1, 2024 · An insertion loss model for evaluating the performance of floating-slab track for underground railway tunnels. In: Proceedings of the tenth international congress on sound and vibration. international institute of acoustics and vibration , Stockholm, Sweden, 2003, pp.419–426.
WebMay 20, 2024 · Figure 8 illustrates the predicted insertion gain of the floating slab track, calculated as the difference between the curves shown in Fig. 7. The insertion gain is almost 20 dB at the design resonance frequency of 5.5 Hz, is slightly negative at 9 Hz, and approximates that of a single-degree-of-freedom oscillator at frequencies above 10 Hz. WebMay 18, 2024 · Purpose: Steel-spring-floating slab tracks are widely used in subway lines. It is necessary to analyze and study the vibration damping and transmission …
WebJun 27, 2014 · The reasonable values for the steel spring floating slab track should meet the requirements of 50–120 MN/m and ≥30 kN·s/m for rail pad stiffness and damping, 5–10 MN/m and 50–100 kN·s/m for isolator stiffness and isolator damping, and 1.25 m for isolator spacing, in order to achieve the satisfactory effect of vibration reduction. WebSep 1, 2024 · Insertion loss of the line source transfer mobility in (a) the x-direction and (b) the z-direction on the free surface (y = 0 m and z = 0 m) at x = 10 m and x = 20 m from …
WebNov 10, 2024 · Insertion loss with different initial distances (a) ... On vehicle/track impact at connection between a floating slab and ballasted track and floating slab track's effectiveness of force isolation. Vehicle Syst. Dyn., 47 (5) (2009), pp. 513-531. CrossRef View in Scopus Google Scholar
WebThe track irregularities are included and generated by means of a time–frequency transformation technique. The effect of the DVAs on the vibration absorption of the FST … ithink webinarsWebOptimizing the stiffness of the damping pad to reduce environmental vibration and structural noise has been extensively studied. Vogiatzis and Kouroussis [11,12] established a finite element (FE) model for the DPFST of the Athens Metro to study and improve the vibration reduction effect (VRE) of the track system.Jin [] combined the vehicle–floating slab … neff s153itx05e testWebNov 8, 2024 · The rigid vehicle and the flexible track (rail track and floating slab) were established in UM to simulate the dynamic responses of the wheel-rail coupled system, as seen in Fig. 4. The vehicles were modeled with a mass-spring system that consisted of one car body, two bogies, and four wheels, all of which were rigid bodies that were connected ... i think we all thinkWebhave a strong impact to the insertion loss of the MSS. GEIER, WENZEL 3 rail pad baseplate pad elastic bearing for slab track ballast mat sleeper pad Figure 2. Elasticity in railway superstructures The insertion loss ∆L E is defined as the difference of the noise and ... solid roadway below a floating slab track. The last one mentioned are ... neff s153itx05g manualWebThe main parameters of each part are as follows: (1) Floating track slab. In order to meet the requirements of on-site construction and in-service maintenance, the track structure … neff s153itx05eWebMay 26, 2014 · In practice around the world, FST is applied with a variety of different slab lengths; for example, a medium-size floating slab track with a length of 20.5 m per slab is used on the Korean high-speed railway and a mini-type floating slab with a length of 2.65 m per slab is used in Hong Kong. 23 The bending resonance frequencies of the slab ... neff s153hax02gWebJan 8, 2024 · 4.2.1 Rail enhancements. The irregularity in the track and the ballast can be an important source of vibration. Indeed, a good track alignment can provide a 10 dB reduction for the ground-borne noise for speeds at 320 km/h, therefore, maintenance to the rail plays an important role in the vibration mitigation. i think we are alone frantic assembly review