Floating slab track insertion loss

Author: tsyi

August undefined, 2024

WebFloating slab (FS) track solutions were then evaluated at COs locations ensuring a complete ground-borne vibration attenuation with an insertion loss of −20 dB V with respect to the predominant excitation (40–125 Hz). The relevant in situ measurement campaign regarding both the dynamic characteristics of FS and the vibration velocity at … WebNov 11, 2008 · In 2006, Lombaert et al. [16] developed a numerical model to investigate the reduction of free field vibrations by means of a floating slab track. They focused on the …

UM-SIMULINK Co-simulation for the vibration reduction …

WebOptimizing 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 … 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 … cypert insurance rockwall

Vibration transfer from slab tracks on piled foundations

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. … Webhave 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 ... WebSep 2, 2015 · Low-frequency vibration control of floating slab tracks using dynamic vibration absorbers, V ehicle System Dynamics: International Journal of V ehicle … bim stainless shelf

Railway ground vibration and mitigation measures ... - Springer

TID隔振器浮置板轨道低频减振特性研究

WebApr 13, 2024 · As a type of track solution, the floating slab track (FST) has been proven to be the most effective. Springs or resilient mats can be installed under the slab, forming a mass-spring system. A large number of scholars have carried out theoretical and experimental research on a steel spring FST [8,25,26,27,28]. The FST with a slab mat … WebMay 20, 2024 · The insertion loss of the floating track slab system measured in situ was referred to a ballasted track located next to the 192 m long floating track slab system section, demonstrating that the effectiveness of the system is even better than the predicted insertion loss during the design phase of the system track. According to the verification ... bim stages consist ofWebJan 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. bim standard formulation

"WebMay 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 ... " - Floating slab track insertion loss

Floating slab track insertion loss

Influence of static preload on vibration reduction effect of …

WebThe 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 … http://pipmodel.eng.cam.ac.uk/ICSV10_mfmh2.pdf

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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. http://www.vce.at/sites/default/files/uploads/downloads/2002_mass-spring-systems.pdf

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. WebThe idea is to support the main track slab on rubber blocks, steel springs or a continuous sheet of rubber. A typical cross-section of the underground-tunnel is shown in Figure 1 …

Web为了实现对地铁低频环境振动的控制，提出了一种基于TID(Tuned inerter damper, 调谐惯容阻尼器)的浮置板板下隔振器，并以此形成新型浮置板轨道结构。分别探究了TID隔振器浮置板轨道的低频弹性波传播特性、简谐点荷载作用下振动特性以及列车荷载作用下减振效果；结合多目标遗传算法，开展了TID参数 ... WebNov 11, 2008 · In 2006, Lombaert et al. [16] developed a numerical model to investigate the reduction of free field vibrations by means of a floating slab track. They focused on the influence of dynamic track–soil interaction on the performance of the floating slab tracks and concluded that the insertion loss varies with stiffness of soil.

WebNov 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 ...

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). bim stage 2 maturity cypert law firmWebSep 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 … bims standardized testWebThe idea is to support the main track slab on rubber blocks, steel springs or a continuous sheet of rubber. A typical cross-section of the underground-tunnel is shown in Figure 1 and consists of the in-tunnel structure (rails, rail-pads, floating-slab). The floating-slab is coupled via slab-bearings to the tunnel wall, which lines a cavity in ... bimssteinpulver apothekeWebThis paper proposes an inerter enhanced dynamic vibration absorber (IDVA) to improve the low-frequency vibration mitigationperformance of the floating slab track (FST). To this … cypern vaccinationWebJun 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. bim stands for whatWebNov 28, 2024 · The vibration reduction effect of railway tracks is described quantitatively by insertion loss (IL). ... the steel spring floating slab track and regular slab track, as a … cypert ridge family practice