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http://dx.doi.org/10.5762/KAIS.2017.18.3.694

Analysis of Performance Tests and Friction Characteristics of a Friction Type Isolator Considering Train Load Conditions  

Koh, Yong-Sung (Department of Eng. Research, Esco-RTS)
Lee, Chan-Young (Department of Eng. Research, Esco-RTS)
Ji, Yong-Soo (Department of Eng. Research, Esco-RTS)
Kim, Jae-Wang (Technology Research Department, KORAIL Research Institute)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.18, no.3, 2017 , pp. 694-702 More about this Journal
Abstract
In the case of an elevated railway station, structure borne noise and vibration due to structural limitations allow the load and vibration from railway vehicles to be directly transmitted to the station structure, resulting in an increase in the number of civil complaints from customers and staff of the station. The floating slab track system, which is well known as one of the solutions for reducing the noise and vibration from elevated railway stations, usually contains rubber mounts or rubber pads under the railway slab which act as a damper. These types of device have the disadvantage that is difficult to predetermine the exact stiffness and damping ratio under the nonlinear loads resulting from train services. In this study, an isolator with a friction type of wedge is introduced, which can be applied to floating slab track systems and to be designed with precisely the required stiffness. Furthermore, a comparative analysis of the stiffness between the designed and experimental values is carried out, while the damping ratio, which is closely related to the friction wedge blocks, is deduced according to the train load condition. The performance tests of the isolator were conducted in accordance with the DIN 45673-7 standard which includes both static and dynamic load tests. The load conditions for the performance tests are designed to conform to the DIN standard related to the weight of the train and rail track, in order to perform vertical and horizontal load tests, so as to ensure the secure structural safety of the railway. Also, by checking the change aspect of the friction coefficients of the friction elements according to the loading rate, the vibration reduction performance of the friction type isolator with variable loading rate conditions is examined.
Keywords
Damping Ratio; Effective Stiffness; Friction; Isolator; Performance Test; Vibration;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
연도 인용수 순위
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