Print Email Facebook Twitter Sensitivity analysis of railpad parameters on vertical railway track dynamics Title Sensitivity analysis of railpad parameters on vertical railway track dynamics Author Oregui Echeverria-Berreyarza, M. (TU Delft Railway Engineering) Nunez, Alfredo (TU Delft Railway Engineering) Dollevoet, R.P.B.J. (TU Delft Railway Engineering) Li, Z. (TU Delft Railway Engineering) Date 2016 Abstract This paper presents a sensitivity analysis of railpad parameters on vertical railway track dynamics, incorporating the nonlinear behavior of the fastening (i.e., downward forces compress the railpad whereas upward forces are resisted by the clamps). For this purpose, solid railpads, rail-railpad contact and preloaded springs are defined in a three-dimensional (3D) finite-element track model. In addition, railpads are modeled as Prony series so that measured frequency-dependent railpad properties for different clamp toe load, temperature, aging, and railpad type are considered. Through sensitivity analysis using time-domain and frequency-domain responses, the influence of the railpad parameters on the global track response is investigated. Railpad type, toe load and aging are identified as the most relevant parameters in the frequency range of 300-3,000 Hz. Furthermore, the information obtained over track response changes due to fastening loosening and railpad wear could be used for monitoring the condition of fastenings. Subject Vertical railway track dynamicsfrequency dependent railpad propertiesFastening, sensitivity analysisfinite element model To reference this document use: http://resolver.tudelft.nl/uuid:213a6204-91d4-49c4-a657-216fb3d366d1 DOI https://doi.org/10.1061/(ASCE)EM.1943-7889.0001207 ISSN 0733-9399 Source Journal of Engineering Mechanics, 143 (5) Part of collection Institutional Repository Document type journal article Rights © 2016 M. Oregui Echeverria-Berreyarza, Alfredo Nunez, R.P.B.J. Dollevoet, Z. Li Files PDF Oregui_et_al_AJEM.pdf 1.45 MB Close viewer /islandora/object/uuid:213a6204-91d4-49c4-a657-216fb3d366d1/datastream/OBJ/view