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The model of the track employs several simplifications; it was implemented in two dimensions on the explicit dynamics module LS-DYNA for the finite element commercial software ANSYS. The design space is formed by the ballast height and by parameters representing the dynamic properties of the rail-pads. The objective function covers minimization of the maximum ascending and descending displacement and velocity in the main structural elements, namely the rail, the sleepers and the ballast. A genetic algorithm implementation is used to optimize these functions, which proved to be effective in finding quasi-optimal solutions with a low search effort. The tools presented can give insight into how the behaviour of the railway track is influenced by various design parameters.<\/jats:p>","DOI":"10.1177\/0954409714537252","type":"journal-article","created":{"date-parts":[[2014,6,7]],"date-time":"2014-06-07T00:31:14Z","timestamp":1402101074000},"page":"345-363","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":2,"title":["Optimization of the behaviour of high-speed railway tracks using a genetic algorithm approach"],"prefix":"10.1177","volume":"229","author":[{"given":"Andr\u00e9 FS","family":"Rodrigues","sequence":"first","affiliation":[{"name":"Department of Civil Engineering, Universidade Nova de Lisboa, Portugal"},{"name":"LAETA, IDMEC, Universidade de Lisboa, Portugal"}]},{"given":"Zuzana","family":"Dimitrovov\u00e1","sequence":"additional","affiliation":[{"name":"Department of Civil Engineering, Universidade Nova de Lisboa, Portugal"},{"name":"LAETA, IDMEC, Universidade de Lisboa, Portugal"}]}],"member":"179","published-online":{"date-parts":[[2014,6,6]]},"reference":[{"key":"bibr1-0954409714537252","volume-title":"The finite element method: linear static and dynamic finite element analysis","author":"Hughes TJR","year":"1987"},{"key":"bibr2-0954409714537252","volume-title":"The design of design: essays from a computer scientist","author":"Brooks FP","year":"2010"},{"key":"bibr3-0954409714537252","unstructured":"Prause RH and Kennedy JC. 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