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Steel and Composite Structures Volume 37, Number 4, November25 2020 , pages 493-501 DOI: https://doi.org/10.12989/scs.2020.37.4.493 |
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Optimization of a composite beam for high-speed railroads |
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Vladimir Y. Poliakov and Vasyli V. Saurin
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Abstract | ||
The paper describes an optimization method based on the mathematical model of interaction within multibody 'bridge-track-cars" dynamic system. The interaction is connected with considerable dynamic phenomena influenced by high traffic speed (up to 400 km/h) on high-speed railroads. The trend analysis of a structure is necessary to determine the direction and resource of optimizing the system. Thus, scientific methods of decision-making process are necessary. The process requires a great amount of information analysis dealing with behavior and changes of the "bridge-track-cars system" that consists of mechanisms and structures, including transitions. The paper shows the algorithm of multi-criteria optimization that can essentially reduce weight of a bridge superstructure using big data analysis. This reduction is carried out in accordance with the constraints that have to be satisfied in any case. Optimization of real steel-concrete beam is exemplified. It demonstrates possibility of measures that are offered by the algorithm. | ||
Key Words | ||
high-speed railroads; bridges; composite structures; multibody dynamics; optimal design | ||
Address | ||
Vladimir Y. Poliakov: Bridges and Tunnels Department, Russian University of Transport, Moscow, Russia 9b9, Obrazcova Street, Moscow Russia Vasyli V. Saurin: Institute of Problems of Mechanics, Russian Academy of Sciences, 101, Pr. Vernadskogo, Moscow, Russia | ||