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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
 


Optimization of a composite beam for high-speed railroads
Vladimir Y. Poliakov and Vasyli V. Saurin

 
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
 

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