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Robustness analysis of bogie suspension components Pareto optimised values

Seyed Milad Mousavi Bideleh (Institutionen för tillämpad mekanik, Dynamik)
Vehicle System Dynamics (0042-3114). (2017)
[Artikel, refereegranskad vetenskaplig]

Bogie suspension system of high speed trains can significantly affect vehicle performance. Multiobjective optimisation problems are often formulated and solved to find the Pareto optimised values of the sus- pension components and improve cost efficiency in railway opera- tions from different perspectives. Uncertainties in the design param- eters of suspension system can negatively influence the dynamics behaviour of railway vehicles. In this regard, robustness analysis of a bogie dynamics response with respect to uncertainties in the sus- pension design parameters is considered. A one-car railway vehicle model with 50 degrees of freedom and wear/comfort Pareto opti- mised values of bogie suspension components is chosen for the anal- ysis. Longitudinal and lateral primary stiffnesses, longitudinal and vertical secondary stiffnesses, as well as yaw damping are considered as five design parameters. The effects of parameter uncertainties on wear, ride comfort, track shift force, stability, and risk of derailment are studied by varying the design parameters around their respec- tive Pareto optimised values according to a lognormal distribution with different coefficient of variations (COVs). The robustness anal- ysis is carried out based on the maximum entropy concept. The multiplicative dimensional reduction method is utilised to simplify the calculation of fractional moments and improve the computa- tional efficiency. The results showed that the dynamics response of the vehicle with wear/comfort Pareto optimised values of bogie sus- pension is robust against uncertainties in the design parameters and the probability of failure is small for parameter uncertainties with COV up to 0.1.

Nyckelord: Robustness analysis; bogie; suspension; optimisation; M-DRM; probability density function



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Denna post skapades 2017-03-15. Senast ändrad 2017-03-15.
CPL Pubid: 248573

 

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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Dynamik (1900-2017)

Ämnesområden

Transport
Hållbar utveckling
Maskinteknik
Fastkroppsmekanik
Farkostteknik

Chalmers infrastruktur