Browsing by Author "Kuka, Naim"
Now showing 1 - 2 of 2
Results Per Page
Sort Options
- Impact of maintenance conditions of vehicle components on the vehicle–track interaction loadsPublication . Kuka, Naim; Verardi, Riccardo; Ariaudo, Caterina; Pombo, JoãoTo improve the efficiency and competitiveness of railway transport, passenger and freight trains should travel faster and have increased payload, without losing the necessary levels of running safety and ride comfort, as well as assuring low aggressiveness on track and minimising the life cycle costs. Hence, the manufacturer’s challenge consists of improving the dynamic performance of the railway vehicles and reducing the loads on the track as well as on the rolling stock components. These objectives can be achieved through optimizing the design of the vehicle, while taking into consideration that the characteristics of the vehicle and of the track may change over time and space, and that they depend on the maintenance conditions of the vehicle and of the infrastructure. This work proposes a computational methodology to study how the varying vehicle component characteristics, on normal and degraded conditions, impact on the vehicle/track interaction loads and on the track damage. The purpose of this study is to trace a path towards a realistic definition of a load mission profile for the structural fatigue dimensioning of the vehicle components. The assessment criteria and the evaluated quantities are defined according to the EN14363 regulation.
- Influence of track design and health conditions on the vehicle-track interaction loadsPublication . Kuka, Naim; Ariaudo, Caterina; Pombo, João; Verardi, RiccardoThe geometry and quality of typical Conventional Lines (CL) and High Speed Lines (HSL) have a fundamental impact on the dynamics performance of the running vehicles and on the loads exchanged between the vehicle and the track. For a given service, a careful analysis of the operation conditions is required in order to design a track friendly vehicle. To this end, Alstom has developed and validated reliable simulations methodologies and tools for the analysis of the complex vehicle-track multi-physic systems. The use of simulation tools for the analysis of the influence of the mission profile of the train and the maintenance condition of the track, with some hints for improvement of maintenance criteria, will be the objective of this paper.