The crosswind stability against overturning is a major design criterion for high speed railway vehicles. Due to the increasing interoperability in Europe it has also become an important international task. In recent years efforts have been made to derive an uniform rule in certifying railway vehicles. In this case especially probabilistic methods have been proposed which are common design crite...

Railway crossings are an important source of localized ground vibration. Models required for identifying ways to tackle unacceptable levels vibration from existing as well future railway lines. Yet, the use a prediction model that directly allows non-Hertzian wheel-rail contact dynamics and also includes three dimensional calculations response would be computationally expensive. In order reduce...

In this paper, multi-objective optimization of railway wheel web profile using bidirectional evolutionary structural optimization (BESO) algorithm is investigated. Using a finite element software, static analysis of the wheel based on a standard load case, and its modal analysis for finding the fundamental natural frequency is performed. The von Mises stress and critical frequency as the proble...

This paper presents the modeling of a MEMS based accelerometer in order to detect the presence of a wheel flat in the railway vehicle. A haversine wheel flat is assigned to one wheel of a 5 DOF pitch plane vehicle model, which is coupled to a 3 layer track model. Based on the simulated acceleration response obtained from the vehicle-track model, an accelerometer is designed that meets all the r...

Die Verkehrswende bedingt einen Ausbau des Schienen-Personenverkehrs. Eine in situ Schadenserkennung während Betriebs kann Beitrag zur Kapazitätserhöhung und Sicherheit im Schienenverkehr liefern. Im Vortrag werden Forschungen bezüglich einer schwingungsbasierten, zerstörungsfreien Methode Detektion von Radreifenschäden vorgestellt. Über eine Transferpfadanalyse (TPA) wird auf den Körperschall ...

Sweden is now considering new railway lines typically adapted to high speeds up to 320 km/h. Noise impact from high-speed lines and noise mitigation measures where required becomes urgent to be investigated. As the current calculation model for railway noise used in Sweden is not applicable for the purpose, the Swedish Transport Administration decides to prepare a new noise assessment method fo...