Simulationsunterstützte kalibrierung eines messradsatzes
Başlık çevirisi mevcut değil.
- Tez No: 645661
- Danışmanlar: DR. UDO HANTKE, DR. JAN WELTE
- Tez Türü: Yüksek Lisans
- Konular: Makine Mühendisliği, Mechanical Engineering
- Anahtar Kelimeler: Instrumented wheelset, Strain Gauge, Wheel-Track-Forces, Rail Vehicle Dynamics, Wheel Contact Point
- Yıl: 2017
- Dil: Almanca
- Üniversite: Technische Universität Carolo-Wilhelmina zu Braunschweig
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 115
Özet
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Özet (Çeviri)
Any information on the wheel-rail interaction is a significant factor for improving the driving status of rail vehicles and contributes scientists to design safe and comfortable ones. One of the most sufficient ways to measure the wheel rail forces is through the instrumented wheelset. The quality of the manufacture and measuring mostly depends on the experience of the workers and the heuristic method. Wheel sets have also different drive and deformation behaviors which add to the difficulty of their production. Aiming to propose optimization of the sensor positions as well as of the wiring diagrams and the different calculation algorithms for each wheel set type, the study analyzes two types of wheel sets under different load combinations by the finite element method. The results of the analysis show that the wheel set with a curved web is more sensitive to the vertical wheel contact force than the wheel set with a straight web. In addition, the forces crosstalk when the train turns. Therefore, one of the following measures should be taken: either the other forces must be eliminated while a force is being measured or a place on the wheel way must be found that is the most sensitive to a force. In the present study both methods have been carried out for the wheel set with a straight bridge. Through the optimized sensor positions and with the aid of linear equations, it has been proved that the position of the wheel contact point and the driving forces, as well as the guide and wheel contact force, can be calculated. Because of the deformations due to the thick track rim and the non linear additional surface inertia on both sides of the wheel disc, the best sensor positions must be found in a way that determines a linear relationship between the forces. Furthermore, for the wheel set with a curved web, the driving forces can be calculated independently of the position of the sensors by means of a super ordinate linear system of equations, since the superficial strains in the curved web on the two sides of the wheel web occur homogeneously and linearly at each point. The current study describes the two calculation algorithms and provides the basis for future work on measuring wheel sets