Rails are exposed to moisture and oils, acids and alkali that are always present in the air. Frequently there are stresses occurring under the action of deformation of crushed stone pad, crossties, and soil itself, residual thermal stresses, strength heterogeneity and so on. Local and extended rail surface irregularities occur, there are uneven joints, there is presence of ice, snow, and water facilitating occurrence of additional loadings. Such complex impact results in rails accumulation of fatigue and thermal damages, giving birth to intercrystalline corrosion. Both surface and internally located defects appear, which redistribute mechanic stresses inside rails and break their heterogeneity. This frequently leads to their destruction resulting in huge material and human losses. For instance, about 30% of all accidents that happen in railroads of the country occur specifically because of rails breaks. At present NPP 'VIGOR' has completed and is carrying out operation testing of Automated Software & Hardware Complex for Registration, Storage, and Processing of Signal from Finders of Defectoscope Car, Defectoscope Road Car - Poisk-2000. It surpasses, in terms of its parameters and capabilities, all existent system of similar purpose (such as Poisk-20 SAROS - VIP, AVICON-03', ECHO-R-CRUZ and others). In connection with wide application of mathematical methods of control and processing of information, the combined types of road cars and defectoscope cars use software versions allowing comparison of a doubtful area versus the results of previous trip (SAROS - version 3.3; VIP - version 6.4). These versions permit assessing changes in defect sizes over the time period elapsed since the last previous trip, hence, increasing reliability and efficiency of inspection results.
Analysis and review of NDT instruments used for rails inspection at Russian railway roads
Analyse und Übersicht von ZfP-Geräten für die Schienenprüfung an russischen Eisenbahngleisen
2006
8 Seiten, 8 Bilder
Aufsatz (Konferenz)
Datenträger
Englisch
Reclaiming used rails on paulista railway, Brazil
Engineering Index Backfile | 1942
|Tema Archiv | 2000
|Engineering Index Backfile | 1895
Engineering Index Backfile | 1922
Engineering Index Backfile | 1922