نتایج جستجو برای: track level irregularity
تعداد نتایج: 1139313 فیلتر نتایج به سال:
The aim of this study was to evaluate the relationship between the tongue volume and lower incisor irregularity, using cone-beam computed tomography (CBCT), and to identify the possible gender differences. CBCT images of 60 patients between 16 and 36 years of age were selected from 1400 sets of images in the database. Tomography was carried out using iCAT® (Imaging Sciences International, Hatfi...
While the track irregularity in turnout areas has a significant impact on wheel-rail contact, driving safety, and stability, of front incoming vehicles is often overlooked. This paper fills gaps study. As result, rigid-flexible coupled dynamic model vehicle developed. The effect various irregularities performance at high speeds been investigated based random sampling method. results show that d...
To investigate the influence of structural deformation wheelset and track on rail wear in longitudinal lateral directions, a prediction model is established that can calculate three-dimensional distribution wear. The difference between multi-rigid-body dynamic rigid-flexible coupled model, which considers flexibility track, compared terms results show distributions predicted by two models are r...
Railway tracks undergo plastic settlement when subject to repeated train loading. This occurs differentially along the track rather than in a uniform manner, and profile is key parameter scheduling maintenance operations. Therefore this paper presents novel numerical approach predict irregularity evolution. The model combines empirical laws with finite element theory, where track-ground structu...
According to the structure characteristics of railway viaduct with light floating slabs, a frequency domain dynamic model of the vehicle-light floating slab track-viaduct bridge vertical coupling system is established. The Green functions are used to quickly calculate the receptance response of the system, and then the pseudo excitation method is used to further analyze the parameter influences...
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