Influence of Sleepers Shape and Configuration on Track-Train Dynamics

Abstract

The paper is devoted to the study of dynamical behaviour of railway tracks as continuous systems (rails) supported by periodically spaced sleepers and subjected to moving concentrated loads. Several cases of dynamical problems, where elastically supported beams are excited by a moving concentrated force, are considered. In particular, the study is focused on interactions with structure periodic in the space. Results on one-dimensional structures are extended to the case of a two-dimensional system. The problems of stopping bands, passing bands, and mistuning are also mentioned.

Adaptive Damping of a Double‐Beam Structure Based on Magnetorheological Elastomer

“…e detailed parameters of the test stand (see Figure 18) used in the investigations are listed in Table 4 mitigating the structural vibration. erefore, in the present work, rather than performing a comprehensive control analysis, we limit our attention to the most typical cases of free vibration, where the de ections of the cantilever structure are concerned with the shape of its rst natural mode W 1 , as de ned in (13). For this purpose, we carried out control experiments assuming the following initial state condition: w 1,2 (ξ, 0) 50W 1 (ξ)/W 1 (L) (mm).…”

“…e state-feedback switched controller (20) relies on the measurements of two displacements w 1 (0.5(ξ s1 + ξ s2 ), t) and w 1 (0.5(ξ s3 + ξ s4 ), t) estimated by the two pairs of the laser sensors. ese two measurements have been used to reconstruct the generalized coordinates T 1 1 (t) and T 1 2 (t) by using (12) and (13). For simplicity, we assume w 2 (0.5(ξ s1 + ξ s2 ), t) w 1 (0.5(ξ s1 + ξ s2 ), t) and w 2 (0.5(ξ s3 + ξ s4 ), t) w 1 (0.5(ξ s3 + ξ s4 ), t), and consequently T 2 1 (t) T 1 1 (t) and T 2 2 (t) T 1 2 (t).…”

“…ey are classified as intelligent materials well suited for providing effective structural control. ey possess tunable rheological properties and can be used in adaptive structures for aerospace [9], automotive [10,11], railway [12,13], civil [14], and electrical engineering applications for linear and rotational motion and vibration control [15,16].…”

Stress analysis of rigid hanger of railway arch bridge based on vehicle-bridge coupling vibration

“…In addition, due to dynamic action of the vehicle, the vibration of bridges may lead to the fatigue of structure components [6][7][8]. As railway transportation has the characteristics of heavy loads and obvious vehicle-induced vibration, the large structural stiffness and high durability of both overall structure and components are often required [9][10][11]. Flexible hanger, commonly used in highway arch bridges, are limited in the application to railway arch bridges, for the disadvantages of small stiffness, easy corrosion and needing to be replaced.…”

The Performance Evaluation of Circular Flange Bolted Connection in Ultra High Performance Fiber Reinforced Concrete Segmented Communication Tower

“…The connection is composed of two steel flanges, welded to the structural tubes, and then connected together with pre-tensioned bolts. Also, Bogacz et al [16] studied bolt connections in rail engineering. Stocki et al [17] deliberated on the reliability challenges of spot weld joints for structural use in the automotive industry while the behavior of bolted flange connections under loadings of both cyclic and monotonic nature is also explained by Van-Long et al [18].…”