Results 1 to 10 of about 24,296 (271)

Fatigue analysis of railway catenary dropper based on its stress incorporating displacement loading and fluctuating wind load. [PDF]

Sci Prog
In this paper, a simple chain suspension catenary model is constructed. The acting force of pantograph is reduced to a displacement loading. The stress and fatigue life of railway catenary dropper incorporating displacement loading and fluctuating wind ...
Pan L, Yang C, Shen X, He F, Zhu X, Zhao Y, Yuan Y, Zhao Q, Meng Q, Dong B, Guo X.   +10 more
europepmc   +2 more sources

The dropper stress characteristics under different moving load speeds for a high-speed railway. [PDF]

Heliyon
Dropper failure seriously threatens the operation safety of a high-speed railway. In this work, for a simple chain suspension catenary, one span with five droppers is performed to establish a model and thus the effects of the moving load speed on dropper
He F, Shen X, Guo D, Chen L, Pan L.
europepmc   +2 more sources

YOLOv5s-D: A Railway Catenary Dropper State Identification and Small Defect Detection Model

Applied Sciences, 2023
High-speed railway catenaries are vital components in railway traction power supply systems. To ensure stable contact between the pantograph and the catenary, droppers are positioned between the messenger wire and contact line. The failure of one or more
Ziyi Li, Zhiqiang Rao, Lu Ding, Biao Ding, Jianjun Fang, Xiaoning Ma   +5 more
semanticscholar   +1 more source

Study on numerical simulation method and dynamic force of dropper of a catenary system

Advances in Mechanical Engineering, 2023
The dropper through bends and bears dynamic impact load before and after the train passes in actual service, which has an important impact on the fatigue life of the dropper.
Like Pan, Liming Luke Chen, Haibo Zhang, Tong Xing, Caizhi Yang, Guankuo Dong   +5 more
semanticscholar   +1 more source

Interpretive modelling of boron transport in the boundary plasma of WEST experiments with the impurity powder dropper

Nuclear Fusion, 2023
Boron (B) powder injection is a potential alternative to glow discharge boronization as a wall conditioning method for tokamaks. This technique is currently being studied in WEST experiments, during which B powder is injected by an Impurity Powder ...
K. Afonin, A. Gallo, Y. Marandet, Philippe Moreau, G. Bodner, H. Bufferand, G. Ciraolo, Corinne Desgranges, P. Devynck, A. Diallo, J. Gaspar, C. Guillemaut, R. Guirlet, J. Gunn, N. Fedorczak, T. Loarer, R. Lunsford, P. Manas, F. Nespoli, N. Rivals, P. Tamain, E. Unterberg   +21 more
semanticscholar   +1 more source

Continued atmospheric electric field measurements following cessation of the long‐term water dropper potential equalizer at Kakioka, Japan

Geoscience Data Journal, 2023
Surface atmospheric electric field (AEF) measurements were conducted using a Kelvin water dropper equalizer by the Japan Meteorological Agency's geomagnetic observatory at Kakioka, Ibaraki Prefecture, Japan, from 1929 to February 28, 2021.
Masashi Kamogawa, Tomoyuki Suzuki, Yasuhiro Minamoto, Toshiyasu Nagao, Tetsuya Kodama, H. Fujiwara, Takeshi Kudo   +6 more
semanticscholar   +1 more source

Highlighting the Microbial Contamination of the Dropper Tip and Cap of In-Use Eye Drops, the Associated Contributory Factors, and the Risk of Infection: A Past-30-Years Literature Review

Pharmaceutics, 2022
The sterility of eye drop content is a primary concern from manufacturing until opening, as well as during handling by end users, while microbial contamination of the dropper tip and cap are often disregarded. The contamination of these sites during drug
Katia Iskandar, L. Marchin, L. Kodjikian, Maxime Rocher, C. Roques   +4 more
semanticscholar   +1 more source

Cost-based burst dropping strategy in optical burst switching networks [PDF]

, 2005
Optical burst switching (OBS) is a new paradigm for future all-optical networks. Intentional burst dropping is one of techniques used to achieve desired quality of service. In this paper we note that some bursts are more likely to cause contention.
Barry, Liam P., Klusek, Bartlomiej, Murphy, John   +2 more
core   +1 more source

Hydrodynamic coefficients of mussel dropper lines derived from large-scale experiments and structural dynamics

Journal of Ocean Engineering and Marine Energy, 2023
The expansion of marine aquaculture production is driven by a high market demand for marine proteins and a stagnation of wild catch of fish. Bivalve farming, i.e., the cultivation of oysters, mussels and scallops, is an important part of the ongoing ...
Jannis Landmann, Christian Flack, Ursula Kowalsky, R. Wüchner, A. Hildebrandt, N. Goseberg   +5 more
semanticscholar   +1 more source

Analysis of Dropper Stress in a Catenary System for a High-Speed Railway

Mathematical Problems in Engineering, 2022
When the pantograph slides over the contact wire at a high speed, there are cyclic stresses acting on droppers. The cyclic stresses are related with the fatigue life and fracture of the dropper. Thus, the stress calculation of the dropper is particularly
Liming Luke Chen, Juan Sun, Like Pan, F. He   +3 more
semanticscholar   +1 more source