Results 41 to 50 of about 256,906 (176)

Modeling Friction Performance of Drill String Torsional Oscillation Using Dynamic Friction Model

Shock and Vibration, 2017
Drill string torsional and longitudinal oscillation can significantly reduce axial drag in horizontal drilling. An improved theoretical model for the analysis of the frictional force was proposed based on microscopic contact deformation theory and a ...
Xingming Wang, Ping Chen, Zhenhua Rui, Fanyao Jin   +3 more
doaj   +1 more source

Study on Composed Stiffness of Rail Vehicles Primary Suspension Tumbler Locating

机车电传动, 2013
For calculating stiffness of rail vehicles tumbler locating structure, primary suspension vertical, horizontal and longitudinal dynamic model of tumbler locating were built, composed stiffness calculating formula of which was derived through balanceable ...
DUAN Hua-dong, TAO Gong-an
doaj  

Research on Vehicle Course Stability on Mountain Roads

Journal of Architectural and Engineering Research
This study aims to develop a generalized indicator of vehicle course stability for mountain roads that simultaneously accounts for longitudinal and transverse road slopes, small-radius horizontal curves, the tire–road adhesion coefficient, vehicle ...
Valerik Harutyunyan, Anna Hayrapetyan, Armen Harutyunyan, Karapet Mosikyan   +3 more
doaj   +1 more source

Curvature-induced bunch self-interaction for an energy-chirped bunch in magnetic bends

Physical Review Special Topics. Accelerators and Beams, 2008
Within the realm of classical electrodynamics, the curvature-induced bunch collective interaction in magnetic bends can be studied using effective forces in the canonical formulation of the coherent synchrotron radiation (CSR) effect.
Rui Li
doaj   +1 more source

Influence of Traction Force on Locomotive Wheel-Rail Relationship

机车电传动, 2019
In order to analyze the influence of locomotive traction force on wheel-rail relationship, a locomotive track coupling dynamics model based on 60 kg/m and 60N rail was established in SIMPACK multi-body dynamics software, and the horizontal track and ramp
Xiao WU, Junjun DING, Yunhua HUANG, Fu LI   +3 more
doaj  

Inhomogeneous Gradient Poiseuille Flows of a Vertically Swirled Fluid [PDF]

Journal of Applied and Computational Mechanics
An exact solution is proposed for describing the steady-state and unsteady gradient Poiseuille shear flow of a viscous incompressible fluid in a horizontal infinite layer.
Natalya Burmasheva, Sergey Ershkov, Evgeniy Prosviryakov, Dmytro Leshchenko   +3 more
doaj   +1 more source

Longitudinal shear strength design of composite slabs by full-scale FE modelling considering the embossments

Revista IBRACON de Estruturas e Materiais, 2023
Slabs with cast-in-place steel formwork are composite structural elements composed of concrete and steel. The horizontal shear failure mode is the most common in composite slabs based on numerous experimental studies.
Juçara Hingrid Lima Pinheiro Mello, Dennis Quaresma Pureza, Maurício Prado Martins, Hermano de Sousa Cardoso, Rodrigo de Melo Lameiras, Luis Augusto Conte Mendes Veloso, José Luís Vital de Brito, José Guilherme Santos da Silva, Guilherme Santana Alencar   +8 more
doaj   +1 more source

Impact of starting of tunnel boring machine during construction of connecting channel on existing shield tunnels

Yantu gongcheng xuebao
The impact of starting of tunnel boring machine (TBM) on the deformation of the existing shield tunnels under loads during the construction process of connecting passage by the shield tunneling method is currently unclear.
HUANG Dawei 1, 2, 3 , CHEN Houhong 1, 2, 3, XU Changjie 1, 2, 3, LUO Wenjun 1, 2, 3, GENG Daxin 1, 2, 3, LIU Jiaxuan 1, 2, 3
doaj   +1 more source

Applicability of Strain Gauge Methods for Experimental Determination of Operating Stress of Construction, Road and Agricultural Machines Attached to Tractors

Structural Mechanics of Engineering Constructions and Buildings
The operating stress of construction, road and agricultural machines is determined during experimental and factory tests using force sensors. The aim of the research is to improve the methods of experimental determination of horizontal forces transferred
Aleksey F. Rogachev, Anatoly A. Karsakov, Anatoly A. Martynov   +2 more
doaj   +1 more source

Feasibility of a storage ring for polar molecules in strong-field-seeking states

, 2004
We show, through modeling and simulation, that it is feasible to construct a storage ring that will store dense bunches of strong-field-seeking polar molecules at 30 m/s (kinetic energy of 2K) and hold them, for several minutes, against losses due to ...
Avdeenkov, Bethlem, Bethlem, Bohn, Crompvoets, Crompvoets, G. Lambertson, Gupta, H. Gould, H. Nishimura, J. G. Kalnins, Kajita, Kalnins, Maddi, Nishimura, Nishimura, Tarbutt, Volpi, Weinstein   +18 more
core   +1 more source