Results 31 to 40 of about 852,934 (411)

Estimates of fishing gear loss rates at a global scale: A literature review and meta‐analysis

open access: yesFish and Fisheries, 2019
Abandoned, lost or otherwise discarded fishing gear (ALDFG) represents a significant, yet ultimately unknown amount of global marine debris, with serious environmental and socioeconomic impacts.
K. Richardson, B. D. Hardesty, C. Wilcox
semanticscholar   +1 more source

Gear Fault Diagnosis Based on Genetic Mutation Particle Swarm Optimization VMD and Probabilistic Neural Network Algorithm

open access: yesIEEE Access, 2020
The decomposition number $K$ and penalty factor $\alpha $ in the variational mode decomposition (VMD) algorithm have a great influence on the decomposition effect and the accuracy of subsequent fault diagnosis.
Jiakai Ding, Dongming Xiao, Xuejun Li
semanticscholar   +1 more source

Effects of Different Hard Finishing Processes on Gear Excitation

open access: yesMachines, 2021
Gearboxes are essential in mechanical drive trains for power transmission. A low noise emission and thus an optimized excitation behavior is a substantial design objective for many applications in terms of comfort and operational safety.
Maximilian Trübswetter   +4 more
doaj   +1 more source

Potential of oil-lubricated cylindrical plastic gears

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2018
Bending strength of injection molded polyacetal test gears is investigated in back-to-back testing using oil-lubrication. To validate state of the art calculation methods, tooth geometries with a variable number of teeth are investigated, maintaining a ...
Christian HASL   +4 more
doaj   +1 more source

The Gap-Tooth Method in Particle Simulations

open access: yes, 2003
We explore the gap-tooth method for multiscale modeling of systems represented by microscopic physics-based simulators, when coarse-grained evolution equations are not available in closed form.
C.William Gear   +19 more
core   +1 more source

Novel spectral kurtosis technology for adaptive vibration condition monitoring of multi-stage gearboxes [PDF]

open access: yes, 2016
In this paper, the novel wavelet spectral kurtosis (WSK) technique is applied for the early diagnosis of gear tooth faults. Two variants of the wavelet spectral kurtosis technique, called variable resolution WSK and constant resolution WSK, are ...
Barbieri, M.   +5 more
core   +1 more source

Influence of triangular rib on bending stress strength and tooth deflection for small size and high strength spiral bevel gear supported by ribs fabricated by five-axis controlled machining center

open access: yesNihon Kikai Gakkai ronbunshu, 2022
We have developed a small size and high strength spiral bevel gear fabricated by five-axis controlled machining center. In the present report, we propose a novel spiral bevel gear with the rib at the end of face width to reinforce the tooth bending ...
Masahiro SAITO   +3 more
doaj   +1 more source

Design of Geometrical Parameters and Kinematical Characteristics of a Non-circular Gear Transmission for Given Parameters

open access: yesApplied Sciences, 2021
In this paper, the authors present the design of a suitable gear transmission with the continuously changing gear ratio in the range from 0.5 through 1.0 to 2.0 and back during one revolution of intermeshing gears, according to demands specified for a ...
Silvia Maláková   +4 more
semanticscholar   +1 more source

Influence of additional surface finishing to the material properties and the flank load carrying capacity of case-hardened gears with grinding burn

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2017
The grinding of case-hardened gears after the heat treatment ensures a high quality regarding the gear geometry and tooth surface topography. If the limits of the gear material are exceeded during this process, the mechanical and thermal influence from ...
Johannes KOENIG   +3 more
doaj   +1 more source

On the Simulation of the Micro-Contact of Rough Surfaces Using the Example of Wet Friction Clutch Materials

open access: yesLubricants, 2019
Friction behavior in a sliding contact is strongly influenced by the surface topography of the bodies in contact. This also applies to friction clutches. Even small differences in surface topography may cause significant differences in friction behavior.
Katharina Voelkel   +5 more
doaj   +1 more source

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