Results 11 to 20 of about 28,679 (285)
Jixie chuandong, 2021 Meshing stiffness calculation of fatigue pitting helical gear is an important basis of gear failure dynamics analysis. The finite element models of normal gears and fatigue pitting gears are established by using the finite element method to calculate the
Jinkai Li +4 more
doaj
Pitting damage levels estimation for planetary gear sets based on model simulation and grey relational analysis [PDF]
, 2011 The planetary gearbox is a critical mechanism in helicopter transmission systems. Tooth failures in planetary gear sets will cause great risk to helicopter operations.
Cheng, Zhe +3 more
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A Lightweight Model for Gear Mesh Dynamics Incorporating Variable Mesh Stiffness [PDF]
MATEC Web of Conferences, 2015 Variable stiffness of the gear tooth mesh for a pair of spur gears is computed using an accurate lightweight mathematical formulation. This is used to simulate gear dynamic behavior. Gear eigenfrequencies are calculated for the SDOF system and correlated with gear physical properties and the effect of stiffness variation during a mesh cycle is studied.
openaire +2 more sources
On the Influence of Force Distribution and Boundary Condition on Helical Gear Stiffness [PDF]
, 2015 The gear stiffness has a direct influence on the dynamic response of transmission systems that include a gear box, the stiffness also controls the load distribution among the teeth in mesh. The stiffness of a gear tooth varies non-linearly as the contact
Pedersen, Niels Leergaard
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Vaginal degeneration following implantation of synthetic mesh with increased stiffness [PDF]
BJOG: An International Journal of Obstetrics & Gynaecology, 2012 ObjectiveTo compare the impact of the prototype prolapse mesh Gynemesh PS with that of two new‐generation lower stiffness meshes, UltraPro and SmartMesh, on vaginal morphology and structural composition.DesignA mechanistic study employing a nonhuman primate model.SettingMagee‐Womens Research Institute at the University of Pittsburgh.PopulationParous ...
R, Liang +7 more
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Thermal performance enhancement of a heat exchanger using metal chain as a novel turbulator [PDF]
, 2021 Enhancing heat transfer in a heat exchanger system is critical to many industrial applications. There are many problems that require in-depth studies to find solutions.
Ghitheeth, Ali Hussein
core
Meshing Stiffness Calculation of Spur Bevel Gears Considering the Tooth Pair Coupling
Jixie chuandong, 2023 In order to solve the problem of calculation efficiency and accuracy of time-varying meshing stiffness of spur bevel gears, a slice calculation method of meshing stiffness of spur bevel gears considering the coupling effect of tooth pairs is proposed ...
Li Feifei, Dong Huimin, Zhang Chu
doaj
Forced vibrations of gearboxes with time dependent meshing stiffnesses [PDF]
PAMM, 2003 AbstractThe contribution presents the efficient method of the mathematical modelling of gearboxes with time dependent meshing stiffnesses. A gearbox is considered including a housing and an interior rotating shaft system with gears. Further the paper deals with an analysis of vibrations excited by the important sources of the internal excitation in ...
Hajžman, M., Zeman, V., Byrtus, M.
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Jixie chuandong, 2021 Gear is widely applied in mechanical transmission systems. Gear meshing stiffness is a time varying parameter because of the periodical changing of the numbers of teeth involved in meshing process，the meshing vibration is generated during gear meshing ...
Maohui Wang +4 more
doaj
Advanced Engineering Materials, EarlyView.Laser surface texturing significantly improves the corrosion resistance and mechanical strength of 3D‐printed iron polylactic acid (Ir‐PLA) for marine applications. Optimal laser parameters reduce corrosion by 80% and enhance tensile strength by 25% and ductility by 15%.
Mohammad Rezayat +6 more
wiley +1 more source