This paper presents the investigation into tooth profile features, meshing characteristics and principle of forming circular arc race cylindrical gears (CATT gears).Based on theory curvilinear gear, surface equations line rack shave been established.The graphical analysis these shows performances.The results reveal that an ideal CATT gear can mesh with each other at a contact cutter machine by translational motion.A planetary train is proposed to be used as processing device.The device...

In this study on cylindrical gears with variable hyperbolic circular arc and tooth trace (VH-CATT), the surface equation of VH-CATT gear is obtained according to theory meshing differential geometry.The data points are using MATLAB.Then, based points, a model pair was built UG.Considering geometric features, contact form, relative velocity, entrainment load, etc., an isothermal elastohydrodynamic lubrication established.On basis existing (EHL) theory, EHL numerical solution by utilizing...

Fuel atomization plays a vital role in aeroengine precombustion. In this study, we propose optimization models to improve the performance of air-assisted swirl nozzles during startup phase under low pressure. We have investigated effect four crucial geometrical parameters: tilt angle cyclone slot, ratio chamber diameters, diffuser expansion semi-angle, and airway helix angle, on spray liquid film thickness at exit. selected 60 training samples 21 test by optimal Latin hypercube sampling for...

Given the absence of a theoretical formula to analyze influence parameters on contact stress cylindrical gear with arc tooth, an explicit mathematical model tooth between design and is established based Kriging surrogate model. The variation function are optimized by using whale optimization algorithm (WOA), accuracy in turn improved analyzed proposed was realized via programming platform MATLAB; simulation results indicate that precision evaluation indexes (the correlation coefficient (R2),...

Aiming at vehicles will produce shocks and vibrations for various reasons in the process of transportation handling, any shock vibration that exceeds regulations would cause damage to nuclear fuel being transported. In order monitor analyze data scientifically, a monitoring system based on MEMS acceleration sensor technology is developed measure vibrations. The measured result involves some noise caused by sensitivity electrical noise, digital filter mathematical modelling introduced reduce...

In order to study the influence of design parameters (pressure angle, tooth width, line radius, modulus, and moment) on contact stress variable hyperbolic circular arc gear (VHCAG) obtain best manufacturing parameters, The Kriging-Response Surface Model, a hybrid surrogate model with adaptive quantum particle swarm optimization (QPSO) algorithm was proposed establish expression prediction for relation between stress.An intelligent based weight natural selection is optimize Gaussian variation...

Perma-Zyme is an enzymatic stabilizer. To test the feasibility of adding to tabia used protect ancient earthen ruins, 28d unconfined compression strength, permeability and color-difference were tested determine difference between treated with Perma-Zyme. The experimental results show that strengths specimens are higher than those without Perma-Zyme, color-difference(DE * ) mixed Perma-zyme larger 3(suggested color tolerance Chinese standardized GB/T 15608-2006), coefficient smaller i.e., has...

Flow-induced localized corrosion is regarded as one of the main degradation mechanisms materials. As an initial step simulation a pipe, plate chosen to simplify problem. In this paper, finite element method used simulate process in by employing nonlinear geometry and physics equations material describe quasi-static process. An elastic modulus iterative procedure was performed obtain parameters consideration physical properties corrosion. The effect then considered introducing criterion...