Low-speed and heavy-load gears generate a lot of heat during meshing transmission, which leads to thermal deformation the affects transmission performance gear system. It is great significance explore influence law temperature effects on nonlinear dynamics Based principle deformation, taking into account effect parameters, including time-varying stiffness, tooth side clearance as well comprehen...

some numerical and experimental investigations are made on the performance of five different hyperelastic constitutive models (second order polynomial, yeoh, arruda-boyce, ogden and marlow) in tension and compressionmodes. first, the results of the tensile and compression tests on a rubber sample were used to determine the parameters of the models by curve fitting methods. next, by using an alg...

A unified topological layer for mesh generation has been created to benefit from current development, to reuse existing, well tested and reliable methods, such as the Delaunay or the Advancing Front mesh generation approach, and to combine them to be able to interchange these methods, without taking a detour using file formats. In addition, by modularizing existing meshing kernels, this approac...

A sweep process of a wing is very useful technique to enhance an aircraft performance especially the which fly in sonic and supersonic areas. In this research, influence swept on aerodynamic characteristics generation at speeds has been studied analyzed using CFD technique. The 3D model presented paper NACA 2412 profile. governing equations such as continuity, Energy Equation, Reynolds Averagin...

In an effort to improve the robustness and efficiency of mesh adaptation, this work proposes an adaptive re-meshing method that can be used for variety of problems in CFD. It should be noted that this method is feature driven adaptivity and that it does not use strategies such as edge split, edge collapse, edge swap, etc as were employed in mesh modifications [2]. Instead, it defines the ”holes...

This paper proposes a practical, topologically robust and ranging error resistive shape modeling procedure that approximates a real 3D object with the matrix-formatted organized meshing for the 3D shape processing. A geometric model with desired meshing, not limited to triangular one, but also quadrilateral, hexagonal or n-gonal mesh, is directly reconstructed based on a solid modeling approach...

As a kind of tiny gear based on space curve meshing theory, the line is very suitable for miniaturized machines due to its compact size and low weight. However, usually suffers from serious vibration problems since teeth are designed as twisted three-dimensional cantilevers provide conjugated curves. A dynamic model pair established in this paper using numerical manifold method (NMM) alleviate ...

Planetary gears are widely used in mechanical transmission systems, but the vibration and noise affect their reliability life. In this paper, torsional dynamic model of an encased differential planetary gear with coaxial contrarotating outputs considering time-varying meshing stiffness, damping, phase difference all pairs is established. By solving equations derived system, three types natural ...

Power reflux hydraulic transmission system (PRHTS), which is a recently introduced continuously variable system, enables the improvement of fuel economy construction vehicles. For investigating nonlinear dynamic characteristics PRHTS, its model established by merging models planetary gear train and torque converter. A dynamical reveals parameters mesh damping, time-varying stiffness, error. The...