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A sph-based analysis method for dynamic meshing and transmission process of rack and pinion

A rack and pinion, process analysis technology, applied in the field of computational mechanics

Active Publication Date: 2020-12-11
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Smoothed Particle Hydrodynamics (SPH) is a pure Lagrangian gridless computing method gradually developed in recent years, mainly used in astrophysics, explosion mechanics, fluid mechanics and solid mechanics, etc. However, it is still in its infancy in the field of complex dynamic contact mechanical systems such as rack and pinion

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  • A sph-based analysis method for dynamic meshing and transmission process of rack and pinion
  • A sph-based analysis method for dynamic meshing and transmission process of rack and pinion
  • A sph-based analysis method for dynamic meshing and transmission process of rack and pinion

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Embodiment 1

[0117] Taking a rack and pinion transmission as an example, the numerical simulation method of the present invention is used for simulation. The gear modulus is 4mm, the pressure angle is 20°, and the tooth width is 20mm. It is assembled according to the standard center distance. The speed of the gear is 15rad / s. It is ductile cast iron with an elastic modulus of 173Gpa, a Poisson's ratio of 0.3 and a density of 7800kg / m 3 . The specific implementation process is as follows:

[0118] (1) Discretize the research area into a finite number of particles. In order to save calculation time, the structure of the rack and pinion is simplified to a certain extent. There are 395 gear particles, 658 rack particles, and 322 virtual particles on the solid wall boundary. The initial distance between particles is 0.001m. And the elastic modulus, Poisson's ratio, density and other physical parameters are assigned to the particles respectively.

[0119] (2) Set the time step to , a total...

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Abstract

The invention provides a method for analyzing the dynamic meshing and transmission process of a rack and pinion based on SPH. The method adopts a pure Lagrangian mesh-free method-Smoothed Particle Hydrodynamics (SPH), which discretizes models such as gears and racks into finite particles, and can analyze high-speed dynamics between models such as gears and racks. , Mechanics and motion behavior of the whole process of dynamic meshing and transmission. This method can avoid the mesh distortion in the face of large deformation in the traditional mesh method, and provides a new analysis method for high-speed complex meshing mechanical systems such as gears, racks, and bearings.

Description

technical field [0001] The invention relates to the field of computational mechanics, in particular to an SPH-based analysis method for the dynamic meshing and transmission process of a rack and pinion. Background technique [0002] When the traditional analytical method is used to study the dynamics of rack and pinion transmission, it is difficult to correctly reflect the real-time dynamic mechanical behavior due to a large number of simplifications. However, the mesh-based numerical methods developed in recent years (such as finite element method, finite difference method, etc.) can numerically simulate the transfer process, but when faced with large deformation and crack propagation, it is easy to produce mesh distortion and cause damage. Cause calculation error or even calculation suspension, thus limiting its application. Therefore, constructing a new numerical method for the dynamic meshing and transmission of racks and pinions can provide a scientific basis for the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/17G06F30/25G06F30/28G06F111/10G06F113/08G06F119/14
CPCG06F30/17G06F30/25G06F30/28G06F2111/10G06F2113/08G06F2119/14
Inventor 唐宇峰
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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