Manual for Automatic Generation of Finite Element Models of Spiral Bevel Gears in Mesh PDF Download
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Author: Publisher: ISBN: Category : Languages : en Pages : 58
Book Description
The goal of this research is to develop computer programs that generate finite element models suitable for doing 3D contact analysis of faced milled spiral bevel gears in mesh. A pinion tooth and a gear tooth are created and put in mesh. There are two programs: Points.f and Pat.f to perform the analysis. Points.f is based on the equation of meshing for spiral bevel gears. It uses machine tool settings to solve for an N x M mesh of points on the four surfaces, pinion concave and convex, and gear concave and convex. Points.f creates the file POINTS. OUT, an ASCI file containing N x M points for each surface. (N is the number of node points along the length of the tooth, and M is nodes along the height.) Pat.f reads POINTS. OUT and creates the file ti out. Tl .out is a series of PATRAN input commands. In addition to the mesh density on the tooth face, additional user specified variables are the number of finite elements through the thickness, and the number of finite elements along the tooth full fillet. A full fillet is assumed to exist for both the pinion and gear. (AN).
Author: Publisher: ISBN: Category : Languages : en Pages : 58
Book Description
The goal of this research is to develop computer programs that generate finite element models suitable for doing 3D contact analysis of faced milled spiral bevel gears in mesh. A pinion tooth and a gear tooth are created and put in mesh. There are two programs: Points.f and Pat.f to perform the analysis. Points.f is based on the equation of meshing for spiral bevel gears. It uses machine tool settings to solve for an N x M mesh of points on the four surfaces, pinion concave and convex, and gear concave and convex. Points.f creates the file POINTS. OUT, an ASCI file containing N x M points for each surface. (N is the number of node points along the length of the tooth, and M is nodes along the height.) Pat.f reads POINTS. OUT and creates the file ti out. Tl .out is a series of PATRAN input commands. In addition to the mesh density on the tooth face, additional user specified variables are the number of finite elements through the thickness, and the number of finite elements along the tooth full fillet. A full fillet is assumed to exist for both the pinion and gear. (AN).
Author: National Aeronautics and Space Administration (NASA) Publisher: Createspace Independent Publishing Platform ISBN: 9781722627560 Category : Languages : en Pages : 58
Book Description
The goal of this research is to develop computer programs that generate finite element models suitable for doing 3D contact analysis of faced milled spiral bevel gears in mesh. A pinion tooth and a gear tooth are created and put in mesh. There are two programs: Points.f and Pat.f to perform the analysis. Points.f is based on the equation of meshing for spiral bevel gears. It uses machine tool settings to solve for an N x M mesh of points on the four surfaces, pinion concave and convex, and gear concave and convex. Points.f creates the file POINTS.OUT, an ASCI file containing N x M points for each surface. (N is the number of node points along the length of the tooth, and M is nodes along the height.) Pat.f reads POINTS.OUT and creates the file tl.out. Tl.out is a series of PATRAN input commands. In addition to the mesh density on the tooth face, additional user specified variables are the number of finite elements through the thickness, and the number of finite elements along the tooth full fillet. A full fillet is assumed to exist for both the pinion and gear. Bibel, G. D. and Reddy, S. and Kumar, A. Unspecified Center...
Author: Publisher: ISBN: Category : Languages : en Pages : 20
Book Description
An experimental study to investigate the bending stress in aerospace-quality spiral bevel gears was performed. Tests were conducted in the NASA Lewis Spiral Bevel Gear Test Facility. Multiple teeth on the spiral bevel pinion were instrumented with strain gages and tests were conducted from static (slow roll) to 14400 RPM at power levels to 540kW (720 hp). Effects of changing speed and load on the bending stress were measured. Experimental results are compared to those found by three-dimensional finite element analysis.
Author: Robert F. Handschuh Publisher: ISBN: Category : Languages : en Pages : 12
Book Description
A review of recent progress for the analysis of spiral bevel gears will be described. The foundation of this work relies on the description of the gear geometry of face milled spiral bevel gears via the approach developed by Litvin. This methodology was extended by combining the basic gear design data with the manufactured surfaces using a differential geometry approach, and provides the data necessary for assembling three dimensional finite element models. The finite element models have been utilized to conduct thermal and structural analysis of the gear system. Examples of the methods developed for thermal and structural/contact analysis are presented.
Author: Publisher: ISBN: Category : Languages : en Pages : 60
Book Description
A new approach for design, generation, computerized simulation of meshing and contact, and stress analysis of formate cut spiral bevel gear drives is reported. The approach proposed is based on application of four procedures that permit in sequence to provide a longitudinally directed bearing contact, a predesigned parabolic function of transmission errors, a limit to the shift of bearing contact caused by errors of alignment, and to automatically generate the finite element models for application of a general purpose finite element analysis computer program. A new computer program has been developed that provides optimized machine-tool settings for finishing of spiral bevel gears utilizing the "Formate" grinding process with minimized transmission errors. The new computer program is based on the four procedures mentioned above. The developed theory is illustrated with several examples of design and computations.
Author: National Aeronautics and Space Administration (NASA) Publisher: Createspace Independent Publishing Platform ISBN: 9781725000865 Category : Languages : en Pages : 32
Book Description
An analytical method was developed to determine gear tooth surface coordinates of face-milled spiral bevel gears. The method uses the basic gear design parameters in conjunction with the kinematical aspects of spiral bevel gear manufacturing machinery. A computer program, SURFACE, was developed. The computer program calculates the surface coordinates and outputs 3-D model data that can be used for finite element analysis. Development of the modeling method and an example case are presented. This analysis method could also find application for gear inspection and near-net-shape gear forging die design. Handschuh, Robert F. and Litvin, Faydor L. Glenn Research Center NASA-TP-3096, E-5837, NAS 1.60:3096, AVSCOM-TR-91-C-020, AD-A242332 DA PROJ. 1L1-62211-A-47-A; RTOP 505-63-51...
Author: 
Author: 
Author: National Aeronautics and Space Administration (NASA)
Author: George D. Bibel
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Author: Robert F. Handschuh
Author: Robert F. Handschuh
Author: Robert F. Handschuh
Author: 
Author: Robert F. Handschuh
Author: National Aeronautics and Space Administration (NASA)