Interactions between nonlinear spur gear dynamics and surface wear

2007 ◽  
Vol 307 (3-5) ◽  
pp. 662-679 ◽  
Author(s):  
Huali Ding ◽  
Ahmet Kahraman
Keyword(s):  
Spur Gear ◽  
Surface Wear ◽  
Gear Dynamics

Effect of Contact Ratio on Spur Gear Dynamic Load With No Tooth Profile Modifications

1996 ◽  
Vol 118 (3) ◽  
pp. 439-443 ◽  
Author(s):  
Chuen-Huei Liou ◽  
Hsiang Hsi Lin ◽  
F. B. Oswald ◽  
D. P. Townsend
Keyword(s):  
Dynamic Load ◽  
Spur Gear ◽  
Tooth Size ◽  
Contact Ratio ◽  
Gear Dynamics ◽  
Wide Range ◽  
Gear Contact ◽  
Center Distance ◽  
Selection Of ◽  
Better Than

This paper presents a computer simulation showing how the gear contact ratio affects the dynamic load on a spur gear transmission. The contact ratio can be affected by the tooth addendum, the pressure angle, the tooth size (diametral pitch), and the center distance. The analysis presented in this paper was performed by using the NASA gear dynamics code DANST. In the analysis, the contact ratio was varied over the range 1.20 to 2.40 by changing the length of the tooth addendum. In order to simplify the analysis, other parameters related to contact ratio were held constant. The contact ratio was found to have a significant influence on gear dynamics. Over a wide range of operating speeds, a contact ratio close to 2.0 minimized dynamic load. For low-contact-ratio gears (contact ratio less than two), increasing the contact ratio reduced gear dynamic load. For high-contact-ratio gears (contact ratio equal to or greater than 2.0), the selection of contact ratio should take into consideration the intended operating speeds. In general, high-contact-ratio gears minimized dynamic load better than low-contact-ratio gears.

Investigation on coupling effects between surface wear and dynamics in a spur gear system

2016 ◽  
Vol 101 ◽  
pp. 383-394 ◽  
Author(s):  
Xianzeng Liu ◽  
Yuhu Yang ◽  
Jun Zhang
Keyword(s):  
Spur Gear ◽  
Gear System ◽  
Surface Wear ◽  
Coupling Effects

Stochastic spur gear dynamics by numerical path integration

2007 ◽  
Vol 302 (4-5) ◽  
pp. 936-950 ◽  
Author(s):  
A. Naess ◽  
F.E. Kolnes ◽  
E. Mo
Keyword(s):  
Path Integration ◽  
Spur Gear ◽  
Gear Dynamics

VEHICLE GEARBOX DYNAMICS: CENTRE DISTANCE INFLUENCE ON MESH STIFFNESS AND SPUR GEAR DYNAMICS

Transport ◽  
2010 ◽  
Vol 25 (3) ◽  
pp. 278-286 ◽  
Author(s):  
Viktor Skrickij ◽  
Marijonas Bogdevičius
Keyword(s):  
Spur Gear ◽  
Transmission Model ◽  
Time Varying ◽  
Mesh Stiffness ◽  
Gear Dynamics ◽  
Distance Error ◽  
Gear Box

Vehicle gearbox dynamics is characterized by time varying mesh stiffness. The paper presents a survey of methods used for determining mesh stiffness and the analysis of the centre distance influence on it. The refined mathematical transmission model presenting the centre distance as a variable is presented. The centre distance error as well as backlash and bearing flexibility is defined and the influence of these factors on mesh stiffness and spur gear dynamics is investigated. The results obtained from this paper may be used in gear‐box diagnostics.

Optimization of Tooth Bending Fatigue Characteristics of Spur Gear Pairs Using a Gear Dynamics-Based Approach

2015 ◽  
Author(s):  
Yalın Öztürk ◽  
Ender Ciğeroğlu ◽  
H. Nevzat Özgüven
Keyword(s):  
Fatigue Life ◽  
Gear Tooth ◽  
Spur Gear ◽  
Bending Fatigue ◽  
Gear Dynamics ◽  
Optimization Study ◽  
Fatigue Life Estimation ◽  
Fatigue Characteristics ◽  
Profile Optimization ◽  
Operational Range

A gear tooth profile optimization study is performed with the target being defined as the maximization of tooth bending fatigue life for a selected operational range, where the operating torque and speed ranges are defined along with their corresponding durations. For this purpose, a nonlinear lumped gear dynamics model is combined with the S/N curve of the gear material in order to estimate tooth bending fatigue life of the spur gear pair. The differences between the predicted lives of the optimally modified and non-modified gear pairs are presented based on example spur gear pairs. The proposed tooth bending fatigue life estimation is compared with the standard AGMA procedure.

A Rotary Model for Spur Gear Dynamics

1985 ◽  
Vol 107 (4) ◽  
pp. 529-535 ◽  
Author(s):  
D. C. H. Yang ◽  
Z. S. Sun
Keyword(s):  
Energy Dissipation ◽  
Dynamic Model ◽  
High Speed ◽  
Spur Gear ◽  
Tooth Profile ◽  
Gear System ◽  
Gear Dynamics

We develop a dynamic model for a spur gear system with backlash. This model is circular and is geometrically different from the rectilinear gear model of Azar and Crossley. By taking advantage of involute tooth profile, we are able to take material compliance and energy dissipation into account. Furthermore, the complicated phenomenon of contact tooth pairs alternation between one and two during meshing is also included in the model. This model is believed to be closer to reality than the existing model and hopefully is useful in studying gears in high-speed and intermittent motions.

An Analytical Model for Spur Gear Dynamics

1997 ◽  
Author(s):  
Jao-Hwa Kuang ◽  
Ah-Der Lin
Keyword(s):  
Mathematical Model ◽  
Analytical Model ◽  
Analytical Solutions ◽  
Dynamic Contact ◽  
Spur Gear ◽  
Dynamic Loads ◽  
Gear Pair ◽  
Mesh Stiffness ◽  
Detailed Model ◽  
Gear Dynamics

Abstract A mathematical model for a spur gear pair with two-step mesh stiffness is proposed. Two constant values of mesh stiffness are used to approximate the complicated compliance alternation of contact tooth pairs between one and two during meshing. Analytical solutions of the dynamic loads are derived. The method has been employed to calculate the dynamic contact load, transmitted torque and the bearing forces. The results compared favorably with a more detailed model found in the literature.

scholarly journals Effect of Contact Ratio on Spur Gear Dynamic Load

1992 ◽  
Author(s):  
Chuen-Huei Liou ◽  
Hsiang Hsi Lin ◽  
Fred B. Oswald ◽  
Dennis P. Townsend
Keyword(s):  
Dynamic Load ◽  
Spur Gear ◽  
Tooth Size ◽  
Contact Ratio ◽  
Gear Dynamics ◽  
Wide Range ◽  
Gear Contact ◽  
Center Distance ◽  
Selection Of ◽  
Better Than

Abstract This paper presents a computer simulation showing how the gear contact ratio affects the dynamic load on a spur gear transmission. The contact ratio can be affected by the tooth addendum, the pressure angle, the tooth size (diametral pitch), and the center distance. The analysis presented in this paper was performed by using the NASA gear dynamics code DANST. In the analysis the contact ratio was varied over the range 1.20 to 2.40 by changing the length of the tooth addendum. In order to simplify the analysis, other parameters related to contact ratio were held constant. The contact ratio was found to have a significant influence on gear dynamics. Over a wide range of operating speeds a contact ratio close to 2.0 minimized dynamic load. For low-contact-ratio gears (contact ratio less than 2.0), increasing the contact ratio reduced the gear dynamic load. For high-contact-ratio gears (contact ratio equal to or greater than 2.0), the selection of contact ratio should take into consideration the intended operating speeds. In general, high-contact-ratio gears minimized dynamic load better than low-contact-ratio gears.

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