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Wednesday, August 12, 2020 | History

3 edition of Dynamic loading of spur gears with linear or parabolic tooth profile modifications found in the catalog.

Dynamic loading of spur gears with linear or parabolic tooth profile modifications

Dynamic loading of spur gears with linear or parabolic tooth profile modifications

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Published by National Aeronautics and Space Administration, For sale by the National Technical Information Service in [Washington, DC], [Springfield, Va .
Written in English

    Subjects:
  • Gearing, Spur.,
  • Mechanical engineering -- United States.

  • Edition Notes

    StatementHsiang Hsi Lin and Fred B. Oswald and Dennis P. Townsend.
    SeriesNASA technical memorandum -- 101444., AVSCOM technical report -- 88-C-003., AVSCOM technical report -- 88-C-3.
    ContributionsOswald, Fred B., Townsend, Dennis P., United States. National Aeronautics and Space Administration.
    The Physical Object
    FormatMicroform
    Pagination1 v.
    ID Numbers
    Open LibraryOL17658841M

      Tip and/or root modifications are well-known solutions that improve dynamic performance of gears. The present work investigates the complex, nonlinear dynamic behavior of three bevel gear models: (1) model with pure involute profile, (2) model with statically optimized tooth profile, and (3) model with dynamically optimized tooth by: values. MATLAB code also gives the tooth profile of involute gear with correct dimensions. Keywords: Spur gear design, Bending and Compressive stress, Tooth profile, MATLAB Introduction Gears are one of the oldest of humankind's creations. About all the devices we consider as a machines use gear File Size: KB.

    This new edition provides extensive information to designers on various aspects of gears and gearing systems. Very comprehensive in its coverage, the handbook contains enough tables, illustrative examples and diagrams to enable designers arrive at quick solutions for their problems. The handbook is based on ISO specifications and is a unique blend of practical as well as the theoretical /5(7). This paper presents a systematic methodology focused on herringbone gear microgeometry modifications toward vibration reduction. The dynamic model considering the unique characteristics of aviation herringbone gear is developed to study the vibration behavior. The optimal ease-off shape can be defined as the outcome of a multi-objective optimization process, the objective functions are loaded Cited by: 5.

    The tooth profile modification can generally choose straight line modification, parabolic modification and arc modification. In order to accurately determine the tooth profile modification curves, basing on analysis of the vibration that effected by transmission error, a pair of gears meshing process is simulated with FEM approach. Aiming at reducing the fluctuation of transmission error, the Author: Zhe Yuan, Yu Guo. On the Modelling of Spur and Helical Gear Dynamic Behaviour Philippe Velex University of Lyon, INSA Lyon, LaMCoS UMR CNRS, France 1. Introduction This chapter is aimed at introducing the fundamentals of spur and helical gear dynamics. Using three-dimensional lumped models and a thin-slice approach for mesh elasticity, the.


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Dynamic loading of spur gears with linear or parabolic tooth profile modifications Download PDF EPUB FB2

The following conclusions were obtained: I. The amount and type of tooth profile modifications have a significant effect on the dynamic performance of spur gear systems.

Parabolic tooth profile modification is generally preferred for low dynamic response in gears which operate over a range of loading by: A computer simulation was conducted to investigate the effects of both linear and parabolic tooth profile modification on the dynamic response of low-contact-ratio spur gears.

The effect of the total amount of modification and the length of the modification zone were studied at various loads and speeds to find the optimal profile modification for minimal dynamic by: the normalized maximum dynamic load of spur gears with either linear or parabolic tooth profile modifications were further investigated.

The noramlized maximum dynamic load is defined as the product of the maximum dynamic load factor (MDLF) and the normalized total transmitted load File Size: KB. This means gears To understand the detailed effect of tooth pro- with parabolic tooth profile modifications require a file modification on the dynamic behaviour of a spur greater amount of modification than gears with linear gear transmission, the amount (a) and length (Ln) were profile Size: KB.

Dynamic loading of spur gears with linear or parabolic tooth profile modifications. By D. Townsend, H. Lin and F. Oswald. Abstract. A computer simulation was conducted to investigate the effects of both linear and parabolic tooth profile modification on the dynamic response of low-contact-ratio spur gears.

The effect of the total Author: D. Townsend, H. Lin and F. Oswald. Dynamic loading of spur gears with linear or parabolic tooth profile modifications. Hsiang Hsi Lin, Fred B. Oswald, Dennis P. Townsend; Mathematics; ; VIEW 1 EXCERPT. Handbook of Gear Design. Gitin M. Maitra; Engineering. Dynamic loading of spur gears with linear or parabolic tooth profile modifications.

Mechanism and Machine Theory, 29 (8): DOI: /x(94)Author: Rong Hao Li, Jue Yang. In this paper, the effects of tooth profile modification on the load response of spur gears with involute external teeth were studied, for contact ratio below 2. Such gears suffer from abrupt changes of the transmitted load due to the successive engagement and disengagement of gear teeth and because teeth are compliant.

Dynamic Analysis of Spur Gear Pairs: Steady-State Response and Stability of the SDOF Model With Time-varying Mesh Damping Mech. Syst. Signal Process.

,Cited by: STATIC AND DYNAMIC ANALYSIS OF SPUR GEAR Shubham A. Badkas and Nimish Ajmera Lewis has assumed parabola in the gear tooth. So we directly find the deflection of the This is the expression for the maximum deflection of spur gear teeth tip when tangential load is applied at the teeth.

change of the true involute profile of the gear tooth [2]. Different shapes of tooth profile modification are proposed by various researchers, such as linear, parabolic, circular, straight, quadratic and rotated form profile modifications.

Since modifying the root of one member has the same effectFile Size: KB. of speed (a "speed sweepll) for unmodified gears (fig. 5) and gears modified with A linear tip relief along a modification length of Ln (fig.

The dynamic factor is defined as the ratio of the maximum dynamic tooth load to the static tooth by: For this, first the tooth deformation is found and then the tooth dynamic load is determined for all reasonable speeds.

A parametric study is conducted to establish the superiority of the C.S. based gear profile over the involute profile as well as the other profiles based on the use of linear and parabolic tip by:   The effects of the shape of tooth profile modifications on the transmission error, bending, and contact stress of spur gears Y A Tesfahunegn, F Rosa, and C Gorla Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science Cited by: shows the parameters defining tooth profile modifications.

Figure4. Representation of profile modification parameters The type of the modifications can be linear or parabolic with respect to the roll angle. Since parabolic modifications give worst results in optimization therefore linear modifications are considered [14].

Corner contact File Size: KB. From Figure 15(a), it can be observed that both linear and parabolic modification can improve the dynamic tooth loads for external meshes over the entire sun-gear speed range. The dynamic tooth load for parabolic modification appears to be better than linear modification for external : Jiaming Zhou, Fengyan Yi, Xiangyang Xu, Xiangyang Xu, Junbin Lai, Junbin Lai, Yanfang Liu, Yanfang L.

The following spur gear pair will be considered: number of teeth on pinion and wheel 39 module 5 mm, pressure angle 14º, rack shift coefficient on both gears 0, tooth addendum 5 mm, tooth dedendum mm, tool tip radius mm, operating center distance by: 1.

A sixteen-degree-of-freedom (DOF) lumped parameter dynamic model taking into account the gravity, eccentricity, bearing clearance, transmission error, and coupled lateral-torsional vibration is established. Based on the dynamical equation, the dynamic behaviors of the spur gear rotor bearing system are investigated by using Runge-Kutta method.

The research focuses on the effect of Cited by: 5. Get this from a library. Dynamic loading of spur gears with linear or parabolic tooth profile modifications. [Hsiang Hsi Lin; Fred B Oswald; Dennis P Townsend; United States.

National Aeronautics and Space Administration.]. Mesh stiffness calculation of helical gears with profile.

‘ Dynamic simulation of spur gear. The calculation includes the tooth profile modifications and crownings, manufacturing and Author: Yimin Shao. In this article, a new tip relief profile modification for spur gears is presented. The topography proposed here is a classical linear profile modification with a parabolic fillet (linear-parabolic modification).

The parabolic fillet extension is treated as a parameter and its effect investigated.PDF | This paper aims at investigating the effects of tooth profile modification (TPM) on the dynamic response of planetary gear train (PGT).

A | Find, read and cite all the research you need.~ II ~ ACKNOWLEDGEMENTS “Success is sweet: the sweeter if long delayed and attained through manifold struggles and defeats.” I would like to take this opportunity to File Size: 5MB.