Mechanical Systems Technology Branch research summary, 1985 - 1992

Abstract : This publication contains a collection of significant accomplishments from the research of the Mechanical Systems Technology Branch at the NASA Lewis Research Center completed during the years 1985-1992. The publication highlights and accomplishments made in bearing and gearing technology through in-house research, university grants, and industry contracted projects. The publication also includes a complete listing of branch publications for these years. Transmissions, Gears, Bearings, Helicopters.

[1]  George D. Mitchell.  Manufacturing techniques - Split torque path helicopter transmission , 1991 .

[2]  Harold Frint.  Automated inspection and precision grinding of spiral bevel gears , 1987 .

[3]  Dennis P. Townsend,et al.  Effect of five lubricants on life of AISI 9310 spur gears , 1985 .

[4]  E. V. Zaretsky,et al.  Effect of speed and press fit on fatigue life of roller-bearing inner-race contact , 1985 .

[5]  Gregory F. Heath,et al.  Advanced Rotorcraft Transmission program summary , 1992 .

[6]  Donald R. Houser,et al.  Transmission error and load distribution analysis of spur and double helical gear pairs used in a split path helicopter transmission design , 1991 .

[7]  Harold H. Coe.  Spur-gear optimization using SPUROPT computer program , 1991 .

[8]  Hsiang Hsi Lin,et al.  Effect of contact ratio on spur gear dynamic load , 1996 .

[9]  Donald R. Houser,et al.  Non-linear dynamic analysis of geared systems , 1990 .

[10]  W. J. Atherton,et al.  Investigation on experimental techniques to detect, locate and quantify gear noise in helicopter transmissions , 1985 .

[11]  Xiaoling Wu.  The distribution of oil film thickness along the contact line of gears , 1989 .

[12]  John J. Coy,et al.  Summary of drive-train component technology in helicopters , 1984 .

[13]  Dennis P. Townsend.  Surface fatigue and failure characteristics of hot forged powder metal AISI 4620, AISI 4640, and machined AISI 4340 steel spur gears , 1987 .

[14]  R. L. Huston,et al.  Dynamic loading on parallel shaft gears , 1986 .

[15]  John J. Coy,et al.  Computerized life and reliability modelling for turboprop transmissions , 1989 .

[16]  John J. Coy,et al.  Vibration characteristics of OH-58A helicopter main rotor transmission , 1987 .

[17]  Dennis P. Townsend.  Surface Pitting Fatigue Life of Noninvolute, Low-Contact-Ratio Gears , 1990 .

[18]  R. F. Handschuh,et al.  Generation of a crowned pinion tooth surface by a surface of revolution , 1988 .

[19]  D. G. Lewicki,et al.  Transmission overhaul estimates for partial and full replacement at repair , 1991 .

[20]  James Pike,et al.  Expansion of epicyclic gear dynamic analysis program , 1987 .

[21]  T. L. Krantz,et al.  Advanced Rotorcraft Transmission (ART) Program summary , 1992 .

[22]  Ronald L. Huston,et al.  Contact stresses in gear teeth - A new method of analysis , 1991 .

[23]  Ronald L. Huston,et al.  Contact stresses in meshing spur gear teeth: Use of an incremental finite element procedure , 1992 .

[24]  Gregory F. Heath,et al.  Advanced Rotorcraft Transmission (ART) program status , 1991 .

[25]  B. J. Hamrock,et al.  Transmission Efficiency Measurements and Correlations with Physical Characteristics of the Lubricant , 1984 .

[26]  J. W. Rosenlieb.  Planetary-gear-support bearing test rig design , 1985 .

[27]  Fred B. Oswald,et al.  Validation of finite element and boundary element methods for predicting structural vibration and radiated noise , 1992 .

[28]  Teik C. Lim,et al.  Modal analysis of gear housing and mounts , 1989 .

[29]  Hsiang Hsi Lin,et al.  Computer-Aided Design of High-Contact-Ratio Gears for Minimum Dynamic Load and Stress , 1993 .

[30]  D. P. Townsend,et al.  Effect of lubricant extreme-pressure additives on surface fatigue life of AISI 9310 spur gears , 1984 .

[31]  R. Handschuh.  High-temperature erosion of plasma-sprayed, yttria-stabilized zirconia in a simulated turbine environment , 1985 .

[32]  Faydor L. Litvin,et al.  Application of Face-Gear Drives in Helicopter Transmissions , 1994 .

[33]  M. Savage,et al.  Optimal Design of Compact Spur Gear Reductions , 1992 .

[34]  D. Townsend.  Improvement in surface fatigue life of hardened gears by high-intensity shot peening , 1992 .

[35]  Hsiang Hsi Lin,et al.  Influence of Linear Profile Modification and Loading Conditions on The Dynamic Tooth Load and Stress of High-Contact-Ratio Spur Gears , 1991 .

[36]  Dezi Folenta,et al.  Design, Manufacture, and Spin Test of High Contact Ratio Helicopter Transmission Utilizing Self-Aligning Bearingless Planetary (SABP) , 1988 .

[37]  Faydor L. Litvin,et al.  Method for Generation of Spiral Bevel Gears With Conjugate Gear Tooth Surfaces , 1987 .

[38]  F. B. Oswald,et al.  Improvement in Finite Element Meshes: Heat Transfer in an Infinite Cylinder , 1989 .

[39]  Dennis P. Townsend,et al.  Effects of gear box vibration and mass imbalance on the dynamics of multistage gear transmission , 1991 .

[40]  Ronald L. Huston,et al.  Computer simulation of gear tooth manufacturing processes , 1990 .

[41]  Faydor L. Litvin,et al.  Spiral bevel and circular arc helical gears: Tooth contact analysis and the effect of misalignment on circular arc helical gears , 1985 .

[42]  Faydor L. Litvin,et al.  Generated Spiral Bevel Gears: Optimal Machine-Tool Settings and Tooth Contact Analysis , 1985 .

[43]  Faydor L. Litvin,et al.  Determination of real machine-tool settings and minimization of real surface deviation by computerized inspection , 1991 .

[44]  D. Townsend,et al.  Effect of shot peening on surface fatigue life of carburized and hardened AISI 9310 spur gears , 1988 .

[45]  R. L. Huston,et al.  Dynamic analysis of straight and involute tooth forms , 1984 .

[46]  John J. Coy,et al.  Identification and proposed control of helicopter transmission noise at the source , 1987 .

[47]  David G. Lewicki,et al.  Full-scale transmission testing to evaluate advanced lubricants , 1992 .

[48]  Faydor L. Litvin,et al.  Generation and tooth contact analysis of spiral bevel gears with predesigned parabolic functions of transmission errors. , 1989 .

[49]  Dennis P. Townsend,et al.  Evaluation of advanced lubricants for aircraft applications using gear surface fatigue tests , 1991 .

[50]  R. L. Huston,et al.  Computer aided design and analysis of gear tooth geometry , 1987 .

[51]  Harold K. Frint,et al.  Enhanced automated spiral bevel gear inspection , 1992 .

[52]  D. Townsend,et al.  Lubricant and Additive Effects on Spur Gear Fatigue Life , 1986 .

[53]  Faydor L. Litvin,et al.  Helical Gears With Circular Arc Teeth: Simulation of Conditions of Meshing and Bearing Contact , 1985 .

[54]  D. Townsend,et al.  Surface Fatigue Life of CBN and Vitreous Ground Carburized and Hardened AISI 9310 Spur Gears , 1988 .

[55]  Harold K. Frint.  Design and evaluation of high contact ratio gearing , 1986 .

[56]  Faydor L. Litvin,et al.  Spur Gears: Optimal Geometry, Methods for Generation and Tooth Contact Analysis (TCA) Program , 1988 .