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Users' Manual for Asymmetric Wheel/Rail Contact Characterization Program.

PB279707

Publication Date	1977
Personal Author	Heller, R.; Cooperrider, N. K.
Page Count	108
Abstract	Wheel/rail geometric constraint relationships, such as the effective conicity and gravitational stiffness, strongly influence the lateral dynamics of railway vehicles. The principal curvatures of wheel and rail profiles are important parameters in the determination of creep coefficients used in rail vehicle models. In general, these geometric constraints and profile curvatures are nonlinear functions of the wheelset lateral displacement. This report is a users' manual for a computer program written in Fortran IV that uses iterative procedures to determine these nonlinear functions for arbitrary wheel and rail profiles. The program computes the wheel/rail contact positions, geometric constraint functions, and profile curvatures for any given wheel profile, rail profile, rail cant angle, and rail gauge for an asymmetric wheelset on asymmetric rails. Analytical methods used and program input and output are described. Results are in the form of printout, punched cards and drum plotter plots. The users' manual includes program listings, sample deck set-ups, and sample run output.
Keywords	Railroad tracks Vehicle wheels Rolling contact loads Rolling friction Fortran Computer programs User needs Rail wheel interaction WHRAILA computer program Fortran 4 programming language
Source Agency	Federal Railroad Administration
NTIS Subject Category	85C - Metropolitan Rail Transportation 85I - Railroad Transportation
Corporate Authors	Arizona State Univ., Tempe. Dept. of Mechanical Engineering.; Clemson Univ., S.C. Dept. of Mechanical Engineering.; Federal Railroad Administration, Washington, D.C. Office of Research and; Association of American Railroads, Chicago, Ill. Technical Center.
Supplemental Notes	Prepared in cooperation with Clemson Univ., S.C. Dept. of Mechanical Engineering and Association of American Railroads, Chicago, Ill. Technical Center.
Document Type	Technical Report
NTIS Issue Number	197816
Contract Number	DOT-OS-40018

Users' Manual for Asymmetric Wheel/Rail Contact Characterization Program.

Users' Manual for Asymmetric Wheel/Rail Contact Characterization Program.
PB279707

Publication Date	1977
Personal Author	Heller, R.; Cooperrider, N. K.
Page Count	108
Abstract	Wheel/rail geometric constraint relationships, such as the effective conicity and gravitational stiffness, strongly influence the lateral dynamics of railway vehicles. The principal curvatures of wheel and rail profiles are important parameters in the determination of creep coefficients used in rail vehicle models. In general, these geometric constraints and profile curvatures are nonlinear functions of the wheelset lateral displacement. This report is a users' manual for a computer program written in Fortran IV that uses iterative procedures to determine these nonlinear functions for arbitrary wheel and rail profiles. The program computes the wheel/rail contact positions, geometric constraint functions, and profile curvatures for any given wheel profile, rail profile, rail cant angle, and rail gauge for an asymmetric wheelset on asymmetric rails. Analytical methods used and program input and output are described. Results are in the form of printout, punched cards and drum plotter plots. The users' manual includes program listings, sample deck set-ups, and sample run output.
Keywords	Railroad tracks Vehicle wheels Rolling contact loads Rolling friction Fortran Computer programs User needs Rail wheel interaction WHRAILA computer program Fortran 4 programming language
Source Agency	Federal Railroad Administration
NTIS Subject Category	85C - Metropolitan Rail Transportation 85I - Railroad Transportation
Corporate Authors	Arizona State Univ., Tempe. Dept. of Mechanical Engineering.; Clemson Univ., S.C. Dept. of Mechanical Engineering.; Federal Railroad Administration, Washington, D.C. Office of Research and; Association of American Railroads, Chicago, Ill. Technical Center.
Supplemental Notes	Prepared in cooperation with Clemson Univ., S.C. Dept. of Mechanical Engineering and Association of American Railroads, Chicago, Ill. Technical Center.
Document Type	Technical Report
NTIS Issue Number	197816
Contract Number	DOT-OS-40018