Title

Measurements of Nonlinear Wheelset Forces in Flange Contact Using Dynamically Scaled Models

Creator

Sweet, Larry M.

Sivak, Joseph A.

Putnam, William F.

Date

1980

Identifier

PB80190747

Abstract

This report presents new experimental methods for the study of rail vehicle dynamics through the use of scaled models on tangent track, and the application of these techniques to the measurement of nonlinear wheelset force/displacement relations in steady state. These relations are important to the analysis of wheelset response to track inputs, curving performance of trucks, and wheelclimb derailment. A on-fifth scale model instrumented wheelset with new wheel profiles is used, with similitude scaling of the contact forces achieved through use of a polycarbonate resin for the contact surfaces. Data are presented for wheelset lateral force and yaw moment for the nonlinear range of wheelset lateral displacements and yaw angles, including flange contact. The measured data validate the analytical model presented in a companion report, base on nonlinear wheel/rail contact geometry, creep forces with adhesion limits, and wheelset kinematics. A criterion for wheelclimb derailment is presented and verified experimentally.

Date Issued

1980-03

Extent

99

Corporate Author

Department of Mechanical & Aerospace Engineering, Princeton University

Laboratory

Office of University Research

Corporate Report Number

MAE Technical Report 1406

Report Number

DOT-RSPA-DPB-50/80/6

PB Number

PB80190747

Contract

DOT-OS-60147

NTRL Accession Number

PB80190747

Distribution Conflict

No

Access Rights

Document is available to the U.S. Public through The National Technical Information Service, Springfield, Virginia 22161

Photo Quality

Incomplete

Distribution Classification

1

DTIC Record Exists

No

Report Availability

Full text available by request

Provenance

S. Kumar

Type

report

Format

99 pages ; 28 cm.