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Title:

EFFECT OF PAVEMENT CONDITION ON DYNAMIC VEHICLE REACTIONS

Accession Number:

00206760

Record Type:

Component

Abstract:

A VEHICLE TRAVELING OVER A HIGHWAY CONTAINING SURFACE IRREGULARITIES EXPERIENCES VERTICAL MOTION AS WELL AS HORIZONTAL MOTION. ASSOCIATED WITH THE VERTICAL MOTION ARE FORCES BETWEEN THE HIGHWAY AND THE VEHICLE THAT ARE DEVELOPED IN ADDITION TO THE STATIC WEIGHT OF THE VEHICLE. THESE FORCES ARE FREQUENTLY REFERRED TO AS THE DYNAMIC REACTIONS OR THE DYNAMIC FORCES. THEY DEPEND ON THE VEHICLE SUSPENSION CHARACTERISTICS, THE CONDITION OF THE PAVEMENT, AND THE VELOCITY OF THE VEHICLE. LABORATORY TESTS WERE CONDUCTED TO DETERMINE THE FREQUENCIES OF VIBRATION AT WHICH PASSENGER VEHICLES WOULD DEVELOP LARGE FORCES BETWEEN THE TIRES AND THE PAVEMENT. THE RELATIONSHIP BETWEEN FORCE EXERTED BY THE TIRE AND VERTICAL DISPLACEMENT OF THE TIRE TREAD WAS MEASURED AT ALL FREQUENCIES AT WHICH ANY APPRECIABLE FORCE WAS DEVELOPED. THE VEHICLE CHARACTERISTIC THUS OBTAINED INCLUDED THE ACTUAL EFFECTS OF ALL COMPONENTS OF THE VEHICLE SUSPENSION SYSTEM. A CRITERION OF PAVEMENT CONDITION WAS ESTABLISHED BY MAKING POWER SPECTRAL DENSITY ANALYSES OF HIGHWAY ELEVATION MEASUREMENTS. A BRIEF DESCRIPTION OF THE PHYSICAL SIGNIFICANCE OF THIS CRITERION IS INCLUDED. A PROCEDURE IS DISCUSSED FOR COMBINING THE VEHICLE CHARACTERISTICS WITH AN ELEVATION POWER SPECTRUM (PAVEMENT CONDITION CRITERION) AT A SELECTED VEHICLE VELOCITY TO OBTAIN A DYNAMIC FORCE POWER SPECTRUM. THE USEFULNESS OF THIS RESULT IS DISCUSSED AND CURVES OF THE ROOT-MEAN SQUARED VALUE OF THE DYNAMIC FORCE VS VEHICLE VELOCITY ARE INCLUDED FOR THREE DIFFERENT PAVEMENT CONDITIONS. BY USING THE CRITERION OF PAVEMENT CONDITION AS DEFINED IN THIS PAPER, IT IS POSSIBLE TO ESTIMATE THE DYNAMIC FORCE THAT ONE WHEEL OF A VEHICLE WILL EXERT ON A HIGHWAY. /AUTHOR/

Supplemental Notes:

Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

Monograph Accession #:

01410709

Authors:

Quinn, Bayard E
Thompson, David R

Pagination:

pp 24-32

Publication Date:

1962

Serial:

Highway Research Board Bulletin

Issue Number: 328
Publisher: Highway Research Board

Conference:

41st Annual Meeting of the Highway Research Board

Location: Washington DC, United States
Date: 1962-1-8 to 1962-1-12
Sponsors: National Research Council

Media Type:

Digital/other

Features:

Figures (9) ; References (6)

Uncontrolled Terms:

Dynamic response

Subject Areas:

Highways; Pavements; Vehicles and Equipment

Files:

TRIS, TRB, ATRI

Created Date:

Aug 12 1994 12:00AM

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