2011 Edition, May 1, 2011
Measurement and Presentation of Truck Ride Vibrations
Includes all amendments and changes through Stabilization Notice (No longer revised / updated) , May 2011
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STANDARD SPECIFICATION FOR STEEL, SHEET AND STRIP, HOT-ROLLED, CARBON, STRUCTURAL, HIGH-STRENGTH LOW-ALLOY, HIGH-STRENGTH LOW-ALLOY WITH IMPROVED FORMABILITY, AND ULTRA-HIGH STRENGTH
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2015 Edition, November 1, 2015
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Description / Abstract:
There are two ways to assess the characteristics of ride
vibrations of a vehicle during its operation. Subjective evaluation
and objective measurement. Subjective assessments of the ride
vibrations experienced by drivers during ride evaluations are
generally performed by a panel of drivers and/or passengers who are
instructed to operate or ride a group of vehicles in a
predetermined manner in order to subjectively assess the levels and
characteristics of ride vibrations. Figures 6A through 6C show
examples of subjective evaluation forms presently in use. The
disadvantages of the subjective method include need for careful
experimental design, need for statistically unbiased samples,
complexity of human perceptions of vibrations, and difficulty in
comparing qualitative data of vehicles evaluated at different times
and/or by different groups of people. Often ride characterization
is not an easy task using only qualitative or descriptive terms.
Therefore, it is necessary and desirable to develop objective
techniques to enable ride engineers and others to measure ride
vibrations during ride assessment in a quantitative manner.