Other Reports

Wz Rating of Ride Quality Implementation for FRA/Amtrack Programs

  • 24
  • Jan
  • 1977
AUTHOR: James Adair
OFFICE: RPD
REPORT NUMBER: DOT-FR-64113
SUBJECT: Evaluation
KEYWORDS: Ride Roughness, Mathematical Model, Research
ABSTRACT: [From the study's description] The Wz method of rating the ride of a rail vehicle has been widely used in recent decades. This method applies a single number to describe the quality of the ride. The instantaneous acceleration is measured and weighted in the frequency domain. This value is squared, averaged over time and the 6.67th root is taken. This final number is the Wz rating.

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