BS EN 17495:2022 PDF

Scope: 1 Scope This document specifies laboratory test procedures to determine a high-frequency dynamic stiffness, “ acoustic stiffness ”, of resilient components of rail fastening assemblies. This document is applicable to complete rail fastening assemblies and to pad components of fastening systems including both discrete and continuous fastening systems. It is applicable to the measurement of the dynamic transfer stiffness under a prescribed pre-load and the associated hysteretic damping loss factor. It provides measurement methods and pre-load, excitation and frequency range conditions for application to ground borne and structure borne noise as well as for rolling noise. It is not applicable to the measurement of the stiffness of pads and fastening assemblies under static or low-frequency dynamic loading used for track mechanics.

BS EN 17495:2022 Referenced Document

EN 13481-1 Railway Applications - Track - Performance Requirements for Fastening Systems - Part 1: Definitions Includes A1: August 2006
EN ISO 10846-1 Acoustics and vibration - Laboratory measurement of vibro-acoustic transfer properties of resilient elements - Part 1: Principles and guidelines (ISO 10846-1:2008)
EN ISO 10846-2 Acoustics and vibration - Laboratory measurement of vibro-acoustic transfer properties of resilient elements - Part 2: Direct method for determination of the dynamic stiffness of resilient supports for translatory motion (ISO 10846-2:2008)
EN ISO 10846-3 Acoustics and vibration - Laboratory measurement of vibro-acoustic transfer properties of resilient elements - Part 3: Indirect method for determination of the dynamic stiffness of resilient supports for translatory motion
EN ISO 7500-1:2018 Metallic materials - Verification of static uniaxial testing machines - Part 1: Tension/compression testing machines - Verification and calibration of the force-measuring system
ISO 21948 Coated abrasives - Plain sheets
ISO 7626-1:2011 Mechanical vibration and shock - Experimental determination of mechanical mobility - Part 1: Basic terms and definitions, and transducer specifications

2022 BS EN 17495:2022 Railway Applications. Acoustics. Determination of the dynamic stiffness of elastic track components related to noise and vibration: Rail pads and rail fastening assemblies