prEN 16432-4

SLOVENSKI STANDARD
01-marec-2025
Železniške naprave - Progovni sistemi z utrjenimi tirnicami - 4. del: Posebni
progovni sistemi z utrjenimi tirnicami za dušenje vibracij
Railway applications - Ballastless track systems - Part 4: Special ballastless track
systems for attenuation of vibration
Bahnanwendungen - Feste Fahrbahn-Systeme - Teil 4: Spezielle Feste Fahrbahn-
Systeme zur Vibrationsdämpfung
Applications ferroviaires - Systèmes de voie sans ballast - Partie 4: Système spécial de
voie sans ballast pour l'atténuation des vibrations
Ta slovenski standard je istoveten z: prEN 16432-4
ICS:
17.160 Vibracije, meritve udarcev in Vibrations, shock and
vibracij vibration measurements
45.080 Tračnice in železniški deli Rails and railway
components
93.100 Gradnja železnic Construction of railways
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2024
ICS 93.100
English Version
Railway applications - Ballastless track systems - Part 4:
Special ballastless track systems for attenuation of
vibration
Applications ferroviaires - Systèmes de voie sans Bahnanwendungen - Feste Fahrbahn-Systeme - Teil 4:
ballast - Partie 4 : Système spéciale de voie sans ballast Spezielle Feste Fahrbahnsysteme zur
pour l'atténuation des vibrations Schwingungsdämpfung
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 256.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 16432-4:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Symbols and abbreviations . 7
5 Design approach . 8
6 System design . 8
6.1 Establishing the interface between acoustic design and track design . 8
6.2 Design implications arising from the integration of resilient elements for vibration
attenuation . 10
6.3 Control of vibrations using the rail fastening system alone . 11
6.4 Mass spring system (MSS) . 11
6.4.1 General. 11
6.4.2 System classification according to length . 12
6.4.3 Joints . 15
6.4.4 Transitions . 17
6.4.5 Lateral and longitudinal resilient elements . 17
6.5 MSS for switches and crossings . 21
6.6 Drainage . 22
6.7 Design requirements for maintenance and durability . 22
7 Acceptance. 23
7.1 Acceptance of design. 23
7.2 Acceptance of components . 23
7.3 Acceptance of works . 23
7.3.1 General. 23
7.3.2 Stage 1 – Before installation . 24
7.3.3 Stage 2 – Installation of resilient elements . 24
7.3.4 Stage 3 – Installed mitigation performance . 25
7.3.5 Stage 4 – Operational performance . 25
Annex A (informative) Typical workflow from design to installation of special ballastless
track systems for attenuation of vibration . 26
Annex B (informative) Simplified assessment of structural dynamics implications . 27
Bibliography . 30

European foreword
This document (prEN 16432-4:2024) has been prepared by Technical Committee CEN/TC 256 “Railway
Applications”, the secretariat of which is held by DIN.
This document is currently submitted to CEN enquiry.
Introduction
Ballastless track systems may be affected by acoustic requirements for the protection of the
environment against noise and vibration.
This document covers the integration of additional acoustic requirements in the ballastless track
system design.
This part of the EN 16432 series is used in conjunction with the following parts:
— Part 1: General requirements;
— Part 2: System design, subsystems and components;
— Part 3: Acceptance.
1 Scope
This part of EN 16432 series specifies how to integrate the particular aspects of ballastless track
systems for attenuation of vibration into the system and subsystem design and component
configuration according to EN 16432-2:2017.
The general system and subsystem design requirements are assigned from EN 16432-1:2017.
Additional noise and vibration requirements can be project specific and are not provided by this
document. Acoustic requirements are considered as input for the track design from the acoustic design.
The acoustic design and the track design affect each other and may require an iterative overall design
process.
The range of applicability covers all kind of rail systems including Urban Rail systems.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 1991 (all parts), Eurocode 1 — Actions on structures
EN 1992-1 (all parts), Eurocode 2 — Design of concrete structures — Part 1-2: Structural fire design
EN 16432-1:2017, Railway applications — Ballastless track systems — Part 1: General requirements
EN 16432-2:2017, Railway applications — Ballastless track systems — Part 2: System design, subsystems
and components
EN 16432-3:2021, Railway applications — Ballastless track systems — Part 3: Acceptance
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
EN 17682, Railway applications — Infrastructure — Resilient element for floating slab system
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1
mass spring system
ballastless track system using a designed mass in combination with its designed support stiffness
provided by resilient elements to tune it to a specific natural frequency
3.2
longitudinal resilient element
resilient element placed vertically for MSS in order to constrain the longitudinal movement of the mass
Note 1 to entry: It is installed perpendicular to the track axis.
3.3
lateral resilient element
resilient element placed vertically for MSS in order to constrain the lateral movement of the mass
Note 1 to entry: It is installed parallel to the track axis.
3.4
full surface resilient element
mat arranged between mass and its substructure to provide the required support stiffness
3.5
strip resilient element
linear support between mass and its substructure to provide the required support stiffness
3.6
discrete resilient element
point support between mass and its substructure to provide the required support stiffness
3.7
dynamic stiffness
force or stress per unit deflection measured under an uniaxial force which acts periodically at a given
frequency of (5 – 20) Hz between specific force or stress levels
Note 1 to entry: This value is determined mainly for calculation of dynamic deformation of tracks.
3.8
acoustic stiffness
dynamic stiffness of a resilient track support component that is measured under a static preload and at
small amplitudes of displacement or velocity applied in the frequency range relevant to noise or
vibration perception
3.9
insertion loss
relative reduction [dB] of vibration as a function of frequency resulting from the insertion of a
subsystem/component in the vibration transmission path
Key
X longitudinal direction
Y lateral direction
Z vertical direction
RE longitudinal resilient element
x
RE lateral resilient element
y
REz vertical resilient element
Figure 1 — Orientation of resilient elements (example: arranged as point supports)
4 Symbols and abbreviations
For the purposes of this document, the abbreviations in Table 1 apply.
Table 1 — Abbreviations
Abbreviation Abbreviated term
MSS Mass Spring System
CRCP Continuously Reinforced Concrete Pavement
MWCC Main Works Civil Contractor
GB N&V Ground Borne Noise and Vibration
S&C Switches and Crossings
FEM Finite Element Method
5 Design approach
The physical behaviour of ballastless track systems influences vibrations transmitted to the sub-
structure and noise emitted from the track. In situations where such vibrations or noise are
unacceptable due to local or regional requirements, the ballastless track system might be designed to
control vibration transmission and, therefore, incorporate elements, layers or components which in
turn might affect the
...