IEC 60721-2-9:2014

Classification of environmental conditions - Part 2-9: Environmental conditions appearing in nature - Measured shock and vibration data - Storage, transportation and in-use

IEC 60721-2-9:2014 is intended to be used to define the strategy for arriving at an environmental description from measured data when related to a product's life cycle. Its object is to define fundamental properties and quantities for characterization of storage, transportation and in-use shock and vibration data as background material for the severities to which products are liable to be exposed during those phases of their lifecycle.

Classification des conditions d'environnement - Partie 2-9: Conditions d'environnement présentes dans la nature - Données de chocs et de vibrations mesurées - Stockage, transport et utilisation

L'IEC 60721-2-9:2014 sert à définir la méthode de réalisation d'une description de l'environnement, qui se rapporte au cycle de vie des produits, à l'aide de données mesurées. Elle a pour objet de définir les propriétés et grandeurs fondamentales pour la caractérisation des données de chocs et de vibrations, pendant le stockage, le transport et l'utilisation des produits, en tant que données de base des sévérités auxquelles les produits sont susceptibles d'être exposés au cours des phases de leur cycle de vie.

General Information

• Status: Published
• Publication Date: 05-Mar-2014
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 19.040 - Environmental testing
• Technical Committee: TC 104 - Environmental conditions, classification and methods of test
• Drafting Committee: MT 19 - TC 104/MT 19
• Current Stage: PPUB - Publication issued
• Start Date: 15-Mar-2014
• Completion Date: 06-Mar-2014

Standards Content (Sample)

IEC 60721-2-9 ®
Edition 1.0 2014-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Classification of environmental conditions –
Part 2-9: Environmental conditions appearing in nature – Measured shock and
vibration data – Storage, transportation and in-use

Classification des conditions d’environnement –
Partie 2-9: Conditions d’environnement présentes dans la nature – Données de
chocs et de vibrations mesurées – Stockage, transport et utilisation

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IEC 60721-2-9 ®
Edition 1.0 2014-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Classification of environmental conditions –

Part 2-9: Environmental conditions appearing in nature – Measured shock and

vibration data – Storage, transportation and in-use

Classification des conditions d’environnement –

Partie 2-9: Conditions d’environnement présentes dans la nature – Données de

chocs et de vibrations mesurées – Stockage, transport et utilisation

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX R
ICS 19.040 ISBN 978-2-8322-1446-6

– 2 – IEC 60721-2-9:2014 © IEC 2014
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope and object . 6
2 Normative references . 6
3 General . 6
3.1 Introductory remarks . 6
3.2 Storage . 7
3.3 Transportation . 7
3.3.1 Road . 7
3.3.2 Rail . 7
3.3.3 Air . 8
3.3.4 Sea . 8
3.4 In-use . 8
4 Shock and vibration data . 9
5 Description of the methods . 9
5.1 General . 9
5.2 ASD envelope method . 9
5.3 Normal tolerance limit method . 10
5.4 Product axis . 11
5.4.1 Known axis . 11
5.4.2 Unknown axis . 12
5.5 Factoring for variables and unknowns . 12
Annex A (informative) Worked example . 13
A.1 Envelope curve . 13
A.2 NTL curve calculation . 13
A.3 Processing of the envelope curve and NTL curve . 13
Annex B (informative) Method to smooth and envelop an environmental description
spectrum . 15
B.1 Original data . 15
B.2 Octave averaging . 15
B.3 Averaging method . 15
B.4 Standard slope curves . 16
B.5 Comparison of envelope and NTL curves . 17
Bibliography . 19

Figure A.1 – Comparison of curves 1 to 5 and the envelope curve 7 and 95/50 NTL
curve 6 . 14
Figure B.1 – 95/50 NTL envelope of data . 15
Figure B.2 – 95/50 NTL envelope of data . 16
Figure B.3 – 1/3 octave averaged with standard slopes . 17
Figure B.4 – Comparison of curves with increasing normal tolerance factors C . 18

Table 1 – Normal tolerance factors, C . 11
Table A.1 – Example of five hypothetical curves for random vibration . 13
Table A.2 – Calculation for the five hypothetical curves . 14

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CLASSIFICATION OF ENVIRONMENTAL CONDITIONS –

Part 2-9: Environmental conditions appearing in nature –
Measured shock and vibration data –
Storage, transportation and in-use

FOREWORD
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