BS EN 60721-2-9:2014
$102.76
Classification of environmental conditions – Environmental conditions appearing in nature. Measured shock and vibration data. Storage, transportation and in-use
| Published By | Publication Date | Number of Pages |
| BSI | 2014 | 22 |
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.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 5 | English CONTENTS |
| 6 | INTRODUCTION |
| 7 | 1 Scope and object 2 Normative references 3 General 3.1 Introductory remarks |
| 8 | 3.2 Storage 3.3 Transportation 3.3.1 Road 3.3.2 Rail |
| 9 | 3.3.3 Air 3.3.4 Sea 3.4 In-use |
| 10 | 4 Shock and vibration data 5 Description of the methods 5.1 General 5.2 ASD envelope method |
| 11 | 5.3 Normal tolerance limit method |
| 12 | 5.4 Product axis 5.4.1 Known axis Tables Table 1 – Normal tolerance factors, C |
| 13 | 5.4.2 Unknown axis 5.5 Factoring for variables and unknowns |
| 14 | Annex A (informative) Worked example A.1 Envelope curve A.2 NTL curve calculation A.3 Processing of the envelope curve and NTL curve Table A.1 – Example of five hypothetical curves for random vibration |
| 15 | Figures Figure A.1 – Comparison of curves 1 to 5 and the envelope curve 7 and 95/50 NTL curve 6 Table A.2 – Calculation for the five hypothetical curves |
| 16 | Annex B (informative) Method to smooth and envelop an environmental description spectrum B.1 Original data B.2 Octave averaging B.3 Averaging method Figure B.1 – 95/50 NTL envelope of data |
| 17 | B.4 Standard slope curves Figure B.2 – 95/50 NTL envelope of data including the |
| 18 | B.5 Comparison of envelope and NTL curves Figure B.3 – 1/3 octave averaged with standard slopes |
| 19 | Figure B.4 – Comparison of curves with increasing normal tolerance factors C |
| 20 | Bibliography |
