BS EN 60068-2-57:2013
$189.07
Environmental testing – Tests. Test Ff: Vibration. Time-history and sine-beat method
| Published By | Publication Date | Number of Pages |
| BSI | 2013 | 46 |
IEC 60068-2-57:2013 provides a standard procedure for determining, by the time-history and sine-beat methods, the ability of a specimen to withstand specified severities of transient vibration. This third edition cancels and replaces the second edition, published in 1999. It also replaces IEC 60068-2-59:1990, which will be withdrawn. This edition includes only minor technical changes with respect to the previous edition: – editorially combines IEC 60068-2-57 and IEC 60068-2-59; – the title has been modified to include a sine beat method. This publication is to be read in conjunction with /2.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 6 | English CONTENTS |
| 8 | INTRODUCTION |
| 9 | Figure 1 – Sequence of five sine beats with five cycles |
| 10 | 1 Scope 2 Normative references 3 Terms and definitions |
| 15 | Figure 2 – Number of cycles per sine beat |
| 16 | Figure 3 – Typical time history Figure 4 – Typical logarithmic plot of a required response spectrum,test response spectrum and tolerance zone |
| 17 | 4 Test requirements and associated parameters 4.1 General 4.2 Requirements for testing Table 1 – Comparison of tolerances |
| 18 | 4.3 Vibration response investigation 4.3.1 General 4.3.2 Basic motion 4.3.3 Transverse motion 4.3.4 Rotational motion 4.3.5 Measuring points |
| 19 | 4.3.6 Vibration amplitude tolerances 4.3.7 Frequency tolerances 4.3.8 Sweeping 4.3.9 Damping ratio |
| 20 | 4.4 Time-history testing 4.4.1 Basic motion 4.4.2 Transverse motion 4.4.3 Rotational motion 4.4.4 Tolerance zone for the required response spectrum |
| 21 | 4.4.5 Frequency range 4.5 Sine-beat testing 4.5.1 General description 4.5.2 Vibration amplitude tolerances 4.5.3 Test frequency tolerances 4.5.4 Transverse motion |
| 22 | 4.6 Mounting 5 Severities 5.1 General 5.2 Time history |
| 23 | 5.3 Test frequency range 5.4 Required response spectrum 5.5 Number and duration of time-histories 5.5.1 Number of time histories 5.5.2 Time-history duration Figures Tables Table 2 – Recommended test frequency ranges |
| 24 | 5.5.3 Duration of the strong part of the time history 5.5.4 Number of high stress cycles Figure 5 – Typical response of an oscillator excited bya specific time history during a test |
| 25 | 5.6 Sine-beat test level 5.6.1 General Table 3 – Recommended test levels with a crossover frequencyof 0,8 Hz (see Figure 6) |
| 26 | Figure 6 – Recommended test level with crossover frequency at 0,8 Hz |
| 27 | Table 4 – Recommended test levels with a crossover frequencyof 1,6 Hz (see Figure 7) |
| 28 | Figure 7 – Recommended test level with crossover frequency at 1,6 Hz |
| 29 | Table 5 – Recommended test levels with a crossover frequencyof 8 Hz (see Figure 8) |
| 30 | Figure 8 – Recommended test level with crossover frequency at 8 Hz |
| 31 | 5.6.2 Test frequency determination 5.6.3 Sine-beat test wave 5.6.4 Number of cycles in the sine beat |
| 32 | 5.6.5 Modulating frequency Figure 9 – Amplification factors of different sine beats, continuous sineand a typical natural time-history |
| 33 | 5.6.6 Number of sine beats 5.6.7 High-stress low-cycle fatigue effects 6 Preconditioning 7 Initial measurements 8 Testing 8.1 General 8.2 Vibration response investigation |
| 34 | 8.3 Time-history testing 8.4 Sine-beat testing 8.5 Multi-axis testing 8.5.1 General 8.5.2 Single axis testing 8.5.3 Biaxial testing 8.5.4 Triaxial testing |
| 35 | 9 Intermediate measurements 10 Recovery 11 Final measurements 12 Information to be given in the relevant specification |
| 36 | 13 Information to be given in the test report |
| 37 | Annex A (informative)Guidance for time-history and sine-beat methods |
| 39 | Figure A.1 – Recommended shape of a required response spectrumin generalized form |
| 42 | Figure A.2 – Standardized presentation of matched sine beatsof acceleration, velocity and displacement (five cycles within the sine beat of acceleration) |
| 43 | Bibliography |
