BSI PD IEC/TR 62131-3:2011
$198.66
Environmental conditions. Vibration and shock of electrotechnical equipment – Equipment transported in rail vehicles
| Published By | Publication Date | Number of Pages |
| BSI | 2011 | 54 |
IEC/TR 62131-3, which is a technical report, reviews the available dynamic data relating to electrotechnical equipment transported by rail vehicles. The intent is that from all the available data an environmental description will be generated and compared to that set out in IEC 60721.
For each of the sources identified the quality of the data is reviewed and checked for self consistency. The process used to undertake this check of data quality and that used to intrinsically categorize the various data sources is set out in IEC/TR 62131-1.
This technical report primarily addresses data extracted from a number of different sources for which reasonable confidence exist as to their quality and validity. The assessment also presents data for which the quality and validity cannot realistically be reviewed. These data are included to facilitate validation of information from other sources. The report clearly indicates when it utilizes information in this latter category.
This technical report addresses vibration and shock data from three different measurement exercises, i.e. one on the UK rail system and two on the USA rail system. Although one of these relates to a multimodal system in limited use world wide, data from it are included to facilitate validation of information from other sources. The vast majority of the rail measurements reviewed are from the USA and the remainder from Western Europe. Some of the data sources considered indicate the inclusion of some quite old vehicles. It has not been possible to identify the rail data considered in setting the existing IEC 60721 severities.
Although the majority of the measurement exercises considered in this technical report supplied both vibration and shock information, a number of measurement exercises are biased towards the shock conditions of rail transportation. The severity and incidence of shocks is mostly related to the occurrence shunting of individual wagons. The occurrence of shunting of individual wagons is in turn dependant upon the operational strategy adopted by the national rail systems. A significant number of rail systems no longer adopt methods of operation which assemble train sets when the wagons are carrying sophisticated goods (carriage of bulky raw minerals is a common exception). Other rail systems purposely utilize good quality wagons and/or procedures of operation to significantly mitigate shunting loads. These strategies are intended to minimize shock severities for sensitive equipment such as electrotechnical equipment.
Relatively little of the data reviewed have been available in electronic form. To permit comparison a quantity of the original (non-electronic) data have been manually digitized in this techical report.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | CONTENTS |
| 7 | FOREWORD |
| 9 | 1 Scope 2 Normative references |
| 10 | 3 Data source and quality 3.1 UK rail measurements |
| 11 | 3.2 Association of American Railroads – Lengthways shocks |
| 12 | 3.3 Association of American Railroads – Intermodal environment 3.4 Association of American Railroads – Study of the shock and vibration environment in boxcars |
| 13 | 3.5 Association of American Railroads – Study of the railroad shock and vibration environment for railroader equipment 3.6 Supplementary data |
| 14 | 4 Intra data source comparison 4.1 General remark 4.2 UK Rail measurements |
| 15 | 4.3 Association of American Railroads – Lengthways shocks 4.4 Association of American Railroads – Intermodal environment |
| 16 | 4.5 Association of American Railroads – Study of the shock and vibration environment in boxcars 4.6 Association of American Railroads – Study of the railroad shock and vibration environment for railroader equipment |
| 17 | 4.7 Supplementary data 5 Inter data source comparison |
| 19 | 6 Environmental description |
| 20 | 7 Comparison with IEC 60721 |
| 22 | 8 Recommendations |
| 24 | Figures Figure 1 – British Rail measured vertical vibration severities Figure 2 – British Rail measured lateral vibration severities |
| 25 | Figure 3 – British Rail measurements distribution of shunting velocities Tables Table 1 – British Rail measurements summary of vibration measurements |
| 26 | Figure 4 – Association of American Railroads –Lengthways shock measurements – Example shock pulses |
| 27 | Figure 5 – Association of American Railroads –Lengthways shock measurements – Comparison of positive peak acceleration Figure 6 – Association of American Railroads –Lengthways shock measurements – Comparison of negative peak acceleration |
| 28 | Figure 7 – Association of American Railroads – Lengthways shock measurements – Comparison of RMS acceleration Figure 8 – Association of American Railroads – Lengthways shock measurements – Comparison of crest factor |
| 29 | Figure 9 – Association of American Railroads – Lengthways shock measurements – Comparison of change of velocity Figure 10 – Association of American Railroads – Lengthways shock measurements – Comparison of filtered peak acceleration |
| 30 | Figure 11 – Association of American Railroads – Intermodal study –Amplitude probability in longitudinal axis Table 2 – Association of American Railroads intermodal study as it relates to Figure 11 |
| 31 | Figure 12 – Association of American Railroads intermodal study –amplitude probability in lateral axis Table 3 – Association of American Railroads – Intermodal study as it relates to Figure 12 |
| 32 | Figure 13 – Association of American Railroads intermodal study –Amplitude probability in vertical axis Table 4 – Association of American Railroads – Intermodal study as it relates to Figure 13 |
| 33 | Table 5 – Association of American Railroads intermodal study – Summary of results from shock measurements Table 6 – Association of American Railroads intermodal study– Summary of results from vibration measurements |
| 34 | Figure 14 – Association of American Railroads – Intermodal study –Vertical axis spectral values Figure 15 – Association of American Railroads – Intermodal study –Lateral axis spectral values |
| 35 | Figure 16 – Association of American Railroads – Intermodal study –Longitudinal axis spectral values Figure 17 – Association of American Railroads – Boxcar measurements –Vertical axis spectral values |
| 36 | Figure 18 – Association of American Railroads – Boxcar measurements –Lateral axis spectral values Figure 19 – Association of American Railroads – Boxcar measurements –Longitudinal axis spectral values |
| 37 | Figure 20 – Association of American Railroads –Cushioned boxcar measurements – Middle of car Figure 21 – Association of American Railroads –Cushioned boxcar measurements – End of car |
| 38 | Figure 22 – Association of American Railroads –Standard boxcar measurements – Middle of car Figure 23 – Association of American Railroads –Standard boxcar measurements – End of car |
| 39 | Figure 24 – Association of American Railroads – Railroader measurements –Peak spectral value Table 7 – Association of American Railroads – Boxcar measurements –Distribution of shocks |
| 40 | Figure 25 – Association of American Railroads – Railroader measurements –Amplitude probabilities Table 8 – Association of American Railroads –Railroader measurements as they relate to Figure 25 |
| 41 | Figure 26 – Johnson – Reported measurements – Spring buffers Figure 27 – Johnson – Reported measurements hydraulic buffers |
| 42 | Figure 28 – Johnson – Reported measurements – Probability of occurrence Figure 29 – Foley – Reported measurements – Frequency distribution |
| 43 | Figure 30 – Foley – Reported measurements – Recurrent events Figure 31 – Foley – Reported measurements – Intermittent events |
| 44 | Figure 32 – GAM-EG-13 – Reported measurements – Longitudinal axis Figure 33 – GAM-EG-13 – Reported measurements – Lateral axis |
| 45 | Figure 34 – GAM-EG-13 – Reported measurements – Vertical axis Figure 35 – GAM-EG-13 – Reported measurements – Longitudinal shocks |
| 46 | Figure 36 – GAM-EG-13 – Reported measurements – Vertical shocks Figure 37 – ASTM D4728-95 – Reported measurements |
| 47 | Figure 38 – IEC 60721-3-2:1997 – Random vibration severity Figure 39 – IEC 60721-4-2:1997 – Random vibration severity |
| 48 | Figure 40 – IEC 60721-3-2:1997 – Sinusoidal vibration severity Figure 41 – IEC 60721-4-2:1997 – Sinusoidal vibration severity |
| 49 | Figure 42 – IEC 60721-3-2:1997 – Shock severity Figure 43 – IEC 60721-4-2:1997 – Shock severity |
| 50 | Figure 44 – IEC 60721-4:1997 – Recommended repeated shock severity |
| 51 | Bibliography |
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BSI PD IEC/TR 62131-3:2011
Environmental conditions. Vibration and shock of electrotechnical equipment – Equipment transported in rail vehicles Published…
