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.<\/p>\n
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.<\/p>\n
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.<\/p>\n
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.<\/p>\n
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.<\/p>\n
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.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 4<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 3 Data source and quality 3.1 UK rail measurements <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 3.2 Association of American Railroads \u2013 Lengthways shocks <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 3.3 Association of American Railroads \u2013 Intermodal environment 3.4 Association of American Railroads \u2013 Study of the shock and vibration environment in boxcars <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 3.5 Association of American Railroads \u2013 Study of the railroad shock and vibration environment for railroader equipment 3.6 Supplementary data <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 4 Intra data source comparison 4.1 General remark 4.2 UK Rail measurements <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 4.3 Association of American Railroads \u2013 Lengthways shocks 4.4 Association of American Railroads \u2013 Intermodal environment <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 4.5 Association of American Railroads \u2013 Study of the shock and vibration environment in boxcars 4.6 Association of American Railroads \u2013 Study of the railroad shock and vibration environment for railroader equipment <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 4.7 Supplementary data 5 Inter data source comparison <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 6 Environmental description <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 7 Comparison with IEC\u00a060721 <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 8 Recommendations <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Figures \n Figure 1 \u2013 British Rail measured vertical vibration severities Figure 2 \u2013 British Rail measured lateral vibration severities <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | Figure 3 \u2013 British Rail measurements distribution of shunting velocities Tables \n Table 1 \u2013 British Rail measurements summary of vibration measurements <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | Figure 4 \u2013 Association of American Railroads \u2013Lengthways shock measurements \u2013 Example shock pulses <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | Figure 5 \u2013 Association of American Railroads \u2013Lengthways shock measurements \u2013 Comparison of positive peak acceleration Figure 6 \u2013 Association of American Railroads \u2013Lengthways shock measurements \u2013 Comparison of negative peak acceleration <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | Figure 7 \u2013 Association of American Railroads \u2013 Lengthways shock measurements \u2013 Comparison of RMS acceleration Figure 8 \u2013 Association of American Railroads \u2013 Lengthways shock measurements \u2013 Comparison of crest factor <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Figure 9 \u2013 Association of American Railroads \u2013 Lengthways shock measurements \u2013 Comparison of change of velocity Figure 10 \u2013 Association of American Railroads \u2013 Lengthways shock measurements \u2013 Comparison of filtered peak acceleration <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | Figure 11 \u2013 Association of American Railroads \u2013 Intermodal study \u2013Amplitude probability in longitudinal axis Table 2 \u2013 Association of American Railroads intermodal study as it relates to Figure 11 <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | Figure 12 \u2013 Association of American Railroads intermodal study \u2013amplitude probability in lateral axis Table 3 \u2013 Association of American Railroads \u2013 Intermodal study as it relates to Figure 12 <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | Figure 13 \u2013 Association of American Railroads intermodal study \u2013Amplitude probability in vertical axis Table 4 \u2013 Association of American Railroads \u2013 Intermodal study as it relates to Figure 13 <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Table 5 \u2013 Association of American Railroads intermodal study \u2013 Summary of results from shock measurements Table 6 \u2013 Association of American Railroads intermodal study\u2013 Summary of results from vibration measurements <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Figure 14 \u2013 Association of American Railroads \u2013 Intermodal study \u2013Vertical axis spectral values Figure 15 \u2013 Association of American Railroads \u2013 Intermodal study \u2013Lateral axis spectral values <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | Figure 16 \u2013 Association of American Railroads \u2013 Intermodal study \u2013Longitudinal axis spectral values Figure 17 \u2013 Association of American Railroads \u2013 Boxcar measurements \u2013Vertical axis spectral values <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Figure 18 \u2013 Association of American Railroads \u2013 Boxcar measurements \u2013Lateral axis spectral values Figure 19 \u2013 Association of American Railroads \u2013 Boxcar measurements \u2013Longitudinal axis spectral values <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Figure 20 \u2013 Association of American Railroads \u2013Cushioned boxcar measurements \u2013 Middle of car Figure 21 \u2013 Association of American Railroads \u2013Cushioned boxcar measurements \u2013 End of car <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | Figure 22 \u2013 Association of American Railroads \u2013Standard boxcar measurements \u2013 Middle of car Figure 23 \u2013 Association of American Railroads \u2013Standard boxcar measurements \u2013 End of car <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | Figure 24 \u2013 Association of American Railroads \u2013 Railroader measurements \u2013Peak spectral value Table 7 \u2013 Association of American Railroads \u2013 Boxcar measurements \u2013Distribution of shocks <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | Figure 25 \u2013 Association of American Railroads \u2013 Railroader measurements \u2013Amplitude probabilities Table 8 \u2013 Association of American Railroads \u2013Railroader measurements as they relate to Figure 25 <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | Figure 26 \u2013 Johnson \u2013 Reported measurements \u2013 Spring buffers Figure 27 \u2013 Johnson \u2013 Reported measurements hydraulic buffers <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | Figure 28 \u2013 Johnson \u2013 Reported measurements \u2013 Probability of occurrence Figure 29 \u2013 Foley \u2013 Reported measurements \u2013 Frequency distribution <\/td>\n<\/tr>\n | ||||||
| 43<\/td>\n | Figure 30 \u2013 Foley \u2013 Reported measurements \u2013 Recurrent events Figure 31 \u2013 Foley \u2013 Reported measurements \u2013 Intermittent events <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | Figure 32 \u2013 GAM-EG-13 \u2013 Reported measurements \u2013 Longitudinal axis Figure 33 \u2013 GAM-EG-13 \u2013 Reported measurements \u2013 Lateral axis <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | Figure 34 \u2013 GAM-EG-13 \u2013 Reported measurements \u2013 Vertical axis Figure 35 \u2013 GAM-EG-13 \u2013 Reported measurements \u2013 Longitudinal shocks <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | Figure 36 \u2013 GAM-EG-13 \u2013 Reported measurements \u2013 Vertical shocks Figure 37 \u2013 ASTM D4728-95 \u2013 Reported measurements <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | Figure 38 \u2013 IEC\u00a060721-3-2:1997 \u2013 Random vibration severity Figure 39 \u2013 IEC\u00a060721-4-2:1997 \u2013 Random vibration severity <\/td>\n<\/tr>\n | ||||||
| 48<\/td>\n | Figure 40 \u2013 IEC\u00a060721-3-2:1997 \u2013 Sinusoidal vibration severity Figure 41 \u2013 IEC\u00a060721-4-2:1997 \u2013 Sinusoidal vibration severity <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | Figure 42 \u2013 IEC\u00a060721-3-2:1997 \u2013 Shock severity Figure 43 \u2013 IEC\u00a060721-4-2:1997 \u2013 Shock severity <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | Figure 44 \u2013 IEC\u00a060721-4:1997 \u2013 Recommended repeated shock severity <\/td>\n<\/tr>\n | ||||||
| 51<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Environmental conditions. Vibration and shock of electrotechnical equipment – Equipment transported in rail vehicles<\/b><\/p>\n |