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Application of ISO 2631-1 (1997) for evaluating discomfort from whole-body vibration: verification using field and laboratory studies Dr. Ykä Marjanen and Dr. Neil J. Mansfield Loughborough University, UK
The goal of the research Provide a practical method for engineers to minimize the negative effects of vibration
Effects of vibration exposure Health Dis-comfort Back pain Long term effects Many variables Complex cause-effect  relationship More psychological Immediate feedback Less variables Simpler cause-effect  relationship
Current knowledge
Current knowledge Little information on effect of time Little information on the variability of sex and size of a person Few studies on combining the axes Few studies on determining best averaging  method One study of using all 12 axes in field One study to determine correlation in field
Evaluation of ISO 2631-1 Is the standard method valid? What is best approach of using it? How well does it predict discomfort?
Which axes dominate in field
Validating the standard method Seat translational axes are enough for prediction Frequency weighting works R.m.s. is better than r.m.q. Multiplying factors do not work  well
Improving the standard method
Simplifying the guidance on using the method Measure three translational axes from the seat Use the r.m.s. method to average them Combine to a single value using 1.4 multiplying factors Compare two or more setups in same environment
Concluding the necessary changes and research for improving the method Getting rid of the options for using the additional axes Providing guidance on how to interpret the results Providing a method to optimize multiplying factors for different environments

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Improving ISO 2631-1 for evaluating discomfort from vibration

  • 1. Application of ISO 2631-1 (1997) for evaluating discomfort from whole-body vibration: verification using field and laboratory studies Dr. Ykä Marjanen and Dr. Neil J. Mansfield Loughborough University, UK
  • 2. The goal of the research Provide a practical method for engineers to minimize the negative effects of vibration
  • 3. Effects of vibration exposure Health Dis-comfort Back pain Long term effects Many variables Complex cause-effect relationship More psychological Immediate feedback Less variables Simpler cause-effect relationship
  • 5. Current knowledge Little information on effect of time Little information on the variability of sex and size of a person Few studies on combining the axes Few studies on determining best averaging method One study of using all 12 axes in field One study to determine correlation in field
  • 6. Evaluation of ISO 2631-1 Is the standard method valid? What is best approach of using it? How well does it predict discomfort?
  • 8. Validating the standard method Seat translational axes are enough for prediction Frequency weighting works R.m.s. is better than r.m.q. Multiplying factors do not work well
  • 10. Simplifying the guidance on using the method Measure three translational axes from the seat Use the r.m.s. method to average them Combine to a single value using 1.4 multiplying factors Compare two or more setups in same environment
  • 11. Concluding the necessary changes and research for improving the method Getting rid of the options for using the additional axes Providing guidance on how to interpret the results Providing a method to optimize multiplying factors for different environments

Editor's Notes

  • #3: Mikä on meidän tavoitteena kun tutkitaan tärinän vaikutuksia? Terveyden parantaminen? Tiedetäänkö me todella se? Epämukavuuden vähentäminen ja matkustumukavuuden lisääminen
  • #4: Tähän ihminen ja osoitukset siitä mihin terveys vaikuttaa ja mihin epämukavuus vaikuttaa Lisää vielä laatikot joissa vaikutuksista enemmän tietoa Terveysvaikutukset ovat pitkäikäisiä ja hankala selvittää Liittyvät käytännössä aina selkärankaan ja selkäkipuihin Epämukavuus on enemmän psykologista ja palaute nopea Selkäranka ei toivu koskaan tärinästä (ilmeisesti), mutta epämukavuus loppuu vähän ajan kuluttua Epämukavuudella ja terveysvaikutuksilla on yhteys (vähemmän tärinää), mutta ei aina välttämättä suoraan vaikuta toisiinsa
  • #5: Mitä me tiedetään epämukavuudesta - Epämukavuudesta tiedetään myös jonkin verran ja siitä on tutkimustuloksia varsinkin 1970 luvulta Kerro myös että paljon tutkimustuloksia tehty epämukavuudesta, jotka käyttävät standardia, mutta itse standardia on vähemmän validoitu
  • #6: Mitä me tiedetään epämukavuudesta - Epämukavuudesta tiedetään myös jonkin verran ja siitä on tutkimustuloksia varsinkin 1970 luvulta Kerro myös että paljon tutkimustuloksia tehty epämukavuudesta, jotka käyttävät standardia, mutta itse standardia on vähemmän validoitu
  • #7: There were three questions that needed to be answered: Is the standard method valid – not enough information found What is the best approach on using the method – too many options If it is valid and this is the best way of using it – how well does it correlate to discomfort and work in different environments