Application of ISO 2631-1 (1997) for evaluating discomfort from whole-body vibration: verification using field and laborat...
The goal of the research <ul><li>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  relation...
Current knowledge
Current knowledge <ul><li>Little information on effect of time </li></ul><ul><li>Little information on the variability of ...
Evaluation of ISO 2631-1 <ul><li>Is the standard method valid? </li></ul><ul><li>What is best approach of using it? </li><...
Which axes dominate in field
Validating the standard method <ul><li>Seat translational axes are enough for prediction </li></ul><ul><li>Frequency weigh...
Improving the standard method
Simplifying the guidance on using the method <ul><li>Measure three translational axes from the seat </li></ul><ul><li>Use ...
Concluding the necessary changes and research for improving the method <ul><li>Getting rid of the options for using the ad...
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Improving ISO 2631-1 for evaluating discomfort from vibration

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Improving ISO 2631-1 for evaluating discomfort from vibration

  1. 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. 2. The goal of the research <ul><li>Provide a practical method for engineers to minimize the negative effects of vibration </li></ul>
  3. 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
  4. 4. Current knowledge
  5. 5. Current knowledge <ul><li>Little information on effect of time </li></ul><ul><li>Little information on the variability of sex and size of a person </li></ul><ul><li>Few studies on combining the axes </li></ul><ul><li>Few studies on determining best averaging method </li></ul><ul><li>One study of using all 12 axes in field </li></ul><ul><li>One study to determine correlation in field </li></ul>
  6. 6. Evaluation of ISO 2631-1 <ul><li>Is the standard method valid? </li></ul><ul><li>What is best approach of using it? </li></ul><ul><li>How well does it predict discomfort? </li></ul>
  7. 7. Which axes dominate in field
  8. 8. Validating the standard method <ul><li>Seat translational axes are enough for prediction </li></ul><ul><li>Frequency weighting works </li></ul><ul><li>R.m.s. is better than r.m.q. </li></ul><ul><li>Multiplying factors do not work well </li></ul>
  9. 9. Improving the standard method
  10. 10. Simplifying the guidance on using the method <ul><li>Measure three translational axes from the seat </li></ul><ul><li>Use the r.m.s. method to average them </li></ul><ul><li>Combine to a single value using 1.4 multiplying factors </li></ul><ul><li>Compare two or more setups in same environment </li></ul>
  11. 11. Concluding the necessary changes and research for improving the method <ul><li>Getting rid of the options for using the additional axes </li></ul><ul><li>Providing guidance on how to interpret the results </li></ul><ul><li>Providing a method to optimize multiplying factors for different environments </li></ul>

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