On the scattering of test data and the significance of the standard coefficients 'dynamic stiffness' and 'loss angle' for hydraulic engine mounts

Based on the test results, a study on the scattering of the standard coefficients c(sub dyn) and (delta) within the test cycles on a standard testing machine as well as within the samples of a batch of hydraulic engine mounts is performed; furthermore, an estimate for the systematic error caused by the testing machine is given. By a simulated example, the pronounced sensitivity of the response of the engine to the scattering of c(sub dyn) and (delta) as well as to even small deviations of the hysteresis curves for otherwise identical values of the standard coefficients is demonstrated. As a main result, it is found that the most important source of uncertainty is scattering within the batch, which, in conjunction with the observed sensitivity of the response of the engine, raises the question for the meaningful level of sophistication of a model for predictive purposes.

  • Availability:
  • Authors:
    • MITSCH, M
    • MACK, W
    • FALKNER, A
  • Publication Date: 2010-3


  • English

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  • Accession Number: 01155252
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Apr 23 2010 10:59AM