Base strain effects on force measurements

P. Cappa, K. G. McConnell

Research output: Contribution to journalArticlepeer-review


Force transducers directly interact with their environment. In this study, a force transducer is attached to the midpoint of a free-free beam and is used to measure the force on a rigid mass that vibrates with the beam. The ratio of force to mass times acceleration is measured for several different masses over a frequency range that includes the first four odd natural frequencies of the beam. Then the force transducer is mounted so that the beam's strain is isolated from the transducer. The tests are repeated. The results dramatically illustrate the effects of base strain on the force measurements. A simple theoretical model is developed that explains the vertical axis shift in the calibration curve.

Original languageEnglish
Pages (from-to)284-289
Number of pages6
JournalExperimental Mechanics
Issue number3
Publication statusPublished - Sep 1996


  • Base strain
  • Dynamic calibration
  • Environmental effects
  • Force transducer

ASJC Scopus subject areas

  • Computational Mechanics
  • Mechanics of Materials


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