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Conference papers
Modeling of magnetic field perturbations on the balance-spring of a mechanical watch
Abstract : A magnetic field is a major enemy of a mechanical watch. This field may modify the structure of the balance-spring and change its resonance frequency. As a consequence, the watch loses its accuracy. The aim of this work is to quantify the impact of the magnetic field to the balance-spring resonance using a finite element approach. This coupled magneto-mechanical problem implies magnetic forces computation while accounting for a large rotation of the spring. An original algorithm including a dynamic mechanical time-stepping scheme is proposed to quantify the change of the resonance frequency. Index Terms-Mechanical watch, resonance frequency, coupled magneto-mechanic problem.
Cited literature [6 references]
https://hal-centralesupelec.archives-ouvertes.fr/hal-01235591
Contributor : Lionel Pichon <>
Submitted on : Tuesday, March 17, 2020 - 4:27:31 PM
Last modification on : Wednesday, September 16, 2020 - 5:49:21 PM
Long-term archiving on: : Thursday, June 18, 2020 - 2:55:04 PM
Contributor : Lionel Pichon <>
Submitted on : Tuesday, March 17, 2020 - 4:27:31 PM
Last modification on : Wednesday, September 16, 2020 - 5:49:21 PM
Long-term archiving on: : Thursday, June 18, 2020 - 2:55:04 PM
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CM2015_MechanicalWatch2.pdf
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