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Magnetostrictive effect on oscillating spring
Posted Dec 16, 2020, 6:19 p.m. EST Low-Frequency Electromagnetics, Piezoelectric Devices, Structural & Acoustics Version 5.5 0 Replies
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Hi! Im doing a project where im trying to investigate the magnetic effects on the oscillation of a balance spring. A balance spring is a small hair spring that sits inside mechanical watches. They usually oscillate with a frequency around 4hz and any fluxuation in that oscillation will disrupt the timekeping capabilities of the watch.
The model that im making is in 3D Currently i've applied a moment such that the spring oscillates. By just doing a stationary study its evident that the magnetic (B-field) that i've applied has an effect on the stresses and strains of the spring. What i now want to investigate is how much it disrupts the frequency of the watch.
I've tried doing an eigenfrequency study but the as soon as i activate both the magnetic field and the structural mechanics in the solver it wont solve. If i deactivate the magnetic field i will get a solution as can be seen in the GIF.
My question is: Is there any other way that i can investigate the effect on the oscillation by the magnetic field? Can i somehow plot the spring stiffness as a function of magnetic field?
Thanks in advance, Best regards, /Gustav
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Hello Gustav Thessén
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