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Governing Equation  F=mx+cx+kx  in the frequency domain F= x+2 ζω nx+ ω n2x  where ω n =km and ζ = c/2 √k/m Source: blinkdagger Blog.

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Presentation on theme: "Governing Equation  F=mx+cx+kx  in the frequency domain F= x+2 ζω nx+ ω n2x  where ω n =km and ζ = c/2 √k/m Source: blinkdagger Blog."— Presentation transcript:

1 Governing Equation  F=mx+cx+kx  in the frequency domain F= x+2 ζω nx+ ω n2x  where ω n =km and ζ = c/2 √k/m Source: blinkdagger Blog

2 Magnetic Field Strength TheoreticalWith Experimental Values

3 Eddy Current TheoreticalWith Experimental Values

4 Induced Damping Force TheoreticalWith Experimental Values

5 Modeling Roadblocks  Error occurred when trying to solve. Cause found due to “0” value input for electric conductivity of air surrounding model. Fixed by changing to extremely small value (1E-7 S/m)  Opposing force unable to calculate. Fixed by downloading COMSOL update.  Eddy current saturation. This was found only to occur at larger velocities, which should not be seen in the damper’s environment.

6 Results Magnetic Field Strength (T) Damping Force (lbf) Mass of Payload, m (kg) Spring Constant, k (lbf/in) Damping Coefficient, c (lbf-s/in) Zeta (%) Theoretical1.481.8121020.873.62413.83 Experimental0.88670.65281.1982.871.3067.25

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