ANSYS varification manual 9

# 0775m and is the magnetic diffusivity 31822 m2sec

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Unformatted text preview: . Since the field is symmetric around the circumference, only a 5° slice is chosen for modeling. The external air is modeled to a boundary at r1= 0.75 in, where the infinite boundary element is placed. Six elements are arbitrarily modeled through the conductor thickness, line segment divisions and spacing ratios for the inner and outer air regions are chosen to provide compatible element sizes with the steel elements. The solution procedure consists of ramping the boundary conditions over 5 iterations in the first load step and iterating to convergence in a second load step with a convergence criterion of 1 x 10. The MKS system of units is used for the analysis. The conversion factor used in the KPSCALE command, from inches to meters is 0.0254. The current density is calculated as J = I/A = I/π(ro2 - ri2) = 2.28019 x 10-4 A/in2 = 438559 A/m2. Results Comparison Target ANSYS Ratio Bangle, T @ r r=.325 in 0.48 0.45 0.94 Bangle, T @ r=.375 in 1.03 1.02 0.99 Bangle, T @ r=.425 in 1.22 1.21 1.00 Figure 165.2 B-H Curve 1–366 ANS...
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