Winding self-resonance

Lumped inductors in series connection are usually described by the n model as shown in Figure 9.59. The shunt capacitors depict the parasitic capacitances of coil windings to ground. Capacitive coupling between windings cause the self-resonance frequency /, as shown in Equation 9.38. Because of increasing effective inductance values in the vicinity of a parallel resonance, the inductors can only be used far below the self-resonance frequency (Figure 9.60). 

The vortex-induced oscillation contributes mainly to the lower frequency range of the spectrum. This phenomenon becomes more notable as the wind speed increases since the vortex shedding frequency is proportional to the wind speed and it will be closer to the fundamental frequency of the East Asian Hall. However, self-excited motion is not expected since the vortex-shedding oscillation frequency is far from the resonant frequencies of the building [203]. 

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