压电分析中公式R = 0.9/(Ω3)(Co)是怎么推导的?
ansys help 里 7.6. Sample Piezoelectric-Circuit Analysis (Batch or Command Method) 节中R = 0.9/(Ω3)(Co) 的公式是怎么推导的??To more accurately represent the piezoelectric transducer, include more capacitor-inductor branches in the reduced order model. For example, use nine capacitor-inductor branches as shown in Figure 7.16: "Equivalent Circuit - Harmonic Analysis Near the 3rd Piezoelectric Resonance". The nine Ci-Li (i = 1, 2, ... 9) branches correspond to the first nine resonance modes of the piezoelectric transducer. The equivalent static capacitance and resistance are adjusted to:
Co = Cs - SUM of Ci (i = 1 through 9)
"""""""""""""""""""""R = 0.9/(Ω3)(Co)"""""""""""""""""""
where:
Ω3 = Angular frequency of the third resonance mode
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