在此基础上，得出了振子空载时共振频率方程和振子共振频率的表达式。
Based on the equivalent circuit, the resonance frequency equation is derived and the expression of the resonance frequency is obtained.
另外还设计了一种非对称的多频纵振动换能器，其共振频率方程为：这种类型的多频纵振动换能器可以应用到超声清洗中。
Finally, an asymmetrical multi-frequency transducer is designed, the resonant frequency of transducer is obtained, that is, This type of transducer can be used in ultrasonic cleaning and other fields.
推导了燃气振荡流方程，计算了对应不同燃烧室形状下燃气振荡流的共振频率。
The oscillation fluid equations are established and the resonance frequency of the oscillation fluid is calculated with different combustion chamber shapes.
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