Recognition method for resonant frequency of electromagnetic drive type high-frequency fatigue testing machine

The invention belongs to the field of fatigue tests, and particularly relates to an electromagnetic drive type high-frequency fatigue testing machine resonance frequency identification method. Comprising the following steps: mounting a test piece on an electromagnetic driving type high-frequency fatigue testing machine, and applying a static load; estimating the inherent frequency according to the attribute value of the resonance part of the electromagnetic drive type high-frequency fatigue testing machine; pre-judging the sweep frequency range according to the inherent frequency pre-estimated value to obtain a pre-judged resonant frequency; setting a scanning frequency initial value according to the pre-judged resonance frequency, and inputting an excitation signal; a phase difference meter is adopted to monitor the phase difference between the resonance signal and the excitation signal, and the resonance frequency of the electromagnetic drive type high-frequency fatigue testing machine is identified accordi