The strong vibration and big noise of dry-type air-core reactor are always a prominent problem.It is of great significance to study the vibration characteristic of dry-type air-core reactor for its vibration and noise reduction.Starting from the generation process of reactor

a three-dimensional finite element simulation model of electromagnetic-mechanical reactor is established.The characteristic of magnetic induction intensity distribution and electromagnetic force variation of reactor is analyzed based on the field-circuit coupling principle.On the basis of dynamic theory

modal analysis and harmonic response analysis are carried out to study the variation law of inherent frequency and modal vibration shapes

acceleration response as well as vibration characteristics of reactor under different states.It is shown by the result that the main frequency of reactor vibration is 100 Hz

and the vibration of inner envelope is greater than that of outer envelope.Under different constraints

the vibration characteristic of reactor is different.The study results provide an effective basis and support for the vibration and noise reduction

insulation protection and structural stability of the reactor.