Finite element model based rotating equipment supporting dynamic stiffness parameter measurement method

The invention relates to a finite element model based rotating equipment supporting dynamic stiffness parameter measurement method. The method comprises the following steps of: selecting two points p and q on two sides of a bearing rotor on a rotating equipment spindle along the axis direction; respectively mounting two electric vortex flow transducers on a cross section where the point p is arranged to ensure that the connecting lines of the two electric vortex flow transducers with the measurement point p form an angle of 90 degrees; arranging two electric vortex flow transducers of the point q in the same way, wherein signal output ends of the four electric vortex flow transducers are respectively connected with an industrial personal computer; establishing a rotor finite element model and working out an unbalanced force fu; deducing out supporting dynamic stiffness ZBF, and then carrying out serial calculation to obtain 8 parameters; and finally, establishing a standard according to calculated rotating equipment supporting dynamic stiffness parameters at different working rotating speeds so as to carry out safety evaluation on rotating equipment. The method has the advantages of high testing precision and simpleness and convenience for operation.