The strain characteristics of the elastic ring are an important factor affecting the fatigue proper-ties of the Elastic Ring Squeeze Film Damper(ERSFD).For the strain characteristics of the elastic ring,simula-tion analysis models of the elastic ring and the oil film were established using the finite element method and the fi-nite volume method.The dynamic response of the elastic ring strain was obtained through iterative solution using sub-domain coupled methods.An experimental platform for ERSFD strain characteristics was designed,and strain characteristic tests were conducted.The research results show that the time-domain signal of the elastic ring strain approaches zero at 1/2 period and exhibits a cyclic pulse signal similar to a half-wave sine wave.This indicates that during the steady-state precession process,the elastic ring away from the precession position is ei-ther separated from or loosely in contact with the shaft journal.The elastic ring is significantly affected by alternat-ing tensile stress,in which the maximum equivalent strain becomes 1.771×10-3 at the exit of the small hole inside the small hole close to the outer boss,which is most affected by tensile alternating stress.
Aero-engineElastic ring squeeze film damperFluid-solid couplingStrain characteris-ticsFinite element
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