Centrifugal pendulum type perforated sound absorption tire and design method

The invention relates to a centrifugal pendulum type perforated sound absorption tire, which comprises: an elastic ring, the outer circumferential surface of which is connected to the inner tire surface of a tire body, and the inner circumferential surface of which is provided with an annular groove concentric with the elastic ring; the outer circumferential surface of the annular plate is connected with the inner circumferential surface of the elastic ring, and the annular groove is sealed to form a hollow cavity; a plurality of sound absorption through holes are formed in the circular ring plate; wherein the elastic ring is configured as follows: the elastic ring comprises a first part and a second part, and the rigidity of the first part is greater than that of the second part. By correspondingly setting the rigidity difference and rigidity distribution of the first part and the second part of the elastic ring, the frequency characteristic of the structure formed by the elastic ring and the circular ring p