| 摘要 |
<p>The present invention aims to provide a method of designing a resonator more simply by deriving a non-transcendental model formula, and to provide a pneumatic tire having the resonator designed by this method. A method of designing a resonator 1 of a pneumatic tire having a circumferential groove 5 on a tread 4 and the resonator 10 configured to reduce a noise generated by resonance in tubular spaces defined by the circumferential groove 5 and a road surface, the resonator 1 having a branch groove 2 branched from the circumferential groove 5 and an air chamber 3 communicating with the branch groove 2 and having a cross section perpendicular to its extending direction greater than that of the branch groove 2, wherein a portion l 1 of a minimum cross section S min of the branch groove from an opening to the circumferential groove satisfies l 1 /L<1/À and l 2 /L<(l-l 1 )/L<1/À, where 1 is a length of an axis o-o' of the branch groove 2, L is a length of the circumferential groove within a contact patch, S min is a minimum portion of the cross section of the branch groove, and S max is a maximum portion of the cross section of the air chamber, and a relation between 1/L and S min /S max to determine a shape of the resonator satisfies the following equations: S min S max = À 2 2 �¢ 0.75 2 �¢ l L 2 and S min S max = À 2 2 �¢ 1.25 2 l L 2 - 2 À 2 In addition, the pneumatic tire having the resonator designed by the method is provided.</p> |
