Patent ID: 6230112
Filing Date: 2001-05-08
Classification: B60C,Y10S,Y10T

Abstract:
A method for designing a pneumatic tire including:(1) selecting one shape from among:a shape of a block including an internal structure,a pattern shape of a portion of a tire crown including an internal structure, anda shape of a land portion which is continuous in a tire circumferential direction including an internal structure;(2) determining a basic shape model on the basis of the selected one shape;(3) determining an objective function representing a tire performance evaluation physical amount, said objective function being related to the basic shape model;(4) determining a design variable for determining the basic shape model;(5) determining a constraint condition for restricting at least one of:the shape of a block including an internal structure,the pattern shape of a portion of a tire crown including an internal structure,the shape of a land portion which is continuous in a tire circumferential direction including an internal structure,a tire cross-sectional shape, andthe tire performance evaluation physical amount;(6) varying the basic shape model by varying a value of said design variable for the basic shape model;(7) obtaining an optimal value of said design variable for the basic shape model, by which an optimal value of said objective function is obtained and which satisfies said constraint condition on the basis of a varied basic shape model and a varied value of said design variable for said basic shape model; and(8) designing the pneumatic tire on the basis of the optimal shape model.