METHOD FOR DESIGNING PNEUMATIC TIRE, METHOD FOR DESIGNING VULCANIZATION METAL MOLD FOR TIRE, METHOD OF MANUFACTURING VULCANIZATION METAL MOLD FOR TIRE, METHOD OF MANUFACTURING FOR PNEUMATIC TIRE, OPTIMIZATION ANALYTIC DEVICE, AND STORAGE MEDIUM STORED WITH OPTIMIZATION ANALYTIC PROGRAM OF TIRE

摘要

PROBLEM TO BE SOLVED: To more efficiently design and develop a tire while estimating actually using tire performances through a fluid such as drainability, snow performance, and noise performance. SOLUTION: A tire model and a fluid model are formed from a tire design plan, a road surface state is inputted by the selection of a friction coefficient together with the formation of a road surface model, and a boundary condition in rolling of tire or in non-rolling of tire is set to determine a design variable and a limitation condition (100-104). The design variable is changed by a unit quantity ri to determine a model (106-110). The tire model deformation calculation, fluid calculation and boundary condition for this model are determined to estimate the tire performance (112). The values of intended function and limitation condition and the sensitivity every design variable are arithmetically calculated, the predicted value of change quantity of the design valuable for maximizing the value of intended function is determined while predicting the tire performance and considering the limitation condition, and this procedure is repeated until the value of intended function is converged (114-124). The shape of the tire is determined on the basis of the design variable in the conversion of the value of the intended function to the estimated value.