Method for calculating volume change of tire transverse groove, method for generating tire pumping sound source data, acoustic analysis method, apparatus for executing these methods, computer program

摘要

PROBLEM TO BE SOLVED: To provide a method of calculating a volumetric change of a tire transverse groove accurately even in a case where a groove shape is complicated or in a case where a groove deforms in a complicated manner, and a method of generating pumping audio source data of a tire.SOLUTION: A method includes: a step of storing in a storage part 10 a tire finite element model M2 including a groove space element 22 arranged in a groove space enclosed by a groove wall forming a lateral groove 21, a Young's modulus of the groove space element 22 being set in a range from 1/1000 or more to 1/10000 or less of a Young's modulus set to an element forming a ground plane, a Poisson ratio of the groove space element 22 being set to 0 ± 0.01 (S100); a step of making the tire finite element model M2 stored in the storage part 10 perform a rolling motion to calculate deformation of a groove wall of the lateral groove 21 and the groove space element 22 caused by contact with a road surface by an arithmetic operation (S101); and a step of calculating a volumetric change of the groove space element 22 as volumetric change data of one piece of lateral groove 21 in one compartment comparted by the main groove 20 (S102).SELECTED DRAWING: Figure 2