Abstract: A method is disclosed for analyzing the rolling of a rotating body that will make it possible to simultaneously achieve reduction in computational cost and attainment of adequate analytic precision. The method includes: a step (S100, S101) in which a structural model is acquired; a step (S103) in, which a region Ar1 on a rotating body T at which finely divided computational mesh cells are established is made to come in contact with the ground, and rolling analysis processing is performed in which rolling is made to occur in an amount that is an angle corresponding to N minimum units (where N is a natural number not less than 1); and a step (S105) in which mapping processing is performed in which physical quantities at computational mesh cells as they exist following the rolling analysis processing are copied to corresponding computational mesh cells at a rolling start time.

Abstract: A method for analyzing fluid around a rotating body includes: a step (S100) in which a spatial model having a rotating computational mesh cell group A and a stationary computational mesh cell group B is acquired; a step (S101) in which a storage computational mesh cell group C is established; a step (S102) in which arithmetic operations for fluid analysis are performed; a step (S103) in which the physical quantity at the computational mesh cell making up the rotating computational mesh cell group A calculated as a result of arithmetic operations for fluid analysis is copied to a corresponding computational mesh cell at the storage computational mesh cell group C; and a step (S104) in which averages over time are calculated for the physical quantities at the storage computational mesh cell group C and the stationary computational mesh cell group B.

Abstract: A forming device for a green tire includes a supply unit that supplies a strip-shaped ply sheet for forming a discontinuous carcass ply, a dividing portion that divides, in front in a feed direction of the ply sheet, the ply sheet supplied from the supply unit into two in a direction orthogonal to the feed direction, a guide portion that guides the ply piece sheets divided into two by the dividing portion so that the ply sheets are separated from each other in a direction orthogonal to the feed direction, a cutting portion that cuts the ply piece sheets divided into two by the dividing portion in the feed direction to separate the pair of ply pieces from the ply sheet, and a forming drum that winds up the pair of ply pieces.

Abstract: A pneumatic tire includes a carcass ply stretching between a pair of bead cores disposed on both sides in the tire width direction, and the carcass ply includes a pair of ply pieces disposed separately on both sides in the tire width direction. Each of a pair of the ply pieces has a joint portion in which both end portions in the tire circumferential direction are joined in a manner overlapping each other, and the respective joint portions of a pair of the ply pieces are provided at different positions in the tire circumferential direction.

Abstract: A pneumatic tire in an embodiment is provided with a shoulder land that is a land including a ground contact end. In the pneumatic tire, a circumferential groove which extends in a tire circumferential direction and both ends of which are closed is provided intermittently in the tire circumferential direction in the shoulder land. When a ground contact width of the shoulder land is set as A, the circumferential groove is provided within a range of A/2 on each side in a tire width direction from the ground contact end.

Abstract: A pneumatic tire includes a projection formed on a surface of a tire tread portion. A thickness of the projection, which is a distance from the surface of the tread portion to a top surface of the projection, is smaller than a width of the projection, which is a size of the top surface in a tire circumferential direction. The width of the projection is equal to or more than 10 mm.

Abstract: A method for analyzing fluid around a rotating body includes: a step (S100) in which a spatial model having a rotating computational mesh cell group A and a stationary computational mesh cell group B is acquired; a step (S101) in which a storage computational mesh cell group C is established; a step (S102) in which arithmetic operations for fluid analysis are performed; a step (S103) in which the physical quantity at the computational mesh cell making up the rotating computational mesh cell group A calculated as a result of arithmetic operations for fluid analysis is copied to a corresponding computational mesh cell at the storage computational mesh cell group C; and a step (S104) in which averages over time are calculated for the physical quantities at the storage computational mesh cell group C and the stationary computational mesh cell group B.

Abstract: A method is disclosed for analyzing the rolling of a rotating body that will make it possible to simultaneously achieve reduction in computational cost and attainment of adequate analytic precision. The method includes: a step (S100, S101) in which a structural model is acquired; a step (S103) in, which a region Ar1 on a rotating body T at which finely divided computational mesh cells are established is made to come in contact with the ground, and rolling analysis processing is performed in which rolling is made to occur in an amount that is an angle corresponding to N minimum units (where N is a natural number not less than 1); and a step (S105) in which mapping processing is performed in which physical quantities at computational mesh cells as they exist following the rolling analysis processing are copied to corresponding computational mesh cells at a rolling start time.

Abstract: A method includes a step in which time series data pertaining to displacements of node groups including all nodes that constitute an exterior surface of a tire including grooves thereon, and at least a portion of all nodes that constitute groove space elements, is acquired from results of arithmetic operations for deformation in accordance with the model being such that having the groove space elements; and a step in which a fluid analytic model in which space around the tire is expressed as a plurality of computational mesh cells is used to perform arithmetic operations for fluid analysis in which arithmetic operations are carried out with respect to a physical quantity of fluid for each of the computational mesh cells as locations of the computational mesh cells are varied in such fashion that the node groups in the time series data are made to serve as control points.

Abstract: A pneumatic tire includes a projection formed on a surface of a tire side portion. The projection includes a top surface, and first and second side surfaces respectively forming a side surface in a tire circumferential direction. A first side edge portion, where the top and first side surfaces intersect, has an inclination to a tire radial direction viewed in a tire width direction. A second side edge portion, where the top and second side surfaces intersect, has an inclination to the tire radial direction as viewed in the tire width direction. A first tip end angle made by the top surface and the first side surface on the first side edge portion, and a second tip end angle made by the top surface and the second side surface on the second side edge portion are 100° or less. The rotational direction of the pneumatic tire is not designated.

Abstract: Durability of a pneumatic tire is enhanced by effectively promoting heat radiation by air cooling. A plural of projections are comprised on a surface of a tire side portion. The projection comprises a front side surface which is a side surface of a tire rotational direction side and an outer end surface which is a side surface of a tire outer radial direction side. The front edge portion intersects a straight line extending in a tire radial direction as viewed in a tire wide direction. A tip angle made by the top surface and the front side surface on the edge portion of the projection is equal to or less than 100°. The outer end surface comprises a projection having an inclination side surface which is inclined in a tire rotating rivers direction toward a tire outer radial direction.

Abstract: A pneumatic tire includes a plurality of projections formed on a surface of a tire side portion at an interval in a tire circumferential direction. A thickness of the projection is smaller than a width of a top surface of the projection in a tire circumferential direction. The thickness is a distance from the surface of the tire side portion to the top surface of the projection. The width of the projection is 10 mm or more. The interval of the projections is 3 times or more and 10 times or less as large as the thickness of the projection.

Abstract: A pneumatic tire includes a projection formed on a surface of a tire tread portion. A thickness of the projection, which is a distance from the surface of the tread portion to a top surface of the projection, is smaller than a width of the projection, which is a size of the top surface in a tire circumferential direction. The width of the projection is equal to or more than 10 mm.

Abstract: Durability of a pneumatic tire is enhanced by effectively promoting heat radiation by air cooling. A plural of projections are comprised on a surface of a tire side portion. The projection comprises a front side surface which is a side surface of a tire rotational direction side and an outer end surface which is a side surface of a tire outer radial direction side. The front edge portion intersects a straight line extending in a tire radial direction as viewed in a tire wide direction. A tip angle made by the top surface and the front side surface on the edge portion of the projection is equal to or less than 100°. The outer end surface comprises a projection having an inclination side surface which is inclined in a tire rotating rivers direction toward a tire outer radial direction.

Abstract: A pneumatic tire includes a projection formed on a surface of a tire side portion. The projection includes a top surface, and first and second side surfaces respectively forming a side surface in a tire circumferential direction. A first side edge portion, where the top and first side surfaces intersect, has an inclination to a tire radial direction viewed in a tire width direction. A second side edge portion, where the top and second side surfaces intersect, has an inclination to the tire radial direction as viewed in the tire width direction. A first tip end angle made by the top surface and the first side surface on the first side edge portion, and a second tip end angle made by the top surface and the second side surface on the second side edge portion are 100° or less. The rotational direction of the pneumatic tire is not designated.

Abstract: A pneumatic tire includes a plurality of projections formed on a surface of a tire side portion at an interval in a tire circumferential direction. A thickness of the projection is smaller than a width of a top surface of the projection in a tire circumferential direction. The thickness is a distance from the surface of the tire side portion to the top surface of the projection. The width of the projection is 10 mm or more. The interval of the projections is 3 times or more and 10 times or less as large as the thickness of the projection.

Abstract: A pneumatic tire includes a projection formed on a surface of a tire side portion. The projection includes a top surface, a front side surface which is a side surface of the projection on a front side in a tire circumferential direction, and a front side edge portion formed by interconnection of the top surface and the front side surface. The front side edge portion is inclined with respect to a straight line passing the front side edge portion when viewed from a tire width direction. A tip end angle which is an angle formed by the top surface and the front side surface at the front side edge portion is equal to or smaller than 100°.