Method of analyzing physical property of golf ball and method of manufacturing golf ball

• US 6,556,944 B2
• Filed: 07/26/2001
• Issued: 04/29/2003
• Est. Priority Date: 08/10/2000
• Status: Active Grant

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: Sumitomo Rubber Industries Limited
• Inventors: Miyamoto, Kazuyoshi
• Primary Examiner(s): Barlow, John
• Assistant Examiner(s): Lau, Tung S
• Application Number:
  US09/912,375
• Publication Number:
  US 20020023508A1
• Time in Patent Office: 642 Days
• Field of Search: 702/155, 702/150, 702/50, 702/97, 345/420, 345/423, 364/578, 703/212, 473/330, 473/199, 473/318, 473/321, 228/157
• US Class Current: 702/155
• CPC Class Codes: A63B 37/0003 Golf balls
• CPC Class Codes: A63B 37/0011 Grooves or lines

Abstract

A ⅛ model is obtained at the steps of (A1) assuming a small cube, (A2) dividing the small cube into meshes, thereby obtaining a nodal point, (A3) projecting the nodal point included in each of three surfaces of the small cube which is not coincident with three planes of a ⅛ sphere onto a spherical surface of a small ⅛ sphere, thereby obtaining a new nodal point, (A4) dividing a space between the spherical surface of the small ⅛ sphere and that of the ⅛ sphere through spherical surfaces of a plurality of intermediate ⅛ spheres setting origins to be centers thereof, and (A5) sequentially repeating an operation for projecting a nodal point present on an inner spherical surface onto a spherical surface adjacent to an outside thereof from the small ⅛ sphere to the ⅛ sphere through the intermediate ⅛ spheres. The ⅛ model is expanded to obtain a finite element golf ball model.

Claims

1. A method of analyzing a physical property of a golf ball comprising the steps of:

(H) obtaining a finite element golf ball model including a large number of elements through mesh formation such that a ratio of hexahedron elements to all the elements is 95% or more; and

(I) analyzing the physical property of the golf ball through a finite element method using the finite element golf ball model obtained at the step (H).

3. A method of analyzing a physical property of a golf ball according claim 1, wherein the large number of elements is in a range of from 864 to 100,000.

2. A method of manufacturing a golf ball in which a specification of the golf ball is determined based on information obtained by a method of analyzing a physical property of the golf ball comprising the following steps and the golf ball is manufactured based on the specification, the analyzing method comprising the steps of:

(H) obtaining a finite element golf ball model including a large number of elements through mesh formation such that a ratio of hexahedron elements to all the elements is 95% or more; and

(I) analyzing the physical property of the golf ball through a finite element method using the finite element golf ball model obtained at the step (H).

4. A method of manufacturing a golf ball according to claim 2, wherein the large number of elements is in a range of from 864 to 100,000.