Golf club heads with ribs and related methods

1. A golf club head comprising:

a body comprising:

a heel end, a toe end, a crown, a sole, a front end, and a rear end; and

at least one of a skirt or a hosel;

and

a first rib protruding from a rib surface of the body;

wherein:

the first rib comprises:

first and second first-rib ends opposite each other; and

first, second, and third first-rib portions protruded from the rib surface of the body;

the first first-rib portion is located between the first first-rib end and the third first-rib portion;

the second first-rib portion is located between the second first-rib end and the third first-rib portion;

the first first-rib portion comprises a first first-rib thickness substantially parallel to the rib surface;

the second first-rib portion comprises a second first-rib thickness substantially parallel to the rib surface;

the third first-rib portion comprises a third first-rib thickness substantially parallel to the rib surface;

and

the first and second first-rib thicknesses are greater than the third first-rib thickness;

wherein the first first-rib portion is located either at the crown or the sole;

wherein the second first-rib portion is located either at the crown or the sole, but not in the same location as the first first-rib portion.

2. The golf club head of claim 1 , wherein:

the first first-rib portion further comprises a first first-rib height substantially orthogonal to the rib surface;

the second first-rib portion further comprises a second first-rib height substantially orthogonal to the rib surface;

the third first-rib portion further comprises a third first-rib height substantially orthogonal to the rib surface; and

the first and second first-rib heights are greater than the third first-rib height.

3. The golf club head of claim 1 , wherein:

a maximum first-rib height of the first rib, measured orthogonal to the rib surface, is up to approximately 6 mm.

4. The golf club head of claim 1 , wherein:

at least one of the first or second first-rib thickness is approximately 1.1 times to approximately 8 times greater than the third first-rib thickness.

5. The golf club head of claim 1 , wherein:

the first rib protrudes from the rib surface and extends continuously from the crown to the sole of the body.

6. The golf club head of claim 1 , wherein:

the skirt is located between the crown and the sole; and

the first rib protrudes from the rib surface along at least a portion of the skirt.

7. The golf club head of claim 1 , wherein:

the first rib comprises:

a first rib center section comprising 95% of a first rib length of the first rib and centered about a first rib centerpoint of the first rib length;

the first rib center section comprises:

the first first-rib thickness of the first first-rib portion;

the second first-rib thickness of the second first-rib portion; and

the third first-rib thickness of the third first-rib portion;

and

the third first-rib thickness protrudes from the rib surface between the first first-rib portion and the second first-rib portion.

8. The golf club head of claim 7 , wherein:

the third first-rib thickness is a minimum first-rib thickness of the first rib center section.

9. The golf club head of claim 1 , wherein:

the rib surface comprises a first high amplitude zone at a first one of the crown, the sole, or the skirt;

the third first-rib portion is located at the first high amplitude zone; and

the first and second first-rib portions are located outside the first high amplitude zone.

10. The golf club head of claim 9 , wherein:

the first high amplitude zone comprises a location at the first one of the crown, the sole, or the skirt where a maximum oscillation amplitude of the body exists upon a golf shot impact between a golf ball and a strikeface of the front end of the body.

11. The golf club head of claim 10 , wherein:

the first high-amplitude zone, for the location of the third first-rib portion, is defined with respect to where the maximum oscillation amplitude is approximately 0.5 mm to approximately 4 mm, at a frequency of approximately 1000 Hz to approximately 5000 Hz, from the golf shot impact at an impact speed of approximately 25 m/s to approximately 75 m/s.

12. The golf club head of claim 1 , wherein:

the first rib comprises a fourth first-rib portion located between the second first-rib end and the second first-rib portion;

the fourth first-rib portion comprises a fourth first-rib thickness substantially parallel to the rib surface;

and

the second first-rib thickness is greater than the fourth first-rib thickness.

13. The golf club head of claim 12 , wherein:

the rib surface comprises:

a first high amplitude zone of the first one of the crown, the sole, or the skirt; and

a second high amplitude zone of a second one of the crown, the sole, or the skirt;

the third first-rib portion is located at the first high amplitude zone;

the first and second first-rib portions are located outside the first high amplitude zone;

the fourth first-rib portion is located at the second high amplitude zone; and

the second first-rib portion is located outside the second high amplitude zone.

14. The golf club head of claim 12 , wherein:

the first rib comprises a fifth first-rib portion located between the second first-rib end and the fourth first-rib portion;

the fifth first-rib portion comprises a fifth first-rib thickness substantially parallel to the rib surface;

and

the fifth first-rib thickness is greater than the fourth first-rib thickness.

15. A method comprising:

providing a body of a golf club head, the body comprising:

a heel end, a toe end, a crown, a sole, a front end, and a rear end; and

at least one of a skirt or a hosel;

and

providing a first rib protruding from a rib surface of the body;

wherein:

the first rib comprises:

first and second first-rib ends opposite each other; and

first, second, and third first-rib portions protruded from the rib surface of the body;

the first first-rib portion is located between the first first-rib end and the third first-rib portion;

the second first-rib portion is located between the second first-rib end and the third first-rib portion;

the first first-rib portion comprises a first first-rib dimension comprising one of:

a first first-rib height substantially orthogonal to the rib surface; or

a first first-rib thickness substantially orthogonal to the first first-rib height;

the second first-rib portion comprises a second first-rib dimension comprising:

a second first-rib height substantially orthogonal to the rib surface when the first first-rib dimension comprises the first first-rib height; or

a second first-rib thickness substantially orthogonal to the second first-rib height when the first first-rib dimension comprises the first first-rib thickness;

the third first-rib portion comprises a third first-rib dimension comprising:

a third first-rib height substantially orthogonal to the rib surface when the first first-rib dimension comprises the first first-rib height; or

a third first-rib thickness substantially orthogonal to the third first-rib height when the first first-rib dimension comprises the first first-rib thickness;

and

the first and second first-rib thicknesses are greater than the third first-rib thickness;

wherein the first first-rib portion is located either at the crown or the sole:

wherein the second first-rib portion is located either at the crown or the sole, but not in the same location as the first first-rib portion.

16. The method of claim 15 , wherein:

providing the first rib comprises:

determining, from an FEA map of the body, a location of a maximum amplitude zone at a first one of the crown, the sole, or the skirt;

locating the third first-rib dimension at the maximum amplitude zone; and

locating the first and second first-rib dimensions located outside the maximum amplitude zone.