골프 스윙 스피드에 따른 샤프트 강도 연구 = Optimizing Shaft Strength to improve Swing Performance in Golf

다국어 초록 (Multilingual Abstract)

ABSTRACT

Optimizing Shaft Strength to improve Swing Performance in Golf


Dea-Woon Lee

Department of Golf, The Graduate School
Hoseo University
Asan, Korea

(Supervised by professor Keon-Chun, Lee)

Playing golf can be improved by either professional lesson or custom-made golf clubs to develop swing motion. The five shotmaking factors on a game are distance, accuracy, trajectory, backspin and feeling. These factors can be affected by changing the specifications of the golf club on shot performance which are lie, loft, face angle, sole angle, shaft bend point, face progression/hosel offset, vertical roll, shaft flex, shaft torque, shaft weight, center of gravity, length, shaft balance point and set makeup.
The optimum shaft strength for swing speed was studied in analyzing the 3-D images of swing robot. The ball speed, vertical angle, flight time, landing angle and distance were measured to investigate the shaft strength of L(ladies=215), R(regular=235) and S(stiff=255), and were resulted in the followings:
1) In case of club speed 98mph, the ball speed of shaft S(stiff=255) is 147.17±2.67mph, that of shaft R(regular=235) is (145.46±3.05mph)and that of shaft L(ladies=215) is (143.81±2.97mph)
2) In case of club speed 98mph, the vertical angle of shaft R(Regular=235) is (16.90±1.57°), that of shaft L(ladies=215) is (14.84±1.18°) and that of shaft S(stiff=255) is (13.32±1.70°)
3) In case of club speed 98mph, the flight time of shaft S (stiff=255)is(6.38±0.03sec), that of shaft L(ladies=215)is (6.89±0.02sec) and that of shaft R(Regular=235) is (7.16±0.02sec)
4) In case of club speed 98mph, the landing angle of shaft S(stiff=255)is (37.63±0.46°), that of shaft L(ladies=215)is (46.85±0.33°) and that of shaft R(Regular=235) is ( 47.72±0.31°)
5) In case of club speed 98mph, the distance of shaft S(stiff=255) is (244.37±1.39m) and that of shaft R(Regular=235) is (223.56±1.16m) and that of shaft L(ladies=215) is (213.61±1.83m).

the optimum shaft strength must be applied to individual differences in body through club fitting and the research of golf swing is needed comparing with the results of 3-D swing robot.

목차 (Table of Contents)

• 목 차
• Ⅰ. 서론 1
• 1. 연구의 필요성 1
• 2. 연구목적 4
• 3. 연구의 가설 4
• 4. 연구의 제한점 5
• 5. 용어의 정의 5
• Ⅱ. 이론적 배경 6
• 1. 스윙동작의 원리 6
• 가. 어드레스 7
• 나. 백스윙 9
• 다. 다운스윙 10
• 라. 임팩트 11
• 2. 골프의 장비 13
• 가. 클럽 헤드 15
• 나. 샤프트 16
• 다. 샤프트의 선택 18
• 라. 그립(Grip) 20
• 3. 골프클럽 피팅 23
• 가. 무게 24
• 나. 길이 25
• 다. 토크 26
• 라. 진동수 27
• 마. 강도측정 28
• 바. 킥 포인트 28
• Ⅲ. 연구방법 29
• 1. 연구대상 29
• 2. 실험도구 29
• 가. 촬영장비 29
• 나. 스윙스피드 분석기 30
• 다. 실험 골프클럽 30
• 3. 실험절차 31
• 가. 사전검사 31
• 나. 본 실험 31
• 4. 자료분석 32
• Ⅳ. 결과 및 논의 34
• 1. 골프클럽의 샤프트 강도에 따른 볼 스피드 34
• 2. 골프클럽의 샤프트 강도에 따른 투사각 35 3. 골프클럽의 샤프트 강도에 볼의 비행시간 36
• 4. 골프클럽의 샤프트 강도에 볼이 떨어지는 각도 38
• 5. 골프클럽의 샤프트 강도에 볼의 비거리 39
• Ⅴ. 결론 및 제언 41
• 1. 결론 41
• 2. 제언 42 참고문헌 44
• 영문초록 47