Prediction of Impact Shock Vibrations at Tennis Players Wrist Joint: Comparison between Conventional Weight Racket and Light Weight Racket with Super Large Head Size
スポンサーリンク
概要
- 論文の詳細を見る
The lightweight racket with handle-light configuration and large head size is recent tendency of high-tech tennis rackets, increasing power or post-impact ball velocity with an increasing racket swing speed. This paper investigated the performance of lightweight tennis racket with super-large head size in terms of feel or comfort. It predicted the effect of the mass and mass distribution of super-large sized rackets on the impact shock vibrations of the racket handle and the players wrist joint when a player hits a flat forehand drive. The prediction is based on the identification of the racket characteristics, the damping of the racket-arm system, equivalent mass of the players arm system and the approximate nonlinear impact analysis in tennis. A super-light weight balanced racket (mass: 292 g, the center of gravity LG: 363 mm from the butt end) and a conventional weight and weight balanced racket (349 g, LG: 323 mm) are selected as representatives. They are the super-large sized rackets made of carbon graphite with a head size of 120 square inches and the same geometry. The result showed that the shock vibration of the super-light weight balanced racket with super-large sized head is much larger than that of the conventional weight balanced type racket. It also showed that the sweet area of the former in terms of the shock vibration shifts from the center to the topside on the racket face compared to the latter. This is because the location of the grip on the racket handle is further from the location of the node on the handle of the first mode of super-light racket than that of the conventional weight racket.
著者
-
Kawazoe Yoshihiko
Department Of Mechanical Engineering Saitama Institute Of Technology
-
NAKAGAWA Masamichi
Department of Human-Robotics, Saitama Institute of Technology
-
TAKEDA Yukihiro
Graduate School of Engineering, Saitama Institute of Technology
-
CASOLO Federico
Politecnico di Milano
-
TOMOSUE Ryoso
Yasuda Women's College
-
YOSHINARI Keiko
Shirayuri College
-
KAWAZOE Yoshihiko
Department of Human-Robotics, Saitama Institute of Technology
-
TOMOSUE Ryoso
Yasuda Women's College
関連論文
- Prediction of Impact Shock Vibrations at Tennis Players Wrist Joint: Comparison between Conventional Weight Racket and Light Weight Racket with Super Large Head Size
- The Onset of Cavitation and the Acoustic Noise Characteristics of Sodium Flow in a Venturi
- INVESTIGATION OF A ZIGZAG RISING BUBBLE USING A SPINNING SPHERE MODEL(Multiphase Flow)
- Stability of a Magnetically Levitated Diamagnetic Fluid Column
- Study on the Horizontal Oscillation of Magnetically Levitated Liquid Column
- Chaos-Entropy Analysis and Acquisition of Individuality and Proficiency of a Human Operators Skill Using a Fuzzy Controller
- Chaos-Entropy Analysis and Acquisition of Human Operators Skill Using a Fuzzy Controller: Identification of Individuality during Stabilizing Control of an Inverted Pendulum
- SEPARATION AND WAKE CONTROLS OF A BACK-SPINNING SPHERE BY DIMPLES(Separation and Reattachment)
- Axial oscillation of a magnetically levitated non-magnetic fluid column inside a straight magnetic pipe
- ACQUSITION OF HUMAN OPERATOR'S SKILL FROM TIME SERIES DATA USING FUZZY INFERENCE : IDENTIFICATION OF INDIVIDUALITY DURING STABILIZING CONTROL OF AN INVERTED PENDULUM
- Chaos-Entropy Analysis and Acquisition of Individuality and Proficiency of Human Operators Skill Using a Neural Controller
- Performance Prediction of Active Piezo Fiber Rackets in Terms of Tennis Power
- Low-Speed Hunting of the Pneumatically Governed Compression Ignition Engine : Effects of Various Parameters on the Amplitude and Frequency of Limit Cycle
- Low Speed Hunting of Pneumatically Governed Compression-Ignition Engine : 2nd Report, Stability Criticism of the Closed Engine-Governor Loop Based on Measured Frequency Responses of the Two Open Systems Composing the Loop
- Low Speed Hunting of the Pneumatically Governed Compression-Ignition Engine : 1st Report, Various Experiments for Identifying the Causes
- Analysis of Impact Phenomena in a Tennis Ball-Racket System : Effects of Frame Vibrations and Optimum Rocket Design
- Physics of the Tennis Racket: The Coefficient of Restitution
- Effect of Notched Strings on Tennis Racket Spin Performance: Ultrahigh-Speed Video Analysis of Spin Rate, Contact Time, and Post-Impact Ball Velocity
- Mechanism of Tennis Racket Spin Performance
- Low Speed Hunting of Pneumatically Governed Compression-ignition Engine : 3rd Report, Computer Simulation of the Low Speed Hunting
- Low Speed Hunting of the Pneumatically Governed Compression-ignition Engine : 4th Report, Effect of Simulated Venturi Diameter on Phase Lag of the Fuel Control Rack Response