A New Designed Baseball Bat Based on Sweet Spots
This paper describes model testing of a wooden baseball bat with the purpose of finding the peak frequencies and vibration modes and their relation to the so-called “sweet spot”, including the position of the “sweet spot”, the effect of corking a bat and the comparison between wood and metal bats. Present an approach to determining the location of “sweet spot”, which can be classified into three categories: (1) Batter feels the least vibrational sensation. (2) The batted ball is at maximum speed. (3) Maximum energy is transferred to the ball. To analysis the vibration sensation, rotational dynamics model is set. The impulse received by hands varies with different impact positions and form a curve. Through the curve, the “sweet spot” that with least vibrational sensation is found. For maximum batted ball speed, velocity model is set on the basis of the conservation of momentum, regarding the bat as a rigid body. Finally, the curve of batted ball speed of different material and impact position is obtained and the impact point with maximum speed is found. Vibrations involving beam elements model is developed to analysis the maximum energy being transferred. By using beam theory, the “sweet spot” is located. Furthermore, through the three kinds of “sweet spot” this paper designs a new baseball bat that different “sweet spots” gather in a “sweet zone”.
Keywords:Sweet spot Baseball New baseball
- 2.Bruel K (2009) Structural testing: part 2–modal analysis and simulation, vol 21. Denmark, pp 4–48Google Scholar
- 3.Greenwald RM, Penna LH, Crisco JJ (2001) Differences in batted ball speed with wood and aluminum baseball bats: a batting cage study. J Appl Biomech 17:241–252Google Scholar
- 4.Fleisig GS, Zheng N, Stodden DF, Andrews Article JR (2002) Relationship between bat mass properties and bat velocity. Compos Struct 23:481–488Google Scholar
- 5.Shenoy MM, Smith LV, Axtell JT (2001) Performance assessment of wood, metal and composite baseball bats. Compos Struct 52 397–404Google Scholar