硬式野球バットの慣性特性 ―金属製新基準モデルおよび従来モデル，木製バットとの比較―

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タイトル別名
  • Inertial Properties of Baseball Bats ―Comparison among new regulation metal bats, current regulation metal bats, and wood bats―
  • コウシキ ヤキュウ バット ノ カンセイ トクセイ : キンゾクセイ シンキジュン モデル オヨビ ジュウライ モデル モクセイ バット トノ ヒカク

抄録

The purpose of this study is to examine inertial properties in baseball metal bats and wood bats. Mass, center of mass, and moment of inertia for rotation about the grip end of the bat (Igrip) were measured for 13 new regulation metal bats, 15 current regulation metal bats, and 7 wood bats. Igrip was determined by using the pendulum method. Although the average mass of wood bats was significantly smaller than mass of metal bats, the average value of Igrip of wood bats was significantly larger than that of metal bats. This result can be explained by the center of mass in wood bats which was located further than that of metal bats. Meanwhile, no significant difference in inertial properties between the two kinds of metal bats was found.

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