發(fā)布時間：2018-05-28 02:42

  本文選題：乒乓球 + 新材料��； 參考：《天津體育學院學報》2017年01期

【摘要】：綠色環(huán)保材質(zhì)的醋酸纖維素乒乓球近年來備受關(guān)注。為研究新材料對乒乓球運動特性的影響,基于顯式動力學理論并結(jié)合有限元方法,建立考慮旋轉(zhuǎn)效應的乒乓球與球拍碰撞模型,研究新材料和賽璐珞2種材質(zhì)對乒乓球與球拍碰撞后的速度、球與球拍接觸時間及能量損失的影響。結(jié)果表明:乒乓球反射速度隨入射角的增大而減小;球體直徑相同、轉(zhuǎn)速和入射速度相同條件下,新材料乒乓球與賽璐珞球相比,球速平均增大約2%。碰撞過程中球與球拍接觸時間隨乒乓球入射角的增大而增大,乒乓球材質(zhì)的改變對球體與球拍接觸時間影響較小;乒乓球入射角增大,能量損失率隨之增加,同一直徑、轉(zhuǎn)速和入射速度條件下,新材料乒乓球能量損失率大于賽璐珞球,兩者最大相差4.04%,平均能量損失率相差1.43%。研究一定程度上為運動員盡快適應新材料球帶來的變化提供了理論參考。
[Abstract]:Environmental-friendly cellulose acetate table tennis has attracted much attention in recent years. In order to study the influence of new materials on table tennis movement characteristics, based on explicit dynamics theory and finite element method, a ping-pong and racket collision model considering rotation effect was established. The effects of new materials and celluloid materials on the velocity, contact time and energy loss of ping-pong and racket were studied. The results showed that the reflection velocity of table tennis decreased with the increase of incident angle, and the spherical velocity of table tennis was increased by about 2 parts compared with that of celluloid ball under the same spherical diameter and the same rotational speed and incident velocity. The contact time between the ball and the racquet increases with the increase of the incident angle of the ping-pong ball, and the change of the material of the ping-pong ball has little effect on the contact time between the ball and the racket, and the energy loss rate increases with the increase of the incident angle of the ping-pong ball and the same diameter. Under the condition of rotational speed and incident speed, the energy loss rate of new material table tennis is higher than that of celluloid ball, the maximum difference between them is 4.04 and the average energy loss rate is 1.43. To some extent, the research provides a theoretical reference for athletes to adapt to the changes brought by the new material ball as soon as possible.
【作者單位】： 上海理工大學能源與動力工程學院;上海體育學院中國乒乓球?qū)W院;
【基金】：國家自然科學基金項目(項目編號:51676131);國家自然科學基金資助項目(項目編號:51176129) 上海市科委項目(項目編號:13DZ2260900)
【分類號】：G846

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