新材料乒乓球碰撞动力学分析

发布时间：2018-05-28 02:42

本文选题：乒乓球 + 新材料　；参考：《天津体育学院学报》2017年01期

【摘要】：绿色环保材质的醋酸纤维素乒乓球近年来备受关注。为研究新材料对乒乓球运动特性的影响,基于显式动力学理论并结合有限元方法,建立考虑旋转效应的乒乓球与球拍碰撞模型,研究新材料和赛璐珞2种材质对乒乓球与球拍碰撞后的速度、球与球拍接触时间及能量损失的影响。结果表明:乒乓球反射速度随入射角的增大而减小;球体直径相同、转速和入射速度相同条件下,新材料乒乓球与赛璐珞球相比,球速平均增大约2%。碰撞过程中球与球拍接触时间随乒乓球入射角的增大而增大,乒乓球材质的改变对球体与球拍接触时间影响较小;乒乓球入射角增大,能量损失率随之增加,同一直径、转速和入射速度条件下,新材料乒乓球能量损失率大于赛璐珞球,两者最大相差4.04%,平均能量损失率相差1.43%。研究一定程度上为运动员尽快适应新材料球带来的变化提供了理论参考。
[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.
【作者单位】：上海理工大学能源与动力工程学院;上海体育学院中国乒乓球学院;
【基金】：国家自然科学基金项目(项目编号:51676131);国家自然科学基金资助项目(项目编号:51176129) 上海市科委项目(项目编号:13DZ2260900)
【分类号】：G846

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