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Model application research of javelin throwing problem based on computer simulations and gray prediction

机译：基于计算机仿真和灰色预测的标枪投掷问题模型应用研究

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This paper studies the javelin inclined projectile motion.According to the inclined projectilemotion principle, it is assumed that the initial velocity is 25m/s and throwing height is 1.8m. Under different throwing conditions, use computer to simulate of themovement trajectory of the javelin. Through comparative analysis, we obtained that the throwing range is different with different throwing angle.When the throwing angle is 45 degrees, the range reachesmaximumwith 68m. Finally, it uses graymodel to predict the future javelin achievements trend, which can more scientifically and effectively guide the training of javelin throwers, providing theoretical support for the multi-faceted scientific research in this field. The study shows: the greater the javelin release speed is, the greater the horizontal throwing distance of javelin becomes. In the process of training and competition, it is necessary to speed up the javelin throwers???? release speed through a variety of means; when there is no air resistance, the horizontal distance of the javelin throwing reaches themaximumusually in 45 degrees. Athletes have to go through a long-term training in order to achieve this effect. The horizontal distance of the javelin will also increase with the increase of the release height. Almost with each 1 millimeter rising, the horizontal distance has an increase of about 1 millimeter or so. In the javelin thrower selection, to choose tall athlete is also a necessary condition.
机译：本文研究了标枪的倾斜弹丸运动。根据倾斜弹丸运动原理，假设标枪的初始速度为25m / s，投掷高度为1.8m。在不同的投掷条件下，用计算机模拟标枪的运动轨迹。通过比较分析，得出不同投掷角度投掷范围有所不同，投掷角度为45度时最大投掷距离为68m。最后，使用灰色模型预测标枪的未来发展趋势，可以更科学有效地指导标枪运动员的训练，为该领域的多方面科学研究提供理论支持。研究表明：标枪释放速度越大，标枪的水平投掷距离就越大。在训练和比赛的过程中，有必要加快标枪运动员的速度吗？通过多种方式释放速度;没有空气阻力时，标枪投掷的水平距离最大为45度。运动员必须经过长期训练才能达到这一效果。标枪的水平距离也会随着释放高度的增加而增加。每增加1毫米，水平距离几乎增加1毫米左右。在标枪投掷者的选择中，选择高个子运动员也是必要条件。

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