| 唐艳霞,黄观新.啦啦操阿拉C杠难度动作的力学原理及其应用[J].计算力学学报,2024,41(4):801~806 |
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| 啦啦操阿拉C杠难度动作的力学原理及其应用 |
| Mechanics principle of Ala C Bar in cheerleading and its application |
| 投稿时间：2023-01-31 修订日期：2023-05-05 |
| DOI：10.7511/jslx20230131001 |
| 中文关键词: 啦啦操 阿拉C杠 力学原理 运动规划 动力学模型 |
| 英文关键词:cheerleading Ala C bar principle of mechanics exercise planning model of dynamics |
| 基金项目:广州市科技计划(202201010277);湖南省教育厅优秀青年项目(20B471)资助. |
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| 中文摘要: |
| 阿拉C杠属于啦啦操转体类难度,在啦啦操成套动作中有着至关重要的地位。为探明阿拉C杠的力学原理,为其训练方法和评价标准提供科学依据,本文以机器人学理论为基础建立了阿拉C杠运动过程的人体模型,并对运动过程进行了运动规划和运动学仿真。然后应用拉格朗日方程建立了阿拉C杠动作的动力学模型,针对一种理想的运动状态对阿拉C杠运动过程中人体各主要关节的驱动力进行了分析。最后,根据动力学仿真结果对比了双臂开合、单臂开合和大小T三种手部动作对身体各关节驱动力的影响。分析结果表明,动力腿是阿拉C杠动作的主要动力来源,动力腿髋关节的驱动力不受手部动作的影响。在双臂开合、单臂开合和大小T三种手部动作中,大小T需要的关节驱动力最小。本文为阿拉C杠的训练与评价提供了理论依据,可供练习者在训练过程中参考使用。 |
| 英文摘要: |
| An "Ala C bar" presents a body rotation difficulty of cheerleading,which has a very important position in cheerleading sets.In order to find out the mechanics principle of an "Ala C bar" and provide a scientific basis for its training methods and evaluation criteria,the human body model of an"Ala C bar" motion process is established based on the theory of robotics,and the motion planning and kinematic simulation of the motion process are carried out.Then the Lagrange equation is used to establish the dynamic model of the "Ala C bar" movement.Aiming at an ideal motion state,the driving force of the main joints in the process of "Ala C bar" movement is analyzed.Finally,according to the dynamic simulation results,the influence of three types of hand movements,double-arm opening and closing,single-arm opening and closing and big-small T,on the driving force of each joint of the body is compared.The analysis results show that the power leg is the main power source of the "Ala C bar" movement,and the driving force of the power leg hip joint is not affected by the hand movement.Among the three types of hand movements of double arm opening and closing,single arm opening and closing,and big-small T,big-small T requires the least joint driving force.This study provides a theoretical basis for the training and evaluation of an"Ala C bar",which can be used for a reference by practitioners in the training process. |
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