摘要
目的:对比不同刚体模型的仿真精度,探讨不同刚体模型的体操落地冲击动力学差异。方法:创建19(模型1)、16(模型2)、14(模型3)、13(模型4)、12(模型5)环节的人体多刚体模型和体操落地垫模型,进行自由操落地动力学仿真。结果:除模型4外,其余模型仿真获取的膝关节角度曲线与运动学解析结果非常接近。综合对比髋、膝、踝关节角度、GRF及到达时间,模型3最适用于重现自由操落地实际运动表现。右膝关节伸肌力矩峰值从模型1到模型5依次降低,模型1最大(281 N·m);屈肌力矩峰值从模型1到模型5依次增大,模型5最大(48 N·m)。结论:模型3仿真精度最高,完全可以重现实际运动学表现。膝关节屈曲角度对伸肌、屈肌力矩峰值影响较大。
Purpose： The purpose of this study was to explore the impact dynamics of floor exercise landing by investigating the simulation precision of different rigid-body models. Methods： Five rigid-body models with 19- segment（model 1）,16- segment（model 2）,14- segment（model 3）,13- segment（model 4）,12- segment（model 5） and floor exercise landing mats model were established,and were used to do simulation of impact dynamics. Results： Except model 4,all rigid-body models gained the knee angle curve which is similar to kinematic result. Considering the angles of hip,knee and ankle,ground reaction force（GRF） and the time to get peak GRF,model 3 is the best one to reproduce the real performance of floor exercise landing. The peak torque of knee extensor is decreased from model 1 to model 5 one by one,model 1 has the largest torque（281 N·m）. The peak torque of knee flexor is increased from model 1 to model 5 one by one, model 5 has the largest torque（48 N·m）. Conclusions： Model 3 has the highest precision,can reproduce the real sports. Flexion angle of knee has an obvious influence on peak torques of extensor and flexor.
出处
《北京体育大学学报》
CSSCI
北大核心
2015年第3期78-83,共6页
Journal of Beijing Sport University
基金
国家自然科学基金(10972062)
国家体育总局体育科学研究所基本科研业务费专项(基本13-02)
关键词
多刚体模型
仿真精度
冲击动力学
自由操
落地
multi-rigid body model simulation precision impact dynamics floor exercise landing
