自由式滑雪空中技巧运动员落地稳定性主要影响因素的研究

Important Influential Factors of Landing Stability of the Skiers of Freestyle Skiing Aerials

对自由式滑雪空中技巧运动员落地稳定性问题建立了四个运动环节的人体运动模型。雪板雪靴、足、小腿定义为环节1,大腿定义为环节2,躯干、头定义为环节3,上臂、前臂、手定义为环节4。根据平动动坐标系下相对动量矩定理建立了描述自由式滑雪空中技巧运动员落地稳定性控制人体对人体质心动量矩的模型。模型是有效的,并能反应落地稳定性控制的内在主要影响因素。

The purpose of the article is that the moving model of the human body can be constructed by joining the series of rigid links to study the landing stability of freestyle-skiing aerial. The human body is modeled as four segments. We constructed model that controls human body mass center moment of momentum during landing. By using the method of multi-rigid body system dynamics study landing stability of freestyle skiing aerials, this paper constructs the four segments plane moving model of biomechanics of the landing stability, further finding factors that influence the landing stability. They are the DES(defined segment)1 2 3 4. The DES1 includes the foot, the skis and the shank. The DES2 is the thigh. The DES3 is the trunk and the head. The DES4 is the arm. It's the major factors of influence on the landing stability.