作　　者： ; ;

机构地区： 华南理工大学建筑学院亚热带建筑科学国家重点实验室

出　　处： 《力学与实践》 2008年第3期63-66,共4页

摘　　要： 从静力平衡条件出发,研究撑杆跳高过程中撑杆的截面尺寸变化对应变能的影响,给出了撑杆壁厚沿长度方向的变化规律.利用有限单元法计算了极限变形状态下撑杆的变形曲线,验证了极限状态变形曲线为圆弧的假定.根据能量守恒,引入肌肉收缩做功对跳高高度的贡献,修正了技能指标,得到了考虑运动员体重、身高及握杆高度等影响因素的跳高高度计算公式. In this paper, the effect of the section size on the strain energy of vaulting poles is investigated in the static equilibrium condition. The variation of the wall thickness of the vaulting pole along its length is obtained. The deformation curve of the vaulting pole under the ultimate state is computed by Finite Element Method, and the assumption that the ultimate deformation curve is in a form of arc is verified as well. The performance index is modified based on the energy conservation, taking into account the contribution of the vaulter＇s muscle work to the height of pole vaulting. The computational formula of the vaulting height is derived as a function of the weight, the height of athletes and the pole grasp height.

关 键 词： 撑杆跳高 截面尺寸 应变能 技能指标 握杆高度

领　　域： [建筑科学] [建筑科学] [文化科学] [文化科学]