摘要
文章尝试对人踩钢丝这一传统竞技项目的动力学过程进行理论探索。给出了单悬索系统的振动基本方程,及线性化方法确定系统自由振动的频率与模态方程。分析了人与悬索组合系统的振动特性;详细研究了人体行走在钢丝上的动力荷载状态/并进行了一系列数值分析;由此提出了减弱振动、避免共振,进而利于人体保持重心平衡的具体措施。
In this paper, authors try to analyse the dynamic process of a sportman stepping on the cable-which is one of the worldwide games. The general equations of the vibrations of the single cable system have been erected, and the linear theory is used to determine the frequencies and the modes of the cable system. The vibra tion properties of the system combining person and cable are studied, and the states of the load caused by person stepping on a cable have been analyzed in detail. According to the results obtained from the numeric al calculations, some actual methods to reduce or avoid vibrations are proposed, for the purpose of keeping the centre of gravity of the person body balancing.
