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基于考虑人体动力特性的新型双足模型,采用Lagrange方程建立了步行过程中人与结构相互作用系统运动方程。研究了人与结构各自的动力响应及其之间相互作用,并通过对比说明了新型双足模型反映的人体动力特性对结构振动的影响。结果表明:人与结构相互作用增大结构动力响应;行人经过结构各阶模态振型波峰时,结构各阶模态频率和阻尼比分别达到最小值和最大值。
Based on the new biped model considering the dynamic characteristics of human body, Lagrange equation was used to establish the system of equations of motion of human-structure interaction during walking. The dynamic response of human and structure and the interaction between them are studied, and the effect of human dynamic characteristics reflected by the new two-legged model on the structural vibration is illustrated by comparison. The results show that the interaction between human and structure increases the dynamic response of the structure. When the pedestrian passing through each mode of structural modal vibration peaks, the modal frequencies and damping ratios of the structures reach the minimum and maximum respectively.