本文選題：人體-結(jié)構(gòu)相互作用　切入點(diǎn)：雙足步行模型　出處：《建筑結(jié)構(gòu)學(xué)報(bào)》2014年S1期

【摘要】：基于生物動(dòng)力學(xué)中的雙足步行模型研究人體-結(jié)構(gòu)相互作用,采用Lagrange方程推導(dǎo)人體-結(jié)構(gòu)相互作用系統(tǒng)的運(yùn)動(dòng)方程。提出時(shí)變阻尼假定,使支撐腳剛接觸地面時(shí)人體產(chǎn)生的地面反力為零。通過施加水平控制力的反饋機(jī)制保持行走中的步態(tài)穩(wěn)定。采用自編Matlab程序進(jìn)行數(shù)值分析,將基于雙足模型的兩座人行天橋的人體-結(jié)構(gòu)相互作用計(jì)算結(jié)果與基于時(shí)域的外激勵(lì)模型的計(jì)算結(jié)果進(jìn)行對(duì)比。研究結(jié)果表明,對(duì)于柔度較大的人行天橋,人體-結(jié)構(gòu)相互作用較大,每一步的人體動(dòng)力響應(yīng)有所不同,步行中產(chǎn)生的橋面反力也隨著行人向跨中移動(dòng)而逐漸增大,需要施加更大的水平控制力來保持步態(tài)穩(wěn)定。
[Abstract]:Based on biped walking model in biomechanics, the human-structure interaction is studied, and the motion equation of human-structure interaction system is derived by Lagrange equation.The assumption of time-varying damping is put forward to make the ground reaction of human body zero when the supporting foot is in contact with the ground.Gait stability during walking is maintained by the feedback mechanism of applying horizontal control force.The numerical results of the human-structure interaction of two footbridges based on biped model are compared with those of the external excitation model based on time-domain.The results show that for the footbridge with higher flexibility, the human-structure interaction is greater, and the dynamic response of the human body is different with each step, and the reaction force of the bridge deck generated in the walking step increases gradually with the pedestrian moving toward the middle of the bridge.Greater horizontal control is needed to maintain gait stability.
【作者單位】： 中國電子工程設(shè)計(jì)院;北京交通大學(xué)土木建筑工程學(xué)院;
【基金】：國家自然科學(xué)基金重點(diǎn)項(xiàng)目(50938008)
【分類號(hào)】：TU311.3
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本文編號(hào)：1726195