基于连续行走的人行荷载模型参数实验

发布时间：2018-03-24 02:01

本文选题：人行激励　切入点：姿态转换矩阵　出处：《振动.测试与诊断》2017年04期

【摘要】：为建立人行荷载的傅里叶级数模型,采用新型微电子机械系统AH100B加速度传感器得到201人次、1 407条连续行走在楼板上的荷载曲线。根据姿态角形成的姿态矩阵可将载体坐标系下的三轴加速度转换到自然坐标系下,通过快速傅里叶变换计算人行荷载纵向、侧向和竖直方向前4阶动力荷载因子及相位角,得出用于解决结构振动舒适度问题的三向傅里叶级数荷载模型。采用小波变换得到单条荷载曲线的时频图,反映出单人在行走过程中行走频率的变异性。将荷载模型与已有的其他模型进行比较,验证了荷载模型的合理性及可行性,为解决大跨度结构人行激励产生的振动问题提供了参考。
[Abstract]:In order to establish the Fourier series model of pedestrian load, A new type of AH100B acceleration sensor of microelectromechanical system is used to obtain 1 407 load curves for continuous walking on the floor slab. According to the attitude matrix formed by attitude angle, the triaxial acceleration in the carrier coordinate system can be converted to the natural coordinate system. The longitudinal, lateral and vertical first four order dynamic load factors and phase angles are calculated by fast Fourier transform. A three-direction Fourier series load model is obtained to solve the problem of structural vibration comfort. The time-frequency diagram of a single load curve is obtained by wavelet transform. By comparing the load model with other existing models, the rationality and feasibility of the load model are verified. It provides a reference for solving the vibration problem of long span structure caused by pedestrian excitation.
【作者单位】：兰州理工大学防震减灾研究所;大连理工大学建设工程学部;东南大学土木工程学院;
【基金】：国家自然科学基金资助项目(51668042,51508257) 教育部长江学者创新团队资助项目(IRT13068) 甘肃省高等学校科研资助项目(2015B-34)
【分类号】：TU312.1

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