摘要
Bounce指音乐会或体育比赛中常见的观众双脚不离地的身体有节奏的上下往复运动。利用测力板以及无线测力鞋垫,开展了单人在不同频率下的Bounce荷载的测试试验,共得到了109人次822条有效单人Bounce荷载记录。在此基础上,建立了Bounce荷载的傅里叶级数模型,给出了四阶动载因子和相位角的建议值,并与国外已有模型进行了对比分析。本文模型所模拟的Bounce荷载与实测荷载的时域特性相同,所引起的结构响应幅值一致,可供工程设计参考使用。
Bounce means up-down movements of human body with two feet remaining on the ground,it is a typical activity of audience in a concert or sport game. Tests were conducted to measure a single person＇s bouncing load with different frequencies using a force plate and a wireless dynamometer insole. 109 persons participated in tests to generate 822 individual bouncing load records. A fourth-order Fourier series model was built to describe the bounce load,whose coefficients called dynamic load factors and phase angles were determined with the statistical analysis of measured records.The proposed model was compared with other available models according to model parameters in time domain. It was shown that simulated bounce load curves with the proposed model have similar shapes to those of the measured loads; the responses of a single-DOF system to simulated and measured bounce loads,respectively are nearly the same.
出处
《振动与冲击》
EI
CSCD
北大核心
2016年第17期52-57,共6页
Journal of Vibration and Shock
基金
国家自然科学基金(51478346)
