摘要
研究人对结构动态特性的影响.以木质横梁为研究对象,电子激励器为背景激励;人站立于横梁跨中,并测试人静止和拍手两种情况下结构的加速度响应,通过实测值和理论值之间的互相关性确定结构的模态参数.研究结果表明人静止和活动时,结构的固有频率下降,阻尼增加,而人静止时阻尼增加相对较大.
The influence of human body on dynamic characteristics of the structure is analyzed in this research. Object of this study is a simple beam and the shaker is used as background excitation. The acceleration responses of beam were measured when person in static state （passive person） or in active state stood （active person） on the beam. The dynamic parameters of the structure were identified from a correlation analysis between observed amplitudes and theoretical amplitudes. The results show that, for the person-structure coupled system, nature frequency of the structure is decreased and damping is increased. Moreover, the increase of damping with passive person is bigger than that with active person.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2013年第3期235-238,共4页
Transactions of Beijing Institute of Technology
基金
国家科技部国际合作资助项目(2010DFB74280)
关键词
耦合系统
动态特性
人-结构相互作用
coupled system dynamic parameters human-structure interaction
