Large-scale scientific facilities with high precision such as high energy photon source usually have strict requirement in micro-vibration controlling.Inorder to study the properties of micro-vibration in a large-scale and high precise facility,a field test composed of shock-excitation,vehicle running excitation and ambient excitation has been finished.Root mean square values of displacement during 1 Hz to 100 Hz in 1 s has been calculated through obtained vibration data of vibration velocity.Results show that the micro-vibration level satisfies the requirement for the facility under ambient excitation,and the signals of micro-vibration on experimental hall generally distribute from 5 Hz to 30 Hz.Vehicle running has significant adverse influence on the micro-vibration level of the site.Moreover,the micro-vibration level of the whole site maintains the same under ambient excitation.It has significant theory and reference value for the anti-micro-vibration controlling of the facility as well as similar engineering project.
关键词
大体积混凝土底板/微振动/位移有效值/冲击激励/环境激励
Key words
mass concrete layer/micro-vibration/effective value of displacement/shock excitation/ambient excitation
维普
万方数据