临涣选煤厂煤炭筛分厂房振动检测与分析  

Vibration detection and analysis of coal screening plant in Linhuan coal preparation plant

作　　者：沈超[1] 李大华[1] 刘亿[1] 宛新林[1] 张海龙[1] 

机构地区：[1]安徽建筑大学土木工程学院,安徽合肥230022

出　　处：《选煤技术》2015年第5期24-27,共4页Coal Preparation Technology

基　　金：安徽省教育厅自然科学研究项目(KJ2012Z048)

摘　　要：为保证临涣选煤厂煤炭筛分厂房结构安全,在对厂房振源判断、自振检测、强迫振动检测的基础上,分析共振原因。研究结果表明:筛分机产生的挠力是使设备下方的梁板产生共振的原因,设备对结构的干扰频率与梁板竖向自振第1模态频率接近,而直接承受恒载与挠力的次梁刚度较小,导致结构动力响应增强。为此,应采取有效措施加强次梁和楼板的刚度。In order to ensure the structure of coal re - screening plant in Linhua coal preparation plant, the reason of resonance is analyzed by deciding vibration source, detecting natural vibration and forced vibration. The results show that resonance of beam - plate under equipment is caused by flexural stress from screens, what＇s more, interfering frequency to structure of the plant , caused by equipment, is close to first modal frequency generated by vertical natural vibration of beam - plate, however, smaller rigidity of secondary beam directly supporting horizontal load and flexural stress, will increase dynamic response of the structure. For this reason, measures should be taken to strengthen rigidity of secondary beam and floor.

关 键 词：框架结构 结构共振 动态检测 

分 类 号：TD921.3[矿业工程—选矿] TU311.3[建筑科学—结构工程]