破碎筛分厂房振动性态测试与评估  

Test and evaluation on vibration performance of a crushing and screening plant

作　　者：朱丽华[1,2] 白国良[1] 李晓文[2] 姜孔毅[3] 曾金盛[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]西部建筑科技国家重点实验室(筹),陕西西安710055 [3]鞍钢集团矿业公司,辽宁鞍山114001

出　　处：《西安建筑科技大学学报（自然科学版）》2012年第5期689-694,共6页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金项目(50908186);长江学者和创新团队发展计划资助;陕西省教育厅自然科学专项(12JK0921)

摘　　要：某铁矿石破碎筛分车间布置了9台破碎机,且破碎机基础平台与主厂房结构没有脱开.破碎机的工作扰力导致基础平台与主厂房结构振动严重.为了分析破碎筛分厂房的振动性态,并评估其振动安全性,用自由振动法和脉动法现场测试了结构动力特性参数,并测试了破碎机不同开启工况下的结构和基础平台的振动位移.建立了有限元模型,并进行模态分析和谐响应分析,有限元计算结果与现场动测结果基本一致.研究表明,破碎机引起的破碎筛分厂房振动超限;随着开启破碎机的增多,结构的振动位移相应增大,但局部振动和破碎机的开启工况有关.There are nine crushers in a crushing and screening iron ore plant, and the foundation platform of the crushers is not separated from the main plant structure. The disturbing force of crushers leads to serious vibration of foundation platform and main plant structure. In order to analyze the vibration performance of the crushing and screening plant and evaluate its vibration safety, the structural dynamic characteristic parameters are tested in site with free vibration method and pulsation method, and then the vibration displacement of the structure and foundation platform under different working condition of crushers are measured. A finite element model is established, and then modal analysis and harmonic response analysis are done. The calculation results are basically in accordance with the test results. The study shows that the vibration of crushing and screening plant induced by crushers are overrunning. The structural vibration displacement increases with the increase of opening crushers, but the local vibration is related to the working condition of crushers.

关 键 词：破碎筛分厂房 振动测试 动力机器基础 谐响应分析 

分 类 号：TU311.3[建筑科学—结构工程] TU317