摘要
以无锡某地道路施工近距离经过尼康光学仪器厂为研究背景,对现场道路边和厂区内精密仪器所在位置的环境振动进行测试。对测试数据进行统计和处理,得出振动压路机振动速度以及铅垂向Z振级衰减规律,预测厂区精密仪器处振动幅值;并与实测值进行对比。结合国际通用的VC标准,以此评价压路机振动对精密仪器的影响。研究结果表明,压路机引起的地面振动速度和铅垂向Z振级随振心距的增大逐渐减小,衰减规律符合负幂函数关系曲线。预测精密仪器位置处振速v=3.974×10^(-2)mm/s介于VC-A和VC-B曲线之间,满足企业提出的精密仪器振动控制标准。预测精密仪器位置处铅垂向Z振动级VL_z=67.519 db,接近VC-A曲线限值,基本满足企业提出的控制标准。在不考虑精密仪器基础隔振系统的影响下,预测值基本符合环境振动分析仪测量值。
A road construction in Wuxi planned to be close to Nikon optical instrument factory as the research background.To predict influence on these instruments,environmental vibration on roadside and location of sensitive instruments in the factory were tested.The vibratory velocity and vertical vibration level Z attenuation law of vibration roller were obtained by the test data processing and statistics,predicting the vibration amplitude of precision instrument and compared with the measured value,according to the international standard of vibration criteria,in order to evaluate vibratory impact on precision instruments.The results show that the cause of the roller surface vibration velocity and vertical vibration level to Z with increasing distance from the vibration attenuation curve decreased gradually,with the negative power function relationship;Prediction precision instrument position velocity v = 3.974×10^-2 mm/s,between VC-A and VC-B curve,the precision instruments meet the enterprise standard of vibration control;prediction precision instrument position vertical to the Z vibration level VL_Z =67.519 db,close to the VC-A limit value curve,basically meet the control standard of enterprise are put forward;The predicted values are consistent with measured value of environmental vibration analyzer when influence of precision instrument based isolation system were not considered.
出处
《科学技术与工程》
北大核心
2017年第7期143-147,共5页
Science Technology and Engineering
关键词
振动压路机
精密仪器
VC标准
Z
振级
vibratory roller
sensitive instrument
vibration criteria standard
Z vibration level
