摘要
环境振动是影响各类精密仪器设备正常运转的重要因素。针对环境振动超出设备正常运转振动限值问题,开展了钢弹簧隔振基台的设计研究。通过试验验证及计算分析推导出钢弹簧竖向刚度与水平刚度的关系式,解决了钢弹簧水平刚度取值模糊问题;根据需求设计了一种全新钢弹簧浮筑板隔振基台;利用有限元方法研究了该基台在不同钢弹簧刚度下的减隔振效果,分别分析了上方设备质量分布不均匀时基台的变形情况、存在运动部件时基台变形情况以及台面振动水平。结果表明:新型钢弹簧浮筑板隔振基台在水平向和竖向均具有良好的隔振效果,当基台固有频率为4.2 Hz时,对12 Hz以上环境振动的最大减振效率可达90%以上;对于基台上存在小件运动部件的设备也表现出良好的稳定性,50 kg运动部件从基台一端运行到另一端时,基台竖直变形均小于800μm,且当设备自身振动产生的扰力<1.5 kN时,基台仍能保持VC-C的振动水平。研究结果可为类似工业厂房中设备的隔振设计提供参考。
Environmental vibration is an important factor that affects the normal operation of various precision instruments and equipment.To solve the problem that the environmental vibration exceeds the vibration limit for the normal operation of equipment,the design of steel spring vibration isolation base is investigated.Through experimental verification and calculation analysis,the relationship between the vertical and horizontal stiffness of steel spring is derived,and the fuzzy problem of horizontal stiffness of steel spring is solved.A novel steel spring floating slab vibration isolation base is designed based on the requirements.The finite element method is utilized to study the vibration reduction and isolation effects of the pedestal under different steel spring stiffnesses.The deformation of the pedestal above the equipment with uneven mass distribution,the deformation of the pedestal with moving parts,and the vibration level of the pedestal are analyzed respectively.The analysis results show that the new steel spring floating slab vibration isolation base exhibits excellent horizontal and vertical vibration isolation effects.When the natural frequency of the base is 4.2 Hz,the maximum vibration reduction efficiency for the environmental vibration above 12 Hz can exceed 90%.The equipment with small moving parts on the base also demonstrates good stability.When the 50 kg moving parts move from one end of the base to the other,the vertical deformation of the base is less than 800μm.When the disturbance force generated by equipment vibration is less than 1.5 kN,the base can still maintain the vibration level of VC-C.The research results can provide valuable references for the vibration isolation design of equipment in similar industrial plants.
作者
梁新奇
兰日清
韩蓬勃
汪志昊
杨程
LIANG Xinqi;LAN Riqing;HAN Pengbo;WANG Zhihao;YANG Cheng(School of Civil Engineering and Communication,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;SINOMACH Engineering Vibration Control Technology Re-search Center,SINOMACH Academy of Science and Technology Co.,Ltd.,Beijing 100080,China)
出处
《地震工程与工程振动》
北大核心
2025年第1期113-120,共8页
Earthquake Engineering and Engineering Dynamics
基金
中国机械工业集团有限公司重大科技专项(SINOMAST-ZDZX-2020-03)。
关键词
钢弹簧隔振器
水平刚度
环境振动
隔振基台
减隔振
steel spring isolator
horizontal stiffness
environmental vibration
vibration isolation base
vibration reduction and isolation
