隔振体系的数值模拟及连续屏障作用下控制点的振动响应

Numerical simulation of vibration isolation and response of reference point under continuous isolation gouge

动力设备振动过大致使精密仪器不能正常工作,必须采取隔振措施使振动的幅值控制在容许范围以内。规范方法无法得到解析解。采用有限元软件ANSYS建立动力设备隔振体系的有限元模型,模拟动力设备振动下的控制点在不同工况及不同连续屏障下的振动响应,可得到任意点的动力响应曲线,为拟建的精密仪器微振动控制提供分析数据和理论依据。针对中国计量科学研究院实验二基地的防微振工程,建立了动力设备扰力作用下包括连续屏障隔振措施在内的三维有限元模型,计算了相同隔振沟下不同扰频对振动的影响,控制点振动随隔振沟深度、距离的变化规律,以及混凝土弹性板、大块混凝土块体对控制点振动的影响,为中国计量科学研究院实验二基地的防微振设计提供依据。

Strong vibration of dynamic equipments makes metrology work unaccurately. Measurements to reduce isolation must be taken. Calculation of the vibration of dynamic equipments isn＇t universal in Code. The finite element model for vibration isolation of dynamic equipments is built using the finite element software ANSYS, the isolation results are on the basis of which the typical vibration responses under different load cases and different continuous isolation gouge are simulated, any point vibration response can be got. The analysis results are to provide the theoretical and numerical references for mierovibration control of Hi-teeh facilities. By considering the NIM engineering, the finite element model is built. The influences of disturbing forces with different frequencies on vibration are analyzed under the same isolation gouge. Further the characteristics of typical spot vibrations are discussed in detail with regard to the different depth, the different distance of isolation gouge and concrete slab, concrete block. It can be references for the NIM engineering.