钢渣处理车间落锤致振动影响及减振效果分析

VIBRATION CAUSED BY DROP HAMMERS IN STEEL SLAG TREATMENT WORKSHOPS AND VIBRATION REDUCTION EFFECT ANALYSIS

工业炼钢厂房机械作业具有强度大、振动明显、危险性高等特点,对厂房结构安全和其园区内的工作人员的工作舒适度产生一定的影响,厂房振动不满足要求时,宜进行改造或采取减隔振措施以提高厂房的安全性和舒适性。以广东湛江宝钢厂的钢渣处理车间为研究对象,开展实地振动测试,分析落锤处理钢渣工艺对结构与周围环境振动的影响,提出减振措施并建立有限元模型分析其减振效果。结果表明:落锤产生的地面振动响应较大,在局部地区,地面振动加速度和振动计权加速度级超出了GB 50868—2013《建筑工程容许振动标准》容许值,对舒适度影响显著;厂房结构对振动的阻隔作用不明显,周围环境振动较大;采用增设软土层的方式减振效果明显,软土层厚度0.3 m时,振动幅值减小至原值的10%。

The mechanical operation of industrial steel-making plant has the characteristics of high strength,obvious vibration and high risk,which has a certain influence on the structural safety of the plant and the working comfort of the staff in the park. If the vibration of the plant does not meet the requirements,it is necessary to carry out modification or take vibration isolation measures to improve the safety and comfort of the plant. Taking the slag treatment workshop of Zhanjiang Baogang plant in Guangdong as the research object,field vibration test was carried out,the impact of the drop hammer treatment process on the vibration of the structure and the surrounding environment was analyzed,the vibration reduction measures were put forward,and the finite element model was established to analyze the vibration reduction effect. The results showed that the ground vibration response caused by falling hammers was large. In some areas,the ground vibration acceleration and the weight acceleration level of the vibration meter exceed the allowable limit value of the specification,which had a significant impact on comfort;the isolation effect of the building structure on vibration was not obvious,and the surrounding environment vibration was large;the vibration reduction effect was obvious by adding soft soil layer;when the thickness of soft soil was 0. 3 m,the vibration amplitude decreased to 10% of the original value.