摘要
为解决低频环境振动导致重型数控机床加工精度降低问题,考虑机床与振源距离、振动频率等因素,采用Plaxis建立基于黏弹性人工边界的振源-土体-隔振沟三维模型,系统分析空沟、填充沟的参数(深度、宽度、距离、填充材料等)对隔振效果的影响,并首次提出空沟-泡沫填充沟的组合形式。结果表明,隔振沟深度是决定性因素,隔振沟距离越远隔振效率相对越低,空沟宽度影响很小,泡沫填充沟宽度的影响小于深度,双泡沫填充沟方案是比单泡沫沟更经济有效的替代方案,而空沟-泡沫填充沟的隔振性能更好且结构更稳定,最终,将此新型组合隔振形式应用到机床隔振,优化隔振沟参数后可将振动响应降低到原来的15%以下,有效降低环境振动对机床的影响。
To solve the problem of accuracy reduction of heavy-duty CNC machine tools caused by low-frequency environmental vibration,a three-dimensional model of vibration source-soil-isolation trench with viscous boundary conditions is established by Plaxis,with the factors of the distance between the machine tool and the vibration source and the vibration frequency considered.The influence of the parameters of empty trenches and infill trenches,such as depth,width,distance,filling material,etc.,on the vibration isolation effect is systematically analyzed,and the combined trench form of open trench and cascading foam infill trench is firstly proposed.It is found that the depth of the isolation trench is the decisive factor,the farther the isolation trench is,the lower the isolation efficiency is.The influence of width of the open trench is negligible,the width of the foam infill trench has a lower influence than the depth.The double foam infill trench is more economical and effective than the single foam trench.The combination of open trench and foam infill trench has better isolation performance and it′s structure is more stable.Finally,the new trench is applied to machine tool vibration isolation.After the optimization of the parameters of the trench,the vibration response of the machine tool is reduced to less than 15%of the original value,which efficiently mitigates the influence of environment vibration on the machine tools.
作者
苏贺旺
刘志峰
李彦生
姜凯
张建涛
SU Hewang;LIU Zhifeng;LI Yansheng;JIANG Kai;ZHANG Jiantao(Machinery Industry Key Laboratory of Heavy-duty Machine Tool Digital Design and Testing Technology,Beijing University of Technology,Beijing 100124,China;Key Laboratory of CNC Equipment Reliability,State Ministry of Education,Jilin University,Changchun 130000,China)
出处
《噪声与振动控制》
CSCD
北大核心
2024年第1期226-233,共8页
Noise and Vibration Control
基金
国家自然科学基金资助项目(51975019)。
关键词
振动与波
重型数控机床
隔振沟
有限元分析
vibration and wave
heavy-duty CNC machine tools
vibration isolation trench
finite element analysis
