摘要
钢轨的振动形态直接影响着铁路轮轨的接触状态,不同的支撑条件对钢轨的振动有着较大的影响。本文应用模态分析和有限元理论研究了钢轨不同支撑条件对钢轨固有频率和振型的影响。应用环境激励下模态参数识别方法对钢轨在不同支撑条件下的模态参数进行了识别。针对四种支撑方式,分别得到了模态参数,通过理论和试验分析表明,不同的支撑方式对轨道模态参数有较大影响。这一结论为合理铺设轨道提供依据。
The wheel-rail contact was directly effected by vibration shape of rail,rail vibration was largely effected by different support condition.Resonance frequency and vibration shape was studied by different support condition according to the theory of model analysis and FEM,modal parameters were identified by natureal excitation technique.Aimed at different support form and gain modal parameters,the results of test show different support condition largely effecte rail vibration,which is provide foundation to pave rail rational.
出处
《机械》
2007年第9期1-2,9,共3页
Machinery
关键词
模态实验
支撑条件
模态参数识别
modal test
support condition
identify modal parameter
