摘要
提出了包含钢轨断面弹性变形、轨下不连续支承、横垂向交叉导纳的轨道高频振动分析模型。根据轮轨特点 ,提出适合轮轨高频振动分析的阻抗聚缩法。预测结果与试验结果吻合较好。分析表明约 80 0 Hz以下 ,钢轨振动表现为整体振动 ,再高频率钢轨发生断面弹性变形的振动。我国轨道系统第一、第二阶共振频率分别为 150 Hz和 32 0 Hz,pinned- pinned共振频率为 12 80
A new railway track model for high frequency vibration, which includes the deformation of rail's cross\|section, the discrete supports and cross receptance, has been established. A wheel/rail contact characteristic have been introduced into the method of substructure impedance condensation to calculate the receptance. The result shows that rail vibrates as a rigid body below 800 Hz, the deformation of rail's cross\|section will happen at the frequency higher than 800 Hz, The model predicting results have a better coherence with the experiments one. Chinese railway track receptance has been predicted, the 1 st and 2 nd resonances are 150 Hz and 320 Hz respectively, the pinned\|pinned resonance is 1280 Hz.
出处
《计算力学学报》
CAS
CSCD
2000年第3期343-348,共6页
Chinese Journal of Computational Mechanics
基金
辽宁省博士启动基金资助
牵引动力国家重点实验室基金资助
关键词
动态子结构
轮轨
高频振动
轨道系统
高速铁路
dynamic substructure
wheel/rail
high frequency vibration
mechanic receptance
wheel/rail noise
