轨道参数对轨道系统导纳特性的影响

利用轨高频振动模型预测了各在数对轨道系统导纳特性的影响，结果表明：道床刚度、轨枕质量和轨枕垫刚度是影响轨道系统二阶共振频率以下共振和反共振的主要因素，随着床刚度增加，或轨枕质量减小，或轨枕垫刚度增加，第一、二阶共振和第一阶反共振频率增加，道床阻尼、轨枕垫阻尼主要影响第一、二阶共振和第一阶反共振振幅，阻尼越大，共振峰值和反共振谷值越平缓。轨枕跨度的变化，最主要要影响与跨相关振型的振动，如第二阶反共振、第三阶和反共振频率 ，其共振或反共振频率随机枕跨距增是降低。

The Effect of Track Structure Parameter on Receptance of Track System

The receptance characteristics of track system has been predicted with the three dimensional track for high frequency vibration, with this model, the structure parameters of track system affect onreceptance have been discussed. The results show that the stiffness of ballast, sleeper mass, and stiffness of railpad are the main factors affecting on resonance and antiresonance under second resonance frequency. Under thesecond resonance frequency, with the increasing of the stiffness of ballast, stiffness of rail pad and decreasing ofsleeper mass, the resonance and anti-resonance frequency of the track system increase. The dampness of dampness of railpadand ballast gives an effect on amplitude of resonance and anti-resonance of track system. The span of sleepermainly controls the frequency of the second resonance, and the third resonance and anti-resonance. As the spanincreases, these resonances or anti-resonance frequencies will decrease.