【摘要】 通过建立轨道振动微分方程,推导了单轮作用下考虑轨道不平顺和轨道基础刚度突变的轨道变形解析表达式。利用该解析解和叠加原理,研究了轨道不平顺和轨道刚度突变对轨道振动的影响,分析了单轮对和TGV高速动车通过不同的轨道不平顺和4种轨道刚度比时的轨道动力响应。计算表明,轨道不平顺和轨道刚度突变对轨道振动有较大影响,其影响随着轨道不平顺振幅、刚度比和列车速度的增加而增加。更多还原

【Abstract】 Analytical deformation formula for moving load passing through the track with irregularities and rigidity abrupt change has been derived by establishing the vibration differential equation of the track.The influences of the track irregularities and the track rigidity abrupt change on track vibration is investigated and the dynamic responses of the track under a single wheel and a TGV high speed locomotive passing through the track with different track irregularities and four kinds of the rigidity ratios are analyzed by using this formula and the superposition principle.The computations show that the track irregularities and the track rigidity abrupt change have greater influences on track vibration.This influences increase with increases of the amplitude of the track irregularities,the rigidity ratio and the train speed.更多还原