新型低刚度减振轨道特性研究

Research on New Low Stiffness Anti-Vibration Track

为减小轨道交通对沿线的振动影响,提高轨道结构的减振性能,提出新型低刚度减振轨道设计方案。新型低刚度减振轨道与现有的减振轨道相比,具有更小的垂向刚度,从而降低轨道结构固有频率,提高减振性能。新型低刚度减振轨道的低刚度是由新型隔振器提供的,隔振器的弹性元件由金属橡胶元件和碟形弹簧元件构成,利用正负刚度并联的原理减小工作区间的刚度。通过ANSYS有限元软件对轨道结构和隔振器力学特性进行仿真分析,得到了不同轨道结构的结构特性和不同工况下隔振器的工作范围。结果表明,梯形轨枕结构具有较好的平均载荷的能力,证明设计的隔振器工作区间基本合理。可为低刚度减振轨道的进一步研究提供了科学依据。

To diminish the vibration effects of the rail transit and improve the vibration isolating performance of track structures, the paper presented a kind of low stiffness track. The natural frequency of the low stiffness track is smaller than the normal because of the new vibration isolator. The low stiffness is offered by the new isolator which consists of a metal-rubber element and a disc spring element. It takes the advantage of positive and negative stiffness in parallel to reduce the stiffness of the track. The paper presented the property of different track structures and the working range of the isolator in different conditions by the finite element software ANSYS. The results show that the ladder sleeper is better at averaging the load of the train, and exhibits that the working range of the isolator is reasona- ble. The paper provides a scientific basis for further study of the low stiffness track.