列车轮群激励的频谱

本文提出：由于列车的运行，线路在通过列车轮群周期性力作用下的强迫振动，因而，线路振动是不可避免的。通过对列车车轮群激励的频谱分析，指出它们主要集中在数十赫芝以内，对线路自振动频率较低的下部结构物特别有害，在设计高速铁路线路和旧线提速改造时对它们的破坏作用应予以重视。

The Spectrum of Excitation by Passing Train Wheels

oints out that track is in forced vibration because of periodic forces caused by poing train wheels exerting on it. So, the track vibration is unavoidable. After analysing the spectrum of wheels excitation,this paper concludes that the force is concentrated within tens Hertz. It is harmful especially. to track sub-rail foundation that has lower natural frequency.Hence, full attention must be given in designing high speed railway and reconstructing old track for higher speed.