简要介绍了世界高速铁路的发展情况，着重论述了高速列车所处的动态环境，以及为此而开发出来的关键技术及需要进一步研究解决的问题，论述了在我国修建高速铁路的必要性和可行性，并对加速建设京沪高速铁路提出了建议。

In this paper some preliminary results are presented for a fast non-steady state creep force model which is based on Kalker's simplitied theory of rolling contact (J. J. Kalker, Vehicie Syst. Dynamics, 11 (1982)1-13). Problems with moderate non-steady state creepage and small non-steady spin can be treated at a very high speed on a personal computer with this method. Comparison made with CONTACT (J. J. Kalker, Three-Dimensional Elastic Bodied in Rolling Contact, Kluwer, Dordrecht 1990). shows its promise for dynamic simulation. further effort to reduce its error and to make it suitable fortreating non-steady normal force and non-steady varying contact patch is needed.

The seriousness of the rail sidewear problem on Chinese Railways has been describedin this papar. Things account for the occurance of this probiem and measures takon to solve it are discussod. Recommendation on improvements of the rail quality an rail maintenance are given as conclusions of this paper.