High-speed railway highlights
The article deals with the design features of the high-speed railroad (HSR). Comparison and advantages of HSR with air transport are given. HSR is a social and political project that shows Russia’s technical and technological achievements. Therefore, it is hardly advisable to apply the standard economic criteria of rationality to it. In the article for internal evaluation of the optimality of the route, plan, profile, the criterion of the cost of one saved minute is suggested when moving along the HSR in comparison with the time of movement on the existing railway. In accordance with the proposed electric train power, the article analyzes and suggests the parameters of the longitudinal profile elements. As an element of rounding-off curve in the plan and profile, instead of a circular curve, a bicloidoid is recommended, whose mean radius is twice as large as for a substituted curve. This reduces the forces of interaction between the wheel and the rail, which contributes to the smoothness of the train and the stability of the track. It is proposed on the rise, especially with steep slopes, to project the profile not by straight lines, but by curvilinear elements, bringing it closer to an energy-optimal outline. A number of critical remarks are given regarding the «Special Technical Conditions», in which, for example, the requirements for a mismatch in the curve and profile are not justified (Norm: unsettled acceleration an ≤ 0,6 m/s2) and a number of others.