OTHER PAPER
Theory and Practice of Optimum Correction using Restored Track Irregularity Waveform


Masako KAMIYAMA
Researcher,
Track Dynamics Lab.,
Fundamental Research Div.

Atsushi FURUKAWA
Engineer,
Track Geometry and Maintenance G.,
Track Technology Development Div.,
Technological Development Dept.

Akiyoshi YOSHIMURA
Professor,
Tokyo Engineering University



  We have developed a new theory for correcting track irregularities by applying their restored waveforms and carried out experimental levelling and lining work. In this theory, the optimum shifting/lifting values are obtained as solutions for a typical quadratic programming problem. Restrictions on shifting rails are formulated as constraint conditions of the optimization problem. Furthermore, in the case of levelling work, a designed cross level can be realized. From experimental work on ballasted and slab track, the effectiveness of this theory has been confirmed. In the range of long wavelengths up to 50 m, the amplitude of track irregularity has decreased.