To meet the ever-increasing demand for the railway transportation, the operation of heavy-haul trains is an effective way to improve transport capacity.

So In this thesis, the asynchronism brake control is studied thoroughly from three aspects: modeling of the heavy-haul trains, designing of the asynchronism brake control method and implementing of the asynchronism brake control unit.

This article describes the formations of heavy-duty combination freight trains,theoretically analyzes the principle and magnitude of longitudinal impact under traction and braking conditions,elaborates the security risks that could exist in case of a large longitudinal impact,and describes an operational control strategy for reducing longitudinal impact on heavy-duty combination freight trains.

Design and simulation of heavy haul train operation algorithm;

According to the test of dynamic stress of the 5 000 t heavy haul train and the AAR service standard,this paper compiled the stress spectrum of survey station in train body,load spectrum of center plate,longitudinal load spectrum and roll load spectrum.

This paper analyzes the problems existing in Daqin Railway at present, expounds some measures for operating the heavy haul train of 20 thousand tons on Daqin Railway, and advances the conception of operating the heavy haul train of 20 thousand tons on Daxin Station.

Based on the analysis of the problems with the existing air brake system for heavy-haul express freight train, this paper discusses the requirements of the brake system for 5 000 ton heavy-haul train when operating at a speed up to 120 km/h on busy trunk lines.

The article explains 5,000 t and above heavy-haul train s operation on Tianjin-Puzhen and Xuzhou-Nanjing East railways, influence on car application target and locomotive application efficiency, and initial benefit and expenditure items increased.

In this paper,the train group formation of high speed train and heavy-haul train isfurther discussed and models of calculation are established.