China’s railways are among the busiest and largest in the world. More than 110,000 kilometers of track connect all major cities and industrial areas for transporting passengers and goods. Transporting freight by train can be more energy efficient than by trucks or ship, especially over long distances. China annually transports over 4 billion tons of bulk cargo by rail, primarily coal, ores, minerals and grain. Driven by the enormous growth of its heavy industries, China plans to expand the network to 270,000 kilometers of track by 2050 to accommodate the expected increased demand for freight traffic capacity.
As a leading enterprise and exporter in the field of designing and manufacturing freight cars and cranes, CRRC Taiyuan Railway Equipment Co., Ltd. (railway vehicles ) helps facilitate this expansion by producing over 300 product types in nine categories for the local railway market, as well as for export to more than 20 countries and regions on five continents. This includes all types of railway vehicles , such as covered wagon, open top wagon, long, flat and hopper wagon as well as special-purpose wagons for transporting items such as hazardous materials.
These railway rolling stock body structures undergo severe dynamic loading while in operation. The roughness of the rails, braking, curve passing and other cyclic or transient events subject them to enormous repeated stress over their lifetime. This can cause cracks and fractures in components such as the body, bogies, axles and bolsters. Therefore, avoiding fatigue damage is of primary importance when designing freight cars. On top of that, the market continuously demands faster transport in lighter vehicles to reduce time and cost. This could represent contradictory requirements, as higher speeds increase the dynamic loads, while reducing the amount of material could weaken the structure.
Railway engineers spend a substantial amount of development time trying to meet their customers’ financial considerations without compromising safety and durability. As so-called “design by experience” leads to recurrent prototype testing and long and expensive development cycles, CRRC Taiyuan Railway experts are constantly looking for new durability engineering technologies, including simulation, that frontloads design decisions and delivers better performance on the first attempt, drastically shortening development time.
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