Comprehensive test and analysis of stress on the tarpaulin of railway freight cars

Wagon tarpaulin is one of the important tools for railway freight transportation and occupies an important position in my country's railway transportation. With the further improvement of the running speed of railway passenger and freight trains, the traditional tarpaulin thatch cover method and tarpaulin type can no longer meet the requirements of railway speed increase. The cloth rope net has been put into practical operation in large quantities, the use of new materials and the change of its structure have changed its stress situation, and the standards and technical conditions of the new tarpaulin, tarpaulin rope and tarpaulin rope net need to be proposed. At present, the standards and technical conditions of railway tarpaulins, tarpaulin ropes and tarpaulin rope nets in my country are mainly formulated based on relevant foreign standards and field experience. through systematic research and comprehensive experiments. Faced with the rapid development of railway freight in my country, it is urgent to conduct a comprehensive analysis and evaluation of the force of the tarpaulin, tarpaulin rope and rope net of railway freight cars under complex working conditions. The technical indicators and safe operating conditions of the tarpaulin rope net provide the basis. In this paper, through the method of combining real vehicle test and numerical simulation calculation, for the first time a comprehensive study on the force of railway freight car tarpaulin, tarpaulin rope and rope net under complex working conditions is carried out. The main research work is as follows: real vehicle test research, developed a set of truck tarpaulin, tarpaulin rope and tarpaulin rope net aerodynamic real vehicle test system, realized the real-time measurement of the force of the railway truck tarpaulin under complex working conditions; The actual vehicle test has obtained the aerodynamic tension and tarpaulin stress of the tarpaulin ropes and rope nets of the truck under complex working conditions (including passing through strong wind areas, running and crossing open lines, passing through tunnels and crossing in tunnels), which is helpful for formulating tarpaulins and tarpaulins. The technical indicators of ropes and tarpaulin nets provide a scientific basis.

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