.120 Km / H Plate Refrigerated Car Body Steel

With the development of national economy and the increasing perishable cargoes, and to meet the needs of railway speed increasing, it is urgent to develop 120km/h mechanical cool plate refrigerator cars, which apply the cool plate to railway vehicles. As the load-bearing structure, the development of the car-body steel structure is one of the main tasks.The main tasks of development and methods utilized include: the structure is designed in accordance with the overall scheme. The car body is with integral-load-bearing whole-steel welding structure, weather-resistatant steel is selected as the plate material. The profile of car meets the needs of the car delimitation. Using the finite element analysis method, a calculation model for the car-body steel structure is built, the strength and rigidity of the cars are calculated, and the structure design is verified to satisfy the car strength criterion. The manufacturing quality of the model cars is ensured by technical preparation and equipment. The data from the test on the model car basically meets the technical requirement. The static strength test is carried on the model cars, and the resulting data indicates that the strength and rigidity of model car steel structure meet the criterion. The technical performances of the model cars remain good after the application test.Effect of corrosion on the strength of the car-body steel structure is also analyzed, and three analysis methods are put forward. The strength and rigidity of the steel structure after different years of corrosion are estimated and predicted. The extent and tendency of effect of corrosion on the strength and rigidity are analyzed with increasing years of application of cars.Optimization design on the above car-body steel structure is discussed. A weight lightening method and principle of steel structure is put forward based on sensitivity analysis. The stress sensitivity, displacement sensitivity, and mass sensitivity of several variables of car-body steel structure are calculated to precisely control the effect of each variable on the strength, rigidity and mass of car-body steel structure. A scientific analysis and calculation method is provided for weight lightening of the car-body load-bearing structure via structure optimization, sensitivity analysis and parameters optimization of the car-body steel structure.It is proved that the car-body steel structure of the new refrigerator cars meet the technical parameters requirements, it can meet the needs of railway refrigeration transport at the speed of 120km/h, and also the development aims are achieved. Experiments and application tests prove that the new refrigerator cars with good refrigeration effect, higher speed, and large volume. And the cars are flexible for usage, economical, reliable, energy-saving, and environmentally friendly, so it will create excellent economic benefit and social benefit.