Train equivalent mold shrinkage construction method and a train equivalent mold shrinkage

Abstract

The invention discloses a train equivalent mold shrinkage construction method and a train equivalent mold shrinkage. The method comprises the steps of acquiring scale factors of the train equivalent mold shrinkage relative to all dynamic parameters of a full-size train; dividing the train into a head train and a middle train according to the deformation energy absorption characteristics in the train collision process, and dividing the head train into a deformation energy absorption area and a non-deformation area; respectively constructing a head car and an intermediate car of train equivalentmold shrinkage based on the scale factor of the dynamic parameters; According to the deformation energy absorption characteristics of the connecting couplers between the adjacent carriages on the full-size train, constructing energy absorption guide pieces between the adjacent carriages on the train equivalent shrinkage mold, and calculating the length of the honeycomb aluminum cylinder based onthe size scale factor; And calculating the sectional area of the energy absorption guide piece according to the structural size of the connecting coupler and the deformation energy absorption characteristic curve. The built head train shrinkage mold can ensure that the train impact force and the train body rigidity are similar, the train collision process is accurately restored, and the reliability is higher.

Description

technical field [0001] The invention belongs to the technical field of vehicles, and in particular relates to a method for constructing an equivalent reduced model of a train and an equivalent reduced model of a train. Background technique [0002] The heavy casualties caused by the train collision accident are shocking. Different from single-body collisions of vehicles, ships, etc., trains are composed of multi-section vehicles, with high mass and high speed, and the impact kinetic energy is much higher than that of automobile collisions. During the train collision process, there are not only the impact damage of a single car, but also the coupling and mutual collision between vehicles. Due to the coupling effect between vehicles during collision, the evolution process of collision behavior is complex and changeable. It is difficult to accurately simulate the complex dynamic response of the nonlinear system composed of train-line-operating environment by using numerical ca...

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Problems solved by technology

However, the scaled car body is made of a mass block whose strength is higher than that of the energy-absorbing structure, resulting in a change in the center of gravity of the train and an excessive mass of the scaled car body, making it difficult to meet the scaling criteria; and the mass block car body is thinner than the original car body The wall structure increases the rigidity of the train, and the internal structure of the scaled car body is quite different from the actual train, which cannot guarantee the similarity of the car body stiffness, which will easily lead to inconsistent dynamic response laws of the car body, and it is difficult to accurately simulate the dynamic response of the train collision and cannot be truly restored The collision process of the train; in addition, the similarity of the appearance of the car body is not considered, the appearance of the scaled car body is quite different from the original car body, and the obtained reduced model needs to be further improved

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