Train loading simulation device for bridge model test

Abstract

The invention discloses a train loading simulation device for a bridge model test, the train loading simulation device comprises a bridge model system and a train loading system; the bridge model system comprises a pier and a model beam mounted on the pier, and a track plates and steel rails are arranged on the surface of the model beam; the train loading system comprises a train model and a guiderail; the guide rail is a screw with external threads, is located above the model beam and is arranged along the longitudinal direction of the model beam; and a driving structure is arranged in the train model, the driving structure comprises a driving rotor core and a motor, the driving rotor core is sleeved on the outer side of the guide rail, and internal threads matching the external threadsof the guide rail are arranged on an inner surface of the driving rotor core. The train loading simulation device disclosed by the invention has the advantages of realizing indoor model simulation ofbridge crossing of a train, accurately controlling the starting and braking of the operation of the train, and realizing movement of a variety of vehicle speeds so as to study the influence of the running speed of the train on the bridge vibration; and in addition, the train weight can be changed to study the influence of the axle load of the train on the bridge vibration.

Description

technical field [0001] The invention belongs to bridge model test devices, in particular to a train loading simulation device used for bridge model tests. Background technique [0002] As a key part of urban rail transit, elevated track bridges are in the stage of rapid construction. People put forward higher requirements for the impact of train operation on the vibration and noise levels of the surrounding environment. The unevenness of the track aggravates the impact of the moving load of the train on the bridge and the surrounding environment. At present, there are three main researches on vehicle-induced vibration of viaducts: numerical simulation, model test, and field test. The accuracy of numerical simulation is not high, and it is difficult to reflect the real operation status of the bridge; the field test is complex and difficult to control, and has high requirements for detection equipment; The patent (CN201520871541) simulates the movement of subway trains, but...

AI Technical Summary

Problems solved by technology

The accuracy of numerical simulation is not high, and it is difficult to reflect the real operation status of the bridge; the field test is complex and difficult to control, and has high requirements for detection equipment; The patent (CN201520871541) simulates the movement of subway trains, but the method of traction line traction cannot effectively and accurately control the starting and braking of trains, and the train running speed cannot be controlled, that is, it is impossible to study the influence of train running speed on bridge vibration

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