In-situ modeling test system for live loading of high-speed railway

Abstract

The invention relates to a high-speed railway live-loading field analog experiment system, comprising: a frequency control motor (7) is fixedly arranged on a mounting trolley (8) of the motor, the shaft of the motor (7) is connected with the input shaft at one side of a speed increaser (2) by a universal coupler (3); the front and rear output shafts (21, 22) with the same height at the other side of the speed increaser (2) are connected with same eccentric blocks (4), and the rotating speed of the front and rear output shafts (21, 22) is same, the rotating direction thereof is reverse; the speed increaser (2) is fixed in the center of the upper surface of a vibrating grid (1). The exciting force of the system is strong, excited frequency thereof is high, the reliability is high, and installation and debugging are convenient; therefore, the system is particularly suitable for the high-speed railway live-loading field analog experiments.

Description

technical field [0001] The invention relates to a high-speed railway dynamic load field simulation test system. Background technique [0002] At present, my country's high-speed railway construction has entered a period of great development. The high-speed railway runs at a high speed, which puts forward high standards for the dynamic performance and long-term performance of its line structures such as roadbeds, bridges, tunnels, and pile foundations. Before the line structure is put into operation, it is necessary to conduct on-site dynamic tests on the structure under the action of dynamic load through the dynamic load field simulation test device to obtain technical parameters, test the sinking characteristics of the line, clarify its dynamic performance, and investigate the structure under the action of dynamic load. Whether Shen conforms to the maintenance mode of the high-speed railway, etc., to ensure the safe operation of the high-speed railway. The existing dynami...

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Problems solved by technology

Its shortcomings are: the vibrating part is directly connected with the motor, and the motor also vibrates together during the test, which greatly affects the life of the motor and the reliability of the system is poor; Due to the limitation of the power of the motor and the insufficient excitation force, there is a large difference from the real dynamic load of the railway, and its excitation frequency is low, which cannot meet the needs of the dynamic test of the railway prototype, especially for high-speed railways with fast speed and large dynamic load. , the existing dynamic load field simulation test system is even more difficult to adapt to

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