Dynamic load simulation device for high-speed railway

Abstract

The invention relates to a dynamic load simulation device for a high-speed railway, which comprises a reaction frame (1), an actuator (2) and a rigid distribution beam (3). The reaction frame (1) comprises a reaction frame base (4), a reaction frame column (5), a reaction frame crossbeam (6) and a reaction frame bracing rod (7). The dynamic load simulation device is characterized in that the reaction frame column (5) is connected with the reaction frame base (4) through an anchor bolt (8) of the column, the reaction frame crossbeam (6) is connected with the reaction frame column (5) through a hexagonal bolt (9) of the column, the two ends of the reaction frame bracing rod (7) are respectively butt-welded with the reaction frame crossbeam (6) and the reaction frame column (5) through steel plates, the upper part of the actuator (2) is connected with the reaction frame crossbeam (6) through bolts, the lower part of the actuator (2) is connected with the rigid distribution beam (3) through bolts, the rigid distribution beam (3) is arranged vertically and symmetrically on two rows of short steel rails (10), the short steel rails (10) are buckled on buckle points (11), and the buckle points (11) are buried in a track slab (12) laid on a roadbed (13). The dynamic load simulation device has a reasonable structure and can be operated conveniently, and the dynamic load of trains of different speeds and different axle loads on the track slab can be simulated.

Description

technical field [0001] The invention relates to a high-speed railway dynamic load simulation device. Background technique [0002] At present, my country's railway construction is developing by leaps and bounds, and a number of passenger dedicated lines and high-speed railways are under construction. With the increase of train speed, the dynamic problems of engineering structures are becoming more and more prominent. However, the dynamic design of high-speed railway has not yet formed a systematic theoretical system, and the existing design methods can no longer meet the needs of the rapid development of high-speed railway. Aiming at the key issues of structural dynamics of high-speed railway engineering, model tests are carried out on the dynamics of high-speed train-track-subgrade system, and indoor model tests and field test standards for dynamic performance of high-speed railway foundations are proposed, which will contribute to the formation of my country's high-speed r...

AI Technical Summary

Problems solved by technology

Due to the small size of the model and the strong influence of boundary conditions, the train load is basically realized by acting on the rail through a single-point exciter. The disadvantage is that the train load is a moving load running along the line, and the wheel set , the action time is very short, which is equivalent to applying an impact load to a certain point, which is simulated by a continuous sine function, which is quite different from the actual situation; the wheelset running on the rail is a continuous load that changes with the length of the rail. Simulating with a single-point vibrator can only simulate the loading of a certain point of the roadbed, and cannot reflect the dynamic response characteristics of a certain section of the roadbed; and the simulation of single-wheel or single-axis loading cannot take into account the different wheel sets of adjacent bogies in adjacent carriages The superimposition effect of dynamic loads between them is quite different from the real railway dynamic load, so it cannot accurately reflect the main dynamic response characteristics of the railway prototype subgrade, especially the dynamic response characteristics of the fast high-speed railway subgrade

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