CN112082780A

CN112082780A - Test section device for high-speed train bridge uplink train system under earthquake action

Info

Publication number: CN112082780A
Application number: CN201910505402.XA
Authority: CN
Inventors: 国巍; 余志武; 蒋丽忠; 龙岩; 刘汉云
Original assignee: Central South University
Current assignee: Central South University
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-12-15
Anticipated expiration: 2039-06-12
Also published as: CN112082780B

Abstract

The invention discloses a test section device for a high-speed train bridge uplink train system under the action of earthquake. And combining the characteristics of the existing 4 array systems of the vibration table, selecting a geometric scaling ratio of 1: and 10, similarly designing a bridge system and a track system, and in the driving safety test of the high-speed train on the bridge under the action of an earthquake, enabling the model train running at a high speed to pass through a reduced-scale model bridge and a track system on the upper part of the earthquake simulation vibration table array test section. The connection fastener is arranged in the reduced scale model track system, and millimeter-scale accurate regulation and control on the reduced scale model track can be realized by adjusting the fastening bolt on the connection fastener; and semi-T-shaped hook guide rails for preventing the train model from falling are laid on two sides of the train track. The whole test section device provides a safe and reliable train test scheme and technical guarantee for the study of the driving test on the high-speed train bridge under the action of the earthquake.

Description

Test section device for high-speed train bridge uplink train system under earthquake action

Technical Field

The invention relates to a model train testing device, in particular to a testing test section device for a high-speed train bridge ascending train system under the action of earthquake.

Background

By 2018, the railway operation mileage in China reaches 13.1 kilometers, wherein 2.9 kilometers of high-speed rails account for 66.3 percent of the total mileage of the high-speed rails in the world, and the high-speed rails stably live in the first place in the world. However, the construction and operation of high-speed railways in China also face many challenges and dangers, such as complicated geology, variable climate, prominent durability and behaviors over time, and the dynamic action of wind, earthquake and the like brings dangers to the construction and operation of high-speed railways, wherein the potential danger of strong earthquake action is worth paying attention. China is located in the Pacific earthquake zone of the Pacific, and belongs to the countries with multiple earthquakes. The high-speed railway inevitably spans an earthquake zone or is built along the earthquake zone, so that the running probability of the high-speed train line is greatly increased when an earthquake occurs, and the research on the running safety of the high-speed railway train under the action of the earthquake is very necessary.

In practice, however, the importance of laboratory testing has been highlighted by the difficulty in planning when and how precious data of the vehicle is measured by actual jolts due to unpredictability of the earthquake and testing difficulties. The research of the driving test on the high-speed train bridge under the earthquake has a plurality of difficulties, wherein the test of the model train has a plurality of technical difficulties. (1) How to conduct a train simulation of a high-speed train based on the equipment conditions of the vibrating table in a limited laboratory site? The earthquake simulation test is limited to the condition of the vibrating table equipment and can only be realized through a reduced-scale model test, and the running simulation of a large batch of trains at the present stage is a full-scale test, which has certain contradiction. If a test for simulating the driving safety on a high-speed railway bridge under an earthquake needs to be carried out, the test is necessarily a model test, which puts requirements on the driving simulation of a train.

(2) How to ensure safe and stable operation of the model train in the test and experiment process without the occurrence of overturning phenomenon? The track plate and the base plate can have important influence on driving safety, and especially play a vital role in connection between the track plate and the base plate and between the track plate and the base plate under an earthquake. Meanwhile, the test model train is small in scale ratio and high in manufacturing precision requirement, and various sensors are usually required to be arranged in the model train, so that the manufacturing of the model train is time-consuming and costly, unnecessary economic loss can be caused if the model train is damaged in the test process, the test process can be delayed, and the problem that the safe and stable operation of the manufactured fine test model train in the test process needs to be solved is ensured.

Based on the above, the invention provides a test section device for the test of the high-speed train bridge traveling system under the action of earthquake, which can solve the two problems. The device relies on 4 platform array system constructions of china and south university's shaking table, considers the equipment performance parameter of shaking table self, like mesa size, the biggest heavy burden of mesa, maximum driving speed etc. adopt 1: the scaling ratio of 10, the similarity ratio of the acceleration section is selected to be 1, the similarity ratio of the elastic modulus is selected to be 0.5, the prototype vehicle adopts CRH380A, the mass of the model vehicle is calculated to be about 500kg at the moment, the speed is about 20m/s, and similar design is carried out on the bridge driving model test under the earthquake. The test section device comprises shaking table array system, reduced scale model bridge system, reduced scale model track system etc. and the reduced scale model has higher requirement to the preparation precision, especially track irregularity part, and the corresponding model often is at 0.1mm rank, sets up the track connection fastener in the reduced scale model track system, through adjusting the fastening bolt on the connection fastener, realizes the accurate regulation and control of the orbital millimeter level of reduced scale model. And meanwhile, a semi-T-shaped hook guide rail is paved on a track board of the reduced scale model track system and used for guiding the train track of the train model driving route and preventing the train model from falling. The test device can provide powerful test schemes and technical guarantees for the model train test stage of high-speed train axle uplink safety related test research under the action of earthquake.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a test section device for a high-speed train-axle ascending system under the action of earthquake, which can provide technical support for a test model train test for the relevant test research of driving safety on the high-speed train axle under the action of earthquake.

In order to achieve the technical purpose, the technical scheme of the invention is as follows: the device for testing the high-speed train bridge uplink system under the action of earthquake comprises a vibration table array system, a reduced scale model bridge system, a reduced scale model track system and the like. The whole test device provides a safe and reliable train test scheme and technical guarantee for the study of the driving test on the high-speed train bridge under the action of the earthquake.

The invention also lies in that, combining the characteristics of the existing 4-array system of the vibration table, 2 piers are arranged on the table surface of each vibration table, and the geometric scaling ratio is selected to be 1: and 10, similarly designing a bridge system and a track system.

The invention also provides that the table top of the array system is provided with a movable clamp support for controlling the position of the table top in the trial acceleration test. In the running safety test on the high-speed train bridge under the action of earthquake, before a model train running at high speed passes through an earthquake simulation vibration table array test section, in order to ensure that the final dynamic test is completed smoothly, a test system in a test preparation stage is matched with an acceleration system and a deceleration system to carry out a model car test acceleration test, a table board of the table array system is provided with a movable clamp support, and at the moment, the table array system is in a middle position. After the test acceleration is successful and before the test is prepared, the control system acquires the current table top position information, the table top position control is connected in parallel, the movable support is withdrawn, and the test is prepared.

The invention also discloses that the movable clamp support is lifted by four lifters driven by two motors, the stroke is 200mm, and the movable clamp support can be finely adjusted by a hand wheel, so that the position of the table top can be controlled.

The invention also lies in that the length of the prototype bridge is 32 meters, and the bridge system is divided into two parts according to the geometric scale ratio of 1: 10, the bottom of the bridge model is provided with a support frame component for supporting the bridge model and adjusting the inclination angle and the horizontal position of the bridge model, and a track plate is paved on the bridge surface of the bridge model.

The invention also consists in that the rail system is likewise divided into 1: 10, the reduced scale model has higher requirements on the manufacturing precision, particularly the uneven part of the track, the corresponding model is usually in the grade of 0.1mm, and at the moment, some adjusting devices are required to be arranged between the lower support and the track to realize the precision fine adjustment of the track and to be tested and determined before the test.

The invention also provides that the track irregularity adjusting device of the reduced scale model track system is arranged as a track connecting fastener, and millimeter-scale accurate regulation and control of the reduced scale model track is realized by adjusting the fastening bolt on the connecting fastener.

The invention also lies in that a train track for guiding the train model running line and a half T-shaped hook guide rail for preventing the train model from falling are paved on the track plate of the reduced scale model track system, and the train track and the half T-shaped hook guide rail are parallel to each other and are distributed on two sides of the train track.

The beneficial effects of the invention are as follows:

(1) and (5) testing safety and stability. The invention adopts the following steps: the geometric scale of 10 compares bridge system and track system and carries out similar design to at the train track outside parallel arrangement half T type couple guide rail of scale model track system, thereby ensure that the model train can carry out safe and stable test at the experimentation.

(2) The millimeter level is adjustable. The reduced scale model has higher requirements on the manufacturing precision, particularly for the unsmooth part of the track, the corresponding model is usually in the grade of 0.1mm, at the moment, some adjusting devices are required to be arranged between the lower support and the track to realize the precision fine adjustment of the track, and the track is tested and determined before the experiment. The invention designs a millimeter-level adjustable design idea: the connection fastener that sets up in the scale model track system is used for adjusting the track irregularity, and fastening bolt through adjusting the connection fastener and subtracting can realize the accurate regulation and control of the orbital millimeter level of scale model.

The invention is further described with reference to the following figures.

Drawings

FIG. 1 is a schematic view of an overall overview of an on-bridge test system;

FIG. 2 is a schematic view of a test trial;

FIG. 3 is an exploded view of a test trial;

FIG. 4 is a detailed view of a vibration table array system;

FIG. 5 is a detailed view of a scaled model bridge system;

FIG. 6 is a detailed view of a scale model rail system;

FIG. 7 is a detail view of a single stand;

FIG. 8 is a detail of a single vibration table;

the system comprises a vibration table array system 1, a vibration table, a movable clamp support 102 and a support frame assembly 103, wherein the vibration table array system comprises a vibration table 101, the movable clamp support 102 and the support frame assembly 103; 2, a reduced scale model bridge system, which comprises 201 connecting beams, 202 reduced scale model piers and 203 reduced scale model bridge bodies; 3 is a model train; 4 is scale model track system, including 401 track board, 402 connection fastener, 403 train track, 404 half T type couple guide rail, 405 reservation bolt hole.

Detailed Description

The following further describes the present invention without limiting the content of the present invention.

Fig. 1 is a general overview sketch of a bridge-on-train test system, fig. 2 is a test section overview, only including a test section, in a high-speed train bridge-on-train driving safety test under the action of earthquake, a model train running at a high speed passes through a reduced scale model bridge and a track system on the upper part of a seismic simulation shaking table array test section, and the whole reduced scale model adopts 1: 10, performing similar design on the geometric scale ratio, and realizing millimeter-scale accurate regulation and control on the irregularity of the track by arranging a track connecting fastener on a scale model track system; and a semi-T-shaped hook guide rail is arranged, so that the anti-overturning safety and stability test of the model train is realized. Fig. 3 is an explosion diagram of a test section, and it can be seen from fig. 2 and 3 that the device for the test section of the high-speed train bridge uplink train system under the action of the whole earthquake mainly comprises a vibration table array system 1, a reduced scale model bridge system 2, a reduced scale model track system 3 and the like. Shaking table array system 1 contains four shaking tables 101, and every shaking table below has still arranged four portable anchor clamps and has supported 102 except that the outer supporting surface of actuator, and it can have motor drive lift to go up and down, forms 200mm to there is the hand wheel to finely tune, with control mesa position. The bottom of a reduced scale model pier 202 of the reduced scale model bridge system 2 is provided with a connecting beam assembly 201 for supporting a bridge model and adjusting the inclination angle and the horizontal position of the bridge model, a bridge body 203 of the bridge model is spliced in a segmented mode, and a reduced scale model track system 4 is laid on the upper portion of the bridge body. Bed plate 401 among the scale model rail system, track board 402, train track 404 and half T type couple guide rail 405 all adopt the segmentation concatenation, train track 404 and half T type couple guide rail 405 and track board 402 are close to, rail coupling fastener 403 is through adjusting the millimeter level irregularity of the accurate regulation and control train track 404 of fastening bolt in reserving bolt hole 406, half T type couple guide rail 405 parallel train track 404 sets up in the outside simultaneously, can play the guard action of preventing toppling to test model train. The test section device for the high-speed train bridge uplink train system under the earthquake action has the characteristics of safe and stable test, millimeter-scale adjustability and the like, and can provide technical support of a model train test for the high-speed train driving safety related test research under the earthquake action.

Claims

1. The device for testing the high-speed train bridge uplink train system under the action of earthquake comprises a vibration table array system, a reduced scale model bridge system, a reduced scale model track system and the like, wherein a geometric reduced scale ratio is selected to be 1: and 10, similarly designing a bridge system and a track system, and in the driving safety test of the high-speed train on the bridge under the action of an earthquake, enabling the model train running at a high speed to pass through a reduced-scale model bridge and a track system on the upper part of the earthquake simulation vibration table array test section. The whole test device provides a safe and reliable train acceleration scheme and technical guarantee for the study of the driving test on the high-speed train bridge under the action of the earthquake.

2. The device for testing the high-speed train bridge uplink system under the action of the earthquake according to claim 1, wherein: the characteristics of 4 platform array systems of current shaking table are combined, arrange 2 piers on every shaking table mesa, select the geometric scaling ratio to be 1: and 10, similarly designing a bridge system and a track system.

3. The device for testing the high-speed train bridge uplink system under the action of the earthquake according to claim 1, wherein: the table board of the array system is provided with a movable clamp support for controlling the position of the table board in a trial acceleration test. In the running safety test on the high-speed train bridge under the action of earthquake, before a model train running at high speed passes through an earthquake simulation vibration table array test section, in order to ensure that the final dynamic test is successfully completed, a test system in a test preparation stage is matched with an acceleration system and a deceleration system to carry out a model car test acceleration test, a table board of the table array system is provided with a movable clamp support, and at the moment, the table array system is in a middle position. After the test acceleration is successful and before the test is prepared, the control system acquires the current table top position information, the table top position control is connected in parallel, the movable support is withdrawn, and the test is prepared.

4. The device for testing the high-speed train bridge uplink system under the action of the earthquake according to the claims 1 and 3, is characterized in that: the movable fixture support is driven by two motors to lift four lifters, the stroke is 200mm, and a hand wheel can be used for fine adjustment, so that the position of the table top can be controlled.

5. The device for testing the high-speed train bridge uplink system under the action of the earthquake according to claim 1, wherein: the length of the prototype bridge is 32 meters, and the bridge system is divided into 1: 10, the bottom of the bridge model is provided with a support frame component for supporting the bridge model and adjusting the inclination angle and the horizontal position of the bridge model, and a track plate is paved on the bridge floor of the bridge model.

6. The device for testing the high-speed train bridge uplink system under the action of the earthquake according to the claims 1 and 5, is characterized in that: the track system is also described by 1: the scale of 10 is designed in a similar scale, a scale model has higher requirements on manufacturing accuracy, particularly the uneven part of the track is usually in the grade of 0.1mm corresponding to the model, and at the moment, some adjusting devices are required to be arranged between the lower support and the track to realize the precision fine adjustment of the track and to be tested and determined before the test.

7. The device for testing the high-speed train bridge uplink system under the action of the earthquake according to the claims 1, 5 and 6, is characterized in that: the track irregularity adjusting device of the reduced scale model track system is arranged as a track connecting fastener, and the millimeter-scale accurate regulation and control of the reduced scale model track is realized by adjusting the fastening bolt on the connecting fastener.

8. The device for testing the high-speed train bridge uplink system under the action of the earthquake according to the claims 1, 5 and 6, is characterized in that: the track plate of the reduced scale model track system is paved with a train track for guiding a train model traveling line and a half T-shaped hook guide rail for preventing the train model from falling, and the train track and the half T-shaped hook guide rail are parallel to each other and distributed on two sides of the train track.