Earthquake-induced high-speed train derailment whole process state test simulation system

Abstract

The invention discloses an earthquake-induced high-speed train derailment whole process state test simulation system. A vehicle-track-lower foundation structure model comprises a lower foundation structure model, a track system model and a vehicle model; the acceleration system is located at one end of the track system model; the braking system is located at the other end of the track system model; the earthquake simulation device is connected to the lower foundation structure model; the monitoring system comprises a vehicle-mounted monitoring subsystem and a trackside monitoring subsystem. And the data acquisition system is used for acquiring and processing monitoring data of the monitoring system. The method is used for solving the problem that in the prior art, accurate reproduction of the whole derailment process of the high-speed train under the earthquake condition and effective assessment of the damage of the post-earthquake track structure system cannot be achieved, and the purposes of accurate reproduction of the whole derailment process of the high-speed train induced by the earthquake and effective assessment of the damage of the post-earthquake track structure system are achieved.

Description

Technical Field

[0001] The invention relates to the field of high-speed train operation safety, and in particular to a whole-process state test simulation system for earthquake-induced high-speed train derailment. Background Art

[0002] my country's high-speed rail operating backbone network has basically been formed. How to scientifically maintain the high-speed rail operating lines so that they can maintain high safety, high stability and high reliability in operation over the long term is a major challenge facing high-speed rail at this stage.

[0003] Accidents of high-speed train derailment induced by earthquakes occur frequently at home and abroad. After the high-speed train derails, the wheels get rid of the rail constraints and collide violently with the ballastless track plate. Since earthquake-induced high-speed train derailment is random, high-risk and non-repeatable, there is still a lack of accurate reproduction of the whole process of earthquake-induced high-speed train derailment and the damage state assessment device and method of the track structure system in the prior art. In the prior art, most of the indoor test platforms are used to carry out the study of the mechanism of high-speed train derailment. The existing indoor vehicle model derailment test platform is mainly limited to the derailment research under the extreme environment of wheelset-rolling platform, single bogie low-speed derailment platform, and quasi-static extreme environment (earthquake, crosswind, etc.), and it is impossible to realize the scientific simulation of the whole process of high-speed derailment of trains under earthquakes and complex track lines, which is insufficient in larger-scale and longer tests.

[0004] Moreover, since the ballastless track is a multi-layer structural system, the inter-layer bonding and limiting structures are weak and hidden structures; the impact of the high-speed impact after the train derailment on the inter-layer bonding and limiting structures is difficult to detect through on-site inspection, so the existing test platform is unable to evaluate the overall performance damage of the track structure system after the earthquake and derailment, and is unable to grasp the post-earthquake mechanical properties and service status of the hidden structure. Summary of the invention

[0005] The present invention provides a whole process state test simulation system of earthquake-induced high-speed train derailment, so as to solve the problem that the whole process of high-speed train derailment under earthquake conditions cannot be accurately reproduced and the damage of track structure system after earthquake cannot be effectively evaluated in the prior art, so as to achieve the purpose of accurately reproducing the whole process of high-speed train derailment induced by earthquake and effectively evaluating the damage of track structure system after earthquake.

[0006] The present invention is achieved through the following technical solutions:

[0007] The whole process state test simulation system of earthquake-induced high-speed train derailment includes:

[0008] Vehicle-track-substructure model: including a substructure model, a track system model located on the substructure model, and a vehicle model located on the track system model;

[0009] Acceleration system: located at one end of the track system model, used to accelerate the vehicle model;

[0010] Braking system: located at the other end of the track system model, used for braking the vehicle model;

[0011] An earthquake simulation device: connected to the lower foundation structure model, used to simulate earthquake vibration;

[0012] Monitoring system: including an on-board monitoring subsystem for monitoring the relative position relationship between the vehicle model and the track system model, and a trackside monitoring subsystem for monitoring the track system model and / or the lower infrastructure model;

[0013] Data acquisition system: used to collect and process the monitoring data of the monitoring system.

[0014] Aiming at the problem that the prior art cannot accurately reproduce the whole process of high-speed train derailment under earthquake conditions and effectively evaluate the damage of track structure system after earthquake, the present invention proposes a whole process state test simulation system of earthquake-induced high-speed train derailment. The system first needs to construct a vehicle-track-lower foundation structure model, which includes a lower foundation structure model, a track system model is set on the lower foundation structure model, and a vehicle model is installed on the track system model; the aforementioned models can all adopt scaled models to reduce the test cost.

[0015] The present application sets an acceleration system and a braking system at both ends of the track system model; the acceleration system can use any existing driving method to accelerate the vehicle model so that the vehicle model can obtain the required simulated high-speed running state as soon as possible; the braking system is used to brake the vehicle model after the test to prevent it from leaving the test area. The present application simulates the required seismic vibrations through a seismic simulation device, and then simulates the running state of the high-speed train under different seismic vibrations; the seismic simulation device can be implemented by any existing technology. All data collected by the monitoring system are transmitted to the data acquisition system, which monitors and processes them and outputs the processing results.

[0016] The present application, when used specifically, first establishes a vehicle-track-lower infrastructure model, accelerates the vehicle model by an acceleration system, starts an earthquake simulation device when the vehicle model reaches a set speed, simulates a specified earthquake vibration, observes train operation and derailment, and monitors the relative position relationship between the vehicle model and the track system model in real time by an on-board monitoring subsystem, thereby realizing accurate reproduction of the whole process of high-speed train derailment induced by earthquake, and being able to obtain the real-time relative change state between the vehicle and the track during the derailment process. In addition, during the derailment test and after the test, the mechanical properties, structural changes and other data of the track system model and / or the lower infrastructure model are obtained by the trackside monitoring subsystem, thereby being able to realize effective evaluation of the damage of the track structure system after the earthquake, thereby overcoming the problem that the prior art cannot grasp the mechanical properties and service status of the interlayer concealed structure of the ballastless track after the earthquake.

[0017] Furthermore, the lower infrastructure model includes a plurality of assembly sub-models connected in sequence, and adjacent assembly sub-models are detachably connected.

[0018] The lower infrastructure model in this solution adopts an assembled structure and is divided into different assembly sub-models. During the field test, the different assembly sub-models are spliced ​​in sequence to obtain the required lower infrastructure model. This assembled structure can simulate different sub-rail infrastructures according to specific test needs, and then simulate the different states of high-speed trains encountering sudden earthquakes while running on different sub-rail foundations, thereby significantly improving the versatility of this application and expanding the scope of application. The assembly sub-model in this solution can adopt any existing sub-rail infrastructure, which can be obtained after scaling down based on a specified ratio.

[0019] Further, the sub-model includes a scaled roadbed model and / or a scaled bridge model;

[0020] The scaled roadbed model includes a subgrade surface layer, a subgrade bottom layer and a foundation which are sequentially distributed from top to bottom;

[0021] The scaled bridge model includes a bridge plate, a pier support and a pier which are distributed in sequence from top to bottom.

[0022] Furthermore, the track system model includes a base plate, an interlayer limiting structure and a self-compacting concrete layer located on the base plate, a track plate located on the self-compacting concrete layer, and a scaled rail installed on the track plate.

[0023] The interlayer limiting structure can be obtained by scaling down the existing technology in equal proportions.

[0024] Furthermore, the vehicle model includes a scaled vehicle body, and a plurality of wheelsets and bogies located at the bottom of the scaled vehicle body; the wheelsets and bogies are matched with the scaled rails.

[0025] Furthermore, the acceleration system includes a driving device for providing power to the vehicle model; the output end of the driving device is connected to the vehicle model via a pull rod; and also includes an unlocking mechanism for releasing the connection between the pull rod and the vehicle model.

[0026] In this solution, the driving device drives the vehicle model to move through the pull rod to complete rapid acceleration within a short distance. Then, when the vehicle model reaches the set speed or reaches the set position, the unlocking mechanism works to release the connection between the pull rod and the vehicle model, allowing the vehicle model to move forward under inertia while being affected by simulated earthquake vibrations.

[0027] Furthermore, the braking system includes an elastic buffer mechanism and a hydraulic buffer mechanism; the hydraulic buffer mechanism is located on a side of the elastic buffer mechanism away from a direction where the acceleration system is located.

[0028] This scheme adopts a two-stage buffer technology, so that the vehicle model under the action of earthquake is first decelerated by the elastic buffer mechanism and then braked by the hydraulic buffer mechanism. Compared with the braking method that relies solely on one buffer mechanism, this scheme can achieve rapid braking of the high-speed running vehicle model in an extremely short distance, thereby reducing the length of the track system model, thereby reducing the test cost and improving the test efficiency.

[0029] Those skilled in the art should understand that the elastic buffer mechanism refers to a buffer mechanism that converts the kinetic energy of the vehicle model into the elastic potential energy of the elastic body for consumption, and the hydraulic buffer mechanism refers to a buffer mechanism that converts the kinetic energy of the vehicle model into hydraulic energy for consumption.

[0030] Furthermore, the vehicle-mounted monitoring subsystem includes a plurality of vehicle-mounted high-speed cameras, and the shooting direction of the vehicle-mounted high-speed cameras is toward the contact area between the vehicle model and the track system model;

[0031] The trackside monitoring subsystem includes a post-earthquake track structure external damage detection device, a post-earthquake track structure hidden disease damage detection device and a track structure mechanical property testing device;

[0032] The post-earthquake track structure external damage detection device is used to detect crack data of the track system model and / or the lower infrastructure model; the post-earthquake track structure hidden disease damage detection device is used to detect hidden disease data of the track system model and / or the lower infrastructure model; the track structure mechanical property testing device is used to obtain the mechanical property data of the track system model in real time.

[0033] Furthermore, it also includes a sliding bracket mounted on the track system model, wherein the sliding direction of the sliding bracket is parallel to the extension direction of the track system model;

[0034] The post-earthquake track structure external damage detection device is an ultrasonic monitoring device installed on the sliding bracket;

[0035] The post-earthquake track structure hidden disease damage detection device is an infrared thermal imaging device installed on the sliding bracket;

[0036] The track structure mechanical property testing device is a distributed optical fiber pre-buried in the track system model.

[0037] Furthermore, it also includes safety protection devices located on both sides of the track system model, which are used to prevent the derailed vehicle model from being completely out of control and out of the test area, and at the same time protect the derailed vehicle model.

[0038] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0039] 1. The earthquake-induced high-speed train derailment whole process state test simulation system of the present invention can observe the train operation and derailment situation, and monitor the relative position relationship between the vehicle model and the track system model in real time, so as to achieve accurate reproduction of the earthquake-induced high-speed train derailment whole process, and can obtain the real-time relative change state between the vehicle and the track during the derailment process.

[0040] 2. The earthquake-induced high-speed train derailment whole process state test simulation system of the present invention can obtain data such as mechanical properties and structural changes of the track system model and / or the lower foundation structure model, and then can realize effective evaluation of the damage of the track structure system after the earthquake, thereby overcoming the problem that the prior art cannot grasp the post-earthquake mechanical properties and service status of the interlayer hidden structure of the ballastless track.

[0041] 3. The earthquake-induced high-speed train derailment whole process state test simulation system of the present invention can simulate the different states of a high-speed train after encountering a sudden earthquake while running on different track bases, thereby significantly improving the versatility of the present application and expanding the scope of application.

[0042] 4. The earthquake-induced high-speed train derailment whole process state test simulation system of the present invention adopts a two-stage buffer technology, which can achieve rapid braking of a high-speed running vehicle model in an extremely short distance, thereby reducing the length of the track system model, thereby reducing the test cost and improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0044] Figure 1 It is a longitudinal schematic diagram of a whole process state test simulation system in a specific embodiment of the present invention;

[0045] Figure 2 It is a partial schematic diagram of a vehicle-track-lower infrastructure model in a specific embodiment of the present invention;

[0046] Figure 3 It is a partial horizontal view of a specific embodiment of the present invention;

[0047] Figure 4 It is a schematic diagram of a vehicle-mounted monitoring subsystem in a specific embodiment of the present invention.

[0048] Marks and corresponding parts names in the attached drawings:

[0049] 5-scaled vehicle body; 6-driving device; 7-pull rod; 8-earthquake simulation device; 9-safety protection device; 10-base bracket; 11-hydraulic buffer mechanism; 12-elastic buffer mechanism; 13-scaled roadbed model; 14-scaled bridge model; 15-wheel set; 16-scaled rail; 17-track plate; 18-self-compacting concrete layer; 19-base plate; 20-interlayer limit structure; 21-bridge plate; 22-track structure mechanical properties testing device; 23-on-board high-speed camera; 24-steel frame structure; 25-track system model; 26-elastic buffer layer; 27-fixed bracket; 28-sliding bracket; 29-bridge pier; 30-post-earthquake track structure external damage detection device; 31-post-earthquake track structure hidden disease damage detection device. DETAILED DESCRIPTION

[0050] In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the examples and the accompanying drawings. The schematic embodiments of the present invention and the description thereof are only used to explain the present invention and are not intended to limit the present invention. In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application.

[0051] Embodiment 1:

[0052] like Figure 1The earthquake-induced high-speed train derailment whole process state test simulation system shown includes a vehicle-track-lower infrastructure model, an acceleration system, a braking system, an earthquake simulation device 8, a monitoring system and a data acquisition system.

[0053] The vehicle-track-lower infrastructure model includes: a lower infrastructure model, a track system model 25 located on the lower infrastructure model, and a vehicle model located on the track system model 25. The vehicle-track-lower infrastructure model in this embodiment is an outdoor model, which is cast in situ or assembled outdoors, and can overcome the limitations of traditional indoor models for derailment research.

[0054] The lower infrastructure model includes a plurality of assembly sub-models connected in sequence, and adjacent assembly sub-models are detachably connected.

[0055] The sub-model includes a scaled roadbed model 13 and / or a scaled bridge model 14;

[0056] The scaled roadbed model 13 includes a bed surface layer, a bed bottom layer and a foundation which are sequentially distributed from top to bottom;

[0057] The scaled bridge model 14 includes a bridge plate 21, a pier support and a pier 29 which are sequentially distributed from top to bottom.

[0058] Preferably, the geometric scale ratio of the lower infrastructure model is 1:10.

[0059] like Figure 1 and Figure 2 As shown, the track system model 25 in this embodiment includes a base plate 19, an interlayer limiting structure 20 and a self-compacting concrete layer 18 located on the base plate 19, a track plate 17 located on the self-compacting concrete layer 18, and a scaled rail 16 installed on the track plate 17. Depending on the type of sub-model used, the base plate 19 is cast on the subgrade surface layer or the bridge plate 21.

[0060] The vehicle model includes a scaled vehicle body 5 , and a plurality of wheelsets 15 and bogies located at the bottom of the scaled vehicle body 5 ; the wheelsets 15 and bogies are matched with the scaled rails 16 .

[0061] The acceleration system in this embodiment is located at one end of the track system model 25 and is used to accelerate the vehicle model. The acceleration system includes a drive device 6 for providing power to the vehicle model; the output end of the drive device 6 is connected to the vehicle model through a pull rod 7; and also includes an unlocking mechanism for releasing the connection between the pull rod 7 and the vehicle model. Preferably, the drive device 6 is implemented by an electromagnetic driver.

[0062] The braking system in this embodiment is located at the other end of the track system model 25 and is used to brake the vehicle model; the braking system includes an elastic buffer mechanism 12 and a hydraulic buffer mechanism 11; the hydraulic buffer mechanism 11 is located on the side of the elastic buffer mechanism 12 away from the direction of the acceleration system.

[0063] The earthquake simulation device 8 in this embodiment is connected under the lower foundation structure model and is used to simulate earthquake vibrations; it may include an elevation-adjustable seismic station and / or a multi-degree-of-freedom earthquake excitation generator, which is scalable and can adjust test parameters according to different earthquake intensities and frequencies to achieve larger-scale and longer-term earthquake vibration simulation.

[0064] The monitoring system in this embodiment includes an on-board monitoring subsystem for monitoring the relative position relationship between the vehicle model and the track system model 25, and a trackside monitoring subsystem for monitoring the track system model 25 and / or the lower infrastructure model.

[0065] like Figure 3 and Figure 4 As shown, the vehicle-mounted monitoring subsystem includes a plurality of vehicle-mounted high-speed cameras 23, and the shooting direction of the vehicle-mounted high-speed cameras 23 is toward the contact area between the vehicle model and the track system model 25; the trackside monitoring subsystem includes a post-earthquake track structure external damage detection device 30, a post-earthquake track structure hidden disease damage detection device 31 and a track structure mechanical property testing device 22.

[0066] The post-earthquake track structure external damage detection device 30 is used to detect crack data of the track system model 25 and / or the lower infrastructure model; the post-earthquake track structure hidden disease damage detection device 31 is used to detect hidden disease data of the track system model 25 and / or the lower infrastructure model; the track structure mechanical property testing device 22 is used to obtain the mechanical property data of the track system model 25 in real time.

[0067] This embodiment also includes a data acquisition system: it is used to collect and process the monitoring data of the monitoring system; the dynamic data can be analyzed, stored and outputted through the data acquisition system.

[0068] Preferably, Figure 4 As shown, the on-board high-speed camera 23 is connected to the wheel set 15 through a steel frame structure 24 to form a monitoring platform. The shooting angle of the on-board high-speed camera 23 needs to be able to clearly capture the wheel rim and rail head and other characteristic parts, so as to obtain the image information of the position relationship between the wheel and rail of the high-speed train under earthquake conditions, and calculate the relative position of the wheel and rail of the high-speed train based on machine vision technology.

[0069] Embodiment 2:

[0070] A whole process state test simulation system of earthquake-induced high-speed train derailment, based on embodiment 1, the driving device 6 in this embodiment can slide freely along the extension direction of the track under the track system model 25; when the driving device 6 is started, the driving device 6 moves and pulls the vehicle model to move through the pull rod 7. The pull rod 7 and the vehicle model can be connected in any controlled manner.

[0071] The unlocking mechanism in this embodiment can be unlocked by any of the following technical solutions:

[0072] Solution 1: A signal mark is set at a designated position on the track system model 25. When the vehicle model moves to the signal mark and recognizes the signal mark, the unlocking mechanism is controlled to start and release the connection between the pull rod 7 and the vehicle model.

[0073] Solution 2: A speed sensor is provided on the vehicle model. When the speed sensor detects that the real-time speed of the vehicle model reaches a set threshold, the unlocking mechanism is controlled to start, thereby releasing the connection between the pull rod 7 and the vehicle model.

[0074] Embodiment 3:

[0075] A whole process state test simulation system of earthquake-induced high-speed train derailment. Based on the first or second embodiment, this embodiment optimizes the braking system:

[0076] The elastic buffer mechanism 12 includes a first sliding plate and a second sliding plate which are slidably arranged along the extension direction of the track system model 25; wherein the first sliding plate faces the direction of the acceleration system, and the first sliding plate is located between the second sliding plate and the acceleration system; and a plurality of elastic bodies, such as springs, are arranged between the first sliding plate and the second sliding plate.

[0077] The hydraulic buffer mechanism 11 includes a third sliding plate and a fourth sliding plate which are slidably arranged along the extension direction of the track system model 25; wherein the third sliding plate faces the direction of the acceleration system, and the third sliding plate is located between the fourth sliding plate and the acceleration system; and a plurality of hydraulic energy-consuming devices, such as a hydraulic piston cylinder, are arranged between the third sliding plate and the fourth sliding plate.

[0078] In a more preferred embodiment, the second sliding plate and the third sliding plate may be combined into an integral structure.

[0079] In a more preferred embodiment, a base bracket 10 is also fixedly connected to an end of the fourth sliding plate away from the acceleration system, and the base bracket 10 is also fixed to the end of the track system model 25 .

[0080] This embodiment may also include safety protection devices 9 located on both sides of the track system model 25. Figure 3As shown, the safety protection device includes an elastic buffer layer 26 and a fixing bracket 27 located on both sides of the track system model 25 . The elastic buffer layer 26 is used to prevent damage caused by train derailment, and the fixing bracket 27 is used to fix the elastic buffer layer 26 .

[0081] More preferably, the fixed bracket 27 is a steel structure distributed on both sides of the track system model 25; the elastic buffer layer 26 maintains a certain distance from the scaled rail 16, which not only ensures that the high-speed vehicle model is truly derailed, but also protects the derailed vehicle model from rushing out of the test area.

[0082] Embodiment 4:

[0083] A whole process state test simulation system of earthquake-induced high-speed train derailment, based on any of the above embodiments, as Figure 3 As shown, it also includes a sliding bracket 28 mounted on the track system model 25, and the sliding direction of the sliding bracket 28 is parallel to the extension direction of the track system model 25;

[0084] The post-earthquake track structure external damage detection device 30 is an ultrasonic flaw detection device installed on the sliding bracket 28; it detects the width and depth of the track plate crack based on the ultrasonic method.

[0085] The post-earthquake track structure hidden disease damage detection device 31 is an infrared thermal imaging device installed on the sliding bracket 28, which is used to detect the location and size of hidden diseases.

[0086] The track structure mechanical property testing device 22 is a distributed optical fiber pre-buried in the track system model 25 .

[0087] In this embodiment, the sliding bracket 28 can slide freely along the track direction, and after the earthquake-induced derailment simulation is completed, it slowly slides along the track structure and simultaneously performs damage detection.

[0088] Embodiment 5:

[0089] A method for simulating the whole process of earthquake-induced high-speed train derailment state test is implemented based on the simulation system in any of the above embodiments, comprising the following steps:

[0090] S1. Build the simulation system in any of the above embodiments, prepare the vehicle-track-lower infrastructure model, and initialize the earthquake-induced high-speed train derailment whole process state test simulation system;

[0091] S2, start the driving device 6, so that the vehicle model is accelerated to a set speed by the acceleration system, and the vehicle model and the pull rod 7 are automatically unlocked; start the earthquake simulation device 8 to simulate the preset earthquake vibration;

[0092] S3, before the vehicle model is braked by the braking system, the vehicle-mounted monitoring subsystem and the track structure mechanical property testing device 22 obtain monitoring data in real time and transmit it to the data acquisition system;

[0093] After the vehicle model is braked by the braking system, the sliding bracket 28 is driven to move along the track system model 25. During this period, the post-earthquake track structure external damage detection device 30 and the post-earthquake track structure hidden disease damage detection device 31 are started to obtain the flaw detection data and transmit it to the data acquisition system.

[0094] In a more preferred embodiment, when building the simulation system in any of the above embodiments, it is necessary to first determine the vehicle-track-substructure model parameters, and the specific determination method is as follows:

[0095] Firstly, based on the vehicle-track coupling dynamics theory, the basic dimensions and similarity constants of all physical quantities that affect the train derailment characteristics are listed, as shown in Table 1:

[0096] Table 1 Basic dimensions and similarity constants of physical quantities affecting train derailment characteristics

[0097]

[0098] In Table 1, the physical quantity "time" is used as an example to illustrate that the symbol corresponding to the physical quantity "time" is t, the corresponding basic dimension is second s, and the corresponding similarity constant is λ t .

[0099] By using the dimensional analysis method and according to the Buckingham π theorem in similarity theory, a formula system of basic dimensions of physical quantities and similarity constants of the vehicle-track-substructure model characteristics is established; then based on the second similarity theorem, namely the Buckingham π theorem, the aforementioned formula system is transformed into a functional relationship between similarity criteria through similarity transformation:

[0100] f(π1,π2,π3,……π n-k )=0;

[0101] In the formula, π1, π2, π3...π n-k , is a dimensionless parameter formed by n physical quantities, which can be understood as the basic similarity criterion in similarity theory; k represents k dimensionally independent physical quantities, namely the so-called basic physical quantities in dimensional analysis. In this embodiment, n=12, k=3.

[0102] This embodiment adopts the [M][L][T] dimension system as the basic dimension (i.e., λ M , l , t As a basic physical quantity), and the powers of the relevant physical quantities are a1 to a 12, establish the dimensional relationship of the vehicle-track-substructure model, and obtain the π matrix of (nk) physical parameters as follows:

[0103]

[0104]

[0105] Based on the known laws, the functional relationship between different parameters can be obtained by the law analysis method. By substituting the above formula, the similarity constants of the substructure parameters of the actual vehicle-track-substructure and the vehicle-track-substructure model can be further obtained as follows:

[0106]

[0107]

[0108] In this embodiment, the model reduction size λ is determined l =1:10, acceleration λ a =1:1, density λ ρ =1:1, by substituting into the above formula, we can obtain the similarity ratios corresponding to the similarity constants as shown in Table 2:

[0109] Table 2 Similarity ratios corresponding to similarity constants

[0110]

[0111]

[0112] Those skilled in the art should understand that λ in this embodiment is set to 10.

[0113] After that, subsequent tests can be carried out according to the similarity ratio obtained in Table 2. For example, when preparing the vehicle-track-substructure model, the size, density, mass, moment of inertia, elastic modulus, stiffness and damping of the model are scaled according to the corresponding similarity ratio. The time, speed and acceleration of the vehicle model are controlled according to the corresponding similarity ratio. The earthquake simulation device 8 simulates the actual earthquake vibration with the similarity ratio corresponding to the vibration mode and frequency.

[0114] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0115] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, the term "connected" used in this article can be directly connected or indirectly connected via other components without special explanation.

Claims

1. Earthquake-induced high-speed train derailment whole process state test simulation system, characterized by: include: The vehicle-track-substructure model includes a substructure model, a track system model (25) located on the substructure model, and a vehicle model located on the track system model (25); An acceleration system: located at one end of the track system model (25), used to accelerate the vehicle model; A braking system: located at the other end of the track system model (25), used for braking the vehicle model; An earthquake simulation device (8) connected to the lower foundation structure model and used to simulate earthquake vibration; The monitoring system comprises an on-board monitoring subsystem for monitoring the relative position relationship between the vehicle model and the track system model (25), and a trackside monitoring subsystem for monitoring the track system model (25) and / or the lower infrastructure model; Data acquisition system: used to collect and process the monitoring data of the monitoring system.

2. The earthquake-induced high-speed train derailment whole process state test simulation system according to claim 1 is characterized in that: The lower infrastructure model comprises a plurality of assembly sub-models connected in sequence, and adjacent assembly sub-models are detachably connected.

3. The earthquake-induced high-speed train derailment whole process state test simulation system according to claim 2 is characterized in that: The sub-models include a scaled roadbed model (13) and / or a scaled bridge model (14); The scaled roadbed model (13) comprises a bed surface layer, a bed bottom layer and a foundation which are sequentially arranged from top to bottom; The scaled bridge model (14) comprises a bridge plate (21), a pier support and a pier (29) which are arranged in sequence from top to bottom.

4. The earthquake-induced high-speed train derailment whole process state test simulation system according to claim 1 is characterized in that: The track system model (25) comprises a base plate (19), an interlayer limiting structure (20) and a self-compacting concrete layer (18) located on the base plate (19), a track plate (17) located on the self-compacting concrete layer (18), and a scaled steel rail (16) installed on the track plate (17).

5. The earthquake-induced high-speed train derailment whole process state test simulation system according to claim 4 is characterized in that: The vehicle model comprises a scaled vehicle body (5), a plurality of groups of wheel sets (15) and bogies located at the bottom of the scaled vehicle body (5); the wheel sets (15) and bogies are matched with the scaled rails (16).

6. The earthquake-induced high-speed train derailment whole process state test simulation system according to claim 1 is characterized in that: The acceleration system comprises a driving device (6) for providing power to the vehicle model; an output end of the driving device (6) is connected to the vehicle model via a pull rod (7); and an unlocking mechanism is also included for releasing the connection between the pull rod (7) and the vehicle model.

7. The earthquake-induced high-speed train derailment whole process state test simulation system according to claim 1 is characterized in that: The braking system comprises an elastic buffer mechanism (12) and a hydraulic buffer mechanism (11); the hydraulic buffer mechanism (11) is located on a side of the elastic buffer mechanism (12) away from a direction where the acceleration system is located.

8. The earthquake-induced high-speed train derailment whole process state test simulation system according to claim 1 is characterized in that: The vehicle-mounted monitoring subsystem comprises a plurality of vehicle-mounted high-speed cameras (23), wherein the shooting direction of the vehicle-mounted high-speed cameras (23) is toward the contact area between the vehicle model and the track system model (25); The trackside monitoring subsystem comprises a post-earthquake track structure external damage detection device (30), a post-earthquake track structure hidden disease damage detection device (31) and a track structure mechanical property testing device (22); The post-earthquake track structure external damage detection device (30) is used to detect crack data of the track system model (25) and / or the lower foundation structure model; the post-earthquake track structure hidden disease damage detection device (31) is used to detect hidden disease data of the track system model (25) and / or the lower foundation structure model; The track structure mechanical property testing device (22) is used to obtain the mechanical property data of the track system model (25) in real time.

9. The earthquake-induced high-speed train derailment whole process state test simulation system according to claim 8, characterized in that: It also includes a sliding bracket (28) mounted on the track system model (25), wherein the sliding direction of the sliding bracket (28) is parallel to the extension direction of the track system model (25); The post-earthquake track structure external damage detection device (30) is an ultrasonic monitoring device installed on the sliding bracket (28); The post-earthquake track structure hidden disease and damage detection device (31) is an infrared thermal imaging device installed on the sliding bracket (28); The track structure mechanical property testing device (22) is a distributed optical fiber pre-buried in the track system model (25).

10. The earthquake-induced high-speed train derailment whole process state test simulation system according to claim 1, characterized in that: It also includes safety protection devices (9) located on both sides of the track system model (25).

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