Tracked vehicle damage testing device and evaluation method

Abstract

The invention discloses a tracked vehicle damage test device and evaluation method, and the device comprises a loading module which is used for applying a controllable load signal to a track of a tracked vehicle to simulate the stress conditions of the track under different working conditions; the vibration simulation module is used for providing a vibration signal with adjustable frequency and amplitude for the crawler so as to simulate the dynamic vibration response condition when the crawler runs; the environment simulation module is used for simulating the temperature, the humidity and the part corrosion condition of the environment where the tracked vehicle is located; the data acquisition module is used for acquiring stress, vibration and temperature and humidity change data of the crawler belt and crack propagation speed data of the edge part of the crawler belt after the part is corroded, and forming multi-modal data; and the data processing and evaluation module is used for performing real-time analysis on the multi-modal data and realizing tracked vehicle damage evaluation. According to the method, accurate damage identification and evaluation can be realized, the test capability under extreme conditions is realized, and the test comprehensiveness and the result reliability are improved.

Description

Technical Field

[0001] The invention relates to the technical field of tracked vehicles, and in particular to a tracked vehicle damage testing device and an evaluation method. Background Art

[0002] Tracked vehicles are widely used in military, engineering and agricultural fields. They are particularly good at operating in rugged, soft and muddy conditions due to their excellent off-road performance and ability to adapt to complex terrain. However, as one of the core components of tracked vehicles, tracks directly bear the ground reaction force and load transmission, and are prone to fatigue damage, wear and even breakage when running for a long time under complex working conditions. This will not only affect the working efficiency of the vehicle, but may also lead to major safety accidents. Especially in military and rescue missions, track damage may even pose a serious threat to mission completion and personnel safety.

[0003] Existing damage testing methods for tracked vehicles usually rely on field tests and empirical analysis. Although they can restore actual working conditions to a certain extent, the test conditions are difficult to control accurately, especially in extreme environments (such as high and low temperatures, strong humidity conditions). In addition, traditional test devices are mostly focused on a single type of damage, such as wear or vibration damage, making it difficult to achieve a comprehensive evaluation of all aspects of the track's life cycle and unable to fully reveal the impact mechanism of multi-factor coupling on track damage. Summary of the invention

[0004] The present invention aims to solve the technical problems in the related art at least to a certain extent. To this end, the first object of the present invention is to provide a tracked vehicle damage testing device, which can achieve more accurate damage identification and assessment, and has the ability to test under extreme conditions, thereby improving the comprehensiveness of the test and the reliability of the results.

[0005] A second object of the present invention is to provide a method for assessing damage of a tracked vehicle.

[0006] To achieve the above object, the present invention is implemented through the following technical solutions:

[0007] A tracked vehicle damage testing device, comprising:

[0008] A loading module is used to apply a controllable load signal to the track of the tracked vehicle to simulate the stress conditions of the track under different working conditions;

[0009] A vibration simulation module is used to provide a vibration signal with adjustable frequency and amplitude to the track to simulate the dynamic vibration response of the tracked vehicle when it is running;

[0010] Environmental simulation module, used to simulate the temperature, humidity and component corrosion conditions of the environment in which the tracked vehicle is located;

[0011] The data acquisition module is used to collect data on stress, vibration, temperature and humidity changes of the track, and crack growth rate data at the edge of the track after component corrosion, and to form multi-modal data;

[0012] The data processing and evaluation module is used to perform real-time analysis on the collected multimodal data and to implement damage assessment on tracked vehicles.

[0013] Preferably, the loading module applies a load signal through a servo hydraulic cylinder, and the output force range of the servo hydraulic cylinder is 0 to 100 kN, wherein, for the time curve of the load signal, the load variation mode adopted by the servo hydraulic cylinder when applying the load signal is at least one of a constant mode, a cyclic mode and an impact mode.

[0014] Preferably, the vibration simulation module provides a vibration signal to the track through a servo motor, the frequency range of the vibration signal output by the servo motor is 0 to 500 Hz, and the amplitude range is 0 to 20 mm. The vibration simulation module can automatically adjust and output the vibration signal according to the load signal size.

[0015] Preferably, the temperature range simulated by the environmental simulation module is -40 to 100° C., and the humidity range is 10% to 95%. The environmental simulation module is also used to achieve temperature and humidity regulation through PID control.

[0016] Preferably, the data acquisition module includes distributedly arranged strain gauges, acceleration sensors and infrared thermal imagers, wherein the strain gauges are used to collect stress change data and vibration displacement data of the tracks, the acceleration sensors are used to collect vibration acceleration data of the tracks, and the infrared thermal imagers are used to collect temperature and humidity change data of the environment in which the tracked vehicle is located.

[0017] Preferably, the data acquisition module is arranged at the track joint position or the track edge position.

[0018] Preferably, the loading stage of the loading module and the vibration simulation module includes an initial loading stage and a fatigue loading stage, wherein the initial loading stage is a stage of loading according to track material parameters, and the fatigue loading stage is a stage of repeated loading of load signals and vibration signals, wherein in the fatigue loading stage, the loading module and the vibration simulation module adopt a symmetrical loading waveform, and the type of the symmetrical loading waveform is any one of a sine wave and a triangular wave.

[0019] Preferably, the data processing and evaluation module is specifically used to evaluate the fatigue damage, wear trend and crack propagation of the track based on multimodal data.

[0020] Preferably, the device also includes a visual display module for generating a damage assessment report and displaying the damage assessment results on a screen.

[0021] To achieve the above object, the second aspect of the present invention provides a method for assessing damage of a tracked vehicle, comprising:

[0022] Apply a controllable load signal to the track of a tracked vehicle to simulate the stress conditions of the track under different working conditions;

[0023] Provide a vibration signal with adjustable frequency and amplitude to the track to simulate the dynamic vibration response of the tracked vehicle when it is running;

[0024] Simulate the temperature, humidity and component corrosion conditions of the environment in which the tracked vehicle is located;

[0025] Collect data on track stress, vibration, temperature and humidity changes, and crack growth rate at the edge of the track after component corrosion, and generate multi-modal data;

[0026] Real-time analysis of multimodal data enables assessment of track fatigue damage, wear trends, and crack growth on tracked vehicles.

[0027] The present invention has at least the following technical effects:

[0028] The present invention adopts multimodal data acquisition and analysis technology, which can simultaneously monitor multiple parameters such as stress and strain, temperature and humidity, vibration, and crack propagation speed data at the edge of the track after component corrosion, comprehensively covering different damage types and achieving more accurate damage identification and evaluation. The test device of the present invention can simulate a variety of actual working conditions including different terrain loads, temperature and humidity environments, and operating speeds such as vibration acceleration, especially the testing capabilities under extreme conditions, which improves the comprehensiveness of the test and the reliability of the results. Through efficient data acquisition and intelligent processing, and prediction of track damage trends, it provides a scientific basis for early hidden danger identification and optimized design, and greatly improves the evaluation efficiency and accuracy.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural block diagram of a tracked vehicle damage testing device according to an embodiment of the present invention.

[0031] Figure 2 The figure is a flow chart of a method for assessing damage of a tracked vehicle according to an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The present embodiment is described in detail below, and examples of the embodiment are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] A tracked vehicle damage testing device and evaluation method according to the present embodiment will be described below with reference to the accompanying drawings.

[0034] Figure 1 FIG. 1 is a structural block diagram of a tracked vehicle damage testing device according to an embodiment of the present invention. Figure 1 As shown, the tracked vehicle damage testing device includes a loading module, a vibration simulation module, an environmental simulation module, a data acquisition module, a data processing and evaluation module and a visual display module, wherein the loading module, the vibration simulation module and the environmental simulation module are respectively connected to the data acquisition module, and the data acquisition module, the data processing and evaluation module and the visual display module are connected in sequence.

[0035] In this embodiment, the loading module applies a controllable load signal to the track of the tracked vehicle through a servo hydraulic cylinder to simulate the stress conditions of the track under different working conditions.

[0036] The vibration simulation module provides a sinusoidal vibration signal with adjustable frequency and amplitude to the track through a servo motor to simulate the dynamic vibration response of the tracked vehicle during operation.

[0037] The environment simulation module is composed of a temperature and humidity control chamber, which is used to provide accurate temperature and humidity adjustment functions. The environment simulation module in this embodiment can simulate the temperature, humidity and component corrosion conditions of the environment in which the tracked vehicle is located.

[0038] The data acquisition module includes distributed strain gauges, acceleration sensors and infrared thermal imagers, which are used to collect stress change data, vibration displacement data, vibration acceleration data and temperature and humidity change data of the track.

[0039] The data processing and evaluation module performs real-time analysis based on the collected multimodal data and evaluates the fatigue damage, wear trend and crack propagation of the track through a preset algorithm model.

[0040] The visual display module is used to generate damage assessment reports in real time and display relevant test results on a large screen.

[0041] Among them, the output force range of the servo hydraulic cylinder of the loading module is 0 to 100 kN, and for the time curve of the load signal, the load change mode adopted by the servo hydraulic cylinder when applying the load signal can select at least one of the constant mode, the cycle mode and the impact mode.

[0042] Furthermore, the vibration simulation module outputs a vibration signal through a servo motor with a frequency range of 0 to 500 Hz and an amplitude range of 0 to 20 mm, and can automatically adjust the vibration output according to the size of the load signal.

[0043] Optionally, the environment simulation module simulates a temperature range of -40 to 100°C and a humidity range of 10% to 95%, which can be precisely adjusted through PID (proportional integral differential) control.

[0044] Furthermore, the strain gauges and infrared thermal imagers in the data acquisition module are distributed at the key stress-bearing positions of the track, with the strain gauge strain measurement accuracy of 0.1με (micro strain) and the infrared thermal imager temperature measurement accuracy of ±0.5°C. Among them, the key stress-bearing positions include the track joints or the track edges.

[0045] Optionally, the loading stage of the loading module and the vibration simulation module includes an initial loading stage and a fatigue loading stage, wherein the initial loading stage is a stage of loading according to the track material parameters, and the fatigue loading stage is a stage of repeated loading of load signals and vibration signals. In the fatigue loading stage, the loading module and the vibration simulation module adopt a symmetrical loading waveform, and the type of the symmetrical loading waveform is any one of a sine wave and a triangular wave. Of course, the loading module and the vibration simulation module can also adopt a random wave.

[0046] Figure 2 FIG. 1 is a flow chart of a method for assessing damage of a tracked vehicle according to an embodiment of the present invention. Figure 2 As shown, the method includes:

[0047] Step S101: applying a controllable load signal to the track of the tracked vehicle to simulate the stress conditions of the track under different working conditions.

[0048] Step S102: providing a vibration signal with adjustable frequency and amplitude to the track to simulate the dynamic vibration response of the tracked vehicle when it is running.

[0049] Step S103: Simulate the temperature, humidity and component corrosion conditions of the environment in which the tracked vehicle is located.

[0050] Step S104: collecting data on stress, vibration, temperature and humidity changes of the track, and crack propagation speed data at the edge of the track after component corrosion, and forming multimodal data.

[0051] Step S105: Perform real-time analysis on the multimodal data to evaluate the track fatigue damage, wear trend and crack propagation of the track of the tracked vehicle.

[0052] This embodiment adopts multimodal data acquisition and analysis technology, which can simultaneously monitor multiple parameters of the track, such as stress and strain, temperature, vibration, etc., comprehensively covering different damage types, and achieving more accurate damage identification and assessment. In addition, this method can simulate a variety of actual working conditions including different terrain loads, temperature and humidity environments, and operating speeds, especially the testing capabilities under extreme conditions, which improves the comprehensiveness of the test and the reliability of the results.

[0053] In this embodiment, the specific steps of the tracked vehicle damage assessment method are as follows:

[0054] Step 1: Test device construction: Build a test system including a loading module, a vibration simulation module, a data acquisition module, and an environmental simulation module;

[0055] (a) The loading module uses an electric loading assembly to apply controllable pressure, i.e., controllable load;

[0056] (b) the vibration simulation module generates a vibration signal of a preset frequency and amplitude using a servo motor;

[0057] (c) The data acquisition module is installed at the key nodes of the crawler to collect data such as strain, vibration displacement, temperature and humidity, and component corrosion status in real time;

[0058] (d) The environmental simulation module simulates extreme working conditions through temperature and humidity controllers and corrosive liquid spraying devices.

[0059] Step 2: Damage Induction Test: Load the tracked vehicle through the loading module and vibration simulation module, and continuously monitor the strain distribution, crack formation and surface peeling state of the track.

[0060] (a) Initial loading stage: Load according to the performance parameters of the track material to obtain the benchmark response data;

[0061] (b) Fatigue loading stage: repeated loading conditions are applied until obvious cracks or peeling appear on the track surface.

[0062] Step 3: Data analysis and modeling: Perform multi-dimensional analysis on the collected data and establish a mapping relationship between damage and operating parameters.

[0063] (a) Analysis of the effect of vibration frequency on damage based on Fourier transform;

[0064] (b) Use finite element model to simulate stress concentration distribution under different loading conditions;

[0065] (c) Construct a damage accumulation model and calculate the critical damage value based on fatigue life theory.

[0066] Step 4: Test result evaluation: Evaluate the remaining service life and failure risk of the track based on the damage accumulation model and experimental results.

[0067] (a) Compare experimental data with predicted data to verify the accuracy of the evaluation model;

[0068] (b) Output an evaluation report and provide recommendations for track replacement.

[0069] Step 5: Equipment reset and maintenance: After completing the test, clean the equipment and calibrate the data acquisition module and vibration simulation module to ensure the accuracy of subsequent tests.

[0070] Experiment 1: Tracked vehicle fatigue damage test experiment

[0071] 1. Purpose of the experiment

[0072] The fatigue damage behavior of a certain type of tracked vehicle under repeated loading and vibration conditions is evaluated, and the accuracy of the damage accumulation model is verified through sensor data.

[0073] 2. Experimental Setup

[0074] (1) Loading module: uses a servo hydraulic cylinder to apply a maximum load of 100kN to the crawler;

[0075] (2) Vibration simulation module: uses a servo motor to generate a 10 Hz-50 Hz sinusoidal vibration signal;

[0076] (3) Environmental simulation module: maintain the ambient temperature at 40°C and humidity at 85% through a temperature and humidity controller;

[0077] (4) Data acquisition module: equipped with distributed strain gauges, accelerometers and infrared thermal imagers;

[0078] (5) Data processing and evaluation module: Equipped with data analysis software to analyze sensor data in real time.

[0079] 3. Testing Process

[0080] (1) Test preparation

[0081] a. Check whether the test devices (number 1-5) are operating normally;

[0082] b. Fix the crawler on the loading module (label 1);

[0083] c. Install strain gauges and infrared thermal imagers at key locations of the track (such as joints and edges).

[0084] (2) Initial loading phase

[0085] a. Gradually increase the loading force from 10kN to 50kN to obtain the initial stress-strain data of the track;

[0086] b. Record the loading force, deformation and temperature rise curve.

[0087] (3) Fatigue loading stage

[0088] a. Set the cyclic loading conditions: loading force 40kN, loading frequency 5Hz, cycle 100,000 times;

[0089] b. Simultaneously start the vibration simulation module (label 2), set the frequency to 30 Hz, and the amplitude to 0.5 mm;

[0090] c. Real-time monitoring of crack propagation through the data acquisition module (label 4).

[0091] (4) Test completed

[0092] a. Observe the peeling and cracking positions on the track surface;

[0093] b. Import the test data into the data processing and evaluation module (label 5) to verify the fatigue life prediction model.

[0094] 4. Experimental Results

[0095] (1) Obvious crack propagation occurs at the stress concentration site, and the crack starts at the track joint;

[0096] (2) The prediction accuracy of the damage accumulation model was verified experimentally, and the error with the actual test data was less than 5%;

[0097] (3) According to the model evaluation, the fatigue life of the track is 120,000 loading cycles.

[0098] Experiment 2: Effects of complex environmental conditions on track damage

[0099] 1. Purpose of the experiment

[0100] Analyze the damage growth behavior of track materials under high temperature and high humidity conditions, and evaluate the effect of corrosion on fatigue performance.

[0101] 2. Experimental conditions

[0102] (1) Temperature and humidity environment: The temperature is set to 60°C and the humidity is set to 95%;

[0103] (2) Corrosive media: In the environmental simulation module (label 3), 5% NaCl solution is sprayed regularly;

[0104] (3) Loading conditions: loading force 30 kN, vibration frequency 20 Hz, test time 72 hours.

[0105] 3. Experimental Procedure

[0106] (1) Spray the corrosive medium evenly on the track surface and leave it for 2 hours;

[0107] (2) Start the loading module (label 1) and the vibration simulation module (label 2), and the loading conditions are the same as those in Experiment 1;

[0108] (3) Collect infrared images every 12 hours and analyze the temperature rise changes at the damaged location.

[0109] 4. Experimental Results

[0110] (1) Under corrosive conditions, the crack propagation rate at the edge of the track increases significantly;

[0111] (2) Compared with normal temperature and humidity conditions, fatigue life is reduced by about 35%;

[0112] (3) Experiments show that the corrosive environment accelerates the fatigue damage of the material, verifying the model's ability to describe the sensitivity of environmental parameters.

[0113] Comparative analysis of experimental data

[0114] 1. Test data table

[0115] Table 1 Test data

[0116]

[0117]

[0118] 2. Data Analysis

[0119] (1) Under normal temperature and humidity conditions, the fatigue life of the track is close to the theoretical value;

[0120] (2) High temperature and high humidity environment has a significant impact on material properties, and fatigue life is significantly reduced;

[0121] (3) The error range of the model prediction is within the acceptable range, which verifies the reliability of the evaluation method.

[0122] The tracked vehicle damage assessment method of this embodiment comprehensively considers influencing factors such as complex loading conditions, vibration frequency and environmental conditions, and can accurately simulate the damage accumulation behavior in actual use. Compared with the prior art, the present invention has significant advantages in the following aspects:

[0123] (1) Multi-dimensional data acquisition: Real-time monitoring of mechanical parameters, thermal parameters and dynamic signals;

[0124] (2) Accurate life prediction: Improve the accuracy of life prediction through damage accumulation model and experimental verification;

[0125] (3) Modular design: The modules of the device can be flexibly combined to meet different testing requirements;

[0126] (4) Adapt to various environments: It can simulate extreme working conditions such as high temperature, high humidity, and corrosion, which has important guiding significance for engineering applications.

[0127] In summary, the present invention adopts multimodal data acquisition and analysis technology, which can simultaneously monitor multiple parameters such as stress and strain, temperature and humidity, vibration, and crack propagation speed data at the edge of the track after component corrosion, comprehensively covering different damage types and achieving more accurate damage identification and evaluation. The test device of the present invention can simulate a variety of actual working conditions including different terrain loads, temperature and humidity environments, and operating speeds such as vibration acceleration, especially the testing capabilities under extreme conditions, which improves the comprehensiveness of the test and the reliability of the results. Through efficient data acquisition and intelligent processing, and prediction of track damage trends, it provides a scientific basis for early hidden danger identification and optimized design, and greatly improves the evaluation efficiency and accuracy.

[0128] 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 the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0129] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be apparent to those skilled in the art that various modifications and substitutions of the present invention will occur. Therefore, the protection scope of the present invention should be limited by the appended claims.

Claims

1. A tracked vehicle damage testing device, characterized in that: include: A loading module is used to apply a controllable load signal to the track of the tracked vehicle to simulate the stress conditions of the track under different working conditions; A vibration simulation module is used to provide a vibration signal with adjustable frequency and amplitude to the track to simulate the dynamic vibration response of the tracked vehicle when it is running; Environmental simulation module, used to simulate the temperature, humidity and component corrosion conditions of the environment in which the tracked vehicle is located; The data acquisition module is used to collect data on stress, vibration, temperature and humidity changes of the track, and crack growth rate data at the edge of the track after component corrosion, and to form multi-modal data; The data processing and evaluation module is used to perform real-time analysis on the collected multimodal data and to implement damage assessment on tracked vehicles.

2. The tracked vehicle damage testing device according to claim 1, characterized in that: The loading module applies a load signal through a servo hydraulic cylinder, and the output force range of the servo hydraulic cylinder is 0 to 100 kN. For the time curve of the load signal, the load variation mode adopted by the servo hydraulic cylinder when applying the load signal is at least one of a constant mode, a cyclic mode and an impact mode.

3. The tracked vehicle damage testing device according to claim 1, characterized in that: The vibration simulation module provides a vibration signal to the crawler through a servo motor. The frequency range of the vibration signal output by the servo motor is 0-500Hz, and the amplitude range is 0-20mm. The vibration simulation module can automatically adjust the vibration signal according to the load signal size and output it.

4. The tracked vehicle damage testing device according to claim 1, characterized in that: The temperature range simulated by the environmental simulation module is -40 to 100° C., and the humidity range is 10% to 95%. The environmental simulation module is also used to achieve temperature and humidity regulation through PID control.

5. The tracked vehicle damage testing device according to claim 1, characterized in that: The data acquisition module includes distributedly arranged strain gauges, acceleration sensors and infrared thermal imagers, wherein the strain gauges are used to collect stress change data and vibration displacement data of the tracks, the acceleration sensors are used to collect vibration acceleration data of the tracks, and the infrared thermal imagers are used to collect temperature and humidity change data of the environment in which the tracked vehicle is located.

6. The tracked vehicle damage testing device according to claim 1 or 5, characterized in that: The data acquisition module is arranged at the track joint position or the track edge position.

7. The tracked vehicle damage testing device according to claim 1, characterized in that: The loading stages of the loading module and the vibration simulation module include an initial loading stage and a fatigue loading stage, wherein the initial loading stage is a stage of loading according to track material parameters, and the fatigue loading stage is a stage of repeated loading of load signals and vibration signals, wherein in the fatigue loading stage, the loading module and the vibration simulation module adopt a symmetrical loading waveform, and the type of the symmetrical loading waveform is any one of a sine wave and a triangular wave.

8. The tracked vehicle damage testing device according to claim 1, characterized in that: The data processing and evaluation module is specifically used to evaluate the fatigue damage, wear trend and crack propagation of the track based on multimodal data.

9. The tracked vehicle damage testing device according to claim 1, characterized in that: It also includes a visual display module for generating a damage assessment report and displaying the damage assessment results on the screen.

10. A method for assessing damage to a tracked vehicle, characterized in that: include: Apply a controllable load signal to the track of a tracked vehicle to simulate the stress conditions of the track under different working conditions; Provide a vibration signal with adjustable frequency and amplitude to the track to simulate the dynamic vibration response of the tracked vehicle when it is running; Simulate the temperature, humidity and component corrosion conditions of the environment in which the tracked vehicle is located; Collect data on track stress, vibration, temperature and humidity changes, and crack growth rate at the edge of the track after component corrosion, and generate multi-modal data; Real-time analysis of multimodal data enables assessment of track fatigue damage, wear trends, and crack growth on tracked vehicles.

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