An air duct system simulation running test bench and test method

Abstract

The application provides a wind channel system simulation running test bench and a test method. The wind channel system simulation running test bench comprises: a test wind channel which is a test body of a fan wind channel system; a cooling fan installed on the test wind channel, used to provide a wind volume source of the entire fan wind channel system; a hard wind channel connecting the test wind channel and a traction fan, and changing the gas flow in the hard wind channel by adjusting an internal rotating cover plate, so as to simulate the working conditions of different blockage degrees of the air outlet of the traction fan; a soft wind channel used to improve the integrity of the fan wind channel system and embody the real situation of the fan wind channel system when the vehicle is installed; and the traction fan is connected at a corresponding position of the test wind channel through the hard wind channel and the soft wind channel. The wind channel system simulation running test bench and the test method provide data support for the selection of the cooling fan and the design verification of the fan wind channel system, and promote the safe operation of high-speed motor train units.

Description

Technical Field

[0001] This application relates to the field of motor design technology, and more specifically, to a test bench and test method for duct system simulation operation. Background Technology

[0002] High-speed trains employ various types of onboard equipment, each with different functions to meet the demands of high-speed, safe, and stable operation. The traction motor cooling fan and duct system is a typical example of such auxiliary equipment. Its primary function is to continuously supply cooling air to the high-speed rotating motors mounted on the running gear, ensuring their safe operation. Since the cooling fan is an active vibration device, the high-speed rotation of the auxiliary motor generates vibration. Simultaneously, the high-pressure airflow generated by the compressor flowing through the ducts produces airflow fluctuations, the frequency of which is related to the internal structure of the ducts. Therefore, the traction motor cooling fan and duct system is one of the vibration sources that cannot be ignored in the high-speed train body.

[0003] In traditional vehicle design and verification processes, the duct structure is fixed between the car body and the bogie structure, and all locations have high sealing requirements. This makes it difficult to place sensors inside or outside the narrow duct structure to monitor its vibration and strength during actual operation. Simulation analysis can only predict the internal pressure distribution of the fan under normal operating conditions, but it cannot accurately assess whether the structural vibration and strength meet the requirements. Furthermore, traditional cooling fan test benches generally only consider the fan's own load changes and do not incorporate the duct structure, which has the characteristics of a real vehicle, into the test platform. Therefore, they cannot realistically simulate the actual load changes of the fan on the vehicle. However, in recent years, several high-speed trains have experienced abnormally high-amplitude vibrations in the floor above the ducts during operation. Even worse, some vehicles have been found to have cracks in their duct structures during unloading inspections. Faced with these problems, it is impossible to analyze and find the cause using existing simulation analysis methods or vibration or stress data obtained from non-duct crack locations obtained from line testing, making it even more difficult to propose accurate and reasonable solutions. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a test bench and testing method for duct system simulation operation. By building a test bench for duct system simulation operation, it is possible to accurately simulate the typical working conditions that may occur in the cooling fan and duct system of the traction motor of high-speed train during high-speed operation. At the same time, by arranging sensors, it is possible to accurately obtain the vibration, aerodynamic load, stress measurement characteristics and vibration acceleration of all key positions in the fan and duct system, providing data support for the selection of cooling fans and the design verification of duct structure system, and promoting the safe operation of high-speed trains.

[0005] In a first aspect, embodiments of this application provide a duct system simulation test bench, which is used to simulate a fan duct system. The duct system simulation test bench is fixed to a platform by a support structure, and includes:

[0006] The test air duct is the main test component of the fan air duct system.

[0007] A cooling fan, installed on the test air duct, is used to provide the airflow source for the entire fan and air duct system;

[0008] A rigid air duct is used to connect the test air duct and the traction fan. At the same time, by adjusting the internal rotating cover, the gas flow rate in the rigid air duct is changed, thereby simulating the working conditions of different degrees of blockage at the air outlet of the traction fan.

[0009] The flexible air duct is used to improve the integrity of the fan duct system and reflect the actual situation of the fan duct system when it is installed on the vehicle.

[0010] The traction fan is connected to the corresponding position of the test air duct through the rigid air duct and the flexible air duct.

[0011] Furthermore, the duct system simulation test bench also includes:

[0012] Multiple acceleration sensors are used to measure the acceleration in the test duct;

[0013] A pneumatic load sensor is used to measure the aerodynamic load in the test duct.

[0014] Multiple strain gauge sensors are used to measure fatigue stress in the test air duct;

[0015] Multiple vibration acceleration sensors are used to measure the vibration acceleration of the test duct, the traction fan, and the cooling fan.

[0016] Secondly, embodiments of this application also provide a test method for typical operating conditions of a duct system. The test method utilizes a duct system simulation test bench provided in embodiments of this application. The test method includes:

[0017] By blocking the air inlet of the cooling fan and / or the air outlet of the traction fan, the first simulated working condition of the air duct blockage is generated, simulating the fault conditions of a high-speed train during operation.

[0018] Power on the duct system simulation test bench and apply the first simulated working condition to the duct system simulation test bench to carry out duct structure modal test, duct internal aerodynamic pressure test, structural stress test and system vibration test.

[0019] By changing the blockage of the air inlet of the cooling fan and / or the air outlet of the traction fan, a second simulated operating condition is obtained. This second simulated operating condition is then applied to the air duct system simulation test bench, and sensor data corresponding to the sensors arranged in the air duct system simulation test bench are collected to simulate and test the operating conditions with different degrees of blockage.

[0020] Furthermore, by blocking the air inlet of the cooling fan and / or the air outlet of the traction fan, a first simulated operating condition of air duct blockage is generated to simulate a fault condition during the operation of a high-speed train, including:

[0021] The air inlet of the cooling fan is sealed with tape to obtain the first simulated working condition;

[0022] or,

[0023] The air outlet of the traction fan is blocked by the flip cover of the blocking area adjustment mechanism to obtain the first simulated working condition.

[0024] or,

[0025] The air inlet of the cooling fan is sealed with tape to obtain the first simulated sub-condition;

[0026] For the air outlet of the traction fan, the air outlet of the traction fan is blocked by the flip cover plate of the blocking area adjustment mechanism to obtain the second simulated sub-condition.

[0027] The first simulated sub-condition is obtained by combining the first simulated sub-condition with the second simulated sub-condition.

[0028] Furthermore, the test method also includes:

[0029] When conducting the modal test of the duct structure, multiple acceleration sensors are arranged at multiple different positions on the lower surface of the test duct of the duct system simulation test bench, and the LMS modal acquisition and analysis system is used to collect acceleration data and analyze modal frequencies and mode shapes.

[0030] When conducting aerodynamic pressure tests inside the duct, an aerodynamic simulation analysis model of the duct structure is built using Starccm+ software to simulate the maximum aerodynamic load and its location when the airflow passes through the duct structure. Based on the simulation analysis results, aerodynamic load sensors are placed at the maximum aerodynamic load point inside the duct to test the aerodynamic load inside the duct.

[0031] When the structural stress test is carried out, the structural fatigue load simulation is performed to obtain the fatigue stress distribution characteristics of the simulated operation test bench of the air duct system. Based on the fatigue stress distribution characteristics and the location of fatigue failure in the test air duct, at least one strain gauge sensor is arranged to test the fatigue stress in the test air duct.

[0032] When conducting vibration tests on the system, multiple vibration acceleration sensors are arranged at the locations of the test duct, the cooling fan, and the traction fan to test the vibration transmission characteristics of the duct system simulated operation test bench.

[0033] Furthermore, changing the blocking status of the air inlet of the cooling fan and / or the air inlet of the traction fan to obtain the second simulated operating condition includes:

[0034] The second simulated working condition is obtained by changing the sealing area of ​​the air inlet of the cooling fan using the tape.

[0035] or,

[0036] For the air outlet of the traction fan, the percentage of the air inlet of the traction fan is adjusted by the flip cover of the sealing area adjustment mechanism to obtain the second simulated working condition;

[0037] or,

[0038] For the air inlet of the cooling fan, the sealing area of ​​the air inlet of the cooling fan is changed by using the tape to obtain the third simulated sub-condition;

[0039] For the air outlet of the traction fan, the percentage of the air inlet of the traction fan is adjusted by the flip cover of the sealing area adjustment mechanism to obtain the fourth simulated sub-condition.

[0040] The third simulated sub-condition is combined with the fourth simulated sub-condition to obtain the second simulated condition.

[0041] Thirdly, embodiments of this application also provide a test apparatus for typical operating conditions of a duct system, the test apparatus comprising:

[0042] The simulated operating condition generation module is used to simulate the fault conditions of a high-speed train during operation by blocking the air inlet of the cooling fan and / or the air outlet of the traction fan, and to generate the first simulated operating condition of the air duct blockage.

[0043] The test module is used to power on the duct system simulation test bench and apply the first simulated working condition to the duct system simulation test bench to carry out duct structure modal test, duct internal aerodynamic pressure test, structural stress test and system vibration test.

[0044] The data acquisition module is used to change the blockage status of the air inlet of the cooling fan and / or the air outlet of the traction fan to obtain a second simulated operating condition, and apply the second simulated operating condition to the air duct system simulation operation test bench to collect sensor data corresponding to the sensors arranged in the air duct system simulation operation test bench, so as to conduct simulation tests on simulated operating conditions with different degrees of blockage.

[0045] Furthermore, when the simulated operating condition generation module is used to simulate a fault condition during the operation of a high-speed train by blocking the air inlet of the cooling fan and / or the air outlet of the traction fan, and to generate a first simulated operating condition of air duct blockage, the simulated operating condition generation module is also used for:

[0046] The air inlet of the cooling fan is sealed with tape to obtain the first simulated working condition;

[0047] or,

[0048] The air outlet of the traction fan is blocked by the flip cover of the blocking area adjustment mechanism to obtain the first simulated working condition.

[0049] or,

[0050] The air inlet of the cooling fan is sealed with tape to obtain the first simulated sub-condition;

[0051] For the air outlet of the traction fan, the air outlet of the traction fan is blocked by the flip cover plate of the blocking area adjustment mechanism to obtain the second simulated sub-condition.

[0052] The first simulated sub-condition is obtained by combining the first simulated sub-condition with the second simulated sub-condition.

[0053] Fourthly, embodiments of this application also provide an electronic device, including: a processor, a memory, and a bus. The memory stores machine-readable instructions executable by the processor. When the electronic device is running, the processor communicates with the memory via the bus. When the machine-readable instructions are executed by the processor, the steps of the test method for typical operating conditions of the air duct system described above are performed.

[0054] Fifthly, embodiments of this application also provide a computer-readable storage medium storing a computer program, which, when executed by a processor, performs the steps of the test method for typical operating conditions of the air duct system as described above.

[0055] The duct system simulation test bench and testing methods provided in this application enable the accurate simulation of typical operating conditions that may occur in the cooling fans and duct systems of high-speed train traction motors during high-speed operation. Simultaneously, by deploying sensors, the test bench can accurately obtain the vibration, aerodynamic load, stress measurement characteristics, and vibration acceleration at all key locations in the fan and duct system. This provides data support for cooling fan selection and duct structure system design verification, promoting the safe operation of high-speed trains.

[0056] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0057] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0058] Figure 1 A schematic diagram of the hardware structure of a duct system simulation test bench provided in an embodiment of this application;

[0059] Figure 2 A flowchart illustrating a test method for a typical operating condition of a duct system provided in an embodiment of this application;

[0060] Figure 3 A schematic diagram of the structure of a test device for a typical operating condition of a duct system provided in an embodiment of this application;

[0061] Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. Based on the embodiments of this application, every other embodiment obtained by those skilled in the art without inventive effort falls within the scope of protection of this application.

[0063] First, the applicable scenarios for this application will be introduced. This application can be applied to the field of motor design technology.

[0064] High-speed trains employ various types of onboard equipment, each with different functions to meet the demands of high-speed, safe, and stable operation. The traction motor cooling fan and duct system is a typical example of such auxiliary equipment. Its primary function is to continuously supply cooling air to the high-speed rotating motors mounted on the running gear, ensuring their safe operation. Since the cooling fan is an active vibration device, the high-speed rotation of the auxiliary motor generates vibration. Simultaneously, the high-pressure airflow generated by the compressor flowing through the ducts produces airflow fluctuations, the frequency of which is related to the internal structure of the ducts. Therefore, the traction motor cooling fan and duct system is one of the vibration sources that cannot be ignored in the high-speed train body.

[0065] Research has revealed that in traditional vehicle design and verification processes, the air duct structure is fixed between the car body and bogie structure, with high sealing requirements at all locations. This makes it difficult to place sensors inside or outside the narrow air duct structure to monitor its vibration and strength during actual operation. Simulation analysis can only predict the internal pressure distribution of the fan under normal operating conditions, but it cannot accurately assess whether the structural vibration and strength meet the requirements. Furthermore, traditional cooling fan test benches generally only consider the fan's own load changes and do not incorporate the air duct, which has the structural characteristics of a real vehicle, into the test platform, thus failing to realistically simulate the actual load changes of the fan on the vehicle. However, in recent years, several high-speed trains have experienced abnormally high-amplitude vibrations in the floor above the air ducts during operation. Even more concerning, some vehicles have been found to have cracks in their air duct structures during unloading inspections. Faced with these problems, it is impossible to analyze and find the cause using existing simulation analysis methods or vibration or stress data obtained from non-air duct crack locations obtained from line testing, making it even more difficult to propose accurate and reasonable solutions.

[0066] Based on this, the embodiments of this application provide a test bench and test method for duct system simulation operation, which provides data support for the selection of cooling fans and the design verification of duct structure systems, and promotes the safe operation of high-speed trains.

[0067] Please see Figure 1 , Figure 1 This is a schematic diagram of the hardware structure of a duct system simulation test bench provided in an embodiment of this application. Figure 1 As shown in the figure, the duct system simulation test bench 100 provided in this application embodiment is used to simulate the fan duct system. The duct system simulation test bench 100 is fixed on the platform by a support structure. The duct system simulation test bench 100 includes:

[0068] Test air duct 101 is the main test body of the fan air duct system.

[0069] Here, the test duct 101 serves as the main test component of the fan duct system, guiding the airflow between the cooling fan 102 and the traction fan 105. Considering the requirements for stress and pressure distribution within the duct, several equipment mounting holes need to be drilled in the upper cover of the test duct 101. These holes will be sealed after the measuring points are fully arranged. Furthermore, considering the need for measuring point adjustments during the test, it is recommended that the sealing devices at the openings in the upper cover be designed for easy disassembly and assembly.

[0070] Cooling fan 102 is installed on the test air duct and is used to provide the air volume source for the entire fan duct system.

[0071] Here, the cooling fan 102 is used to drive airflow through the entire air duct system simulation test bench 100 and provide a suitable airflow. According to the embodiment provided in this application, the cooling fan 102 is preferably selected from the fans of the vehicle group where the problematic air duct cracks or abnormal vibration problems are reported, to provide the airflow source for the entire system.

[0072] The rigid air duct 103 is used to connect the test air duct 101 and the traction fan 105. At the same time, by adjusting the internal rotating cover, the gas flow rate in the rigid air duct 103 is changed, thereby simulating the working conditions of different degrees of blockage at the air outlet of the traction fan 105.

[0073] Here, the rigid air duct 103 is connected between the test air duct 101 and the traction fan 105. A blocking area adjustment mechanism is installed in the rigid air duct 103 to adjust the rotating cover plate within it. The rotating cover plate is connected to the adjustment mechanism via a shaft. When the rotating cover plate is perpendicular to the cross-section of the rigid air duct, the blocking percentage is 0%. When the rotating cover plate coincides with the cross-section of the rigid air duct, the blocking percentage is 100%. The required blocking percentage can be calculated by the percentage of the projected area of ​​the rotating cover plate on the cross-section of the rigid air duct to the cross-sectional area of ​​the rigid air duct. When the required percentage is reached, the angle of the rotating cover plate can be fixed via a slot on the shaft. Thus, by adjusting the rotating cover plate inside the rigid air duct 103, the gas flow rate within the rigid air duct 103 can be changed, thereby simulating different degrees of blockage at the outlet of the traction fan 105.

[0074] The flexible air duct 104 is used to improve the integrity of the fan duct system and reflect the actual situation of the fan duct system when it is installed on the vehicle.

[0075] The traction fan 105 is connected to the corresponding position of the test air duct 101 through the rigid air duct 103 and the flexible air duct 104.

[0076] Furthermore, the duct system simulation test bench 100 also includes:

[0077] Multiple acceleration sensors are used to measure acceleration in the test duct.

[0078] Here, the acceleration sensor can be set at different positions on the lower surface of the test air duct 101 to detect the acceleration of the airflow at different positions in the test air duct 101.

[0079] A pneumatic load sensor is used to measure the pneumatic load in the test duct 101.

[0080] Here, the aerodynamic load sensor needs to be set at the maximum aerodynamic load point inside the test air duct 101 to test the aerodynamic load inside the test air duct 101.

[0081] Multiple strain gauge sensors are used to measure fatigue stress in the test duct.

[0082] Here, strain gauge sensors need to be installed at the location where fatigue failure occurs in the test air duct 101 to detect fatigue stress at the fatigue failure location.

[0083] Multiple vibration acceleration sensors are used to measure the vibration acceleration of the test air duct 101, the traction fan 105 and the cooling fan 102.

[0084] Here, multiple vibration acceleration sensors are located at corresponding positions in the test air duct 101, the traction fan 105, and the cooling fan 102, respectively, to detect the vibration acceleration of the test air duct 101, the traction fan 105, and the cooling fan 102.

[0085] According to embodiments of this application, this application also provides a test method for typical operating conditions of an air duct system. Please refer to... Figure 2 , Figure 2 This is a flowchart illustrating a test method for a typical operating condition of a duct system provided in an embodiment of this application. Figure 2 As shown in the figure, the test method provided in this application embodiment utilizes the duct system simulation test bench provided in this application embodiment, and the test method includes:

[0086] S201 simulates the first simulated operating condition of air duct blockage by blocking the air inlet of the cooling fan and / or the air outlet of the traction fan to simulate the fault conditions of a high-speed train during operation.

[0087] Regarding step S201 above, in specific implementation, after the air duct system simulation test bench is set up, the air inlet of the cooling fan and / or the air outlet of the traction fan are blocked to simulate the fault conditions of the high-speed train during operation, and generate the first simulated working condition of air duct blocking.

[0088] When generating the first simulated operating condition, the air inlet of the cooling fan can be blocked only, the air inlet of the traction fan can be blocked only, or both the air inlets of the cooling fan and the traction fan can be blocked simultaneously to simulate possible combined operating conditions. Specifically, regarding step S201 above, the first simulated operating condition of air duct blocking, which simulates the fault conditions of a high-speed train during operation by blocking the air inlet of the cooling fan and / or the air outlet of the traction fan, includes the following three situations.

[0089] Scenario 1: The air inlet of the cooling fan is sealed with tape to obtain the first simulated working condition.

[0090] In response to the above scenario one, during implementation, the air inlet of the cooling fan is sealed with tape to obtain the first simulated working condition. Different degrees of sealing can be simulated in sequence to reveal the influence of the cooling fan's air intake on the vibration of the fan duct system.

[0091] or,

[0092] Scenario 2: For the air outlet of the traction fan, the air outlet of the traction fan is blocked by the flip cover plate of the blocking area adjustment mechanism to obtain the first simulated working condition.

[0093] Regarding scenario two above, for the traction motor's air outlet, the flip-top cover of the rigid air duct is adjusted using a sealing area adjustment mechanism. The flip-top cover and the adjustment mechanism are connected by a shaft. When the rotating cover is perpendicular to the cross-section of the rigid air duct, the sealing percentage is 0%; when the rotating cover coincides with the cross-section of the rigid air duct, the sealing area is 100%. The required sealing percentage can be calculated by dividing the projected area of ​​the rotating cover on the cross-section of the rigid air duct by the cross-sectional area of ​​the rigid air duct. When the required percentage is reached, the cover angle can be fixed using a slot on the shaft. Thus, the air outlet of the traction fan is sealed by the flip-top cover of the sealing area adjustment mechanism, obtaining the first simulated operating condition.

[0094] or,

[0095] Scenario 3: For the air inlet of the cooling fan, use tape to seal it to obtain the first simulated sub-condition; for the air outlet of the traction fan, use the flip cover of the sealing area adjustment mechanism to seal the air outlet of the traction fan to obtain the second simulated sub-condition; combine the first simulated sub-condition and the second simulated sub-condition to obtain the first simulated condition.

[0096] Regarding scenario three above, in specific implementation, the air inlet of the cooling fan is sealed with tape to obtain the first simulated sub-condition; the air outlet of the traction fan is sealed by the flip-up cover of the sealing area adjustment mechanism to obtain the second simulated sub-condition; the first and second simulated sub-conditions are combined to obtain the first simulated condition. In this way, by simultaneously sealing the air inlet of the cooling fan and the air outlet of the traction motor, possible cross-combination conditions can be simulated.

[0097] S202, Power on the duct system simulation test bench and apply the first simulated working condition to the duct system simulation test bench to carry out duct structure modal test, duct internal aerodynamic pressure test, structural stress test and system vibration test.

[0098] Regarding step S202 above, in specific implementation, the duct system simulation test bench is powered on, and the first simulated working condition is applied to the duct system simulation test bench to carry out duct structure modal tests, duct internal aerodynamic pressure tests, structural stress tests, and system vibration tests.

[0099] Specifically, the test method provided in this application embodiment also includes:

[0100] When conducting modal tests on the aforementioned duct structure, multiple acceleration sensors are arranged at various locations on the lower surface of the test duct of the duct system simulation test bench. The LMS modal acquisition and analysis system is used to acquire acceleration data and analyze modal frequencies and mode shapes.

[0101] In accordance with the above steps, for the modal testing of the air duct structure, acceleration sensors were placed at multiple different locations on the lower surface of the test air duct, and the LMS modal acquisition and analysis system was used to collect acceleration data and analyze modal frequencies and mode shapes.

[0102] When conducting aerodynamic pressure tests inside the duct, an aerodynamic simulation analysis model of the duct structure is built using Starccm+ software to simulate the maximum aerodynamic load and its location when the airflow passes through the duct structure. Based on the simulation analysis results, aerodynamic load sensors are placed at the maximum aerodynamic load point inside the duct to test the aerodynamic load inside the duct.

[0103] To address the above steps, and specifically for testing the aerodynamic pressure inside the duct, an aerodynamic simulation model of the duct structure was first built using Starccm+ software to simulate the maximum aerodynamic load and its location as airflow passes through the duct structure. Based on the simulation results, sensors were placed at the points of maximum aerodynamic load inside the duct to test the internal aerodynamic load.

[0104] When conducting the structural stress test, structural fatigue load simulation is performed to obtain the fatigue stress distribution characteristics of the simulated operation test bench of the air duct system. Based on the fatigue stress distribution characteristics and the location of fatigue failure in the test air duct, at least one strain gauge sensor is arranged to test the fatigue stress in the test air duct.

[0105] In accordance with the above steps, for the stress test of the air duct structure, structural fatigue load simulation is performed to obtain the fatigue stress distribution characteristics of the air duct system simulation test bench. Based on the fatigue stress distribution characteristics and the location of fatigue failure in the test air duct, at least one strain gauge sensor is arranged to test the fatigue stress in the test air duct.

[0106] When conducting vibration tests on the system, multiple vibration acceleration sensors are arranged at the locations of the test duct, the cooling fan, and the traction fan to test the vibration transmission characteristics of the duct system simulated operation test bench.

[0107] In accordance with the above steps, for the vibration test of the fan-duct system, multiple vibration acceleration sensors were arranged at the key structural components of the test duct, cooling fan and traction fan to test the vibration transmission characteristics of the traction motor cooling fan-duct system.

[0108] S203, change the blocking status of the air inlet of the cooling fan and / or the air outlet of the traction fan to obtain a second simulated working condition, and apply the second simulated working condition to the air duct system simulation operation test bench, collect sensor data corresponding to the sensors arranged in the air duct system simulation operation test bench, so as to simulate and test the simulated working conditions with different degrees of blocking.

[0109] Regarding step S203 above, in specific implementation, the first simulated operating condition in step S201 is changed by altering the blockage of the air inlet of the cooling fan and / or the air outlet of the traction fan to obtain the second simulated operating condition. This second simulated operating condition is then applied to the duct system simulation test bench, collecting sensor data from the sensors arranged on the bench to simulate operating conditions with different degrees of blockage. Specifically, the HBM data acquisition module collects sensor data arranged on the duct system simulation test bench to conduct modal, vibration, aerodynamic load, and fatigue stress analyses of the traction motor cooling fan-duct system. This provides data support for cooling fan selection and duct structure system design verification, promoting the safe operation of high-speed trains.

[0110] Specifically, regarding step S203 above, changing the blocking status of the air inlet of the cooling fan and / or the air inlet of the traction fan to obtain the second simulated operating condition includes:

[0111] Scenario 1: For the air inlet of the cooling fan, the sealing area of ​​the air inlet of the cooling fan is changed by using the tape to obtain the second simulated working condition.

[0112] Regarding the above situation one, in specific implementation, when only the air inlet of the cooling fan is blocked in the first simulated working condition, if you want to change the first simulated working condition, you need to use tape to change the blocking area of ​​the air inlet of the cooling fan to obtain the second simulated working condition.

[0113] Scenario 2: For the air outlet of the traction fan, the percentage of the air inlet of the traction fan is blocked by the flip cover plate of the blocking area adjustment mechanism to obtain the second simulated working condition.

[0114] Regarding the second scenario mentioned above, in specific implementation, if only the outlet of the traction fan is blocked in the first simulated operating condition, and if the first simulated operating condition is to be changed, the percentage of the traction fan's inlet to be blocked needs to be adjusted by using the flip-up cover of the blocking area adjustment mechanism to obtain the second simulated operating condition.

[0115] Scenario 3: For the air inlet of the cooling fan, the sealing area of ​​the air inlet of the cooling fan is changed by using the tape to obtain the third simulated sub-condition; for the air outlet of the traction fan, the sealing percentage of the air inlet of the traction fan is adjusted by the flip cover plate of the sealing area adjustment mechanism to obtain the fourth simulated sub-condition; the third simulated sub-condition and the fourth simulated sub-condition are combined to obtain the second simulated condition.

[0116] Regarding scenario three above, in practical implementation, when both the air inlet of the cooling fan and the air outlet of the traction fan are blocked in the first simulation condition, changing the first simulation condition requires changing both blocking methods simultaneously. Specifically, for the air inlet of the cooling fan, the blocking area is adjusted using tape to obtain the third simulation sub-condition. For the air outlet of the traction fan, the blocking percentage of the air inlet is adjusted by the flip-up cover of the blocking area adjustment mechanism to obtain the fourth simulation sub-condition. Combining the third and fourth simulation sub-conditions yields the second simulation condition.

[0117] The duct system simulation test bench and testing methods provided in this application enable the accurate simulation of typical operating conditions that may occur in the cooling fans and duct systems of high-speed train traction motors during high-speed operation. Simultaneously, by deploying sensors, the test bench can accurately obtain the vibration, aerodynamic load, stress measurement characteristics, and vibration acceleration at all key locations in the fan and duct system. This provides data support for cooling fan selection and duct structure system design verification, promoting the safe operation of high-speed trains.

[0118] Please see Figure 3 , Figure 3 This is a schematic diagram of a test apparatus for a typical operating condition of a duct system provided in an embodiment of this application. Figure 3 As shown, the test apparatus 300 includes:

[0119] The simulation condition generation module 301 is used to simulate the fault conditions of a high-speed train during operation by blocking the air inlet of the cooling fan and / or the air outlet of the traction fan, and to generate the first simulated condition of air duct blockage.

[0120] The test module 302 is used to power on the duct system simulation test bench and apply the first simulated working condition to the duct system simulation test bench to carry out duct structure modal test, duct internal aerodynamic pressure test, structural stress test and system vibration test.

[0121] The data acquisition module 303 is used to change the blockage of the air inlet of the cooling fan and / or the air outlet of the traction fan to obtain a second simulated working condition, and apply the second simulated working condition to the air duct system simulation operation test bench, and collect sensor data corresponding to the sensors arranged in the air duct system simulation operation test bench to simulate and test the simulated working conditions with different degrees of blockage.

[0122] Furthermore, when the simulation condition generation module 301 is used to generate a first simulated working condition of air duct blockage by blocking the air inlet of the cooling fan and / or the air outlet of the traction fan to simulate the fault conditions of a high-speed train during operation, the simulation condition generation module 301 is also used to:

[0123] The air inlet of the cooling fan is sealed with tape to obtain the first simulated working condition;

[0124] or,

[0125] The air outlet of the traction fan is blocked by the flip cover of the blocking area adjustment mechanism to obtain the first simulated working condition.

[0126] or,

[0127] The air inlet of the cooling fan is sealed with tape to obtain the first simulated sub-condition;

[0128] For the air outlet of the traction fan, the air outlet of the traction fan is blocked by the flip cover plate of the blocking area adjustment mechanism to obtain the second simulated sub-condition.

[0129] The first simulated sub-condition is obtained by combining the first simulated sub-condition with the second simulated sub-condition.

[0130] Furthermore, the test module 302 is also used for:

[0131] When conducting the modal test of the duct structure, multiple acceleration sensors are arranged at multiple different positions on the lower surface of the test duct of the duct system simulation test bench, and the LMS modal acquisition and analysis system is used to collect acceleration data and analyze modal frequencies and mode shapes.

[0132] When conducting aerodynamic pressure tests inside the duct, an aerodynamic simulation analysis model of the duct structure is built using Starccm+ software to simulate the maximum aerodynamic load and its location when the airflow passes through the duct structure. Based on the simulation analysis results, aerodynamic load sensors are placed at the maximum aerodynamic load point inside the duct to test the aerodynamic load inside the duct.

[0133] When the structural stress test is carried out, the structural fatigue load simulation is performed to obtain the fatigue stress distribution characteristics of the simulated operation test bench of the air duct system. Based on the fatigue stress distribution characteristics and the location of fatigue failure in the test air duct, at least one strain gauge sensor is arranged to test the fatigue stress in the test air duct.

[0134] When conducting vibration tests on the system, multiple vibration acceleration sensors are arranged at the locations of the test duct, the cooling fan, and the traction fan to test the vibration transmission characteristics of the duct system simulated operation test bench.

[0135] Furthermore, when the data acquisition module 303 is used to change the blocking status of the air inlet of the cooling fan and / or the air inlet of the traction fan to obtain the second simulated operating condition, the data acquisition module 303 is also used to:

[0136] The second simulated working condition is obtained by changing the sealing area of ​​the air inlet of the cooling fan using the tape.

[0137] or,

[0138] For the air outlet of the traction fan, the percentage of the air inlet of the traction fan is adjusted by the flip cover of the sealing area adjustment mechanism to obtain the second simulated working condition;

[0139] or,

[0140] For the air inlet of the cooling fan, the sealing area of ​​the air inlet of the cooling fan is changed by using the tape to obtain the third simulated sub-condition;

[0141] For the air outlet of the traction fan, the percentage of the air inlet of the traction fan is adjusted by the flip cover of the sealing area adjustment mechanism to obtain the fourth simulated sub-condition.

[0142] The third simulated sub-condition is combined with the fourth simulated sub-condition to obtain the second simulated condition.

[0143] Please see Figure 4 , Figure 4 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 4 As shown, the electronic device 400 includes a processor 410, a memory 420, and a bus 430.

[0144] The memory 420 stores machine-readable instructions executable by the processor 410. When the electronic device 400 is running, the processor 410 communicates with the memory 420 via the bus 430. When the machine-readable instructions are executed by the processor 410, they can perform the operations described above. Figure 2 The steps of the test method for typical operating conditions of the air duct system in the method embodiment shown are described in the method embodiment for specific implementation, and will not be repeated here.

[0145] This application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, can perform the above-described actions. Figure 2 The steps of the test method for typical operating conditions of the air duct system in the method embodiment shown are described in the method embodiment for specific implementation, and will not be repeated here.

[0146] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0147] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0148] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0149] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0150] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0151] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In addition, the terms "first", "second", "third", etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0152] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The scope of protection of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the scope of the technology disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method of testing a wind tunnel system under typical operating conditions, characterized by, The test method is applied to a wind channel system simulation running test bench for simulating a fan wind channel system, the wind channel system simulation running test bench is fixed on the ground by a support structure, and the wind channel system simulation running test bench comprises: a test wind channel, which is a test main body of the fan wind channel system; a cooling fan installed on the test wind channel for providing a source of air volume of the entire fan wind channel system; a hard wind channel for connecting the test wind channel and a traction fan, and changing the gas flow in the hard wind channel by adjusting an internal rotating cover plate, so as to simulate the working conditions of different blockage degrees of the air outlet of the traction fan; a soft wind channel for perfecting the integrity of the fan wind channel system and embodying the real situation of the fan wind channel system when the vehicle is installed; a traction fan connected at a corresponding position of the test wind channel through the hard wind channel and the soft wind channel; a plurality of acceleration sensors for measuring the acceleration in the test wind channel; a pneumatic load sensor for measuring the pneumatic load in the test wind channel; a plurality of strain gauge sensors for measuring the fatigue stress in the test wind channel; and a plurality of vibration acceleration sensors for measuring the vibration acceleration of the test wind channel, the traction fan and the cooling fan. The test method comprises: By plugging the air inlet of the cooling fan and / or the air outlet of the traction fan, the fault working condition of the high-speed train in the running process is simulated, and the first simulation working condition of the wind channel plugging is generated; The wind channel system simulation running test bench is powered on, the first simulation working condition is applied to the built wind channel system simulation running test bench, and the wind channel structure modal test, the wind channel internal pneumatic pressure test, the structure stress test and the system vibration test are carried out; The plugging condition of the air inlet of the cooling fan and / or the air outlet of the traction fan is changed to obtain a second simulation working condition, and the second simulation working condition is applied to the wind channel system simulation running test bench, and the sensor data corresponding to the sensors arranged in the wind channel system simulation running test bench is collected to simulate and test the simulation working condition of different plugging degrees.

2. The test method of claim 1, wherein, The first simulation working condition of the wind channel plugging is generated by plugging the air inlet of the cooling fan and / or the air outlet of the traction fan to simulate the fault working condition of the high-speed train in the running process, comprising: For the air inlet of the cooling fan, the air inlet is plugged by using adhesive tape to obtain the first simulation working condition; Or, For the air outlet of the traction fan, the air outlet of the traction fan is plugged by the turnover cover plate of the plugging area adjusting mechanism to obtain the first simulation working condition; Or, For the air inlet of the cooling fan, the air inlet is plugged by using adhesive tape to obtain a first simulation sub-working condition; For the air outlet of the traction fan, the air outlet of the traction fan is plugged by the turnover cover plate of the plugging area adjusting mechanism to obtain a second simulation sub-working condition; The first simulation sub-working condition and the second simulation sub-working condition are combined to obtain the first simulation working condition.

3. The test method of claim 1, wherein, The test method further comprises: When the wind channel structure modal test is carried out, a plurality of acceleration sensors are arranged at a plurality of different positions of the lower surface of the test wind channel of the wind channel system simulation running test bench respectively, acceleration data acquisition and modal frequency and mode shape analysis are carried out by using an LMS modal acquisition and analysis system; When the wind channel internal aerodynamic pressure test is carried out, a wind channel structure aerodynamic simulation analysis model is built by using Starccm+ software, the maximum aerodynamic load and the position of the airflow when passing through the wind channel structure are simulated, and according to the simulation analysis result, an aerodynamic load sensor is arranged at the maximum aerodynamic load point in the wind channel to test the wind channel internal aerodynamic load; When the structure stress test is carried out, structure fatigue load simulation is carried out to obtain the fatigue stress distribution characteristics of the wind channel system simulation running test bench, at least one strain gauge sensor is arranged to test the fatigue stress in the test wind channel according to the fatigue stress distribution characteristics and the position of the fatigue damage in the test wind channel; When the system vibration test is carried out, a plurality of vibration acceleration sensors are arranged at the positions of the test wind channel, the cooling fan and the traction fan to test the vibration transmission characteristics of the wind channel system simulation running test bench.

4. The test method of claim 2, wherein, The blocking condition of the air inlet of the cooling fan and / or the air inlet of the traction fan is changed to obtain a second simulation working condition, which comprises: for the air inlet of the cooling fan, the blocking area of the air inlet of the cooling fan is changed by using the adhesive tape to obtain the second simulation working condition; or, for the air outlet of the traction fan, the blocking percentage of the air inlet of the traction fan is adjusted by the turnover cover plate of the blocking area adjusting mechanism to obtain the second simulation working condition; or, for the air inlet of the cooling fan, the blocking area of the air inlet of the cooling fan is changed by using the adhesive tape to obtain a third simulation sub-working condition; for the air outlet of the traction fan, the blocking percentage of the air inlet of the traction fan is adjusted by the turnover cover plate of the blocking area adjusting mechanism to obtain a fourth simulation sub-working condition; the third simulation sub-working condition and the fourth simulation sub-working condition are combined to obtain the second simulation working condition.

5. A test device for testing a typical working condition of an air duct system, characterized in that, The test test device comprises: a simulation working condition generation module, which is used for simulating the fault working condition of the high-speed train in the running process by blocking the air inlet of the cooling fan and / or the air outlet of the traction fan, and generating a first simulation working condition of wind channel blocking; a test test module, which is used for powering on the wind channel system simulation running test bench, applying the first simulation working condition in the built wind channel system simulation running test bench, and carrying out wind channel structure modal test, wind channel internal aerodynamic pressure test, structure stress test and system vibration test. The data acquisition module is used for changing the plugging condition of the air inlet of the cooling fan and / or the air outlet of the traction fan, obtaining a second simulation working condition, applying the second simulation working condition in the air duct system simulation running test bench, and collecting sensor data corresponding to the sensors arranged in the air duct system simulation running test bench to simulate and test the simulation working condition with different plugging degrees.

6. A test testing device according to claim 5, characterised in that When the simulation working condition generation module is used for generating a first simulation working condition of air duct plugging by plugging the air inlet of the cooling fan and / or the air outlet of the traction fan to simulate the fault working condition of the high-speed train in the running process, the simulation working condition generation module is further used for: For the air inlet of the cooling fan, the air inlet is plugged by using a tape to obtain the first simulation working condition; Or, For the air outlet of the traction fan, the air outlet of the traction fan is plugged by the turnover cover plate of the plugging area adjusting mechanism to obtain the first simulation working condition; Or, For the air inlet of the cooling fan, the air inlet is plugged by using a tape to obtain a first simulation sub-working condition; For the air outlet of the traction fan, the air outlet of the traction fan is plugged by the turnover cover plate of the plugging area adjusting mechanism to obtain a second simulation sub-working condition; The first simulation sub-working condition and the second simulation sub-working condition are combined to obtain the first simulation working condition.

7. An electronic device, comprising: Comprise: A processor, a memory and a bus, the memory stores machine readable instructions executable by the processor, when the electronic device is running, the processor and the memory communicate through the bus, the machine readable instructions are executed by the processor to execute the steps of the test test method of the typical working condition of the air duct system in any one of claims 1 to 4.

8. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the computer program is executed by the processor to execute the steps of the test test method of the typical working condition of the air duct system in any one of claims 1 to 4.

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