WO2024067487A1

WO2024067487A1 - Air duct system simulation operation test bench and experiment test method

Info

Publication number: WO2024067487A1
Application number: PCT/CN2023/121116
Authority: WO
Inventors: 丁鑫; 张磊; 党鹏; 张永胜
Original assignee: 中车长春轨道客车股份有限公司
Priority date: 2022-09-30
Filing date: 2023-09-25
Publication date: 2024-04-04
Also published as: CN115876426A

Abstract

An air duct system simulation operation test bench (100). The air duct system simulation operation test bench (100) comprises: a test air duct (101), which is a test main body of a fan air duct system; a cooling fan (102), which is mounted on the test air duct (101) and is used for providing an air volume source for the entire fan air duct system; a hard air duct (103), which is connected to the test air duct (101) and a traction fan (105), the flow rate of air in the hard air duct (103) being changed by means of adjustment of an internal rotary cover plate, so as to simulate working conditions for different degrees of blockage at an air outlet of the traction fan (105); a soft air duct (104), which is used for perfecting the integrity of the fan air duct system, so as to reflect the real situations of the fan air duct system during installation on trains; and a traction fan (105), which is connected to a corresponding position on the test air duct (101) by means of the hard air duct (103) and the soft air duct (104). Also provided are an experiment test method and experiment test device (300) for the typical working condition of an air duct system, an electronic apparatus (400) and a computer-readable storage medium. The air duct system simulation operation test platform (100) and the test method provide data support for the model selection of cooling fans and the design verification of air duct structure systems, and facilitate the safe operation of high-speed multiple-unit trains.

Description

A duct system simulation operation test bench and test method

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of Chinese patent application No. 202211207927.3 filed with the State Intellectual Property Office of China on September 30, 2022, and entitled “A Duct System Simulation Operation Test Bench and Experimental Testing Method”, the entire contents of which are incorporated by reference into this application.

Technical Field

The present application relates to the technical field of motor design, and in particular to an air duct system simulation operation test bench and an experimental test method.

Background technique

There are different types of on-board equipment in high-speed EMUs, and these equipment have different functions to meet the high-speed, safe and smooth operation requirements of the vehicle. The traction motor cooling fan and air duct system are typical on-board auxiliary functional equipment. Its main function is to continuously supply cooling air to the high-speed rotating motor installed on the running parts to ensure its safe operation. Since the cooling fan is an active vibration device, the high-speed rotation of the auxiliary motor will generate vibration. At the same time, the circulation of the high-pressure airflow formed by the compressor in the air duct will generate airflow fluctuations, and the fluctuation frequency is related to the internal structure of the air duct. Therefore, the traction motor cooling fan and air duct system are one of the vibration sources of the high-speed EMU body that cannot be ignored.

In the traditional vehicle design and verification process, since the air duct structure is fixed between the car body and the bogie structure, all positions have high sealing requirements. It is difficult to arrange sensors inside or outside the narrow air duct structure to monitor the vibration and strength of the air duct structure during actual operation. The pressure distribution inside the air duct under normal working conditions of the fan can only be predicted by simulation analysis, but it is impossible to accurately evaluate whether the structural vibration and strength meet the requirements. At the same time, the traditional cooling fan test bench generally only considers the load change of the fan itself, and does not introduce the air duct with the structural characteristics of the actual vehicle into the test platform, so it cannot truly simulate the actual load change of the fan on the vehicle. However, in recent years, high-speed EMU vehicles have experienced abnormal vibrations with high amplitudes on the floor above the air duct during driving. What's worse, cracks were found in the air duct structure of some vehicles when they were checked after being dropped off. In the face of the above problems, it is impossible to analyze and find the causes through the vibration or stress data of the non-air duct crack position obtained by existing simulation analysis methods or line tests, and it is even more difficult to accurately and reasonably propose solutions.

Summary of the invention

In view of this, the purpose of the present application is to provide a duct system simulation operation test bench and test method. By building an air duct system simulation operation test bench, it is possible to accurately simulate the typical operating conditions that may occur in the cooling fan and air duct system of the traction motor of a high-speed EMU during the high-speed operation of the vehicle. At the same time, by arranging sensors, the vibration, aerodynamic load, stress measured characteristics and vibration acceleration of all key positions in the fan duct system can be accurately obtained, thereby providing data support for the selection of cooling fans and the design verification of the air duct structure system, and promoting the safe operation of high-speed EMU vehicles.

In a first aspect, an embodiment of the present application provides a duct system simulation operation test bench, the duct system simulation operation test bench is used to simulate a fan duct system, the duct system simulation operation test bench is fixed on a platform through a supporting structure, and the duct system simulation operation test bench includes:

The test air duct is the test subject of the fan air duct system;

A cooling fan, installed on the test air duct, for providing a source of air volume for the entire fan air duct system;

A hard air duct is used to connect the test air duct and the traction fan, and the gas flow rate in the hard air duct is changed by adjusting the internal rotating cover plate, so as to simulate the working conditions of different blockage degrees of the air outlet of the traction fan;

The soft air duct is used to improve the integrity of the fan air duct system and reflect the actual situation of the fan air duct system when it is actually installed on the vehicle;

A traction fan is connected to a corresponding position of the test air duct through the hard air duct and the soft air duct.

Furthermore, the air duct system simulation operation test bench also includes:

A plurality of acceleration sensors, used for measuring the acceleration in the test air duct;

An aerodynamic load sensor, used for measuring the aerodynamic load in the test air duct;

a plurality of strain gauge sensors for measuring fatigue stress in the test air duct;

A plurality of vibration acceleration sensors are used to measure the vibration acceleration of the test air duct, the traction fan and the cooling fan.

In a second aspect, the embodiment of the present application further provides a test method for a typical working condition of an air duct system, the test method using the air duct system simulation operation test bench provided in the embodiment of the present application, the test method comprising:

By blocking the air inlet of the cooling fan and/or the air outlet of the traction fan, a possible fault condition of the high-speed train during operation is simulated to generate a first simulated condition of air duct blocking;

Powering on the air duct system simulation operation test bench, applying the first simulation working condition to the constructed air duct system simulation operation test bench to carry out air duct structure modal test, air duct internal pneumatic pressure test, structural stress test and system vibration test;

The blocking conditions of the air inlet of the cooling fan and/or the air outlet of the traction fan are changed to obtain a second simulated operating condition, and the second simulated operating condition is applied to the air duct system simulation operation test bench, and sensor data corresponding to the sensors arranged in the air duct system simulation operation test bench are collected to perform simulation tests on simulated operating conditions with different degrees of blocking.

Furthermore, the method of blocking the air inlet of the cooling fan and/or the air outlet of the traction fan to simulate a possible fault condition of the high-speed train during operation and generate a first simulated condition of air duct blocking includes:

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

or,

The air outlet of the traction fan is blocked by a flip cover of the blocking area adjustment mechanism to obtain the first simulated working condition;

or,

The air inlet of the cooling fan is sealed with adhesive tape to obtain a first simulated sub-operating condition;

The air outlet of the traction fan is blocked by a flip cover of the blocking area adjustment mechanism to obtain a second simulation sub-operating condition;

The first simulation sub-operating condition is combined with the second simulation sub-operating condition to obtain the first simulation operating condition.

Furthermore, the experimental test method also includes:

When carrying out the duct structure modal test, a plurality of acceleration sensors are arranged at a plurality of different positions on the lower surface of the test duct of the duct system simulation operation test bench, and an LMS modal acquisition and analysis system is used to collect acceleration data and perform modal frequency and vibration type analysis;

When conducting the aerodynamic pressure test inside the air duct, an aerodynamic simulation analysis model of the air duct structure is built through the Starccm+ software to simulate the maximum aerodynamic load and position of the airflow when passing through the air duct structure. According to the simulation analysis results, a pneumatic load sensor is arranged at the maximum aerodynamic load point inside the air duct to test the aerodynamic load inside the air duct;

When carrying out the structural stress test, a structural fatigue load simulation is performed to obtain the fatigue stress distribution characteristics of the simulated operation test bench of the air duct system, and at least one strain gauge sensor is arranged to test the fatigue stress in the test air duct in combination with the fatigue stress distribution characteristics and the location where fatigue damage occurs in the test air duct;

When the system vibration test is carried out, a plurality of vibration acceleration sensors are arranged at the positions of the test air duct, the cooling fan and the traction fan respectively to test the vibration transmission characteristics of the air duct system simulation operation test bench.

Furthermore, the blocking condition of the air inlet of the cooling fan and/or the air inlet of the traction fan is changed. The second simulation condition is obtained, including:

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 simulated 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 flip cover of the blocking area adjustment mechanism to obtain the second simulated 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 the third simulation sub-operating condition;

For the air outlet of the traction fan, the blocking percentage of the air inlet of the traction fan is adjusted by the flip cover of the blocking area adjustment mechanism to obtain the fourth simulation sub-operating condition;

The third simulation sub-operating condition is combined with the fourth simulation sub-operating condition to obtain the second simulation operating condition.

In a third aspect, the embodiment of the present application further provides a test device for a typical working condition of an air duct system, the test device comprising:

A simulation condition generation module, used to simulate a possible fault condition of a high-speed train during operation by blocking an air inlet of a cooling fan and/or an air outlet of a traction fan, and generate a first simulation condition of air duct blocking;

An experimental test module, used to power on the air duct system simulation operation test bench, apply the first simulation working condition to the constructed air duct system simulation operation test bench, so as to carry out air duct structure modal test, air duct internal pneumatic pressure test, structural stress test and system vibration test;

A data acquisition module is used to change the blocking condition 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, and collect sensor data corresponding to the sensors arranged in the air duct system simulation operation test bench to simulate tests on simulated operating conditions with different degrees of blocking.

Further, when the simulated operating condition generation module is used to block the air inlet of the cooling fan and/or the air outlet of the traction fan to simulate a possible fault operating condition of the high-speed train during operation and generate a first simulated operating condition of air duct blocking, the simulated operating condition generation module is also used to:

or,

For the air outlet of the traction fan, the flip cover of the blocking area adjustment mechanism is used to adjust the air outlet of the traction fan. The air outlet is blocked to obtain the first simulated working condition;

or,

The air outlet of the traction fan is blocked by a flip cover plate of the blocking area adjustment mechanism to obtain a second simulation sub-operating condition;

In a fourth aspect, an embodiment of the present application further provides an electronic device, comprising: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor communicates with the memory through the bus, and when the machine-readable instructions are executed by the processor, the steps of the experimental test method for typical working conditions of the air duct system are performed as described above.

In a fifth aspect, an embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the experimental test method for typical working conditions of the air duct system as described above are executed.

Through the air duct system simulation operation test bench and experimental test method provided in this application, by building an air duct system simulation operation test bench, it is possible to accurately simulate the typical operating conditions that may occur in the cooling fan and air duct system of the traction motor of a high-speed EMU during the high-speed operation of the vehicle, and at the same time, by arranging sensors, the vibration, aerodynamic load, stress measured characteristics and vibration acceleration of all key positions in the fan air duct system can be accurately obtained, providing data support for the selection of cooling fans and the design verification of the air duct structure system, thereby promoting the safe operation of high-speed EMU vehicles.

In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic diagram of the hardware structure of an air duct system simulation operation test bench provided in an embodiment of the present application;

FIG2 is a flow chart of a test method for a typical working condition of an air duct system provided in an embodiment of the present application;

FIG3 is a schematic diagram of the structure of a test device for a typical working condition of an air duct system provided in an embodiment of the present application;

FIG. 4 is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

Detailed ways

In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application usually described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, each other embodiment obtained by those skilled in the art without making creative work belongs to the scope of protection of the present application.

First, the application scenarios to which the present application is applicable are introduced. The present application can be applied in the field of motor design technology.

According to research, in the traditional vehicle design and verification process, since the air duct structure is fixed between the car body and the bogie structure, all positions have high sealing requirements. It is difficult to arrange sensors inside or outside the narrow air duct structure to monitor the vibration and strength of the air duct structure during actual operation. The pressure distribution inside the air duct under normal working conditions of the fan can only be predicted by simulation analysis, but it is impossible to accurately evaluate whether the structural vibration and strength meet the requirements. At the same time, the traditional cooling fan test bench generally only considers the load change of the fan itself, and does not introduce the air duct with the structural characteristics of the actual vehicle into the test platform, so it cannot truly simulate the actual load change of the fan on the vehicle. However, in recent years, high-speed EMU vehicles have experienced abnormal vibrations with high amplitudes on the floor above the air duct during driving. What's worse, cracks were found in the air duct structure of some vehicles when they were checked after being dropped off. In the face of the above problems, it is impossible to analyze and find the causes through the vibration or stress data of the non-air duct crack position obtained by existing simulation analysis methods or line tests, and it is even more difficult to accurately and reasonably propose solutions.

Based on this, the embodiment of the present application provides a duct system simulation operation test bench and experimental testing method, 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 EMU vehicles.

Please refer to FIG1, which is a schematic diagram of the hardware structure of an air duct system simulation operation test bench provided in an embodiment of the present application. As shown in FIG1, the air duct system simulation operation test bench 100 provided in an embodiment of the present application is used to The air duct system of the machine is simulated, and the air duct system simulation operation test bench 100 is fixed on the platform through a supporting structure. The air duct system simulation operation test bench 100 includes:

The test air duct 101 is a test body of the fan air duct system.

Here, the test air duct 101 is the test body of the fan air duct system, which is used to guide the airflow between the cooling fan 102 and the traction fan 105. Considering the requirements for the distribution of stress and pressure inside the air duct, it is necessary to open several equipment installation holes at the upper cover of the test air duct 101, and seal them after the test points are fully arranged; in addition, considering the need to adjust the test points during the test, it is recommended that the sealing device at the opening position of the upper cover be designed to be easy to disassemble and assemble.

The cooling fan 102 is installed on the test air duct and is used to provide an air volume source for the entire fan air duct system.

Here, the cooling fan 102 is used to drive air to flow through the entire air duct system simulation operation test bench 100 and provide a suitable air flow. According to the embodiment provided by the present application, the cooling fan 102 is preferably selected from the fan of the vehicle group where the problem air duct cracks or abnormal vibration problems are reported, and is used to provide the air volume source for the entire system.

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

Here, the hard air duct 103 is connected between the test air duct 101 and the traction fan 105, and a blocking area adjustment mechanism is provided in the hard air duct 103, and the blocking area adjustment mechanism is used to adjust the flip cover in the hard air duct 103, and the flip cover is connected to the adjustment mechanism through an axis. When the flip cover is perpendicular to the cross section of the hard air duct, the blocking percentage is 0, and when the flip cover coincides with the cross section of the hard air duct, the blocking percentage is 100%. In between, the required blocking percentage can be calculated by the percentage of the projection area of the flip cover on the cross section of the hard air duct and the cross section area of the hard air duct. When adjusted to the required percentage, the angle of the flip cover can be fixed by the slot on the axis. In this way, the gas flow in the hard air duct 103 can be changed by adjusting the rotating cover inside the hard air duct 103, thereby simulating the working conditions of different blockage degrees of the air outlet of the traction fan 105.

The soft air duct 104 is used to improve the integrity of the fan air duct system and reflect the actual situation of the fan air duct system when it is actually installed in the vehicle.

The traction fan 105 is connected to the corresponding position of the test air duct 101 through the hard air duct 103 and the soft air duct 104 .

Furthermore, the air duct system simulation operation test bench 100 also includes:

A plurality of acceleration sensors are used to measure the acceleration in the test wind duct.

Here, the acceleration sensors may be disposed at different positions on the lower surface of the test air duct 101 to detect the acceleration of the air volume at different positions in the test air duct 101 .

The aerodynamic load sensor is used to measure the aerodynamic load in the test air duct 101 .

Here, the pneumatic load sensor needs to be arranged at the position of the maximum pneumatic load point inside the test air duct 101 , so as to test the pneumatic load inside the test air duct 101 .

A plurality of strain gauge sensors are used to measure fatigue stress in the test air duct.

Here, the strain gauge sensor needs to be arranged at the position where fatigue failure occurs in the test air duct 101 to detect the fatigue stress at the fatigue failure position.

A plurality of 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 .

Here, a plurality of vibration acceleration sensors are respectively disposed at positions corresponding to the test air duct 101 , the traction fan 105 , and the cooling fan 102 , for detecting the vibration acceleration of the test air duct 101 , the traction fan 105 , and the cooling fan 102 .

According to an embodiment of the present application, the present application also provides a test method for a typical working condition of an air duct system. Please refer to Figure 2, which is a flow chart of a test method for a typical working condition of an air duct system provided in an embodiment of the present application. As shown in Figure 2, the test method provided in the embodiment of the present application utilizes the air duct system simulation operation test bench provided in the embodiment of the present application, and the test method includes:

S201, by blocking the air inlet of the cooling fan and/or the air outlet of the traction fan, a possible fault condition of the high-speed train during operation is simulated to generate a first simulated condition of air duct blocking.

For the above step S201, in the specific implementation, after the air duct system simulation operation test bench is built, the air inlet of the cooling fan and/or the air outlet of the traction fan are blocked to simulate the failure conditions that may occur during the operation of the high-speed train, and generate the first simulation condition of the air duct blocking.

When generating the first simulated working condition, only the air inlet of the cooling fan can be blocked, only the air inlet of the traction fan can be blocked, or both the air inlet of the cooling fan and the air inlet of the traction fan can be blocked to simulate possible cross-combination working conditions. Specifically, with respect to the above step S201, the first simulated working condition of air duct blocking is generated by blocking the air inlet of the cooling fan and/or the air outlet of the traction fan to simulate possible fault conditions that may occur during the operation of the high-speed train, including the following three situations.

Case 1: The air inlet of the cooling fan is blocked with tape to obtain the first simulated working condition.

In view of the above situation 1, in the specific implementation, the air inlet of the cooling fan is blocked with tape to obtain the first simulated working condition. Different blocking degrees can be simulated in turn to reveal the effect of the cooling fan air inlet volume on the vibration of the fan duct system. The influence rules.

or,

Case 2: For the air outlet of the traction fan, 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.

For the above situation 2, for the air outlet of the traction motor, the flip cover of the hard air duct is adjusted by the blocking area adjustment mechanism. The flip cover is connected to the adjustment mechanism through an axis. When the rotating cover is perpendicular to the cross section of the hard air duct, the blocking percentage is 0. When the rotating cover coincides with the cross section of the hard air duct, the blocking area is 100%. In between, the required blocking percentage can be calculated by calculating the percentage of the projection area of the rotating cover on the cross section of the hard air duct and the cross-sectional area of the hard air duct. When adjusted to the required percentage, the angle of the cover can be fixed by the slot on the shaft. In this way, for the air outlet of the traction fan, 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.

or,

Case three: 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 with the flip cover of the sealing area adjustment mechanism to obtain the second simulated sub-condition; the first simulated sub-condition is combined with the second simulated sub-condition to obtain the first simulated condition.

For the above situation three, in the specific implementation, the air inlet of the cooling fan is blocked with tape to obtain the first simulated sub-operating condition; the air outlet of the traction fan is blocked by the flip cover of the blocking area adjustment mechanism to obtain the second simulated sub-operating condition; the first simulated sub-operating condition is combined with the second simulated sub-operating condition to obtain the first simulated operating condition. In this way, the air inlet of the cooling fan and the air outlet of the traction motor can be blocked at the same time to simulate the possible cross-combination operating conditions.

S202, power on the air duct system simulation operation test bench, and apply the first simulation working condition to the constructed air duct system simulation operation test bench to carry out air duct structure modal test, air duct internal pneumatic pressure test, structural stress test and system vibration test.

Regarding the above step S202, during the specific implementation, the air duct system simulation operation test bench is powered on, and the first simulation working condition is applied to the constructed air duct system simulation operation test bench to carry out air duct structure modal test, air duct internal pneumatic pressure test, structural stress test and system vibration test.

Specifically, the test method provided in the embodiment of the present application also includes:

When carrying out the duct structure modal test, the test duct of the duct system simulation operation test bench is respectively Multiple acceleration sensors are arranged at different positions on the lower surface of the vehicle, and the LMS modal acquisition and analysis system is used to collect acceleration data and perform modal frequency and vibration type analysis.

In view of the above steps, for the modal test of the duct structure, acceleration sensors are arranged at multiple different positions on the lower surface of the test duct, and the LMS modal acquisition and analysis system is used to collect acceleration data and perform modal frequency and vibration type analysis.

When carrying out the aerodynamic pressure test inside the air duct, an aerodynamic simulation analysis model of the air duct structure is built using the Starccm+ software to simulate the maximum aerodynamic load and position of the airflow when passing through the duct structure. According to the simulation analysis results, a pneumatic load sensor is arranged at the maximum aerodynamic load point inside the air duct to test the aerodynamic load inside the air duct.

In view of the above steps, for the internal aerodynamic pressure test of the air duct, the aerodynamic simulation analysis model of the air duct structure is first built through the Starccm+ software to simulate the maximum aerodynamic load and position of the airflow when passing through the air duct structure. According to the simulation analysis results, sensors are arranged at the maximum aerodynamic load point inside the air duct to test the internal aerodynamic load of the air duct.

When carrying out the structural stress test, a structural fatigue load simulation is performed to obtain the fatigue stress distribution characteristics of the air duct system simulated operation test bench. Combined with the fatigue stress distribution characteristics and the location where fatigue damage occurs in the test air duct, at least one strain gauge sensor is arranged to test the fatigue stress in the test air duct.

According to the above steps, for the duct structure stress test, structural fatigue load simulation is performed to obtain the fatigue stress distribution characteristics of the duct system simulation operation test bench. Combined with the fatigue stress distribution characteristics and the location where fatigue damage occurs in the test duct, at least one strain gauge sensor is arranged to test the fatigue stress in the test duct.

In view of the above steps, for the vibration test of the fan-duct system, multiple vibration acceleration sensors are arranged at the key structural components of the test air duct, cooling fan and traction fan to test the vibration transmission characteristics of the traction motor cooling fan-duct system.

S203, changing the blocking condition 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 applying the second simulated operating condition to the air duct system simulated operation test bench, collecting sensor data corresponding to the sensors arranged in the air duct system simulated operation test bench, so as to perform simulation tests on simulated operating conditions with different blocking degrees.

For the above step S203, in the specific implementation, the first simulated working condition in step S201 is changed, the blocking conditions of the air inlet of the cooling fan and/or the air outlet of the traction fan are changed, and the second simulated working condition is obtained. The HBM data acquisition module collects sensor data arranged in the air duct system simulation test bench to simulate the working conditions with different blocking degrees. Specifically, the HBM data acquisition module collects sensor data arranged in the air duct system simulation test bench to carry out modal, vibration, aerodynamic load and fatigue stress analysis of the traction motor cooling fan-air duct system, providing data support for the selection of cooling fans and the design verification of the air duct structure system, and promoting the safe operation of high-speed EMU vehicles.

Specifically, with respect to the above step S203, the blocking condition of the air inlet of the cooling fan and/or the air inlet of the traction fan is changed to obtain the second simulated working condition, including:

Case 1: For the air inlet of the cooling fan, the adhesive tape is used to change the blocking area of the air inlet of the cooling fan to obtain the second simulated working condition.

Regarding the above situation 1, in the 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.

or,

Case 2: For the air outlet of the traction fan, the blocking percentage of the air inlet of the traction fan is adjusted by the flip cover of the blocking area adjustment mechanism to obtain the second simulated working condition.

Regarding the second situation mentioned above, in the specific implementation, when only the air outlet of the traction fan is blocked in the first simulated working condition, if you want to change the first simulated working condition, you need to adjust the blocking percentage of the air inlet of the traction fan through the flip cover of the blocking area adjustment mechanism to obtain the second simulated working condition.

or,

Case three: For the air inlet of the cooling fan, the tape is used to change the blocking area of the air inlet of the cooling fan to obtain the third simulated sub-condition; for the air outlet of the traction fan, the blocking percentage of the air inlet of the traction fan is adjusted by the flip cover of the blocking area adjustment mechanism to obtain the fourth simulated sub-condition; the third simulated sub-condition is combined with the fourth simulated sub-condition to obtain the second simulated condition.

For the above situation three, in the specific implementation, when the air inlet of the cooling fan and the air outlet of the traction fan are blocked at the same time in the first simulation condition, if you want to change the first simulation condition, you need to change the two blocking conditions at the same time. Specifically, for the air inlet of the cooling fan, use the tape to change the blocking area of the air inlet of the cooling fan to obtain the third simulation sub-condition, and for the air outlet of the traction fan, adjust the blocking percentage of the air inlet of the traction fan through the flip cover of the blocking area adjustment mechanism to obtain the fourth simulation sub-condition; combine the third simulation sub-condition with the fourth simulation sub-condition. The sub-operating conditions are combined to obtain the second simulation operating condition.

Please refer to FIG3 , which is a schematic diagram of a test device for a typical working condition of an air duct system provided in an embodiment of the present application. As shown in FIG3 , the test device 300 includes:

The simulation condition generating module 301 is used to simulate the possible fault condition of the high-speed train during operation by blocking the air inlet of the cooling fan and/or the air outlet of the traction fan, and generate a first simulation condition of air duct blocking;

The test module 302 is used to power on the air duct system simulation operation test bench, apply the first simulation working condition to the constructed air duct system simulation operation test bench, so as to carry out air duct structure modal test, air duct internal pneumatic pressure test, structural stress test and system vibration test;

The data acquisition module 303 is used to change the blocking condition 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, and collect sensor data corresponding to the sensors arranged in the air duct system simulation operation test bench to simulate tests on simulated operating conditions with different degrees of blocking.

Furthermore, when the simulated operating condition generation module 301 is used to block the air inlet of the cooling fan and/or the air outlet of the traction fan to simulate a possible fault operating condition of the high-speed train during operation and generate a first simulated operating condition of air duct blocking, the simulated operating condition generation module 301 is also used to:

or,

Furthermore, the experimental test module 302 is also used for:

Further, when the data acquisition module 303 is used to change the blocking condition of the air inlet of the cooling fan and/or the air inlet of the traction fan to obtain the second simulated working condition, the data acquisition module 303 is also used to:

or,

Please refer to Fig. 4, which is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. As shown in Fig. 4, the electronic device 400 includes a processor 410, a memory 420 and a bus 430.

The memory 420 stores machine-readable instructions executable by the processor 410. When the processor 410 and the memory 420 communicate with each other through the bus 430, when the machine-readable instructions are executed by the processor 410, the steps of the experimental test method for the typical working conditions of the air duct system in the method embodiment shown in Figure 2 can be executed. The specific implementation method can be found in the method embodiment, which will not be repeated here.

An embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the experimental test method for typical working conditions of the air duct system in the method embodiment shown in Figure 2 above can be executed. The specific implementation method can be found in the method embodiment, which will not be repeated here.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that can be executed by a processor. Based on this understanding, the technical solution of the present application can essentially or partly contribute to the prior art or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program codes.

It should be noted that similar reference numerals and letters refer to similar items in the following drawings, and therefore, whenever an item is referred to in a If a first, second, or third term is defined in a figure, there is no need to further define or explain it in subsequent figures. In addition, the terms "first,""second,""third," etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-mentioned embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

A duct system simulation operation test bench, characterized in that the duct system simulation operation test bench is used to simulate a fan duct system, the duct system simulation operation test bench is fixed on a platform through a supporting structure, and the duct system simulation operation test bench comprises:

The test air duct is the test subject of the fan air duct system;

A cooling fan, installed on the test air duct, for providing a source of air volume for the entire fan air duct system;

A hard air duct is used to connect the test air duct and the traction fan, and the gas flow rate in the hard air duct is changed by adjusting the internal rotating cover plate, so as to simulate the working conditions of different blockage degrees of the air outlet of the traction fan;

The soft air duct is used to improve the integrity of the fan air duct system and reflect the actual situation of the fan air duct system when it is actually installed on the vehicle;

A traction fan is connected to a corresponding position of the test air duct through the hard air duct and the soft air duct.
The air duct system simulation operation test bench according to claim 1 is characterized in that the air duct system simulation operation test bench also includes:

A plurality of acceleration sensors, used for measuring the acceleration in the test air duct;

An aerodynamic load sensor, used for measuring the aerodynamic load in the test air duct;

a plurality of strain gauge sensors for measuring fatigue stress in the test air duct;

A plurality of vibration acceleration sensors are used to measure the vibration acceleration of the test air duct, the traction fan and the cooling fan.
A test method for typical working conditions of an air duct system, characterized in that the test method uses the air duct system simulation operation test bench according to any one of claims 1 to 2, and the test method comprises:

By blocking the air inlet of the cooling fan and/or the air outlet of the traction fan, a possible fault condition of the high-speed train during operation is simulated to generate a first simulated condition of air duct blocking;

Powering on the air duct system simulation operation test bench, applying the first simulation working condition to the constructed air duct system simulation operation test bench to carry out air duct structure modal test, air duct internal pneumatic pressure test, structural stress test and system vibration test;

The blocking conditions of the air inlet of the cooling fan and/or the air outlet of the traction fan are changed to obtain a second simulated operating condition, and the second simulated operating condition is applied to the air duct system simulation operation test bench, and sensor data corresponding to the sensors arranged in the air duct system simulation operation test bench are collected to perform simulation tests on simulated operating conditions with different degrees of blocking.
The test method according to claim 3 is characterized in that the cooling fan is The air outlet and/or the air outlet of the traction fan are blocked to simulate the possible fault conditions of the high-speed train during operation, and generate the first simulation condition of air duct blocking, including:

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

or,

The air outlet of the traction fan is blocked by a flip cover of the blocking area adjustment mechanism to obtain the first simulated working condition;

or,

The air inlet of the cooling fan is sealed with adhesive tape to obtain a first simulated sub-operating condition;

The air outlet of the traction fan is blocked by a flip cover of the blocking area adjustment mechanism to obtain a second simulation sub-operating condition;

The first simulation sub-operating condition is combined with the second simulation sub-operating condition to obtain the first simulation operating condition.
The test method according to claim 3, characterized in that the test method further comprises:

When carrying out the duct structure modal test, a plurality of acceleration sensors are arranged at a plurality of different positions on the lower surface of the test duct of the duct system simulation operation test bench, and an LMS modal acquisition and analysis system is used to collect acceleration data and perform modal frequency and vibration type analysis;

When conducting the aerodynamic pressure test inside the air duct, an aerodynamic simulation analysis model of the air duct structure is built through the Starccm+ software to simulate the maximum aerodynamic load and position of the airflow when passing through the air duct structure. According to the simulation analysis results, a pneumatic load sensor is arranged at the maximum aerodynamic load point inside the air duct to test the aerodynamic load inside the air duct;

When carrying out the structural stress test, a structural fatigue load simulation is performed to obtain the fatigue stress distribution characteristics of the simulated operation test bench of the air duct system, and at least one strain gauge sensor is arranged to test the fatigue stress in the test air duct in combination with the fatigue stress distribution characteristics and the location where fatigue damage occurs in the test air duct;

When the system vibration test is carried out, a plurality of vibration acceleration sensors are arranged at the positions of the test air duct, the cooling fan and the traction fan respectively to test the vibration transmission characteristics of the air duct system simulation operation test bench.
The test method according to claim 4 is characterized in that the changing the blocking condition of the air inlet of the cooling fan and/or the air inlet of the traction fan to obtain the second simulated working condition 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 simulated 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 flip cover of the blocking area adjustment mechanism to obtain the second simulated 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 the third simulation sub-operating condition;

For the air outlet of the traction fan, the blocking percentage of the air inlet of the traction fan is adjusted by the flip cover of the blocking area adjustment mechanism to obtain the fourth simulation sub-operating condition;

The third simulation sub-operating condition is combined with the fourth simulation sub-operating condition to obtain the second simulation operating condition.
A test device for typical working conditions of an air duct system, characterized in that the test device comprises:

A simulation condition generation module, used to simulate a possible fault condition of a high-speed train during operation by blocking an air inlet of a cooling fan and/or an air outlet of a traction fan, and generate a first simulation condition of air duct blocking;

The test module is used to power on the air duct system simulation operation test bench, apply the first simulation working condition to the constructed air duct system simulation operation test bench, so as to carry out air duct structure modal test, air duct internal pneumatic pressure test, structural stress test and system vibration test;

A data acquisition module is used to change the blocking condition 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, and collect sensor data corresponding to the sensors arranged in the air duct system simulation operation test bench to simulate tests on simulated operating conditions with different degrees of blocking.
The test device according to claim 7 is characterized in that when the simulation condition generation module is used to simulate a possible fault condition of the high-speed train during operation by blocking the air inlet of the cooling fan and/or the air outlet of the traction fan to generate a first simulation condition of air duct blocking, the simulation condition generation module is also used to:

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

or,

The air outlet of the traction fan is blocked by a flip cover of the blocking area adjustment mechanism to obtain the first simulated working condition;

or,

The air inlet of the cooling fan is sealed with adhesive tape to obtain a first simulated sub-operating condition;

The air outlet of the traction fan is blocked by a flip cover of the blocking area adjustment mechanism to obtain a second simulation sub-operating condition;

The first simulation sub-operating condition is combined with the second simulation sub-operating condition to obtain the first simulation operating condition.
An electronic device, characterized in that it comprises: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate with each other. The processor communicates via the bus, and when the machine-readable instructions are executed by the processor, the steps of the experimental test method for typical working conditions of the air duct system as described in any one of claims 3 to 6 are executed.
A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, the steps of the experimental test method for typical working conditions of an air duct system as described in any one of claims 3 to 6 are executed.