Device for testing comprehensive performance of lattice structure under heat-flow-force coupling working condition

Abstract

A comprehensive performance testing device for a lattice structure under a heat-flow-force coupling working condition belongs to the field of lattice structure performance testing, and comprises a support frame, a heating workbench, a to-be-tested structure, an adjustable slide rail shell, a port sealer, an external pipeline system and a testing system. The heating workbench comprises a storage plate, an insulation rectangular shell, a heating pipe, an upper heating plate, a lower heating plate, a heat insulation plate, a variable alternating current power supply controller and a bottom frame. The port sealer comprises a cover plate, a spiral puller, an upper sealing block, a lower sealing block, a left sealing block, a right sealing block, a rectangular sealing strip, a square sealing ring, a hydraulic device and a sealing protection shell. The external pipeline system comprises an internal thread pipe joint, a connecting pipe, a vortex shedding flowmeter, a differential pressure meter, a hose and a water pump / fan; the testing system comprises a pressure head of the universal testing machine, a temperature sensing sheet, a thermocouple, a signal transmission line and a computer. An inlet end and an outlet end of a to-be-tested structure are sealed, a to-be-tested area is correctly placed, after a heating workbench heats the to-be-tested structure to a preset temperature, a pressure head of a universal testing machine applies pressure downwards, and liquid / air introduced by an external pipeline system cools the to-be-tested structure; then the comprehensive performance of the to-be-tested structure is obtained through data measured by the test system, then engineers are guided to optimize the structural design, the overall performance is improved, and the experimental device is provided for testing the comprehensive performance of the lattice structure under the multi-physics field coupling working condition.

Description

Technical Field

[0001] The present invention belongs to the field of lattice structure performance testing, and particularly relates to a comprehensive performance testing device for lattice structures under thermo-fluid-structure coupling conditions. Background Art

[0002] Due to the unique geometric characteristics of its unit cells, the lattice structure can not only improve the heat exchange efficiency, but also achieve lightweight design while ensuring mechanical properties, and has great application prospects in key components of new energy batteries and aviation equipment. In practical applications, the lattice structure can simultaneously withstand thermal loads (temperature fields) and mechanical loads (stress fields), and there is a significant coupling effect between the two. Through thermo-fluid-structure coupling tests, the structural integrity and reliability of the structure under complex stress environments can be effectively evaluated, providing guarantees for the safe operation of equipment.

[0003] There are two types of limitations in the existing performance tests for lattice structures: one is the quasi-static mechanical test that only applies mechanical loads, and the other is the heat dissipation efficiency test under pure thermal effect conditions. Neither of them truly restores the actual working environment of thermo-fluid-structure multi-physical field coupling. Therefore, it is necessary to design a comprehensive performance testing device for lattice structures under thermo-fluid-structure multi-physical field coupling conditions. Summary of the Invention

[0004] The purpose of the present invention is to provide a comprehensive performance testing device for lattice structures under thermo-fluid-structure coupling conditions. By sealing the inlet and outlet ends of the structure to be tested and correctly placing the area to be tested, after the heating workbench heats the structure to be tested to a predetermined temperature, the indenter of the universal testing machine applies pressure downward while the liquid / air introduced by the external pipeline system is used for cooling, and then the comprehensive performance of the structure to be tested is obtained from the data measured by the testing system, aiming to solve the testing problem of lattice structures under multi-physical fields.

[0005] To achieve the above purpose, the main technical solutions adopted by the present invention include:

[0006] The present invention provides a comprehensive performance testing device for lattice structures under thermo-fluid-structure coupling conditions, including a support frame, a heating workbench, a structure to be tested, an adjustable slide rail housing, a port sealer, an external pipeline system, and a testing system; the heating workbench includes a placement plate, an insulating rectangular shell, heating tubes, an upper heating plate, a lower heating plate, a heat insulation plate, a variable AC power controller, and a bottom frame; the port sealer includes a cover plate, a screw jack, upper, lower, left, and right sealing blocks, a rectangular sealing strip, a square sealing ring, a hydraulic device, and a sealing protection shell; the external pipeline system includes an internal thread pipe joint, a connecting pipe, a vortex flowmeter, a differential pressure gauge, a hose, and a water pump / fan; the testing system includes the indenter of the universal testing machine, a temperature sensing chip, a thermocouple, a signal transmission line, and a computer.

[0007] Furthermore, the support frame is located at the bottom of the entire device. Circular round holes C are provided on the sides of the L-shaped opening grooves on both sides, and slide rails are provided at the bottom of the support frame.

[0008] Furthermore, the bottom frame of the heating workbench is fixedly connected to the central position of the support frame by bolts. The insulating rectangular shell is fixedly connected to the bottom frame by bolts and is separated by a heat insulation plate in the middle to prevent heat load from being transferred to the bottom frame. The upper heating plate and the lower heating plate are embedded in the grooves of the insulating rectangular shell, and the heating tubes are installed in the grooves of the upper heating plate and the lower heating plate. The wiring ends of the heating tubes pass through the circular through holes of the insulating rectangular shell. The variable AC power controller is installed on the support frame and is connected to the wiring ends of the heating tubes. The placement plate is fixedly connected to the insulating rectangular shell by bolts, and the lower surface of the placement plate contacts the upper surface of the upper heating block.

[0009] Furthermore, the structure to be tested is placed on the placement plate of the heating workbench. Only the entrance end of the structure with the skin is inserted into the port seal on the B1 side for sealing and clamping, and the exit end is inserted into the port seal on the B2 side for clamping and sealing. The lattice structure area of the structure to be tested is located at the central position of the placement plate.

[0010] Furthermore, the adjustable slide rail housing is located in the L-shaped opening grooves on both sides of the support frame and is installed on the slide rails of the support frame. The distance between the adjustable slide rail housings on the B1 and B2 sides is adjustable. A round hole D is provided on the side of the adjustable slide rail housing, which is on the same axis as the round holes C provided on both sides of the support frame.

[0011] Furthermore, the port seal is fixedly connected to the adjustable slide rail housing by bolts. The distance between the port seals on the B1 and B2 sides is adjusted by moving the adjustable slide rail housing. The rectangular sealing strip is pasted on the upper, lower, left, and right sealing blocks with glue. The upper sealing block is installed on the slide rail in the sealing protection shell, and the lower sealing block is fixed in the sealing protection shell by countersunk head screws. The hydraulic device is installed on the top of the sealing protection shell by bolts. During sealing, the hydraulic device presses the upper sealing block to make it fit and seal with the upper surface of the structure to be tested, and the lower surface of the pressed structure to be tested fits and seals with the lower sealing block. The left sealing block and the right sealing block are installed in the rectangular shell of the cover plate through slide rails. The screw jacks are installed on the left and right sides of the cover plate by threaded connections. During sealing, the screw jacks on both sides are rotated to tighten the left and right sealing blocks to make them press and seal with the left and right sides of the structure to be tested. The cover plate is fixedly connected to the sealing protection shell by bolts, and a square sealing ring is provided in the middle to assist in sealing.

[0012] Further, one end of the internal-thread pipe joint of the external pipeline system is threadedly connected to the sealing protection shell of the port seal on the B1 side, and the other end is threadedly connected to the connecting pipe; one end of the internal-thread pipe joint is threadedly connected to the sealing protection shell of the port seal on the B2 side, and the other end is threadedly connected to the connecting pipe; the connecting pipe, the vortex flowmeter, the hose, the water pump / fan, the hose, and the differential pressure gauge are sequentially threadedly connected to the connecting pipe.

[0013] Further, the indenter of the universal testing machine of the testing system is located directly above the heating workbench and moves downward to apply pressure to the structure to be tested; the temperature sensing sheet is pasted on the side of the structure to be tested with glue, located in the lattice structure area, near the top of the structure to be tested, and is used to detect the temperature change in the lattice structure area of the structure to be tested; the thermocouple is inserted into the four counterbores on the side of the placement plate of the heating workbench, and all the measured values are transmitted to the computer through the signal transmission line.

[0014] Further, for the comprehensive performance testing device under the thermal-fluid-solid coupling condition of a lattice structure, when the device is placed directly below the indenter of the universal testing machine, the lattice structure area of the structure to be tested is located on the placement plate of the heating workbench. Move the adjustable slide rail housings on the B1 and B2 sides to clamp and seal the inlet end of the structure to be tested inserted therein by the port seal on the B1 side, and clamp and seal the outlet end of the structure to be tested inserted therein by the port seal on the B2 side; after sealing, turn on the heating tube of the heating workbench to heat. After the temperature measured by the thermocouple read from the computer reaches the predetermined temperature, adjust the variable AC power controller to keep the temperature constant; after the temperature measured by the temperature sensing sheet reaches the predetermined value after heating for a period of time, start the water pump / fan to pass liquid / air, and at the same time, the indenter of the universal testing machine applies pressure to the structure to be tested. During the testing process, record the values of the vortex flowmeter, the differential pressure gauge, and the compressive strength value and temperature value read on the computer, and measure the performance of the structure to be tested under the thermal-fluid-solid coupling condition.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The comprehensive performance testing device under the thermal-fluid-solid coupling condition of a lattice structure proposed by the present invention effectively overcomes the performance testing problems of the lattice structure under complex working conditions through thermal-mechanical coupling design, and can complete the mechanical property testing of the lattice structure in three working environments of load-bearing, heat dissipation, and load-bearing-heat dissipation coupling.

[0017] 2. The sealing block in the port seal can achieve the sealing of various rectangular port sizes under the action of the hydraulic device and the screw jack. The rectangular sealing strip made of elastic rubber sealing material can adapt to temperature changes and small mechanical deformations, ensuring the reliability of the seal.

[0018] 3. The heating workbench is heated by heating tubes, and the placement board of the workbench is evenly heated. At the same time, a thermocouple is equipped to monitor the temperature of the placement board in real time, and the temperature of the structure to be tested is controlled through a variable AC power controller.

[0019] 4. The device can be flexibly installed on a universal testing machine, can quickly switch different test modes, improve work efficiency, and is easy to install and has strong compatibility.

[0020] 5. The device can meet both air-cooled heat dissipation and liquid-cooled heat dissipation, meeting diverse requirements. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of a comprehensive performance testing device for a lattice structure under thermo-fluid-solid coupling conditions of the present invention;

[0022] Figure 2 It is a schematic structural diagram of the upper and lower heating plates and heating tubes in the heating workbench of the present invention;

[0023] Figure 3 It is a schematic structural diagram of each region of the structure to be tested of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the support frame and the adjustable slide rail housing of the present invention;

[0025] Figure 5 It is a schematic structural diagram of the heating workbench of the present invention;

[0026] Figure 6 It is an exploded view of the heating workbench of the present invention;

[0027] Figure 7 It is a schematic structural diagram of the port seal of the present invention;

[0028] Figure 8 It is an exploded view of the port seal of the present invention;

[0029] Figure 9 It is a schematic structural diagram of the cover plate in the port seal of the present invention;

[0030] Figure 10 It is a schematic structural diagram of the test system of the present invention;

[0031] Figure 11 It is a schematic structural diagram of the external pipeline of the present invention;

[0032] Description of the Reference Numerals:

[0033] Side B1 and B2, support frame 100, L-shaped opening groove 100-A, slide rail 100-B, structure to be tested 300, inlet end A1, lattice structure area A2, outlet end A3, adjustable slide rail housing 400, heating workbench 200, placement board 201, insulating rectangular shell 202, heating tube 203, upper heating plate 204-1, lower heating plate 204-2, heat insulation plate 205, variable AC power controller 206, bottom frame 207, port seal 500, cover plate 501, slide rail 501-A, rectangular shell 501-B, screw jack 502, upper, lower, left, and right sealing blocks 503-1, 503-2, 503-3, 503-4, rectangular sealing strip 504, square sealing ring 505, hydraulic device 506, sealing protection shell 507, slide rail 507-A, external pipeline system 600, internal thread pipe joints 601-1, 601-2, connecting pipes 602-1, 602-2, vortex flowmeter 603, differential pressure gauge 604, hoses 605-1, 605-2, water pump / fan 606, test system 700, indenter of universal testing machine 701, temperature sensing chip 702, thermocouple 703, signal transmission line 704, computer 705. Detailed implementation

[0034] For better explanation and understanding of the present invention, the following will describe the present invention in detail through specific implementation manners in conjunction with the attached Figures 1 to 11 drawings.

[0035] The present invention provides a comprehensive performance testing device under the coupled thermal-fluid-mechanical conditions of a lattice structure, including a support frame 100, a heating workbench 200, a structure to be tested 300, an adjustable slide rail housing 400, a port seal 500, an external pipeline system 600, and a test system 700; the heating workbench includes a placement board 201, an insulating rectangular shell 202, a heating tube 203, an upper heating plate 204-1, a lower heating plate 204-2, a heat insulation plate 205, a variable AC power controller 206, and a bottom frame 207; the port seal includes a cover plate 501, a screw jack 502, upper, lower, left, and right sealing blocks 503-1, 503-2, 503-3, 503-4, a rectangular sealing strip 504, a square sealing ring 505, a hydraulic device 506, and a sealing protection shell 507; the external pipeline system 600 includes internal thread pipe joints 601-1, 601-2, connecting pipes 602-1, 602-2, a vortex flowmeter 603, a differential pressure gauge 604, hoses 605-1, 605-2, and a water pump / fan 606; the test system includes an indenter 701 of a universal testing machine, a temperature sensing chip 702, a thermocouple 703, a signal transmission line 704, and a computer 705.

[0036] Further, the support frame 100 is located at the bottom of the entire device. Circular round holes C are provided on the sides of the L-shaped opening grooves 100-A on both sides, and a slide rail 100-B is provided at the bottom of the support frame 100.

[0037] Further, the bottom frame 207 of the heating workbench 200 is fixedly connected to the central position of the support frame 100 by bolts. The insulating rectangular shell 202 is connected and fixed to the bottom frame 207 by bolts, and is separated by a heat insulation plate 205 in the middle to prevent heat load from being transmitted to the bottom frame 207; the upper heating plate 204-1 and the lower heating plate 204-2 are embedded in the grooves of the insulating rectangular shell 202, and the heating tubes 203 are installed in the grooves of the upper heating plate 204-1 and the lower heating plate 204-2. The wiring terminals of the heating tubes 203 pass through the circular through holes of the insulating rectangular shell 202; the variable AC power controller 206 is installed on the support frame 200 and is connected to the wiring terminals of the heating tubes 203. The placement plate 201 is connected and fixed to the insulating rectangular shell 202 by bolts. The lower surface of the placement plate 201 is in contact with the upper surface of the upper heating block 204-1, as Figure 2 , Figure 6 shown.

[0038] Further, the structure to be tested 300 is placed on the placement plate 201 of the heating workbench 200. Only the skin inlet end A1 of the structure to be tested 300 is inserted into the port seal 500 on the B1 side for sealing and clamping, and the outlet end A3 is inserted into the port seal 500 on the B2 side for clamping and sealing. The lattice structure area A2 of the structure to be tested 300 is located at the central position of the placement plate 201, as Figure 3 shown.

[0039] Further, the adjustable slide rail housing 400 is located in the L-shaped opening grooves 100-A on both sides of the support frame 100 and is installed on the slide rail 100-B of the support frame 100. The distance between the adjustable slide rail housings 400 on the B1 and B2 sides is adjustable. A round hole D is provided on the side of the adjustable slide rail housing 400, which is on the same axis as the round holes C provided on both sides of the support frame, as Figure 4 shown.

[0040] Further, the port seal 500 is fixedly connected in the adjustable slide rail housing 400 by bolts, and the distance between the port seals 500 on both sides of B1 and B2 is adjusted by moving the adjustable slide rail housing 400; the rectangular sealing strip 504 is pasted on the upper, lower, left, and right sealing blocks 503-1, 503-2, 503-3, 503-4 with glue. The upper sealing block 503-1 is installed on the slide rail 507-A in the sealing protection shell 507. The lower sealing block 503-2 is fixed in the sealing protection shell 507 by countersunk head screws. The hydraulic device 506 is installed on the top of the sealing protection shell 507 by bolt connection. During sealing, the hydraulic device 506 presses the upper sealing block 503-1 to make it fit and seal with the upper surface of the structure to be tested 300, and the lower surface of the pressed structure to be tested 300 fits and seals with the lower sealing block 503-2; the left sealing block 503-3 and the right sealing block 503-4 are installed in the rectangular shell 501-B of the cover plate 501 through the slide rail 501-A. The screw jack 502 is installed on the left and right sides of the cover plate 501 by threaded connection. During sealing, the screw jacks 502 on both sides are rotated to tighten the left and right sealing blocks 503-3, 503-4 to press and seal with the left and right sides of the structure to be tested 300; the cover plate 501 is fixedly connected to the sealing protection shell 507 by bolts, and a square sealing ring 505 is provided in the middle to assist in sealing, as Figure 9 shown.

[0041] Further, one end of the internal thread pipe joint 601-1 of the external pipeline system 600 is threadedly connected to the sealing protection shell 507 of the port seal 500 on the B1 side, and the other end is threadedly connected to the connecting pipe 602-1; one end of the internal thread pipe joint 601-2 is threadedly connected to the sealing protection shell 507 of the port seal 500 on the B2 side, and the other end is threadedly connected to the connecting pipe 602-2; the connecting pipe 602-1, the vortex flowmeter 603, the hose 605-1, the water pump / fan 606, the hose 605-2, and the differential pressure gauge 604 are sequentially threadedly connected to the connecting pipe 602-2.

[0042] Further, the indenter 701 of the universal testing machine of the testing system 700 is located directly above the heating workbench 200, and moves downward to apply pressure to the structure to be tested 300; the temperature sensing chip 702 is pasted on the side of the structure to be tested 300 with glue, located in the lattice structure area A3, near the top of the structure to be tested 300, and is used to detect the temperature change in the lattice structure area A3 of the structure to be tested 300; the thermocouple 703 is inserted into the four counterbored holes on the side of the placement plate 201 of the heating workbench 200, and all the measured values are transmitted to the computer 705 through the signal transmission line 704.

[0043] Further, for the comprehensive performance testing device under the thermal-fluid-mechanical coupling condition of the lattice structure, when the device is placed directly below the indenter 701 of the universal testing machine, the lattice structure area A2 of the structure 300 to be tested is located on the placement plate 201 of the heating workbench 200. Move the adjustable slide rail housings 400 on the B1 and B2 sides, so that the port seal 500 on the B1 side clamps and seals the inlet end A1 of the structure 300 to be inserted therein, and the port seal 500 on the B2 side clamps and seals the outlet end A3 of the structure 300 to be inserted therein. After sealing, turn on the heating tube 203 of the heating workbench 200 to heat. After the temperature measured by the thermocouple 703 read from the computer 705 reaches the predetermined temperature, adjust the variable AC power controller 207 to keep the temperature constant. After heating for a period of time and the temperature measured by the temperature sensing chip 702 reaches the predetermined value, start the water pump / air blower 606 to pass liquid / air, and at the same time, the indenter 701 of the universal testing machine applies pressure to the structure 300 to be tested. During the test process, record the values of the compression strength and temperature read on the vortex flowmeter 603, the differential pressure gauge 604, and the computer 705, and measure the performance of the structure to be tested under the thermal-fluid-mechanical coupling condition.

[0044] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An integrated performance testing device under the coupled thermal-fluid-mechanical conditions of a dot matrix structure, characterized in that It includes a support frame, a heating workbench, a structure to be tested, an adjustable slide rail housing, a port sealer, an external pipeline system, and a testing system; the heating workbench includes a placement board, an insulating rectangular shell, heating tubes, an upper heating plate, a lower heating plate, a heat insulation board, a variable AC power controller, and a bottom frame; the port sealer includes a cover plate, a screw jack, upper, lower, left, and right sealing blocks, a rectangular sealing strip, a square sealing ring, a hydraulic device, and a sealing protection shell; the external pipeline system includes an internal thread pipe joint, a connecting pipe, a vortex flowmeter, a differential pressure gauge, a hose, and a water pump / fan; the testing system includes the indenter of a universal testing machine, a temperature sensing chip, a thermocouple, a signal transmission line, and a computer.

2. The comprehensive performance test device under the thermal-fluid-solid coupling condition of the dot matrix structure according to claim 1, characterized in that, The support frame is located at the bottom of the entire device. Circular holes C are opened on the sides of the L-shaped open grooves on both sides, and slide rails are provided at the bottom of the support frame.

3. The comprehensive performance test device under the thermo-fluid-solid coupling condition of the dot matrix structure according to claim 1, characterized in that, The bottom frame of the heating workbench is fixedly connected to the central position of the support frame by bolts. The insulating rectangular shell is fixedly connected to the bottom frame by bolts, and is separated by a heat insulation board in the middle to prevent heat load from being transmitted to the bottom frame; the upper heating plate and the lower heating plate are embedded in the grooves of the insulating rectangular shell, and the heating tubes are installed in the grooves of the upper heating plate and the lower heating plate. The wiring ends of the heating tubes pass through the circular through holes of the insulating rectangular shell; the variable AC power controller is installed on the support frame and is connected to the wiring ends of the heating tubes. The placement board is fixedly connected to the insulating rectangular shell by bolts, and the lower surface of the placement board contacts the upper surface of the upper heating block.

4. The comprehensive performance testing device under the thermal-fluid-solid coupling condition of the dot matrix structure according to claim 1, characterized in that The structure to be tested is placed on the placement board of the heating workbench. Only the inlet end of the skin of the structure to be tested is inserted into the port sealer on the B1 side for sealing and clamping, and the outlet end is inserted into the port sealer on the B2 side for clamping and sealing. The lattice structure area of the structure to be tested is located at the central position of the placement board.

5. The comprehensive performance testing device under the coupled thermal-fluid-mechanical conditions of a dot matrix structure according to claim 1, characterized in that, The adjustable slide rail housing is located in the L-shaped open grooves on both sides of the support frame, is installed on the slide rails of the support frame, and the distance between the adjustable slide rail housings on the B1 and B2 sides is adjustable. A circular hole D is opened on the side of the adjustable slide rail housing, which is on the same axis as the circular holes C opened on both sides of the support frame.

6. The comprehensive performance testing device under the thermal-fluid-solid coupling condition of the dot matrix structure according to claim 1, characterized in that, The port sealer is fixedly connected to the adjustable slide rail housing by bolts. The distance between the port sealers on the B1 and B2 sides is adjusted by moving the adjustable slide rail housing; the rectangular sealing strip is pasted on the upper, lower, left, and right sealing blocks with glue. The upper sealing block is installed on the slide rail in the sealing protection shell, the lower sealing block is fixed in the sealing protection shell by countersunk head screws, the hydraulic device is installed on the top of the sealing protection shell by bolt connection. During sealing, the hydraulic device presses the upper sealing block to make it fit and seal with the upper surface of the structure to be tested, and the lower surface of the pressed structure to be tested fits and seals with the lower sealing block; the left and right sealing blocks are installed in the rectangular shell of the cover plate through slide rails, and the screw jacks are installed on the left and right sides of the cover plate by threaded connection. During sealing, the screw jacks on both sides are rotated to tighten the left and right sealing blocks to press and seal with the left and right sides of the structure to be tested; the cover plate is fixedly connected to the sealing protection shell by bolts, and a square sealing ring is provided in the middle for auxiliary sealing.

7. A comprehensive performance testing device under the thermo-fluid-solid coupling condition of a dot matrix structure according to claim 1, characterized in that, One end of the internal-thread pipe joint of the external pipeline system is threadedly connected to the sealing protection shell of the port seal on the B1 side, and the other end is threadedly connected to the connecting pipe. One end of the internal-thread pipe joint is threadedly connected to the sealing protection shell of the port seal on the B2 side, and the other end is threadedly connected to the connecting pipe. The connecting pipe, vortex flowmeter, hose, water pump / fan, hose, and differential pressure gauge are sequentially threadedly connected to the connecting pipe.

8. The comprehensive performance test device under the coupled thermal-fluid-mechanical conditions of the dot matrix structure according to claim 1, characterized in that The indenter of the universal testing machine of the test system is located directly above the heating workbench and moves downward to apply pressure to the structure under test. The temperature sensing chip is pasted on the side of the structure under test with glue, located in the lattice structure area, near the top of the structure under test, and is used to detect the temperature change in the lattice structure area of the structure under test. The thermocouples are inserted into the four counterbores on the side of the placement plate of the heating workbench, and all measured values are transmitted to the computer through signal transmission lines.

9. The comprehensive performance testing device under the thermal-fluid-solid coupling condition of the dot matrix structure according to claim 1, characterized in that, For the comprehensive performance test device under the thermal-fluid-mechanical coupling condition of the lattice structure, when the device is placed directly below the indenter of the universal testing machine, the lattice structure area of the structure under test is located on the placement plate of the heating workbench. Move the adjustable slide rail housings on the B1 and B2 sides to clamp and seal the port seal on the B1 side into the inlet end of the structure under test inserted therein, and clamp and seal the port seal on the B2 side into the outlet end of the structure under test inserted therein. After sealing, turn on the heating pipe of the heating workbench to heat. After the temperature measured by the thermocouple read from the computer reaches the predetermined temperature, adjust the variable AC power controller to keep the temperature constant. After heating for a period of time and the temperature measured by the temperature sensing chip reaches the predetermined value, start the water pump / fan to pass liquid / air, and at the same time, the indenter of the universal testing machine applies pressure to the structure under test. During the test process, record the values of the compression strength and temperature read on the vortex flowmeter, differential pressure gauge, and computer, and measure the performance of the structure under test under the thermal-fluid-mechanical coupling condition.

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