A test structure and method for the static and dynamic performance of a heavy-load elastic body

Abstract

This application discloses a test structure and method for the static and dynamic performance of heavy-duty elastomers. The test structure for the static and dynamic performance of heavy-duty elastomers provided in this application includes a fixed load structure, a suspension module, and a control module. The purpose of this invention is to provide a test structure for the static and dynamic performance of heavy-duty elastomers to meet practical engineering needs. It addresses the shortcomings of existing single test structures that cannot comprehensively test the static and dynamic performance of heavy-duty elastomers. The invention integrates the electro-hydraulic actuator and the electro-measuring actuator used in static and dynamic stiffness testing, providing two loading forces through a single structure. Simultaneously, the suspension module suspends the fixed load structure, which has undergone complex mechanical design, significantly reducing vibration interference from the foundation, thereby improving the accuracy of testing the static and dynamic performance parameters of heavy-duty elastomers.

Description

Technical Field

[0001] This application relates to the field of heavy-load elastomer testing technology, and in particular to a static and dynamic performance testing structure for heavy-load elastomers. Background Technology

[0002] Heavy-duty elastomers, as a classic vibration damping component, are widely used in military and civilian fields such as high-speed rail, construction, nuclear power, shipbuilding, and aerospace. They can effectively reduce the vibration transmission between the vibration source equipment and the installation foundation, thereby protecting the equipment or reducing its impact on the surrounding environment.

[0003] The static and dynamic performance of heavy-duty elastomers is a core technical indicator affecting their vibration isolation effect, mainly including parameters such as static stiffness, dynamic stiffness, damping ratio, and impedance characteristics. In specific engineering applications, the ideal way to obtain these parameters is through experimental testing using a heavy-duty elastomer static and dynamic characteristic test structure. Currently, existing single test structures only have the capability to test the static and dynamic performance of elastomers under small to medium loads, making it difficult to test the static and dynamic performance parameters of heavy-duty elastomers. The main reasons include: 1) Existing test structures have limited functionality, while heavy-duty elastomers have numerous static and dynamic parameters, making the design of a single test structure difficult; 2) Heavy-duty elastomers require large loading forces, sometimes exceeding 100 tons, making conventional dynamic force loading methods insufficient for medium- and high-frequency testing requirements; 3) Designing low coupling with the external environment is difficult, making it impossible to isolate external interference during the dynamic performance testing of heavy-duty elastomers.

[0004] The aforementioned problems significantly impact the testing of static and dynamic performance parameters of heavy-duty elastomers. Applying heavy-duty elastomers to related fields without obtaining accurate parameters may pose significant technical risks. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0006] Therefore, a first aspect of the present invention provides a test structure for the static and dynamic performance of a heavy-duty elastomer.

[0007] A second aspect of the present invention provides a method for testing the static and dynamic performance of a heavy-duty elastomer.

[0008] In view of this, a test structure for the static and dynamic performance of a heavy-load elastomer is proposed according to a first aspect of the embodiments of this application, comprising:

[0009] A fixed load structure is used to fix a heavy-load elastic body and apply a load to the heavy-load elastic body.

[0010] The fixed load structure includes an electro-hydraulic actuator and an electromagnetic actuator;

[0011] Specifically, when the fixed load structure applies a load to the elastic body through an electro-hydraulic actuator, the fixed load structure is in a first state; when the fixed load structure applies a load to the elastic body under test through an electromagnetic actuator, the fixed load structure is in a second state.

[0012] A suspension module, wherein the suspension module is disposed on the ground or on an installation platform, and the fixed load structure is disposed at the upper end of the suspension module;

[0013] A control module is electrically connected to the fixed load structure and the suspension module. The control module is used to drive the fixed load structure and the suspension module and transmit electrical signals.

[0014] In one feasible implementation, the fixed load structure in the first state includes:

[0015] Mounting base, which is located at the upper end of the suspension module, and the heavy-load elastomer under test is placed on the mounting base during the test;

[0016] A guide column, the lower end of which is disposed on the mounting base;

[0017] A loading beam is provided, which is vertically and retractably connected to the guide column, and the electro-hydraulic actuator is provided on the loading beam.

[0018] A piston rod is connected to the electro-hydraulic actuator, and the piston rod applies a load to the elastic body under test through the electro-hydraulic actuator;

[0019] A first force sensor is disposed on the upper side of the mounting base;

[0020] A displacement sensor, which is integrated into the piston rod;

[0021] A second force sensor is disposed at the lower end of the piston rod;

[0022] The first acceleration sensor is fixedly connected to the mounting base.

[0023] In one feasible implementation, the fixed load structure in the second state includes:

[0024] The second connecting seat, there are four second connecting seats, one end of the second connecting seat is connected to the loading beam, the second connecting seats are respectively disposed at the four corners of the loading beam, and the second connecting seats are detachably connected to the loading beam;

[0025] The third force sensor, there are four of them, which are respectively disposed at the lower end of the four second connecting seats;

[0026] The first air spring, the number of the first air spring is eight, of which four first air springs are disposed at one end of the third force sensor of the second connecting seat, and the other four first air springs are connected at one end of the mounting base, and the first air springs are detachably connected to the mounting base;

[0027] Two mass blocks are used, one of which is connected at one end to the other end of the first air spring of the third force sensor, and the other is connected at one end to the other end of the first air spring of the mounting base. During the test, the elastic body to be tested is placed between the two mass blocks.

[0028] The second acceleration sensor, the number of which is at least two, and the two second acceleration sensors are respectively disposed on two mass blocks;

[0029] The electromagnetic actuator is detachably connected to the second force sensor and the displacement sensor.

[0030] In one feasible implementation, the levitation module includes:

[0031] An inertial platform, the upper surface of which is connected to the fixed load structure;

[0032] A second air spring, the upper end of which is connected to the inertial platform, and the lower end of which is connected to the ground or the mounting platform;

[0033] An air supply system, which is connected to the second air spring and the fixed load structure.

[0034] In one feasible implementation, the control module includes:

[0035] A power oil source, wherein the power oil source is connected to the electro-hydraulic actuator;

[0036] A control cabinet, which is electrically connected to the fixed load structure and the suspension module;

[0037] A power amplifier, which is electrically connected to the electromagnetic actuator;

[0038] The host computer is electrically connected to the fixed load structure, the suspension module, the power oil source, the control cabinet, and the power amplifier.

[0039] In one feasible implementation, the mass block includes:

[0040] The outer casing has connecting horizontal plates on its upper and lower surfaces, and a connecting vertical plate is provided between the two connecting horizontal plates of the outer casing;

[0041] Weight plates, the number of which is several, are stacked inside the outer shell.

[0042] A positioning groove is formed on the lower surface of the outer shell and the upper surface of the weight plate;

[0043] A positioning protrusion is formed on the lower surface of the weight plate, and the positioning groove matches the positioning protrusion.

[0044] A locking assembly, located inside the housing, is used to lock the weight plate.

[0045] In one feasible implementation, the locking assembly includes:

[0046] Two threaded rods are respectively fixedly disposed longitudinally on both sides inside the outer casing;

[0047] Two rotating blocks are threadedly connected to the threaded rod.

[0048] The fixing blocks are two in number, and the two fixing blocks are respectively sleeved and connected to the threaded rod, and are rotatably connected to the rotating block;

[0049] The positioning plate is fixedly connected to the fixing block on both sides.

[0050] In one feasible implementation, the fixed load structure further includes:

[0051] The electro-hydraulic actuator is connected to the loading beam via a displacement assembly.

[0052] In one feasible implementation, the displacement component includes:

[0053] A lead screw, one end of which is connected to the loading crossbeam;

[0054] A rotary drive motor is provided, the output end of which is connected to one end of the lead screw, and the lead screw is connected to the loading beam via the rotary drive motor.

[0055] A fixing block is threadedly connected to the lead screw, and the electro-hydraulic actuator is connected to the fixing block.

[0056] According to a second aspect of the embodiments of this application, a method for testing the static and dynamic performance of a heavy-loaded elastomer is provided, applied to the static and dynamic performance testing structure of the heavy-loaded elastomer described in any one of the above-mentioned embodiments, comprising:

[0057] When testing static stiffness and damping ratio, the fixed load structure is in the first state, and a single load is applied to the tested heavy-load elastic body through an electro-hydraulic actuator.

[0058] When testing the first dynamic stiffness and damping ratio, the fixed load structure is in the first state, and a load with a frequency of 2 to 100 Hz is applied to the tested heavy-load elastic body through an electro-hydraulic actuator.

[0059] When testing the second dynamic stiffness, the suspension module is working, the fixed load structure is in the second state, and the electromagnetic actuator applies a load with a frequency of 101 to 2000 Hz to the tested heavy-load elastic body.

[0060] During impedance characteristic testing, the suspension module is in operation, the fixed load structure is in the second state, and a load with a frequency of 101 to 2000 Hz is applied to the tested heavy-load elastic body through an electromagnetic actuator.

[0061] Compared with the prior art, the present invention has at least the following beneficial effects: The present invention integrates the static preloading structure and dynamic load loading structure of heavy-duty elastomers for the first time. Through the cooperation of different components, it achieves the static and dynamic performance testing of various heavy-duty elastomers for the first time through a single test structure, solving the problems of single test function and insufficient heavy-duty test capability of existing heavy-duty elastomer test structures.

[0062] Meanwhile, the present invention employs a suspension module, on which the fixed load structure is set, allowing the fixed load structure to suspend above the ground. This significantly reduces the impact of external vibrations on the test structure while ensuring the reliability of the test structure, thereby improving test accuracy. Attached Figure Description

[0063] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0064] Figure 1 A structural block diagram of a heavy-load elastomer static and dynamic performance testing structure according to an embodiment of this application;

[0065] Figure 2 An isometric view of a heavy-load elastomer static and dynamic performance test structure according to an embodiment of this application;

[0066] Figure 3An isometric view of a fixed-load structure according to an embodiment of this application.

[0067] in, Figure 1 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0068] 100. Fixed load structure; 200. Suspension module; 300. Control module;

[0069] 110. Electro-hydraulic actuator; 120. Electromagnetic actuator; 130. Mounting base; 140. Guide column; 150. Loading beam; 160. Piston rod; 170. First force sensor; 180. Displacement sensor; 190. First force acceleration sensor; 111. Second connecting seat; 112. Third force sensor; 113. First air spring; 114. Mass block; 115. Second acceleration sensor;

[0070] 210. Inertial platform; 220. Second air spring; 230. Air supply system.

[0071] 310 Power oil source; 320 Control cabinet; 330 Power amplifier; 340 Host computer. Detailed Implementation

[0072] To better understand the above technical solutions, the technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0073] like Figure 1-3 As shown, a first aspect of the embodiments of this application proposes a static and dynamic performance testing structure for a heavy-duty elastomer, comprising: a fixed load structure 100, the fixed load structure 100 being used to fix the heavy-duty elastomer and apply a load to the heavy-duty elastomer; wherein, the fixed load structure 100 includes an electro-hydraulic actuator 110 and an electromagnetic actuator 120; wherein, when the fixed load structure 100 applies a load to the elastomer through the electro-hydraulic actuator 110, the fixed load structure 100 is in a first state, and the fixed load structure 100... When a load is applied to the elastic body under test by the electromagnetic actuator 120, the fixed load structure 100 is in the second state; the suspension module 200 is set on the ground or an installation platform, and the fixed load structure 100 is set on the upper end of the suspension module 200; the control module 300 is electrically connected to the fixed load structure 100 and the suspension module 200, and the control module 300 is used to drive the fixed load structure 100 and the suspension module 200 and transmit electrical signals.

[0074] The static and dynamic performance testing structure for heavy-load elastomers provided in this application includes a fixed load structure 100, a suspension module 200, and a control module 300.

[0075] The fixed load structure 100 is used to fix the heavy-duty elastic body and apply loads to it. The fixed load structure 100 includes an electro-hydraulic actuator 110 and an electromagnetic actuator 120. When static stiffness and low-frequency dynamic stiffness below 100 Hz need to be tested on the heavy-duty elastic body, the electro-hydraulic actuator 110 applies the load. The electro-hydraulic actuator 110 applies the load at a lower frequency, resulting in a larger achievable load limit. When high-frequency dynamic stiffness above 100 Hz needs to be applied to the heavy-duty elastic body, the electromagnetic actuator 120 applies the load. The electromagnetic actuator 120 applies the load at a lower limit, but at a higher frequency.

[0076] The fixed load structure 100 has a first state and a second state. When the static stiffness and low-frequency dynamic stiffness of the heavy-load elastic body are tested by the electro-hydraulic actuator 110, the fixed load structure 100 is in the first state. When the high-frequency dynamic stiffness of the heavy-load elastic body is tested by the electromagnetic actuator 120, the fixed load structure 100 can be adjusted to the second state.

[0077] The suspension module 200 is located on the lower side of the fixed load structure 100. The suspension module 200 is set on the installation platform or the ground. The suspension module 200 can separate and buffer the fixed load structure 100 from the ground. On the one hand, it can avoid vibrations around the test structure from affecting the test results, thereby ensuring the stability of the test structure. On the other hand, it can avoid the vibrations caused by the heavy-load elastomer during the test from affecting the surrounding environment, and increase the flexibility of the test structure installation.

[0078] The control module 300 is used to uniformly regulate the fixed load structure 100 and the suspension module 200.

[0079] The purpose of this invention is to provide a test structure for the static and dynamic performance of heavy-duty elastomers to meet practical engineering needs. This structure addresses the shortcomings of existing single test structures, which are unable to comprehensively test the static and dynamic performance of heavy-duty elastomers. It integrates the electro-hydraulic actuator 110 and the electrical actuator for static and dynamic stiffness testing, providing two loading forces through a single structure. At the same time, the suspension module 200 suspends the fixed load structure 100, which has undergone complex mechanical design, significantly reducing vibration interference from the foundation and thus improving the accuracy of testing the static and dynamic performance parameters of heavy-duty elastomers.

[0080] like Figure 1-3As shown, when the fixed load structure 100 is in the first state, it further includes: a mounting base 130, which is disposed at the upper end of the suspension module 200, and the heavy-load elastic body under test is disposed on the mounting base 130 during the test; a guide column 140, the lower end of which is disposed on the mounting base 130; a loading beam 150, which is vertically and flexibly connected to the guide column 140, and the electro-hydraulic actuator 110 is disposed on the loading beam 150; and a piston rod 160, which is the piston rod of the fixed load structure 100. A piston rod 160 is connected to the electro-hydraulic actuator 110, and the piston rod 160 applies a load to the elastic body under test through the electro-hydraulic actuator 110; a first force sensor 170 is disposed on the upper side of the mounting base 130; a displacement sensor 180 is integrated into the piston rod 160; a second force sensor is disposed at the lower end of the piston rod 160; and a first acceleration sensor is fixedly connected to the mounting base 130.

[0081] In this technical solution, when the fixed load structure 100 is in the first state, the fixed load structure 100 also includes a mounting base 130, a guide column 140, a loading beam 150, a piston rod 160, a first force sensor 170, a displacement sensor 180, a second force sensor, and a first acceleration sensor.

[0082] The mounting base 130 provides an installation foundation for the fixed load structure 100. In this embodiment, there are four guide columns 140, with their lower ends attached to the mounting base 130. The loading beam 150 is vertically connected to the guide columns 140, allowing it to move up and down. This facilitates height adjustment during testing of the heavy-duty elastomer. An electro-hydraulic actuator 110 is mounted on the loading beam 150, and a piston rod 160 is connected to it. During testing, the piston rod 160 is connected to the electro-hydraulic actuator 110. The hydraulic actuator 110 and piston rod 160 apply load to the heavy-duty elastomer. The first force sensor 170 is located on the upper side of the mounting base 130. The first force sensor 170 monitors the torque on the force-bearing side of the heavy-duty elastomer during the test. The displacement sensor 180 and the second force sensor are located at the lower end of the piston rod 160. They are used to monitor the force and deformation on the force-bearing side of the heavy-duty elastomer during the test. The first acceleration sensor is located on the mounting base 130. It can determine the static stiffness, dynamic stiffness (low frequency), and damping ratio parameters of the heavy-duty elastomer based on the obtained vibration acceleration signal.

[0083] When conducting static stiffness and low-frequency dynamic stiffness tests below 100 Hz, the heavy-duty elastomer is tested using the fixed load structure 100 in this state. In actual use, the heavy-duty elastomer is placed on the installation platform, and the height of the loading beam 150 is adjusted by the guide column 140. Then, the piston rod 160 is controlled by the electro-hydraulic actuator 110 to apply a load to the heavy-duty elastomer. The parameters of the heavy-duty elastomer are monitored by the first force sensor 170, the displacement sensor 180, the second force sensor, and the first acceleration sensor, thereby completing the test of the heavy-duty elastomer.

[0084] like Figure 1-3 As shown, when the fixed load structure 100 is in the second state, it further includes: four second connecting seats 111, one end of which is connected to the loading beam 150, and the second connecting seats 111 are respectively disposed at the four corners of the loading beam 150, and the second connecting seats 111 are detachably connected to the loading beam 150; four third force sensors 112, which are respectively disposed at the lower ends of the four second connecting seats 111; and eight first air springs 113, of which four first air springs 113 are connected at one end to the third force sensors 112 disposed at the second connecting seats 111, and the other four first air springs 113 are connected to... The first air spring 113 is detachably connected to the mounting base 130; there are two mass blocks 114, one of which is connected at one end to the other end of the first air spring 113 of the third force sensor 112, and the other is connected at one end to the other end of the first air spring 113 of the mounting base 130. During the test, the elastic body under test is placed between the two mass blocks 114; there are at least two second acceleration sensors 115, which are respectively disposed on the two mass blocks 114; and the electromagnetic actuator 120 is detachably connected to the second force sensor and the displacement sensor 180.

[0085] In this technical solution, when the fixed load structure 100 is in the second state, it also includes a second connecting seat 111, a third force sensor 112, a first air spring 113, and a mass block 114.

[0086] The number of first air springs 113 is eight.

[0087] There are four second connecting seats 111, which are respectively set at the four corners of the lower side of the loading beam 150. The connection between the second connecting seats 111 and the loading beam 150 is detachable. Four air springs are respectively set at the lower end of the second connecting seats 111, and a mass block 114 is set at the lower end of the four air springs. A third force sensor 112 is set between the second connecting seats 111 and the first air springs 113.

[0088] Among them, one end of the other four first air springs 113 is detachably mounted on the mounting base 130, and another mass block 114 is mounted on the upper end of the four first air springs 113.

[0089] The electromagnetic actuator 120 is detachably mounted below the second force sensor and displacement sensor 180.

[0090] In practical use, the fixed load structure 100 is first adjusted to the second state, and the loading beam 150 is adjusted to the required height via the guide column 140. The heavy-duty elastic body is placed between the two mass blocks 114. Because the load that the electromagnetic actuator 120 can apply is limited, this technical solution adds a mass block 114, a first air spring 113, and a third force sensor 112. By pressurizing the first air spring 113, the heavy-duty elastic body can be loaded through the mass block. The third force sensor 112 is used to monitor the load on the heavy-duty elastic body. The first air spring 113 is adjusted according to the reading of the third force sensor 112 until the load on the heavy-duty elastic body reaches the required value. Then, a high-frequency (above 100 Hz) dynamic load is applied to the heavy-duty elastic body through the electromagnetic actuator 120 to test the high-frequency dynamic stiffness and impedance characteristics of the electromagnetic actuator.

[0091] This technical solution satisfies the frequency requirements of dynamic load for high-frequency dynamic stiffness testing through the electromagnetic actuator 120, and realizes the load requirements for heavy-load elastic body stiffness testing through the air spring and third force sensor 112 structure. Moreover, this structure is organically combined with the structure for testing static stiffness and low-frequency dynamic stiffness, so that this test structure can meet the requirements of heavy-load elastic body stiffness testing and impedance testing under both static and dynamic conditions through simple transformation.

[0092] like Figure 1-3 As shown, the suspension module 200 includes: an inertial platform 210, the upper surface of which is connected to the fixed load structure 100; a second air spring 220, the upper end of which is connected to the inertial platform 210, and the lower end of which is connected to the ground or a mounting platform; and an air supply system 230, which is connected to the second air spring 220 and the fixed load structure 100.

[0093] In this technical solution, the suspension module 200 includes an inertial platform 210, a second air spring 220, and an air supply system 230.

[0094] The upper end of the inertial platform 210 is connected to the fixed load structure 100, one end of the second air spring 220 is connected to the inertial platform 210, and the other end is connected to the ground or the installation platform. The air supply system 230 is connected to the second air spring 220.

[0095] During use, the air supply system 230 supplies air to the second air spring 220, and the second air spring 220 lifts the inertial platform 210 off the ground. When the ground, installation platform or test structure vibrates, the second air spring 220 can buffer and reduce vibration.

[0096] It is understood that in this embodiment, the connection between the air supply system 230 and the fixed load structure 100 is the connection with the first air spring 113.

[0097] In this technical solution, the suspension module 200 uses the second air spring 220 to achieve buffering and shock absorption. On the one hand, it avoids the impact of environmental vibrations on the test results of the test structure, and on the other hand, it avoids the impact of vibrations caused by the test structure on the surrounding environment. At the same time, the second air spring 220 achieves this function and has the same structure as the first air spring 113 of the fixed load structure 100, which facilitates production and installation. Furthermore, the first air spring 113 and the second air spring 220 share a common air supply system 230, which increases the simplification of this test structure.

[0098] like Figure 1-3 As shown, the control module 300 includes: a power oil source 310, which is connected to the electro-hydraulic actuator 110; a control cabinet 320, which is electrically connected to the fixed load structure 100 and the suspension module 200; a power amplifier 330, which is electrically connected to the electromagnetic actuator 120; and a host computer 340, which is electrically connected to the fixed load structure 100, the suspension module 200, the power oil source 310, the control cabinet 320, and the power amplifier 330.

[0099] In this technical solution, the control module 300 includes a power oil source 310, a control cabinet 320, a power amplifier 330, and a host computer 340.

[0100] The power oil source 310 is connected to the electro-hydraulic actuator 110, and the power oil source 310 applies load to the electro-hydraulic actuator 110.

[0101] The power amplifier 330 is connected to the electromagnetic actuator 120 and the host computer 340. The power amplifier 330 is used to amplify the electrical signal sent by the host computer 340 and transmit it to the electromagnetic actuator 120. The electromagnetic actuator 120 applies a load to the heavy-duty elastic body through the power amplifier 330.

[0102] The control cabinet 320 is electrically connected to each sensor and actuator, and the power supply and power cut-off of the sensors and actuators are realized through the control cabinet 320.

[0103] The host computer 340 is electrically connected to the power oil source 310, control cabinet 320, power amplifier 330 and air supply system 230. The host computer 340 realizes integrated control of the test structure, and realizes data acquisition, data calculation and analysis of various sensors of the test structure, which improves the usability of the test structure and reduces the workload of operators.

[0104] like Figure 1-3 As shown, the mass block 114 includes: a shell, with connecting horizontal plates on its upper and lower surfaces, and a connecting vertical plate between the two connecting horizontal plates; several weight plates stacked inside the shell; a positioning groove on the lower surface of the shell and the upper surface of the weight plates; a positioning protrusion on the lower surface of the weight plates, which engages with the positioning groove; and a locking assembly positioned inside the shell for locking the weight plates.

[0105] In this technical solution, the mass block 114 includes a shell, a weight plate, a positioning groove, a positioning protrusion, and a locking assembly.

[0106] The weight plates are several in number and are stacked inside the outer shell.

[0107] The positioning groove is located on the lower surface of the outer shell and the upper surface of the weight plate. The positioning protrusion is located on the lower surface of the weight plate. The positioning groove and the positioning protrusion correspond to each other and are used to limit the weight plate, reducing the possibility of misalignment between adjacent weight plates during the test. The locking component is used to fix the weight plate and prevent misalignment or shaking of the weight plate during the test.

[0108] During use, several weight plates are stacked inside the outer casing. The number of weight plates can be increased or decreased according to the test requirements for the mass block 114. The weight of the mass block 114 is adjusted by adjusting the number of weight plates. When stacking the weight plates, the positioning groove and the positioning protrusion must be engaged. After the weight plates are stacked, there will be gaps on the upper part of the weight plates, which may cause shaking during the test. Therefore, a locking component is added to limit the weight plates and prevent them from shaking.

[0109] like Figure 1-3 As shown, the locking assembly includes: two threaded rods, each longitudinally fixed to one side of the inside of the housing; two rotating blocks, each threadedly connected to one of the threaded rods; two fixed blocks, each sleeved and rotatably connected to one of the threaded rods; and a positioning plate, each fixedly connected to one of the fixed blocks on both sides.

[0110] In this technical solution, the locking assembly includes a threaded rod, a fixed block, a rotating block, and a positioning plate. There are two threaded rods, which are located on both sides inside the housing. The rotating block is threadedly connected to the threaded rod, and the fixed block is sleeved and rotatably connected to the threaded rod. Meanwhile, the two fixed blocks are fixedly connected to the positioning plate.

[0111] After adjusting the positioning plates to the required number, rotate the rotating block. Since the rotating block is threadedly connected to the threaded rod, rotating the rotating block can raise and lower the rotating block on the threaded rod. The fixed block is rotatably connected to the rotating block, so the fixed block can rise and fall with the rotating block. Since the fixed block itself does not need to rotate, it can drive the positioning plate to rise and fall. This structure realizes that by rotating the rotating block, the positioning plate can be driven to rise and fall.

[0112] In actual use, the rotating block is first rotated to raise the positioning plate, providing operating space for adding or removing the weight plate. After the weight plate is adjusted, the rotating block is rotated to lower the positioning plate, so that the positioning plate is tightly attached to the uppermost weight plate, thereby locking the weight plate.

[0113] This technical solution is easy to operate and flexible in effect. It only requires adjusting the rotating block to lock any number of weight plates, reducing the workload of operators while improving the flexibility of the technical solution.

[0114] like Figure 1-3 As shown, the fixed load structure 100 further includes a displacement assembly, and the electro-hydraulic actuator 110 is connected to the loading beam 150 through the displacement assembly.

[0115] In this technical solution, the fixed load structure 100 also includes a displacement component. The electro-hydraulic actuator 110 is connected to the loading beam 150 through the displacement component. The displacement component can drive the electro-hydraulic actuator 110 to move in the horizontal direction. Through the displacement component, the electro-hydraulic actuator 110 can apply load to the tested heavy-duty elastic body at any position on the horizontal plane, further improving the flexibility of this test structure and the diversity and accuracy of the test results.

[0116] It is understandable that, since the electromagnetic actuator 120 is connected to the electro-hydraulic actuator 110, the electromagnetic actuator 120 moves together with the electro-hydraulic actuator 110, and the electromagnetic actuator 120 can also apply a load to the heavy-duty elastic body at any position on the horizontal plane.

[0117] like Figure 1-3 As shown, the displacement assembly includes: a lead screw, one end of which is connected to the loading beam 150; a rotation drive motor, the output end of which is connected to one end of the lead screw, and the lead screw is connected to the loading beam 150 via the rotation drive motor; a fixing block, which is threadedly connected to the lead screw, and the electro-hydraulic actuator 110 is connected to the fixing block.

[0118] In this technical solution, the displacement component includes a lead screw, a rotary drive motor, and a fixed block.

[0119] The fixing block is used to connect the electro-hydraulic actuator 110 and the lead screw. The fixing block is threaded to the lead screw. The rotation drive motor is set on the loading beam 150, and the output end of the rotation drive motor is connected to one end of the lead screw.

[0120] The rotary drive motor can drive the lead screw to move axially. At the same time, the drive end of the rotary drive motor can rotate as a whole, thereby causing the lead screw to rotate around the drive end as the center of rotation.

[0121] This structure can achieve the same technical effect as a cross screw by using only a single lead screw and a single drive motor, allowing the fixed block to appear at any position on the horizontal plane within the range.

[0122] like Figure 1-3 As shown, a second aspect of this application provides a method for testing the static and dynamic performance of a heavy-load elastomer, applied to the static and dynamic performance testing structure of the heavy-load elastomer described in any of the above claims, comprising:

[0123] When testing static stiffness and damping ratio, the fixed load structure 100 is in the first state, and a single load is applied to the tested heavy-duty elastic body through the electro-hydraulic actuator 110; when testing the first dynamic stiffness and damping ratio, the fixed load structure 100 is in the first state, and a load with a frequency of 2 to 100 Hz is applied to the tested heavy-duty elastic body through the electro-hydraulic actuator 110; when testing the second dynamic stiffness, the suspension module 200 is activated, the fixed load structure 100 is in the second state, and a load with a frequency of 101 to 2000 Hz is applied to the tested heavy-duty elastic body through the electromagnetic actuator 120; when testing impedance characteristics, the suspension module 200 is activated, the fixed load structure 100 is in the second state, and a load with a frequency of 101 to 2000 Hz is applied to the tested heavy-duty elastic body through the electromagnetic actuator 120.

[0124] In this invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0125] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0126] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0127] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A test structure for the static and dynamic performance of a heavy-load elastic body, characterized in that, include: A fixed load structure is used to fix the elastic body under test and apply a load to the elastic body under test. The fixed load structure includes an electro-hydraulic actuator and an electromagnetic actuator; Specifically, when the fixed load structure applies a load to the elastic body under test through an electro-hydraulic actuator, the fixed load structure is in a first state; when the fixed load structure applies a load to the elastic body under test through an electromagnetic actuator, the fixed load structure is in a second state. A suspension module, wherein the suspension module is disposed on the ground or on an installation platform, and the fixed load structure is disposed at the upper end of the suspension module; A control module is electrically connected to the fixed load structure and the suspension module. The control module is used to drive the fixed load structure and the suspension module and transmit electrical signals. When the fixed load structure is in the first state, it also includes: Mounting base, which is located at the upper end of the suspension module, and the elastomer under test is placed on the mounting base during the test; A guide column, the lower end of which is disposed on the mounting base; A loading beam is provided, which is vertically and retractably connected to the guide column, and the electro-hydraulic actuator is provided on the loading beam. A piston rod is connected to the electro-hydraulic actuator, and the piston rod applies a load to the elastic body under test through the electro-hydraulic actuator; A first force sensor is disposed on the upper side of the mounting base; A displacement sensor, which is integrated into the piston rod; A second force sensor is disposed at the lower end of the piston rod; A first acceleration sensor is fixedly connected to the mounting base; When the fixed load structure is in the second state, it also includes: The second connecting seat, there are four second connecting seats, one end of the second connecting seat is connected to the loading beam, the second connecting seats are respectively disposed at the four corners of the loading beam, and the second connecting seats are detachably connected to the loading beam; The third force sensor, there are four of them, which are respectively disposed at the lower end of the four second connecting seats; The first air spring, there are eight first air springs, of which one end of four first air springs is connected to the third force sensor provided on the second connecting base, and one end of the other four first air springs is connected to the mounting base. The first air springs are detachably connected to the mounting base. Two mass blocks are used, one of which is connected at one end to the other end of the first air spring of the third force sensor, and the other is connected at one end to the other end of the first air spring of the mounting base. During the test, the elastic body to be tested is placed between the two mass blocks. The second acceleration sensor, the number of which is at least two, and the two second acceleration sensors are respectively disposed on two mass blocks; The electromagnetic actuator is detachably connected to the second force sensor and the displacement sensor.

2. The heavy-load elastomer static and dynamic performance testing structure according to claim 1, characterized in that, The levitation module includes: An inertial platform, the upper surface of which is connected to the fixed load structure; A second air spring, the upper end of which is connected to the inertial platform, and the lower end of which is connected to the ground or the mounting platform; An air supply system, which is connected to the second air spring and the fixed load structure.

3. The heavy-load elastomer static and dynamic performance testing structure according to claim 1, characterized in that, The control module includes: A power oil source, wherein the power oil source is connected to the electro-hydraulic actuator; A control cabinet, which is electrically connected to the fixed load structure and the suspension module; A power amplifier, which is electrically connected to the electromagnetic actuator; The host computer is electrically connected to the fixed load structure, the suspension module, the power oil source, the control cabinet, and the power amplifier.

4. The heavy-load elastomer static and dynamic performance testing structure according to claim 2, characterized in that, The mass block includes: The outer casing has connecting horizontal plates on its upper and lower surfaces, and a connecting vertical plate is provided between the two connecting horizontal plates of the outer casing; Weight plates, wherein there are several weight plates, and the weight plates are stacked inside the outer shell; A positioning groove is formed on the lower surface of the outer shell and the upper surface of the weight plate; A positioning protrusion is formed on the lower surface of the weight plate, and the positioning groove matches the positioning protrusion. A locking assembly, located inside the housing, is used to lock the weight plate.

5. The heavy-load elastomer static and dynamic performance testing structure according to claim 4, characterized in that, The locking assembly includes: Two threaded rods are respectively fixedly disposed longitudinally on both sides inside the outer casing; Two rotating blocks are threadedly connected to the threaded rod. The fixing blocks are two in number, and the two fixing blocks are respectively sleeved and connected to the threaded rod, and are rotatably connected to the rotating block; The positioning plate is fixedly connected to the fixing block on both sides.

6. The heavy-load elastomer static and dynamic performance testing structure according to claim 2, characterized in that, The fixed load structure also includes: The electro-hydraulic actuator is connected to the loading beam via a displacement assembly.

7. The heavy-load elastomer static and dynamic performance testing structure according to claim 6, characterized in that, The displacement component includes: A lead screw, one end of which is connected to the loading crossbeam; A rotary drive motor is provided, the output end of which is connected to one end of the lead screw, and the lead screw is connected to the loading beam via the rotary drive motor. A fixing block is threadedly connected to the lead screw, and the electro-hydraulic actuator is connected to the fixing block.

8. A method for testing the static and dynamic properties of a heavy-load elastic body, characterized in that, The heavy-load elastomer static and dynamic performance test structure applied to any one of claims 1-7 includes: When testing static stiffness and damping ratio, the fixed load structure is in the first state, and a single load is applied to the elastic body under test through an electro-hydraulic actuator. When testing the first dynamic stiffness and damping ratio, the fixed load structure is in the first state, and a load with a frequency of 2 to 100 Hz is applied to the elastic body under test through an electro-hydraulic actuator. When testing the second dynamic stiffness, the suspension module is working, the fixed load structure is in the second state, and the test elastic body is subjected to a load with a frequency of 101 to 2000 Hz through the electromagnetic actuator. During impedance characteristic testing, the suspension module is in operation, the fixed load structure is in the second state, and the test elastic body is subjected to a load with a frequency of 101 to 2000 Hz through the electromagnetic actuator.

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