Structure and method for testing static and dynamic performance of heavy-load elastomer

Abstract

The embodiment of the invention discloses a heavy-load elastomer static and dynamic performance test structure and method. The heavy-load elastomer static and dynamic performance test structure provided by the embodiment of the invention comprises a fixed load structure, a suspension module and a control module. The invention aims to provide a heavy-load elastomer static and dynamic performance test structure for engineering actual demands, solves the defect that the existing single test structure is difficult to comprehensively test the static and dynamic performance of a heavy-load elastomer, and integrates an electro-hydraulic actuator and an electric test actuator during static and dynamic stiffness test, so that the test efficiency is improved, and the test cost is reduced. Two kinds of loading force are provided through a single structure, meanwhile, a fixed load structure subjected to complex mechanical design is suspended through the suspension module, vibration interference from a foundation is greatly reduced, and therefore the accuracy of static and dynamic performance parameter testing of the heavy-load elastomer is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of heavy-loaded elastomer testing, and in particular to a heavy-loaded elastomer static and dynamic performance testing structure. Background Art

[0002] Heavy-load elastomers, as a classic vibration reduction 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 the impact of the equipment on the surrounding environment.

[0003] The static and dynamic performance of heavy-loaded elastomers is the core technical indicator that affects their vibration isolation effect, mainly including parameters such as static stiffness, dynamic stiffness, damping ratio and impedance characteristics. In specific engineering applications, the most ideal way to obtain the above parameters is to conduct experimental tests through the static and dynamic characteristics test structure of heavy-loaded elastomers. So far, the existing single test structure only has the ability to test the static and dynamic performance of some small and medium-loaded elastomers, and it is difficult to realize the static and dynamic performance parameter testing of heavy-loaded elastomers. The main reasons include: 1) The existing test structure has a single function, and the heavy-loaded elastomer has many static and dynamic parameters, so it is difficult to design a single test structure; 2) The loading force required for heavy-loaded elastomers is large, even exceeding 100 tons in some cases, and conventional dynamic force loading methods are difficult to meet the medium and high frequency testing requirements; 3) The low coupling design with the outside world is difficult, and it is impossible to isolate the interference caused by the outside world during the dynamic performance test of heavy-loaded elastomers.

[0004] The existence of the above-mentioned problems has greatly affected the experimental testing of the static and dynamic performance parameters of heavy-loaded elastomers. In the absence of accurate parameters, there may be great technical risks in applying heavy-loaded elastomers to related fields. 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] To this end, a first aspect of the present invention provides a heavy-loaded elastomer static and dynamic performance testing structure.

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

[0008] In view of this, according to a first aspect of an embodiment of the present application, a heavy-loaded elastic body static and dynamic performance test structure is proposed, comprising:

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

[0010] Wherein, the fixed load structure includes an electro-hydraulic actuator and an electromagnetic actuator;

[0011] Wherein, when the fixed load structure applies a load to the elastic body through the electro-hydraulic actuator, the fixed load structure is in the first state, and when the fixed load structure applies a load to the elastic body to be tested through the electromagnetic actuator, the fixed load structure is in the second state;

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

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

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

[0015] A mounting base, the mounting base is arranged at the upper end of the suspension module, and the heavy-load elastic body to be tested during the test is arranged on the mounting base;

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

[0017] A loading beam, wherein the loading beam is liftably connected to the guide column, and the electro-hydraulic actuator is disposed on the loading beam;

[0018] A piston rod, the piston rod being connected to the electro-hydraulic actuator, and the piston rod applying a load to the elastic body to be tested through the electro-hydraulic actuator;

[0019] a first force sensor, the first force sensor being disposed on an upper side of the mounting base;

[0020] A displacement sensor, wherein the displacement sensor is integrated with the piston rod;

[0021] a second force sensor, the second force sensor being disposed at the lower end of the piston rod;

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

[0023] In a feasible implementation manner, when the fixed load structure is in the second state, it includes:

[0024] A second connecting seat, the number of the second connecting seat is four, one end of the second connecting seat is connected to the loading beam, the second connecting seat is respectively arranged at four corners of the loading beam, and the second connecting seat is detachably connected to the loading beam;

[0025] A third force sensor, wherein the number of the third force sensors is four and they are respectively arranged at the lower ends of the four second connecting seats;

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

[0027] Mass blocks, the number of the mass blocks is two, one of which is arranged at the other end of the first air spring connected to the third force sensor at one end, and the other mass block is arranged at the other end of the first air spring connected to the mounting base at one end, and the elastic body to be tested is arranged between the two elastic blocks during the test;

[0028] A second acceleration sensor, wherein the number of the second acceleration sensors is at least two, and the two second acceleration sensors are respectively arranged on two mass blocks;

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

[0030] In a feasible implementation, the suspension module includes:

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

[0032] a second air spring, wherein the upper end of the second air spring is connected to the inertia platform, and the lower end of the second air spring is connected to the ground or the mounting platform;

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

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

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

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

[0037] a power amplifier, the power amplifier being electrically connected to the electromagnetic actuator;

[0038] A 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 a feasible implementation manner, the mass block includes:

[0040] A shell, wherein the upper and lower surfaces of the shell have connecting horizontal plates, and a connecting vertical plate is provided between the two connecting horizontal plates of the shell;

[0041] The weight plates are multiple in number and are stacked inside the shell.

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

[0043] A positioning protrusion, wherein the positioning protrusion is provided on the lower surface of the weight plate, and the positioning groove is matched with the positioning protrusion;

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

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

[0046] Threaded rods, the number of the threaded rods is two, and the two threaded rods are respectively and longitudinally fixedly arranged on two sides of the interior of the shell;

[0047] Rotating blocks, the number of the rotating blocks is two, and the two rotating blocks are respectively threadedly connected to the threaded rod;

[0048] A fixed block, wherein the number of the fixed blocks is two, and the two fixed blocks are respectively sleeved and connected to the threaded rod, and are rotatably connected to the rotating block;

[0049] A positioning plate, two sides of which are respectively fixedly connected to the fixing blocks.

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

[0051] A displacement assembly, wherein the electro-hydraulic actuator is connected to the loading beam via the displacement assembly.

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

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

[0054] A rotation drive motor, wherein the output end of the rotation drive motor is connected to one end of the screw rod, and the screw rod is connected to the loading beam through the rotation drive motor;

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

[0056] According to a second aspect of an embodiment of the present application, a method for testing the static and dynamic performance of a heavy-loaded elastic body is provided, which is applied to any one of the above-mentioned static and dynamic performance testing structures of a heavy-loaded elastic body, comprising:

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

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

[0059] When testing the second dynamic stiffness, the suspension module works, the fixed load structure is in the second state, and a load with a frequency of 101 to 2000 Hz is applied to the heavy-load elastic body under test through the electromagnetic actuator;

[0060] During the impedance characteristic test, the suspension module is working, the fixed load structure is in the second state, and a load with a frequency of 101 to 2000 Hz is applied to the heavy-loaded elastomer under test through the electromagnetic actuator.

[0061] Compared with the prior art, the present invention includes at least the following beneficial effects: the present invention is the first to integrate the static preloading structure of the heavy-loaded elastomer and the dynamic load loading structure into a design, and through the mutual cooperation of different components, a single test structure is used for the first time to realize static and dynamic performance tests of multiple heavy-loaded elastomers, thus solving the problems of the existing heavy-loaded elastomer test structure with single testing function and insufficient heavy-load testing capability.

[0062] At the same time, the present invention adopts a suspension module and sets the fixed load structure on the suspension module, so that the fixed load structure can be suspended above the ground. The influence of external vibration on the test structure can be greatly reduced while ensuring the working reliability of the test structure, thereby improving the test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0064] Figure 1 A structural block diagram of a heavy-loaded elastic body static and dynamic performance test structure provided in an embodiment of the present application;

[0065] Figure 2 An axonometric diagram of a static and dynamic performance test structure of a heavy-duty elastic body provided in an embodiment of the present application;

[0066] Figure 3An axonometric view of a fixed load structure according to an embodiment of the present application.

[0067] in, Figure 1 The corresponding relationship between the reference numerals and the component names 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 DESCRIPTION

[0072] In order to better understand the above-mentioned technical scheme, the technical scheme of the embodiments of the present application is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical scheme of the embodiments of the present application, rather than limitations on the technical scheme of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments may be combined with each other.

[0073] like Figure 1-3 As shown, according to the first aspect of the embodiment of the present application, a static and dynamic performance test structure of a heavy-loaded elastic body is proposed, comprising: a fixed load structure 100, wherein the fixed load structure 100 is used to fix the heavy-loaded elastic body and apply a load to the heavy-loaded elastic body; wherein the fixed load structure 100 comprises an electro-hydraulic actuator 110 and an electromagnetic actuator 120; wherein, when the fixed load structure 100 applies a load to the elastic body through the electro-hydraulic actuator 110, the fixed load structure 100 is in a first state, wherein the fixed load structure 100 is in a first state. When a load is applied to the elastic body under test through the electromagnetic actuator 120, the fixed load structure 100 is in the second state; the suspension module 200, the suspension module 200 is arranged on the ground or the installation platform, and the fixed load structure 100 is arranged at the upper end of the suspension module 200; the control module 300, 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 heavy-load elastomer static and dynamic performance testing structure provided in the embodiment of the present application includes a fixed load structure 100 , a suspension module 200 and a control module 300 .

[0075] Among them, the fixed load structure 100 is used to fix the heavy-loaded elastomer and apply a load to the heavy-loaded elastomer, and the fixed load structure 100 includes an electro-hydraulic actuator 110 and an electromagnetic actuator 120. When the heavy-loaded elastomer needs to be tested for static stiffness and low-frequency dynamic stiffness below 100 Hz, the heavy-loaded elastomer is loaded by the electro-hydraulic actuator 110. The frequency of the load applied by the electro-hydraulic actuator 110 is low, and the load limit value that can be achieved is larger. When the heavy-loaded elastomer needs to be loaded with high-frequency dynamic stiffness above 100 Hz, the heavy-loaded elastomer is loaded by the electromagnetic actuator 120. The load limit value applied by the electromagnetic actuator 120 is relatively low, but the frequency of the load applied by the electromagnetic actuator 120 is high.

[0076] Among them, the fixed load structure 100 has a first state and a second state. When the static stiffness and low-frequency dynamic stiffness tests are performed on the heavy-loaded elastomer through the electro-hydraulic actuator 110, the fixed load structure 100 is in the first state. When the high-frequency dynamic stiffness test is performed on the heavy-loaded elastomer through the electromagnetic actuator 120, the fixed load structure 100 can be adjusted to the second state.

[0077] Among them, the suspension module 200 is arranged on the lower side of the fixed load structure 100. The suspension module 200 is arranged 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 vibration around the test structure to affect the test results, thereby ensuring the stability of the test structure. On the other hand, it can avoid the vibration caused by the heavy-load elastomer during the test process to affect the surrounding environment, thereby increasing the flexibility of the test structure installation.

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

[0079] The purpose of the present invention is to provide a static and dynamic performance test structure for a heavy-loaded elastomer in response to actual engineering needs, so as to solve the problem that the existing single test structure is difficult to comprehensively test the static and dynamic performance of the heavy-loaded elastomer. The electro-hydraulic actuator 110 and the electric measuring actuator are integrated in the static and dynamic stiffness test, and two loading forces are provided through a single structure. At the same time, the fixed load structure 100 with complex mechanical design is suspended through the suspension module 200, which greatly reduces the vibration interference from the foundation, thereby improving the accuracy of the static and dynamic performance parameter test of the heavy-loaded elastomer.

[0080] like Figure 1-3As shown, when the fixed load structure 100 is in the first state, it also includes: a mounting base 130, the mounting base 130 is arranged at the upper end of the suspension module 200, and the heavy-load elastic body to be tested during the test is arranged on the mounting base 130; a guide column 140, the lower end of the guide column 140 is arranged on the mounting base 130; a loading beam 150, the loading beam 150 is connected to the guide column 140 in a liftable manner, and the electro-hydraulic actuator 110 is arranged on the loading beam 150; a piston rod 160, the piston rod 160 is arranged on the piston rod 160, and the piston rod 160 is arranged on the piston rod 160. The 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, the first force sensor 170 is arranged on the upper side of the mounting base 130; a displacement sensor 180, the displacement sensor 180 is integrated with the piston rod 160; a second force sensor, the second force sensor is arranged at the lower end of the piston rod 160; a first acceleration sensor, the 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 a mounting foundation for the fixed load structure 100. The number of guide columns 140 in this embodiment is four. The lower end of the guide column 140 is arranged on the mounting base 130. The loading beam 150 is connected to the guide column 140 in a liftable manner. The loading beam 150 is moved up and down through the guide column 140, so that when testing the heavy-loaded elastomer, the loading beam 150 can be adjusted according to the required height. The electro-hydraulic actuator 110 is arranged on the loading beam 150, and the piston rod 160 is connected to the electro-hydraulic actuator 110. During the test, the electric The hydraulic actuator 110 and the piston rod 160 realize the load loading on the heavy-loaded elastomer. The first force sensor 170 is arranged on the upper side of the mounting base 130. The first force sensor 170 is used to monitor the torque on the back side of the heavy-loaded elastomer during the test. The displacement sensor 180 and the second force sensor are arranged at the lower end of the piston rod 160 to monitor the force and deformation degree of the heavy-loaded elastomer on the force side during the test. The first acceleration sensor is arranged on the mounting base 130, and the static stiffness, dynamic stiffness (low frequency) and damping ratio parameters of the heavy-loaded elastomer can be determined based on the obtained vibration acceleration signal.

[0083] When conducting static stiffness tests and low-frequency dynamic stiffness tests below one hundred hertz, the heavy-loaded elastomer is tested using the fixed load structure 100 in this state. In actual use, the heavy-loaded elastomer is placed on the mounting platform, and the height of the loading beam 150 is adjusted by the guide column 140. Then, the electro-hydraulic actuator 110 controls the piston rod 160 to apply load to the heavy-loaded elastomer, and the various parameters of the heavy-loaded 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-loaded elastomer.

[0084] like Figure 1-3 As shown, when the fixed load structure 100 is in the second state, it also includes: a second connecting seat 111, the number of the second connecting seats 111 is four, one end of the second connecting seat 111 is connected to the loading beam 150, the second connecting seats 111 are respectively arranged at the four corners of the loading beam 150, and the second connecting seat 111 is detachably connected to the loading beam 150; a third force sensor 112, the number of the third force sensors 112 is four, and they are respectively arranged at the lower ends of the four second connecting seats 111; a first air spring 113, the number of the first air spring 113 is eight, one end of four of the first air springs 113 is connected to the third force sensor 112 arranged on the second connecting seat 111, and one end of the other four first air springs 113 Connected to the mounting base 130, the first air spring 113 is detachably connected to the mounting base 130; a mass block 114, the number of the mass blocks 114 is two, one of the mass blocks 114 is arranged at the other end of the first air spring 113 connected to the third force sensor 112 at one end, and the other mass block 114 is arranged at the other end of the first air spring 113 connected to the mounting base 130 at one end, and the elastic body to be tested is arranged between the two elastic blocks during the test; a second acceleration sensor 115, the number of the second acceleration sensors 115 is at least two, and the two second acceleration sensors 115 are respectively arranged on the two mass blocks 114; wherein 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 the first air springs 113 is eight.

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

[0088] One end of the other four first air springs 113 is detachably disposed on the mounting base 130 , and another mass block 114 is disposed on the upper ends of the four first air springs 113 .

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

[0090] In actual use, the fixed load structure 100 is first adjusted to the second state, and the loading beam 150 is adjusted to the required height through the guide column 140, and the heavy-loaded elastic body is set between the two mass blocks 114. Because the load that can be applied by the electromagnetic actuator 120 is limited, the 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 load can be applied to the heavy-loaded elastic body through the mass block. The third force sensor 112 is used to monitor the load on the heavy-loaded elastic body. According to the indication of the third force sensor 112, the first air spring 113 is adjusted until the load on the heavy-loaded elastic body reaches the required value, and then a high-frequency (above one hundred hertz) dynamic load is applied to the heavy-loaded elastic body through the electromagnetic actuator 120 to test the high-frequency dynamic stiffness and impedance characteristics of the electric measuring actuator.

[0091] The technical solution not only meets the frequency requirements of high-frequency dynamic stiffness testing for dynamic loads through the electromagnetic actuator 120, but also realizes the load requirements for heavy-load elastic body stiffness testing through the air spring and the third force sensor 112 structure. The structure is organically combined with the structure for testing static stiffness and low-frequency dynamic stiffness, so that the test structure can meet the heavy-load elastic body stiffness testing and impedance testing in 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, and 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 inertial platform 210 is lifted off the ground through the second air spring 220. When the ground, the mounting platform or the test structure vibrates, the second air spring 220 can achieve buffering and shock absorption.

[0096] It can be 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 the present technical solution, the suspension module 200 achieves buffering and shock absorption through the second air spring 220, which, on the one hand, prevents the vibration in the environment from affecting the test results of the test structure, and on the other hand, prevents the vibration caused by the test structure from affecting the surrounding environment. At the same time, this function is achieved through the second air spring 220, which has the same structure as the first air spring 113 of the fixed load structure 100, is easy to produce and install, and the first air spring 113 and the second air spring 220 share an air supply system 230, which increases the simplicity of the present 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 load is applied to the electro-hydraulic actuator 110 through the power oil source 310 .

[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 sensors and actuators are powered on and off through the control cabinet 320 .

[0103] Among them, the host computer 340 is electrically connected to the power oil source 310, the control cabinet 320, the power amplifier 330 and the air supply system 230. The integrated control of the test structure is realized through the host computer 340, and the data collection, data calculation and analysis of each sensor of the test structure are realized through the host computer 340, which improves the usability of the test structure and reduces the workload of the operator.

[0104] like Figure 1-3 As shown, the mass block 114 includes: a shell, the upper and lower surfaces of the shell have connecting horizontal plates, and a connecting vertical plate is provided between the two connecting horizontal plates of the shell; a weight plate, the number of the weight plates is several, and the weight plates are stacked inside the shell. A positioning groove, the positioning groove is opened on the lower surface of the shell and the upper surface of the weight plate; a positioning protrusion, the positioning protrusion is opened on the lower surface of the weight plate, and the positioning groove fits with the positioning protrusion; a locking assembly, the locking assembly is positioned inside the shell and is used to lock the weight plate.

[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] There are several weight plates, which are stacked inside the shell.

[0107] Among them, the positioning groove is arranged on the lower surface of the shell and the upper surface of the weight plate, the positioning protrusion is arranged on the lower surface of the weight plate, the positioning groove corresponds to the positioning protrusion, and is used to limit the weight plate to reduce the possibility of misalignment of adjacent weight plates during the test. The locking assembly is used to fix the weight plate to avoid misalignment or shaking of the weight plate during the test.

[0108] During use, several weight plates are stacked inside the shell. The number of weight plates can be increased or decreased according to the quality requirements of the mass block 114 in the test. The weight of the mass block 114 is adjusted by adjusting the number of weight plates. When the weight plates are stacked, the positioning grooves need to be matched with the positioning protrusions. After the weight plates are stacked, there will be gaps on the upper sides of the weight plates, which are prone to shaking during testing. Therefore, a locking assembly is added to limit the weight plates through the locking assembly to prevent the weight plates from shaking.

[0109] like Figure 1-3 As shown, the locking assembly includes: a threaded rod, the number of the threaded rods is two, and the two threaded rods are respectively longitudinally fixed on both sides of the inside of the shell; a rotating block, the number of the rotating blocks is two, and the two rotating blocks are threadedly connected to the threaded rod; a fixed block, the number of the fixed blocks is two, and the two fixed blocks are respectively sleeved and connected to the threaded rod, and rotatably connected to the rotating block; a positioning plate, the two sides of the positioning plate are respectively fixedly connected to the fixed blocks.

[0110] In this technical solution, the locking assembly includes a threaded rod, a fixed block, a rotating block and a positioning plate, wherein there are two threaded rods, which are arranged on both sides of the inside of the shell, the rotating block is threadedly connected to the threaded rod, the fixed block is sleeved and connected to the threaded rod and rotatably connected to the threaded block, and at the same time, the two fixed blocks are respectively fixedly connected to the positioning plate.

[0111] After adjusting the positioning plate to the required number, rotate the rotating block. Since the rotating block is threadedly connected to the threaded rod, the rotating block can be rotated to realize the lifting and lowering of 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 the positioning plate can be driven to rise and fall by rotating the rotating block.

[0112] During actual use, the swivel block is first rotated to drive the positioning plate up, providing operating space for increasing or decreasing the weight plate. When the weight plate is adjusted, the swivel block is rotated to drive the positioning plate down, so that the positioning plate is close to the uppermost weight plate, thereby locking the weight plate.

[0113] This technical solution is easy to operate and has flexible effects. Any number of weight plates can be locked simply by adjusting the rotating block, which reduces 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 via the displacement assembly.

[0115] In this technical solution, the fixed load structure 100 also includes a displacement component, and 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 a load to the heavy-loaded elastomer under test at any position on the horizontal plane, thereby further improving the flexibility of the 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-load elastic body at any position on the horizontal plane.

[0117] like Figure 1-3 As shown, the displacement assembly includes: a screw rod, 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 screw rod, and the screw rod is connected to the loading beam 150 through the rotation drive motor; a fixed block, the fixed block is threadedly connected to the screw rod, and the electro-hydraulic actuator 110 is connected to the fixed block.

[0118] In this technical solution, the displacement assembly includes a screw rod, a rotation drive motor and a fixed block.

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

[0120] The rotating drive motor can drive the lead screw to move axially, and at the same time, the driving end of the rotating drive motor can rotate as a whole, thereby driving the lead screw to rotate with the driving end as the rotation center.

[0121] This structure can realize that the fixed block appears at any position of the horizontal plane within the range only through a single screw rod and a single drive motor, and can achieve the same technical effect as a cross screw rod through a simple structure.

[0122] like Figure 1-3 As shown, the second aspect of the embodiment of the present application proposes a method for testing the static and dynamic performance of a heavy-loaded elastic body, which is applied to any of the above-mentioned static and dynamic performance testing structures of a heavy-loaded elastic body, comprising:

[0123] When testing the static stiffness and damping ratio, the fixed load structure 100 is in the first state, and a single load is applied to the heavy-loaded elastic body under test 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 heavy-loaded elastic body under test through the electro-hydraulic actuator 110; when testing the second dynamic stiffness, the suspension module 200 works, 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 heavy-loaded elastic body under test through the electromagnetic actuator 120; when testing the impedance characteristics, the suspension module 200 works, 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 heavy-loaded elastic body under test through the electromagnetic actuator 120.

[0124] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0125] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0126] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0127] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heavy-loaded elastic body static and dynamic performance test structure, characterized in that: include: A fixed load structure, wherein the fixed load structure is used to fix the heavy-load elastic body and apply a load to the heavy-load elastic body; Wherein, the fixed load structure includes an electro-hydraulic actuator and an electromagnetic actuator; Wherein, when the fixed load structure applies a load to the elastic body through the electro-hydraulic actuator, the fixed load structure is in the first state, and when the fixed load structure applies a load to the elastic body to be tested through the electromagnetic actuator, the fixed load structure is in the second state; A suspension module, wherein the suspension module is disposed on the ground or on a mounting platform, and the fixed load structure is disposed on an upper end of the suspension module; A control module is electrically connected to the fixed load structure and the suspension module, and is used to drive the fixed load structure and the suspension module and transmit electrical signals.

2. The heavy-load elastic body static and dynamic performance testing structure according to claim 1 is characterized in that: When the fixed load structure is in the first state, it also includes: A mounting base, the mounting base is arranged at the upper end of the suspension module, and the heavy-load elastic body to be tested during the test is arranged on the mounting base; A guide column, the lower end of which is disposed on the mounting base; A loading beam, wherein the loading beam is liftably connected to the guide column, and the electro-hydraulic actuator is disposed on the loading beam; A piston rod, the piston rod being connected to the electro-hydraulic actuator, and the piston rod applying a load to the elastic body to be tested through the electro-hydraulic actuator; a first force sensor, the first force sensor being disposed on an upper side of the mounting base; A displacement sensor, wherein the displacement sensor is integrated with the piston rod; a second force sensor, the second force sensor being disposed at the lower end of the piston rod; A first acceleration sensor is fixedly connected to the mounting base.

3. The static and dynamic performance testing structure for heavy-loaded elastic body according to claim 2 is characterized in that: When the fixed load structure is in the second state, it also includes: A second connecting seat, the number of the second connecting seat is four, one end of the second connecting seat is connected to the loading beam, the second connecting seat is respectively arranged at four corners of the loading beam, and the second connecting seat is detachably connected to the loading beam; A third force sensor, wherein the number of the third force sensors is four and they are respectively arranged at the lower ends of the four second connecting seats; First air springs, the number of the first air springs is eight, one end of four of the first air springs is connected to the third force sensor disposed on the second connecting seat, one end of the other four first air springs is connected to the mounting base, and the first air springs are detachably connected to the mounting base; Mass blocks, the number of the mass blocks is two, one of which is arranged at the other end of the first air spring connected to the third force sensor at one end, and the other mass block is arranged at the other end of the first air spring connected to the mounting base at one end, and the elastic body to be tested is arranged between the two elastic blocks during the test; A second acceleration sensor, wherein the number of the second acceleration sensors is at least two, and the two second acceleration sensors are respectively arranged on two mass blocks; Wherein, the electromagnetic actuator is detachably connected to the second force sensor and the displacement sensor.

4. The heavy-load elastic body static and dynamic performance testing structure according to claim 1, characterized in that: The suspension module comprises: An inertial platform, the upper surface of which is connected to the fixed load structure; a second air spring, wherein the upper end of the second air spring is connected to the inertia platform, and the lower end of the second air spring is connected to the ground or the mounting platform; An air supply system is connected to the second air spring and the fixed load structure.

5. The heavy-load elastic body static and dynamic performance testing structure according to claim 1, characterized in that: The control module comprises: A power oil source, the power oil source being connected to the electro-hydraulic actuator; A control cabinet, the control cabinet being electrically connected to the fixed load structure and the suspension module; a power amplifier, the power amplifier being electrically connected to the electromagnetic actuator; A host computer is electrically connected to the fixed load structure, the suspension module, the power oil source, the control cabinet and the power amplifier.

6. The heavy-load elastic body static and dynamic performance testing structure according to claim 2, characterized in that: The mass block comprises: A shell, wherein the upper and lower surfaces of the shell have connecting horizontal plates, and a connecting vertical plate is provided between the two connecting horizontal plates of the shell; A plurality of weight plates are stacked inside the housing; A positioning groove, the positioning groove is opened on the lower surface of the shell and the upper surface of the weight plate; A positioning protrusion, wherein the positioning protrusion is provided on the lower surface of the weight plate, and the positioning groove is matched with the positioning protrusion; A locking assembly is positioned inside the housing and is used to lock the weight plate.

7. The heavy-load elastic body static and dynamic performance testing structure according to claim 6, characterized in that: The locking assembly comprises: Threaded rods, the number of the threaded rods is two, and the two threaded rods are respectively and longitudinally fixedly arranged on two sides of the interior of the shell; Rotating blocks, the number of the rotating blocks is two, and the two rotating blocks are respectively threadedly connected to the threaded rod; A fixed block, wherein the number of the fixed blocks is two, and the two fixed blocks are respectively sleeved and connected to the threaded rod, and are rotatably connected to the rotating block; A positioning plate, two sides of which are respectively fixedly connected to the fixing blocks.

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

9. The heavy-load elastic body static and dynamic performance testing structure according to claim 8, characterized in that: The displacement assembly comprises: A screw rod, one end of which is connected to the loading beam; A rotation drive motor, wherein the output end of the rotation drive motor is connected to one end of the screw rod, and the screw rod is connected to the loading beam through the rotation drive motor; A fixed block is threadedly connected to the screw rod, and the electro-hydraulic actuator is connected to the fixed block.

10. A method for testing the static and dynamic properties of a heavy-loaded elastic body, characterized in that: The static and dynamic performance test structure of a heavy-loaded elastic body used in any one of claims 1 to 9 above comprises: When testing the static stiffness and damping ratio, the fixed load structure is in the first state, and a single load is applied to the heavy-load elastic body under test through the electro-hydraulic actuator; When testing the first dynamic stiffness and damping ratio, the fixed load structure is in a first state, and a load with a frequency of 2 to 100 Hz is applied to the heavy-load elastic body under test through the electro-hydraulic actuator; When testing the second dynamic stiffness, the suspension module works, the fixed load structure is in the second state, and a load with a frequency of 101 to 2000 Hz is applied to the heavy-load elastic body under test through the electromagnetic actuator; During the impedance characteristic test, the suspension module is working, the fixed load structure is in the second state, and a load with a frequency of 101 to 2000 Hz is applied to the heavy-loaded elastomer under test through the electromagnetic actuator.

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