A cyclic dynamic load under formation characteristics simulation test device and test method

Abstract

This application provides a test apparatus and method for simulating formation characteristics under cyclic dynamic loading. The test apparatus includes a model box, a vibration unit, a receiving unit, and a control unit. The vibration unit is mounted on the model box, the receiving unit is embedded within the formation sample, and the control unit is communicatively connected to both the vibration unit and the receiving unit. The vibration unit outputs cyclic dynamic load to the formation sample, and the receiving unit receives and collects parameters of the cyclic dynamic load transmitted by the formation sample. The control unit calculates the attenuation of the formation sample to the cyclic dynamic load using the output parameters of the vibration unit and the collected parameters of the receiving unit. Based on this attenuation, the formation characteristics of the formation sample are quantitatively characterized, providing a quantitative basis for underground space safety early warning.

Description

Technical Field

[0001] This application relates to the field of underground structure model testing technology, and in particular to a test device and test method for simulating the characteristics of strata under cyclic dynamic load. Background Technology

[0002] With social development and continuous urbanization, the utilization rate of urban underground space is also constantly increasing. However, the cyclical dynamic load conditions such as the increase in vehicles, engineering construction, and rail transit in cities will have a significant impact on urban underground space. These cyclical dynamic loads will affect the structural stability of the underground strata, reduce the service life of the underground space, and cause serious safety hazards.

[0003] Currently, the analysis of stratigraphic characteristics mainly relies on theoretical modeling and ground subsidence analysis. These research methods and measurement techniques can describe stratigraphic characteristics to a certain extent, thus providing guidance for safety early warning in underground spaces. However, theoretical modeling analysis struggles to account for the impact of differences in stratigraphic characteristics across different regions, and due to the large number of parameters involved in stratigraphic characteristics, it is impossible to accurately determine their reasonable range, resulting in significant errors. Ground subsidence analysis, on the other hand, can only measure macroscopic subsidence and changes that have already occurred in the stratigraphy. By the time the measurement results are obtained, the detected stratigraphy has already undergone displacement changes, and it cannot reveal the intrinsic relationship between changes in the physical and mechanical properties of the stratigraphy and ground subsidence.

[0004] Therefore, how to provide a test device and method for simulating formation characteristics under cyclic dynamic loading, which can quantitatively analyze the formation characteristics under cyclic dynamic loading conditions, has become a research focus for people in this field. Summary of the Invention

[0005] This application aims to at least partially address one of the technical problems in the related art.

[0006] Therefore, the first objective of this application is to propose a test device and test method for simulating the characteristics of strata under cyclic dynamic loading, which can establish the relationship between the attenuation of strata to vibration and the critical point of cyclic dynamic loading and strata collapse, and provide quantitative data for the study of the characteristics of underground strata.

[0007] To achieve the above objectives, the first aspect of this application provides a formation characteristic simulation test apparatus under cyclic dynamic loading, comprising:

[0008] A model box, wherein the bottom of the model box has an opening, the opening extends from the bottom of the model box to the top to form a cavity, and the cavity is filled with a formation sample;

[0009] A vibration unit is installed on the upper part of the model box and simulates cyclic dynamic load output to the formation sample.

[0010] A receiving unit is located inside the formation sample and is used to collect cyclic dynamic loads on the surrounding formation sample and output the received parameters of the cyclic dynamic loads.

[0011] The control unit is communicatively connected to the vibration unit and the receiving unit, and is used to control the output parameters of the cyclic dynamic load output by the vibration unit and receive the received parameters of the cyclic dynamic load output by the receiving unit; the control unit is configured to output the attenuation amount of the formation sample to the cyclic dynamic load and the quantitative characterization of the formation characteristics of the formation sample based on the output parameters and received parameters of the cyclic dynamic load.

[0012] In one possible implementation, the vibration unit consists of multiple dispersed vibrators that work together to simulate cyclic dynamic loading on the formation sample.

[0013] In one possible implementation, the vibrator includes a vibrating motor and an eccentric wheel connected to each other, the eccentric wheel generating periodic vibrations under the drive of the vibrating motor.

[0014] In one possible implementation, the receiving unit consists of multiple diffusely distributed receivers to receive and collect parameters from cyclic dynamic loads at different locations of the formation sample.

[0015] In one possible implementation, the receiver includes a vibration receiving sensor and a memory, the vibration receiving sensor being used to receive cyclic dynamic loads transmitted from the formation sample, and the memory being used to store parameters of the cyclic dynamic loads collected by the vibration receiving sensor.

[0016] In one possible implementation, the receiver further includes a housing and a base, with the vibration receiving sensor and the memory jointly disposed on the base and located within a sealed cavity formed by the interconnection of the housing and the base, spaced apart from the formation sample.

[0017] In one possible implementation, the bottom of the model box is further provided with a crossbeam that extends through the opening, providing bottom support for the formation sample to fill the cavity.

[0018] In one possible implementation, the control unit includes:

[0019] The controller is communicatively connected to the vibration unit and is used to control the output parameters of the cyclic dynamic load output by the vibration unit.

[0020] An electronic computer is communicatively connected to the controller and the receiving unit for driving control of the test device, recording and processing of test data.

[0021] To achieve the above objectives, a second aspect of this application provides a method for simulating formation characteristics under cyclic dynamic loading, comprising using the formation characteristic simulation test apparatus under cyclic dynamic loading as described in any of the above embodiments, and further comprising:

[0022] The model box containing the formation sample is provided, and the receiving unit is pre-embedded in a preset position within the formation sample to collect cyclic dynamic load data of the surrounding formation sample and output the receiving parameters of the cyclic dynamic load.

[0023] A vibration unit is installed on the top of the model box to simulate the output of cyclic dynamic load to the formation sample until the formation sample inside the model box experiences a fault or collapse.

[0024] The control unit outputs a quantitative relationship between the attenuation of the formation sample to the cyclic dynamic load and the formation characteristics of the formation sample, based on the output parameters of the cyclic dynamic load output by the vibration unit and the received parameters of the cyclic dynamic load output by the receiving unit.

[0025] In one possible implementation, prior to the step of placing the vibration unit on top of the model box, the method further includes:

[0026] The cyclic dynamic load level of the target area was measured to obtain the measured data of the cyclic dynamic load in the target area;

[0027] The measured data are statistically analyzed and processed to simulate and calculate the positional distribution and vibration conditions of the vibration unit at the top of the model box.

[0028] This application includes at least the following beneficial effects:

[0029] This application provides a test apparatus and method for simulating formation characteristics under cyclic dynamic loading. The test apparatus includes a model box, a vibration unit, a receiving unit, and a control unit. The vibration unit is mounted on the model box, the receiving unit is embedded in the formation sample, and the control unit is communicatively connected to the vibration unit and the receiving unit. The vibration unit outputs cyclic dynamic load to the formation sample, and the receiving unit receives and collects parameters of the cyclic dynamic load transmitted by the formation sample. The control unit calculates the attenuation of the formation sample to the cyclic dynamic load using the output parameters of the vibration unit and the collected parameters of the receiving unit. Based on the attenuation of the formation sample to the cyclic dynamic load, the formation characteristics of the formation sample are quantitatively characterized, providing a quantitative basis for underground space safety early warning.

[0030] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0031] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0032] Figure 1 This is a schematic diagram of a formation characteristic simulation test device under cyclic dynamic loading provided in an embodiment of this application.

[0033] Figure 2 This is a schematic diagram of the structure of a receiver provided in an embodiment of this application.

[0034] Figure 3 This is a schematic diagram of the structure of a vibrator provided in an embodiment of this application.

[0035] Figure 4 This is a schematic flowchart of a method for simulating formation characteristics under cyclic dynamic loading, provided in an embodiment of this application.

[0036] 100 Model box; 110 Formation sample; 120 Crossbeam; 200 Receiving unit; 210 Receiver; 211 Vibration receiving sensor; 212 Memory; 300 Vibration unit; 310 Vibrator; 311 Vibration motor; 312 Eccentric wheel; 330 Vibration sensor; 400 Control unit. Detailed Implementation

[0037] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0038] This application provides a test apparatus and method for simulating the characteristics of strata under cyclic dynamic loading, in order to establish the relationship between the attenuation of strata to vibration and the critical point of cyclic dynamic loading and strata collapse, and to provide quantitative data for the study of the characteristics of underground strata.

[0039] According to one aspect of the embodiments of this application, a test apparatus for simulating formation characteristics under cyclic dynamic loading is provided, such as... Figure 1 As shown, the test device includes a model box 100, a vibration unit 300, a receiving unit 200, and a control unit 400.

[0040] The model box 100 has an opening at its bottom, forming a cavity from the bottom to the top of the model box 100. A formation sample 110 is loaded within this cavity. A vibration unit 300 is positioned at the top of the model box 100 to simulate cyclic dynamic load output to the formation sample 110. A receiving unit 200 is located inside the formation sample 110, buried within it, and is used to receive and collect parameters of the cyclic dynamic load from the formation sample 110 surrounding the receiving unit 200, and output the received parameters of the cyclic dynamic load. A control unit 400 is communicatively connected to both the vibration unit 300 and the receiving unit 200 to control the output parameters of the cyclic dynamic load from the vibration unit 300 and to receive the received parameters of the cyclic dynamic load from the receiving unit 200.

[0041] The working principle and effect of the test device are as follows: the vibration unit 300 simulates the actual working conditions of the target area and continuously outputs cyclic dynamic load to the formation sample 110. The receiving unit 200 buried in the formation sample 110 collects the vibration waveform parameters of the cyclic dynamic load around it. The control unit 400 then calculates the attenuation of the formation sample 110 to the cyclic dynamic load based on the received parameters output by the receiving unit 200 and the output parameters output by the vibration unit 300, and characterizes the formation characteristics of the formation sample 110 based on the attenuation.

[0042] Specifically, when the geological characteristics of the stratum sample 110 are not affected by cyclic dynamic load, the receiving parameters output by the receiving unit 200 buried in the stratum sample 110 should remain relatively stable. Correspondingly, the attenuation of the stratum sample 110 to the cyclic dynamic load between the receiving unit 200 and the vibration unit 300 should also remain within a preset fluctuation range. When the stratum sample 110 undergoes structural changes such as internal faulting or collapse under cyclic dynamic load, the structural changes of the stratum sample 110 will lead to a sudden change in its attenuation to the cyclic dynamic load. In other words, by continuously monitoring the attenuation of the stratum sample 110 to the cyclic dynamic load using the control unit 400, and detecting a sudden change in the attenuation, it indicates that the stratum sample 110 in the model box 100 has undergone structural changes such as faulting or collapse. This achieves a quantitative characterization of the geological characteristics of the stratum sample 110 by the utilization rate attenuation, providing quantitative data reference for the study of underground space geological characteristics.

[0043] It should be noted that the stratum sample 110 should be obtained from the stratum of the actual target area so that the model box 100 can be simulated and designed according to the prototype working conditions of the target area. The output parameters of the cyclic dynamic load output by the vibration unit 300 should also be measured and simulated according to the prototype working conditions of the target area to simulate the stratum characteristics and cyclic dynamic load properties of the original target area to the greatest extent, so as to ensure the consistency of stratum characteristics and the accuracy of dynamic load cyclic output.

[0044] As an example, such as Figure 3 As shown, the vibration unit 300 can be composed of multiple dispersed vibrators 310. These vibrators 310 work together to output simulated cyclic dynamic loads to the formation sample 110. Considering the differences in formation characteristics across different regions, before setting the vibration conditions for the cyclic dynamic load, the actual level of the cyclic dynamic load should be measured at the target sampling site, and the data should be statistically analyzed and processed before being used as the vibration condition input. Simultaneously, it is also necessary to calculate the number and distribution of the vibrators 310. Only by rationally arranging the number and position of the vibrators 310 on the formation sample 110 can the cyclic dynamic load simulated by the vibration unit 300 be made to match the actual formation conditions at the target sampling site to the greatest extent possible, thus ensuring the accuracy of the cyclic dynamic load simulated by the vibration unit 300.

[0045] In one embodiment, the vibrator 310 includes a vibration motor 311 and an eccentric wheel 312 connected to each other. The eccentric wheel 312 generates periodic vibrations under the drive of the vibration motor 311. That is, by controlling the frequency, angular velocity, and operating time of the vibration motor 311, the vibration waveform parameters generated by each vibrator 310 can be controlled. Multiple different vibrators 310 can be combined according to a certain rule to generate cyclic dynamic loads with different vibration patterns, meeting the vibration requirements under different vibration conditions. The vibration waveform parameters include vibration amplitude, vibration frequency, and vibration duration, which are the output parameters simulated by the vibration unit.

[0046] In one specific embodiment, the vibrator 310 further includes a base with a mounting plate on it. The vibration motor 311 and the eccentric wheel 312 are fixed to the base via the mounting plate. The base has a housing with an opening at the bottom so that the vibration motor 311 and the eccentric wheel 312 can be located in the sealed cavity between the base and the housing, ensuring the stability of the vibrator 310 during continuous vibration.

[0047] Preferably, the vibrator 310 also includes a sensor, which may be a vibration sensor 330, mounted on the base, for detecting and characterizing the vibration waveform parameters generated by the vibrator 310, to ensure that the vibration generated by the vibrator 310 matches the preset vibration conditions.

[0048] As an example, such as Figure 2The receiving unit 200 can also be composed of multiple diffusely distributed receivers 210 to receive and acquire parameters from cyclic dynamic loads at different locations of the formation sample 110. Those skilled in the art will know that the formation sample 110 attenuates the transmission of the input cyclic dynamic load, and the amount of attenuation is positively correlated with the distance between the vibrator 310 and the receiver 210, resulting in different attenuation amounts at different locations of the formation sample 110 under cyclic dynamic load conditions. Therefore, in this embodiment, multiple receivers 210 are diffusely distributed at different locations of the formation sample 110 to monitor the formation characteristics of the formation sample 110 at different locations under cyclic dynamic load conditions.

[0049] In one embodiment, the receiver 210 includes a vibration receiving sensor 211 and a memory 212. The vibration receiving sensor 211 is used to receive and collect parameters of cyclic dynamic load transmitted from the formation sample 110, so as to monitor the formation characteristics of the formation sample 110 at different locations under cyclic dynamic load conditions. The memory 212 is used to store the received parameters of cyclic dynamic load collected by the vibration receiving sensor 211, so that the control unit 400 can determine the formation characteristics of the formation sample 110 near the corresponding location of the receiver 210 based on the received parameters stored in the memory 212.

[0050] In one specific embodiment, the receiver 210 further includes a base, a housing, and a casing. The vibration receiving sensor 211 and the memory 212 are jointly disposed on the base and located within a sealed cavity formed by the interconnection of the housing and the base, spaced apart from the formation sample 110. This provides physical protection for the stable operation of the vibration receiving sensor 211 and the memory 212, preventing the formation sample 110 from interfering with or damaging the vibration receiving sensor 211 and the memory 212 under cyclic dynamic loads, and from affecting the judgment of the control unit 400 on the bottom characteristics of the formation sample 110.

[0051] It should be noted that the more receivers 210 are set up, the more effective parameter information on the formation characteristics of the formation sample 110 will be obtained, but this will also increase the difficulty of processing the parameter information. Furthermore, due to the size of the receivers 210, burying multiple receivers 210 within the formation sample 110 will damage the structural integrity of the formation sample 110, leading to distorted test results. Therefore, the number of receivers 210 should not be too large; slightly greater than or equal to the number of vibrators 310 is sufficient. For example, in this embodiment, the vibration unit 300 consists of four vibrators 310, and the receiving unit 200 consists of four receivers 210.

[0052] In one embodiment, the control unit 400 includes a controller and a computer. The controller is communicatively connected to the vibration unit 300 and is used to control the output parameters of the cyclic dynamic load output by the vibration unit 300. The computer is communicatively connected to the controller and the receiving unit 200 and is used for the drive control of the entire test apparatus, the recording and processing of test data.

[0053] The drive control of the entire test device is achieved by using a controller to control the vibration motor 311 inside the vibrator 310, so as to provide the driving force for vibration of the vibrator 310, and at the same time, to control the output parameters of the cyclic dynamic load output by the vibration unit 300 according to the target vibration conditions.

[0054] The electronic computer, through its communication connection with the controller, is used not only to drive and control the entire test apparatus, but also to acquire the output parameters of the cyclic dynamic load from the vibration unit 300. Furthermore, the electronic computer, through its communication connection with the receiving unit 200 (i.e., the memory 212), acquires the received parameters of the cyclic dynamic load stored within the memory.

[0055] Furthermore, by utilizing the big data analysis and computing capabilities of electronic computers, it is possible to establish output parameters of the cyclic dynamic load based on the output of the vibration unit 300 and the receiving parameters of the cyclic dynamic load based on the output of the receiving unit 200, even with large amounts of data, diverse data types, and numerous natural variables. This allows for the calculation of the attenuation of the stratum sample 110 under the cyclic dynamic load and the establishment of a database of the quantitative relationship between the attenuation and stratum characteristics. This satisfies the quantitative characterization of the attenuation of the stratum sample 110 under the cyclic dynamic load and the changes in stratum characteristics, providing a reference for traffic flow control in the superstructure corresponding to the underground space, construction intensity constraints of surrounding projects, and rail transit construction.

[0056] In one embodiment, a crossbeam 120 is also provided at the bottom of the model box 100. The crossbeam 120 passes through the bottom opening of the model box 100, providing bottom support for the formation sample 110 to be filled in the internal cavity of the model box 100, thereby improving the stability of the formation sample 110 in the model box 100.

[0057] Secondly, this application also provides a method for simulating formation characteristics under cyclic dynamic loading, such as... Figure 1 and Figure 4 As shown, this test method uses the formation characteristic simulation test device under cyclic dynamic loading described in any of the above embodiments, and specifically includes the following steps:

[0058] First, in step S1, a model box 100 containing a formation sample 110 is provided, and a receiving unit 200 is pre-embedded in a preset position within the formation sample 110 to collect cyclic dynamic load data of the formation sample 110 located around the receiving unit 200 and output the receiving parameters of the cyclic dynamic load.

[0059] Then, proceed to step S2, where a vibration unit 300 is installed on the top of the model box 100, and the vibration unit 300 simulates the output of cyclic dynamic load to the formation sample 110 until the formation sample 110 inside the model box 100 experiences a fault or collapse.

[0060] Finally, in step S3, the control unit 400 outputs a quantitative relationship between the attenuation of the formation sample 110 to the cyclic dynamic load and the formation characteristics of the formation sample 110, based on the output parameters of the cyclic dynamic load output by the vibration unit 300 and the receiving parameters of the cyclic dynamic load output by the receiving unit 200.

[0061] The vibration unit 300 simulates the actual working conditions of the target area, continuously outputting cyclic dynamic load to the formation sample 110. The receiving unit 200, embedded in the formation sample 110, collects the vibration waveform parameters of the cyclic dynamic load around its periphery. The control unit 400 then calculates the attenuation of the cyclic dynamic load on the formation sample 110 based on the received parameters from the receiving unit 200 and the output parameters from the vibration unit 300, and characterizes the formation characteristics of the formation sample 110 based on this attenuation. The working principle has been explained above and will not be repeated here.

[0062] In one embodiment, before the step of setting the vibration unit 300 on the top of the model box 100, the following step is further included:

[0063] S21, Perform actual measurements on the cyclic dynamic load level of the target area to obtain the measured data of the cyclic dynamic load in the target area;

[0064] S22, the measured data are statistically analyzed and processed to simulate and calculate the position distribution and vibration conditions of the vibration unit 300 on the top of the model box 100.

[0065] Considering the differences in geological characteristics across different regions, before placing the vibration unit 300 on top of the model box 100, the actual level of the measured cyclic dynamic load in the target area is statistically analyzed and processed to serve as the vibration condition input to the vibration unit 300. The required number and distribution of vibrators are then calculated. Only by rationally arranging the number and position of the vibrators 310 on the geological sample 110 can the cyclic dynamic load simulated by the vibration unit 300 be made to match the actual geological conditions of the target area to the greatest extent possible, thus ensuring the accuracy of the cyclic dynamic load simulated by the vibration unit 300.

[0066] In summary, this application provides a test apparatus and method for simulating formation characteristics under cyclic dynamic load. The test apparatus includes a model box 100, a vibration unit 300, a receiving unit 200, and a control unit 400. The vibration unit 300 is mounted on the model box 100, the receiving unit 200 is embedded in the formation sample 110, and the control unit 400 is communicatively connected to the vibration unit 300 and the receiving unit 200. The vibration unit 300 outputs cyclic dynamic load to the formation sample 110, and the receiving unit 200 receives and collects parameters of the cyclic dynamic load transmitted by the formation sample 110. The control unit 400 calculates the attenuation of the formation sample 110 under the cyclic dynamic load using the output parameters of the vibration unit 300 and the collected parameters of the receiving unit 200. Based on the attenuation of the formation sample 110 under the cyclic dynamic load, the formation characteristics of the formation sample 110 are quantitatively characterized, providing a quantitative basis for underground space safety early warning.

[0067] The collection, storage, use, processing, transmission, provision, and disclosure of user personal information involved in this application all comply with the provisions of relevant laws and regulations and do not violate public order and good morals.

[0068] It should be noted that personal information collected from users should be used for legitimate and reasonable purposes and should not be shared or sold outside of these legitimate uses. Furthermore, such collection / sharing should only be conducted after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign an agreement / authorization that includes authorization of relevant user information before the user uses the function. In addition, any necessary steps must be taken to protect and safeguard access to such personal information data and ensure that others with access to personal information data comply with their privacy policies and procedures.

[0069] In the foregoing descriptions of the embodiments, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0070] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

Claims

1. A method for simulating formation characteristics under cyclic dynamic loading, comprising using a cyclic dynamic loading formation characteristic simulation test apparatus, characterized in that, The formation characteristic simulation test device under cyclic dynamic loading includes: A model box, wherein the bottom of the model box has an opening, the opening extends from the bottom of the model box to the top to form a cavity, and the cavity is filled with a formation sample; A vibration unit is installed on the upper part of the model box and simulates cyclic dynamic load to the formation sample. The vibration unit consists of multiple dispersed vibrators. The multiple vibrators work together to simulate cyclic dynamic load to the formation sample. Each vibrator includes a vibration motor and an eccentric wheel connected to each other. The eccentric wheel generates periodic vibration under the drive of the vibration motor. By controlling the vibration waveform parameters generated by each vibrator, different cyclic dynamic loads with different vibration patterns are generated. A receiving unit is disposed inside the formation sample and is used to collect cyclic dynamic loads of the surrounding formation sample and output the received parameters of the cyclic dynamic loads. The control unit is communicatively connected to the vibration unit and the receiving unit, and is used to control the output parameters of the cyclic dynamic load output by the vibration unit and receive the received parameters of the cyclic dynamic load output by the receiving unit; the control unit is configured to output the attenuation amount of the formation sample to the cyclic dynamic load and the quantitative characterization of the formation characteristics of the formation sample based on the output parameters and received parameters of the cyclic dynamic load. The method for simulating formation characteristics under cyclic dynamic loading includes: The model box containing the formation sample is provided, and the receiving unit is pre-embedded in a preset position within the formation sample to collect cyclic dynamic load data of the surrounding formation sample and output the receiving parameters of the cyclic dynamic load. A vibration unit is installed on the top of the model box to simulate the output of cyclic dynamic load to the formation sample until the formation sample undergoes a fault or collapse within the model box. Based on the output parameters of the cyclic dynamic load output by the vibration unit and the received parameters of the cyclic dynamic load output by the receiving unit, the control unit outputs a quantitative relationship between the attenuation of the formation sample to the cyclic dynamic load and the formation characteristics of the formation sample.

2. The test method according to claim 1, characterized in that, The receiving unit consists of multiple diffusely distributed receivers to receive and collect parameters from cyclic dynamic loads at different locations of the formation sample.

3. The test method according to claim 2, characterized in that, The receiver includes a vibration receiving sensor and a memory. The vibration receiving sensor is used to receive cyclic dynamic loads transmitted from the formation sample, and the memory is used to store the parameters of the cyclic dynamic loads collected by the vibration receiving sensor.

4. The test method according to claim 3, characterized in that, The receiver also includes a housing and a base. The vibration receiving sensor and the memory are jointly disposed on the base and located in a sealed cavity formed by the interconnection of the housing and the base, and are spaced apart from the formation sample.

5. The test method according to claim 1, characterized in that, The bottom of the model box is also provided with a crossbeam that passes through the opening, providing bottom support for the formation sample to fill the cavity.

6. The test method according to claim 1, characterized in that, The control unit includes: The controller is communicatively connected to the vibration unit and is used to control the output parameters of the cyclic dynamic load output by the vibration unit. An electronic computer is communicatively connected to the controller and the receiving unit for driving control of the test device, recording and processing of test data.

7. The test method according to claim 1, characterized in that, Before the step of installing the vibration unit on the top of the model box, the method further includes: The cyclic dynamic load level of the target area was measured to obtain the measured data of the cyclic dynamic load in the target area; The measured data are statistically analyzed and processed to simulate and calculate the positional distribution and vibration conditions of the vibration unit at the top of the model box.

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