A test system for nuclear reactor component resistance to vibration

Abstract

The application relates to a test system for the vibration resistance of a nuclear reactor component, which comprises a supporting module, a test module, a vibration exciting module and a data processing module, the test module is in sliding connection with the supporting module, the vibration exciting module is fixed to one side of the supporting module, the data processing module is connected with the test module, the vibration exciting module is used for generating exciting force in the supporting module according to test parameters, so that the test module in sliding connection with the supporting module enters a vibration state; the data processing module is used for collecting multiple test signals of the test module after entering the vibration state, and analyzing the test signals to obtain the structural response of the test module. The application utilizes the vibration exciting module to generate the exciting force to make the test module vibrate. The data processing module collects multiple test signals of the test module after entering the vibration state, and analyzes the test signals to obtain the structural response of the test module, so that automatic vibration resistance test of the test module is realized, and the obtained structural response is beneficial to improving the nuclear reactor component.

Description

Technical Field

[0001] This application relates to the field of vibration testing technology, and more particularly to a test system for the vibration resistance of nuclear reactor components. Background Technology

[0002] In a fast neutron nuclear reactor, hundreds of components (including fuel rod assemblies, shielding assemblies, control rod assemblies, etc.) are densely packed on a grid. During operation, the components release a large amount of nuclear energy due to nuclear reactions, heating the surrounding cooling medium. The cooling medium circulates under the drive of a circulating pump, thus gaining thermal energy.

[0003] The vibrations generated during the operation of the circulating pump are transmitted to the reactor assemblies. To ensure the safety of the nuclear reactor during long-term operation, vibration resistance tests are required for the assemblies. However, vibration resistance tests need to take into account the environmental characteristics of the assemblies in a real-world environment, such as the influence of the fluid environment (fluid density, fluid gaps, etc.) on the dynamic characteristics of the structure. Therefore, there is no complete solution for automatically conducting vibration resistance tests on each assembly. Summary of the Invention

[0004] To solve the above-mentioned technical problems, or at least partially solve them, this application provides a test system for the vibration resistance of nuclear reactor components.

[0005] This application provides a test system for the vibration resistance of nuclear reactor components, including:

[0006] The system includes a support module, a test module, a vibration module, and a data processing module. The test module is slidably connected to the support module, the vibration module is fixed to one side of the support module, and the data processing module is connected to the test module. The test module includes multiple nuclear reactor components.

[0007] The excitation module is used to generate an excitation force in the support module according to the test parameters, so as to cause the test module, which is slidably connected to the support module, to enter a vibration state.

[0008] The data processing module is used to collect multiple test signals after the test module enters the vibration state, and analyze the test signals to obtain the structural response of the test module. The structural response includes at least the structural dynamic characteristics of the test module and the influence law of vibration on structural deformation.

[0009] In one possible implementation, the excitation module includes: a signal output device, a power amplifier, and an excitation device;

[0010] The signal output device is used to generate an excitation control signal according to the test parameters, and output the excitation control signal to the power amplifier. The power amplifier converts the excitation control signal into voltage and current and then outputs it to the excitation device.

[0011] The excitation device is used to generate an excitation force in the support module according to the voltage and current, so as to cause the test module, which is slidably connected to the support module, to enter a vibration state.

[0012] In one possible implementation, the support module includes: a support base, one end of which is provided with a groove, and first support platforms are symmetrically arranged on both sides of the groove. The first support platforms are provided with slide rails, and the test module is connected to the test module through the slide rails. The groove is used to protect the test module in a vibration state.

[0013] A second support platform is provided at the other end of the support base, which is used to fix the excitation device in the excitation module.

[0014] In one possible implementation, the first support platform and the second support platform are arranged in parallel, and the parallel height between the first support platform and the second support platform is not higher than 0.08 mm.

[0015] In one possible implementation, the support base is provided with multiple reinforcing ribs, which are used to make the first-order natural frequency of the support base higher than 200Hz.

[0016] In one possible implementation, the test module includes: a test chamber and a stabilization mechanism. The test chamber is cylindrical and includes multiple sequentially connected test compartments, with each test compartment connected by a flange.

[0017] The stabilizing mechanism includes a mounting plate disposed in the middle of the test chamber. The first surface of the mounting plate is provided with four main reinforcing ribs, and the second surface of the mounting plate is provided with four auxiliary reinforcing ribs. The main reinforcing ribs and the auxiliary reinforcing ribs are symmetrical.

[0018] In one possible implementation, the surfaces of the individual experimental compartments of the test chamber are coated with an anti-rust coating.

[0019] In one possible implementation, the data processing module includes: a controller and a computing device;

[0020] The controller is used to acquire the target acceleration signal on the closed loop of the experimental system and the strain signal of the key component of the test module in the test module, and transmit the target acceleration signal and the strain signal to the computing device. The target acceleration signal includes: the first acceleration signal of the flange in the test module and the second acceleration signal of the key component of the test module.

[0021] The computing device is used to analyze the target acceleration signal and strain signal to obtain the structural response of the test module.

[0022] The testing system provided in this application utilizes a vibration module to generate excitation force according to test parameters, causing the test module, which is slidably connected to the support module, to vibrate. A data processing module collects multiple test signals from the test module after it enters the vibration state and analyzes these signals to obtain the structural response of the test module. This enables automated vibration resistance testing of the test module, and the obtained structural response is beneficial for improving nuclear reactor components. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of a test system for the vibration resistance of nuclear reactor components provided in this application embodiment;

[0026] Figure 2 A schematic diagram of the excitation module provided in an embodiment of this application;

[0027] Figure 3 A partial schematic diagram of the support module provided in the embodiments of this application;

[0028] Figure 4 A partial schematic diagram of the support module provided in the embodiments of this application;

[0029] Figure 5 A partial schematic diagram of the support module provided in the embodiments of this application;

[0030] Figure 6 A schematic diagram of the test module provided in an embodiment of this application;

[0031] Figure 7 A schematic diagram of the connection of the test module provided in the embodiments of this application;

[0032] Figure 8 This is a schematic diagram of the data processing module provided in an embodiment of this application. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical methods in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0034] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0035] This application provides a testing system for the vibration resistance of nuclear reactor components. Figure 1 A schematic diagram of a test system for the vibration resistance of nuclear reactor components provided in this application embodiment is shown below. Figure 1 As shown, the test system includes:

[0036] The test module 20, the excitation module 30, and the data processing module 40 are provided. The test module 20 is slidably connected to the support module 10. The excitation module 30 is fixed to one side of the support module 10. The data processing module 40 is connected to the test module 20. The test module 20 includes one or more nuclear reactor components.

[0037] In this embodiment, the excitation module 30 is used to generate an excitation force in the support module according to the test parameters, so that the test module, which is slidably connected to the support module, enters a vibration state.

[0038] In this embodiment of the application, the data processing module 40 is used to collect multiple test signals of the test module 20 after it enters the vibration state, and analyze the test signals to obtain the structural response of the test module. The structural response includes at least the structural dynamic characteristics of the test module and the influence law of vibration on structural deformation.

[0039] In the embodiments of this application, such as Figure 2 As shown, the excitation module 30 includes: a signal output device 301, a power amplifier 302, and an excitation device 303.

[0040] The signal output device 301 is used to generate an excitation control signal according to the test parameters and output the excitation control signal to the power amplifier 302. The power amplifier 303 converts the excitation control signal into voltage and current and outputs it to the excitation device.

[0041] The excitation device 303 is used to generate an excitation force in the support module according to the voltage and current, so as to put the test module, which is slidably connected to the support module, into a vibration state.

[0042] In this embodiment, the signal output device 301 obtains experimental parameters from the test information uploaded by the user, generates an excitation control signal based on the test parameters, and then outputs the excitation control signal to a power amplifier for signal conversion. The signal output device can be a controller in the data processing module. The test information includes the test mode and test parameters. The test mode can be a constant displacement frequency sweep test or a long-term vibration resistance test with multiple feature points under constant displacement conditions. The test parameters include vibration intensity, vibration time, etc.

[0043] In this embodiment, the excitation device 303 can be a vibrator. After receiving the voltage and current input from the power amplifier 302, the excitation device 303 will enter the working mode and generate an excitation force in the support module. The generated excitation force will be used to make the test module slidably connected to the support module enter the vibration state.

[0044] In the embodiments of this application, such as Figures 3 to 5 As shown, the support module 10 includes: a support base 101, with a groove 102 at one end of the support base 101, and first support platforms 104 symmetrically arranged on both sides of the groove 102. Each first support platform 104 is equipped with a slide rail 103, and is connected to the test module via the slide rail 103. The groove 102 is used to protect the test module under vibration. The support base 101 has multiple reinforcing ribs inside, which ensure that the first natural frequency of the support base is higher than 200 Hz.

[0045] It should be noted that, in order to improve the rigidity of the support base, the base must first be stabilized. This includes measures such as adding reinforced steel structures and laying pebbles or cement mixtures. Additionally, grooves of a certain depth are incorporated into the support base to provide both experimental space and disaster prevention capabilities, such as protection in the event of a material leak.

[0046] In this embodiment of the application, a second support platform 105 is provided at the other end of the support base. The second support platform 105 is used to fix the excitation device 303 in the excitation module.

[0047] In this embodiment, the first support platform 104 and the second support platform 105 are arranged in parallel, and the parallel height between the first support platform 104 and the second support platform 105 is no higher than 0.08 mm. It should be noted that the purpose of the parallel height being no higher than 0.08 mm is to ensure the parallelism of the thrust / slide direction.

[0048] In the embodiments of this application, such as Figure 6 As shown, the test module 20 includes a test chamber 201 and a stabilizing mechanism. The test chamber 201 is cylindrical and includes multiple test sub-chambers 202 connected in sequence. Each test sub-chamber 202 is connected to the other by a flange 203.

[0049] In this embodiment, the test chamber is generally about 4m to 4.5m high. For some small fast neutron reactor components (components are generally about 2m high), the chamber can be designed to be 2.5m to 3m high. Depending on the specific circumstances, the test chamber can be divided into test compartments of 500mm to 600mm. The test compartments are connected by flanges. In addition, considering the fluid environment during the test (generally water is used as the fluid medium, encapsulated inside the test chamber), the flanges between the test compartments need to be sealed.

[0050] In this embodiment, the stabilizing mechanism includes a mounting plate 204 disposed in the middle of the test chamber. The first surface of the mounting plate 204 is provided with four main reinforcing ribs 205 and four auxiliary reinforcing ribs 206, and the second surface of the mounting plate is provided with four main reinforcing ribs 205 and four auxiliary reinforcing ribs 206. The upper and lower reinforcing ribs are arranged in a symmetrical structure.

[0051] In this embodiment, the surfaces of each experimental compartment of the test chamber are coated with an anti-rust coating. The anti-rust coating can be applied by means of chrome plating or anti-rust paint, etc.

[0052] It should be noted that the test chamber and the slide are connected by a main flange, which serves to transfer the load. For example... Figure 7 As shown, to improve the rigidity of the tooling, four main reinforcing ribs and four auxiliary reinforcing ribs are required in the upper and lower parts respectively. To ensure long-term operational reliability, all bolt connections are loosened, for example, by using high-strength threadlocker or lock nuts.

[0053] In the embodiments of this application, such as Figure 8 As shown, the data processing module 40 includes a controller 401 and a computing device 402.

[0054] In this embodiment of the application, the controller 401 is used to acquire the target acceleration signal on the closed loop of the experimental system and the strain signal of the key component of the test module in the test module, and transmit the target acceleration signal and the strain signal to the computing device. The target acceleration signal includes: the first acceleration signal of the flange in the test module and the second acceleration signal of the key component of the test module.

[0055] The computing device 402 is used to analyze the target acceleration signal and strain signal to obtain the structural response of the test module.

[0056] It should be noted that key components of the test module can be flanges, main stiffeners, auxiliary stiffeners, etc. Specifically, the first acceleration signal from the flange in the test module is used for exciter feedback control, and its measurement is obtained using an accelerometer with a range of 10G or less, with a sampling frequency of no less than 2000Hz. The strain signals and second acceleration signals from the key components of the test module are used for structural response analysis. The strain signal can be measured using fiber optics or strain gauges, with a frequency of no less than 10000Hz to ensure the accuracy of the subsequent structural response. Finally, the computing equipment compares and analyzes the input and output signals to obtain the required test results, such as the structural dynamics of the component and the influence of long-term vibration on structural deformation.

[0057] The testing system provided in this application utilizes a vibration module to generate excitation force according to test parameters, causing the test module, which is slidably connected to the support module, to vibrate. A data processing module collects multiple test signals from the test module after it enters the vibration state and analyzes these signals to obtain the structural response of the test module. This enables automated vibration resistance testing of the test module, and the obtained structural response is beneficial for improving nuclear reactor components.

[0058] The specific embodiments of the invention have been described in detail above. However, as examples, the invention is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications or substitutions to the invention are also within the scope of the invention. Therefore, all equivalent transformations, modifications, and improvements made without departing from the spirit and principles of the invention should be covered within the scope of the invention.

Claims

1. A testing system for the vibration resistance of nuclear reactor components, characterized in that, include: The system includes a support module, a test module, a vibration module, and a data processing module. The test module is slidably connected to the support module, the vibration module is fixed to one side of the support module, and the data processing module is connected to the test module. The test module includes multiple nuclear reactor components. The excitation module is used to generate an excitation force in the support module according to the test parameters, so as to cause the test module, which is slidably connected to the support module, to enter a vibration state. The data processing module is used to collect multiple test signals after the test module enters the vibration state, and analyze the test signals to obtain the structural response of the test module. The structural response includes at least the structural dynamic characteristics of the test module and the influence law of vibration on structural deformation. The support module includes: a support base, one end of which is provided with a groove, and first support platforms are symmetrically arranged on both sides of the groove. The first support platforms are provided with slide rails, and the test module is connected through the first support platforms and the slide rails. The groove is used to protect the test module in the vibration state. A second support platform is provided at the other end of the support base, and the second support platform is used to fix the excitation device in the excitation module. The first support platform and the second support platform are arranged in parallel, and the parallel height between the first support platform and the second support platform is not higher than 0.08mm; The support base is provided with multiple reinforcing ribs, which make the first natural frequency of the support base higher than 200Hz.

2. The system according to claim 1, characterized in that, The excitation module includes: a signal output device, a power amplifier, and an excitation device; The signal output device is used to generate an excitation control signal according to the test parameters, and output the excitation control signal to the power amplifier. The power amplifier converts the excitation control signal into voltage and current and then outputs it to the excitation device. The excitation device is used to generate an excitation force in the support module according to the voltage and current, so as to cause the test module, which is slidably connected to the support module, to enter a vibration state.

3. The system according to claim 1, characterized in that, The test module includes: a test chamber and a stabilization mechanism. The test chamber is cylindrical and includes multiple test sub-compartments connected in sequence. Each test sub-compartment is connected by a flange. The stabilizing mechanism includes a mounting plate disposed in the middle of the test chamber. The first surface of the mounting plate is provided with four main reinforcing ribs, and the second surface of the mounting plate is provided with four auxiliary reinforcing ribs. The main reinforcing ribs and the auxiliary reinforcing ribs are symmetrical.

4. The system according to claim 3, characterized in that, The surfaces of each experimental compartment of the test chamber are coated with an anti-rust coating.

5. The system according to claim 1, characterized in that, The data processing module includes: a controller and a computing device; The controller is used to acquire the target acceleration signal on the closed loop of the experimental system and the strain signal of the key component of the test module in the test module, and transmit the target acceleration signal and the strain signal to the computing device. The target acceleration signal includes: the first acceleration signal of the flange in the test module and the second acceleration signal of the key component of the test module. The computing device is used to analyze the target acceleration signal and strain signal to obtain the structural response of the test module.

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