CN117054267A - Test device and method for measuring liquid impact load at top of water storage tank of nuclear power plant - Google Patents
Test device and method for measuring liquid impact load at top of water storage tank of nuclear power plant Download PDFInfo
- Publication number
- CN117054267A CN117054267A CN202311021917.5A CN202311021917A CN117054267A CN 117054267 A CN117054267 A CN 117054267A CN 202311021917 A CN202311021917 A CN 202311021917A CN 117054267 A CN117054267 A CN 117054267A
- Authority
- CN
- China
- Prior art keywords
- impact
- top plate
- model
- water
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 119
- 239000007788 liquid Substances 0.000 title claims abstract description 75
- 238000012360 testing method Methods 0.000 title claims description 59
- 238000000034 method Methods 0.000 title claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 17
- 239000010935 stainless steel Substances 0.000 claims abstract description 17
- 230000005284 excitation Effects 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 7
- 238000004364 calculation method Methods 0.000 description 5
- 238000010998 test method Methods 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
- 239000000941 radioactive substance Substances 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 238000007405 data analysis Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000012857 radioactive material Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002915 spent fuel radioactive waste Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/003—Remote inspection of vessels, e.g. pressure vessels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/001—Mechanical simulators
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- High Energy & Nuclear Physics (AREA)
- Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Plasma & Fusion (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The device comprises a scaling water tank model, a single-axis hydraulic vibrating table, a hydraulic pressure strong sensor, a force sensor and a high-speed camera, wherein the bottom of the scaling water tank model is fixed on the single-axis hydraulic vibrating table, and a through hole is formed in the side wall of the scaling water tank model for fixing a built-in impact top plate; the lower part of the force sensor is fixed on the built-in impact top plate, the upper part of the force sensor is fixed on an L-shaped stainless steel bracket, and the L-shaped stainless steel bracket is fixed on the side wall of the water tank model through a transverse bolt; the hydraulic pressure Jiang Chuangan device is mounted on the built-in impact top plate. The invention can accurately measure the impact load of liquid shaking on the top plate of the water tank; the arrangement of the roof protrusions can be changed as desired; the distribution of the top impact load can be measured; has stronger economy.
Description
Technical Field
The invention belongs to the technical field of nuclear power energy, and particularly relates to a test device and a test method for measuring liquid impact load at the top of a water storage tank of a nuclear power plant.
Background
The water storage tank in the nuclear power plant is a key device in the nuclear energy field, has a plurality of important functions to ensure the safe and stable operation of the nuclear power plant and cope with emergency situations (such as a passive containment cooling water tank, a spent fuel pool, an auxiliary water tank and the like). These tanks play an indispensable role in the safety system and daily operations of nuclear power plants, covering a number of key aspects of cooling, pressure control, radioactive substance control, etc. First, the storage tank plays a critical role in the cooling system in a nuclear power plant. Stable operation of a nuclear reactor requires maintaining a suitable temperature range to prevent overheating and fuel damage. The water storage tank, as part of a cooling system, stores a coolant, typically water, to provide a cooling effect when needed to maintain a steady operating temperature of the nuclear reactor. Its cooling function is critical to the normal operation of the nuclear power plant. The water storage tank is also of great significance in emergency response of nuclear power plants. These tanks can play a critical role in the event of accidents or emergencies in the nuclear power plant. For example, they may be used to absorb coolant, relieve pressure, help control the development of events, and prevent further deterioration of the incident. Such emergency response capability is critical to the handling of emergency situations, maintaining the safety and stability of the nuclear power plant. In addition, the water storage tank plays an important role in controlling radioactive substances. The radioactive materials produced by nuclear power plants need to be effectively controlled and managed to prevent radiation exposure to the environment and personnel. The water storage tank is used for collecting, storing and treating the wastewater containing radioactive substances, ensuring that the wastewater cannot leak into the environment, and accordingly maintaining the safety of the surrounding environment of the nuclear power station. The water storage tank can also be used as a part of a standby water supply system to ensure that enough coolant or fire water can be obtained by the nuclear power station under emergency conditions, and the operation of key equipment is maintained. In addition, they also help to maintain the operational stability of the nuclear power plant, avoid problems of temperature rise, pressure increase, etc., thereby ensuring the normal operation of the equipment.
Under earthquake conditions, liquid in the water storage tank of the nuclear power plant can shake. When the frequency of external excitation approaches to the shaking frequency of the liquid, the liquid in the water tank resonates, a large shaking phenomenon can occur, and the top of the water tank can be damaged. Nuclear power plants are often required to maintain the safety and stability of equipment under various conditions to ensure proper operation of the nuclear reaction. Liquid impact can interfere with the normal operation of the nuclear power plant and can even lead to equipment failure or radioactive material leakage, thereby increasing the risk of accidents. The related research on the impact load of the liquid at home and abroad is relatively deficient. In addition, in new nuclear power plants, some passive safety tanks have a large span, and reinforcing beams are arranged on the top of the tank in order to reinforce the structural rigidity thereof. Such reinforcement beams are partially submerged in water, and the effect of the top-contained protrusions (beams) on the impact load of the liquid is currently unknown.
In the prior art, a study of shaking characteristics of an AP1000 containment cooling water tank under a long-period earthquake is disclosed (nuclear power engineering, volume 36, 5, zeng Xiaojia and the like in 10 months in 2015), an experimental model is built in the literature, sine three waves consistent with the shaking frequency of water are selected as excitation through a shaking table simulation experiment, the impact force of each position of a top cover at different liquid depths is measured, and the feasibility and the accuracy of the calculation method are further proved by comparison with a calculation method proposed by Liu Daogang. Meanwhile, the calculation result is relatively smaller when the small amplitude shakes, and relatively larger when the large amplitude shakes, so that the method has certain conservation. However, this prior art cannot accurately measure the impact load of liquid sloshing to the top plate of the tank, cannot change the arrangement of the protruding top plate as required, and cannot measure the distribution of the top impact load.
Disclosure of Invention
The invention aims to provide a test device and a method for measuring the impact load of liquid at the top of a water tank of a nuclear power plant, which can measure the impact load of the liquid on the whole top of the water tank caused by liquid shaking, can determine the distribution condition of the impact load of the liquid, and can explore the influence of a protrusion (beam) at the top of the water tank on the impact load of the liquid.
The utility model provides a test device of nuclear power plant's storage water tank top liquid impact load, includes scale water tank model, unipolar fluid pressure type shaking table, water pressure strong sensor, force transducer, characterized by: the bottom of the scaled water tank model (1) is fixed on a single-axial hydraulic vibrating table (11), and a through hole (10) is formed in the side wall for fixing the built-in impact top plate (5); the lower part of the force sensor (4) is fixed on a built-in impact top plate (5), the upper part of the force sensor is fixed on an L-shaped stainless steel bracket (3), and the L-shaped stainless steel bracket is fixed on the side wall of the water tank model through a transverse bolt (2); the water pressure Jiang Chuangan device is arranged on the built-in impact top plate;
in the test process, excitation is applied to the scaled water tank model (1) through the uniaxial hydraulic vibration table (11), liquid in the water tank shakes, so that the liquid impacts the built-in top plate, a time course curve of the impact force of the liquid is measured through the force sensor, and the distribution condition of the impact pressure of the liquid on the top plate is measured through the water pressure intensity sensor.
The invention also discloses a test method for the liquid impact load at the top of the water storage tank of the nuclear power plant by adopting the experimental device, which is characterized in that:
1) The method comprises the steps of installing a nuclear power plant water storage tank scaling test model on a table top of a single-axis hydraulic vibration table, and fixedly connecting the bottom of the model with the vibration table top by bolts;
2) Installing a water pressure strong sensor on the side wall of the model;
3) Injecting water into the water tank model to enable the water level to meet the test requirement;
4) If necessary, fixing the top protrusion to the built-in impact top plate by bolts;
5) Mounting a force sensor and a pressure sensor to a built-in impact top plate;
6) The built-in impact top plate is fixed on the side wall of the water tank model through an L-shaped stainless steel bracket and a transverse bolt;
7) Fixing a waterproof wide-angle high-speed camera on the side wall of the top of the model through a sucker;
8) Opening a control system and a water cooling system of the vibrating table, and setting vibration parameters;
9) Connecting the sensor with a data acquisition system, and opening the relevant sensor;
10 Opening a data acquisition instrument and setting acquisition parameters;
11 Beginning the test, applying external vibration excitation to the model, and recording the force of each measuring point
Time course curves of the sensor and the water pressure sensor;
12 After the liquid is calm, repeating the content of the step 11, repeating the test for 3 times, and taking the average value of the 3 tests as the final measurement result to reduce the random error.
13 All the water in the model was drained and other settings were kept consistent with steps 9 and 10 (as a control group, the effect of external excitation on the model was excluded);
14 Repeating step 11 once and recording test data.
Advantageous effects
1) The impact load of liquid shaking on the top plate of the water tank can be accurately measured;
2) The arrangement of the roof protrusions can be changed as desired;
3) The distribution of the top impact load can be measured;
4) Has stronger economy.
Drawings
FIG. 1 is a schematic diagram of a test apparatus for the top liquid impact load of a water storage tank of a nuclear power plant;
FIG. 2 is a schematic view of a built-in impact roof;
FIG. 3 is a schematic diagram of a data acquisition device according to the present invention;
FIG. 4 is a computational domain of experimental model potential functions, where (a) is a computational domain perspective; (b) is a calculated domain top view;
FIG. 5 is an external excitation acceleration time course curve of an embodiment;
FIG. 6 is a plot of the total force versus time for a roof liquid impact load;
FIG. 7 is a plot of the pressure profile of a roof liquid impact load;
wherein: 1-scaling water storage tank model, 2-transverse fixing bolts, 3-L-shaped stainless steel bracket, 4-force sensor, 5-built-in impact top plate, 6-top plate water pressure sensor, 7-top protrusion model, 8-protrusion longitudinal fixing bolts, 9-side wall water pressure sensor, 10-top plate transverse fixing holes, 11-single axial hydraulic vibration table and 12-waterproof wide-angle high-speed camera; 13-force sensor fixing bolt holes, 14-top protrusion fixing bolt holes (oblique), 15-connecting holes of a stainless steel frame and an acrylic body, 16-top protrusion fixing bolt holes (forward), 17-top plate water pressure sensor holes, 18-stainless steel frames and 19-acrylic body; 20-strain data conditioner, 21-data acquisition instrument.
Detailed Description
Example 1
The invention relates to a test device for researching the impact load of liquid at the top of a water storage tank of a nuclear power plant, which mainly comprises the following components:
1) The scale model is used for simulating a water storage tank of a nuclear power plant, and the bottom of the scale model is fixed on a single-axis hydraulic vibrating table;
2) The uniaxial hydraulic vibration test system is used for providing external excitation required by a test;
3) Six force sensors are fixed on the built-in impact top plate;
4) Six hydraulic pressure strong sensors are installed on the built-in impact top plate.
The main structure of the test device is shown in figure 1. The bottom of the scaled water tank model (1) is fixed on a single-axial hydraulic vibrating table (11) by bolts, and a top plate transverse fixing hole (10) with phi 10 is formed in the side wall of the scaled water tank model and is used for fixing a built-in impact top plate. The built-in impact top plate (5) consists of two parts, namely a stainless steel frame (18) and an acrylic (organic glass) body (19), which are fixedly connected through bolts. The lower part of the force sensor (4) is fixed on a bolt hole on the built-in impact top plate (5), and the upper part is fixed on the L-shaped stainless steel bracket (3) through bolts. The L-shaped stainless steel bracket is fixed on the side wall of the water tank model through a transverse fixing bolt (2). The roof water pressure sensor (6) is arranged in a hole site (17) reserved by the built-in impact roof in a threaded connection mode. The sidewall water pressure sensor (9) is also mounted on the mold sidewall by threads. In addition, the top protrusion model (7) is fixed on the built-in impact top plate through a protrusion longitudinal fixing bolt (8) (whether the top protrusion is installed or not can be determined according to test requirements).
In the test process, excitation is applied to the water storage tank model through the uniaxial hydraulic vibrating table, liquid in the water tank shakes, so that the liquid impacts the built-in top plate, a time course curve of fluid impact force can be measured through six force sensors, and the distribution condition of liquid impact pressure on the top plate can be measured through six hydraulic pressure sensors. The distribution of the impact surface when the liquid impacts the top plate can also be recorded by a wide-angle high-speed camera (12).
The force sensor 4 is connected with the strain data conditioner 20 through a cable, and the strain data conditioner 20 is connected with the data acquisition instrument 21 through a cable. During the test, the force sensor 4 converts the impact load of the liquid into an electric signal through the strain data conditioner 20 and amplifies the electric signal, and the data acquisition instrument 21 acquires and records the processed electric signal. The top plate water pressure sensor 6 directly converts the liquid impact pressure into an electric signal, and the data acquisition instrument 21 acquires and records the electric signal. The data acquisition instrument 21 can transmit the acquired and recorded signals to a data analysis computer so as to aggregate the data for further analysis.
Example 2
The test method for researching the liquid impact load at the top of the water storage tank of the nuclear power plant comprises the following steps:
1) The method comprises the steps of installing a nuclear power plant water storage tank scaling test model on a table top of a single-axis hydraulic vibration table, and fixedly connecting the bottom of the model with the vibration table top by bolts;
2) Installing a water pressure strong sensor on the side wall of the model;
3) Injecting water into the water tank model to enable the water level to meet the test requirement;
4) If necessary, fixing the top protrusion to the built-in impact top plate by bolts;
5) Mounting a force sensor and a pressure sensor to a built-in impact top plate;
6) The built-in impact top plate is fixed on the side wall of the water tank model through an L-shaped stainless steel bracket and a transverse bolt;
7) Fixing a waterproof wide-angle high-speed camera on the side wall of the top of the model through a sucker;
8) Connecting the sensor with a data acquisition system, and opening the relevant sensor;
9) Opening a control system and a water cooling system of the uniaxial hydraulic vibrating table, and setting vibration parameters;
10 Opening a data acquisition instrument, setting acquisition parameters, and starting sampling;
11 Starting the test, applying external vibration excitation to the model, and recording time course curves of the force sensor and the water pressure intensity sensor of each measuring point;
12 Repeating the content of step 11, repeating the test 3 times, and taking the average value of the 3 tests as the final measurement result to reduce the random error.
13 All the water in the model was drained and other settings were kept consistent with steps 9 and 10 (as a control group, the effect of external excitation on the model was excluded);
14 Repeating step 11 once and recording test data.
During the test, the displacement function X of the external excitation applied by the uniaxial hydraulic shaking table can be expressed as: x=asin (2pi ft), the acceleration function of the external stimulus can be found by the second derivative of the displacement function. Wherein A is the displacement amplitude of external excitation, f is the frequency of external excitation, and t is time.
For the liquid shaking phenomenon, when the external excitation frequency is far away from the liquid self-vibration frequency, the liquid shaking amplitude is obviously reduced, and impact load can not be generated on the top plate; only when the external excitation frequency is close to the frequency of the liquid self-vibration plate, the liquid can generate obvious shaking phenomenon, so that impact load is generated on the top plate of the water tank. Therefore, it is important to determine the natural frequency of the liquid in the tank.
And for the water tank with regular shape, calculating the natural vibration frequency of the liquid in the water tank by adopting a theoretical formula. In this experimental model, the free vibration of the liquid was described by means of a potential function, and the calculated domain is shown in fig. 4 (a) (b).
The Laplace equation for the free vibration velocity potential function of a liquid Φ is:
boundary conditions:
bringing equations (2) - (5) into equation (1), the calculation formula of the liquid self-oscillation frequency can be solved by mathematical derivation as follows:
in xi mn Is determinant delta m/2α ＝J' m/2α Y' m/2α (kξ)-J' m/2α (kξ)Y' m/2α Positive roots of (ζ) =0, J and Y are bezier functions of the first type and the second type, respectively, k=b/a, b being the inner radius of the ring sector tank, a being the outer radius of the ring sector tank; g is gravity acceleration, h is liquid depth. In this experiment we take the first order wobble frequency of the model radial (i.e. m=0, n=1, ζ mn =6.78), the natural frequency of the liquid in the model was calculated to be 1.65Hz using equation (6).
Example 3
The tank top liquid impact load was measured under a certain set of conditions, see fig. 5.
Table 1 operating mode parameters:
mounting of a bench
1) Firstly, a nuclear power plant water storage tank scaling test model is arranged on the table top of a single-axis hydraulic vibration table, and the bottom of the model is fixedly connected with the vibration table top by bolts;
2) Installing a water pressure strong sensor on the side wall of the model;
3) Injecting water into the water tank model to enable the water level to meet the test requirement;
4) Mounting a force sensor and a pressure sensor to a built-in impact top plate;
5) The built-in impact top plate is fixed on the side wall of the water tank model through an L-shaped stainless steel bracket and a transverse bolt, so that whether the top plate is kept horizontal or not can be detected by a level meter, and the distance between the bottom of the impact top plate and the liquid level is kept to be 60mm;
6) The waterproof wide-angle high-speed camera is fixed on the side wall of the top of the model through the sucker.
Operation of acquisition instrument and sensor prior to test:
1) Connecting the relevant sensor to a data acquisition system;
2) Opening and setting parameters of a data acquisition instrument;
3) The control system of the uniaxial hydraulic vibrating table is opened, the vibration waveform is set to be sine pulse wave, the wave number is 3, the displacement amplitude is 12mm, and the vibration frequency is 1.65Hz.
4) Clicking an online monitoring mode of a data acquisition system, and monitoring test data in real time;
5) Clicking the sampling button of the data acquisition system to start acquisition of test data.
Test procedure:
1) Clicking the operation of the vibration table control system to start a test;
2) Observing the data of the liquid impact load, which is acquired by the acquisition system and is applied to the top plate, after the external excitation is finished, stopping the test;
3) Repeating the steps 1-2 for two times after the liquid is calm, and recording test data of each time; 4) The model was completely emptied of water and kept in other settings consistent with the water conditions (the reason for the anhydrous test here: external excitation will have some effect on the model, we only concern the effect of liquid sloshing on the model. Therefore, we develop anhydrous experiments and record the experimental data, thereby excluding the influence of external excitation on the model);
5) Repeating the steps 1-2 once, and recording test data.
And (3) data processing:
the sensors on the built-in top plate of the test had six force sensors and six pressure sensors. And summing the data of the six force sensors to obtain the resultant force of the impact load of the liquid at the top of the water storage tank, as shown in the following figure. Next, in order to eliminate the influence of external excitation on the test, it is necessary to subtract the resultant force value of the water test from the water test, thereby obtaining the impact load of the top plate due to the liquid sloshing. In the data obtained by the force sensor, the pulling force is positive and the pressure is negative. Due to the manner in which the force sensor is fixed, when the liquid hits the top plate, the top plate falls downward, thereby generating an impact pulling force (positive peak in the figure). Thus, peaks with positive signs can be ignored in the data analysis, and only peaks in pressure experienced by the top plate, i.e. peaks with negative signs, are of interest, see fig. 5.
The distribution of the impact load of the liquid at the top of the water storage tank can be obtained through the data of the water pressure intensity sensor, as shown in the following graph. In addition, by means of the camera arranged above the model, the impact surface generated by liquid shaking can be shot and recorded, and the impact area of the liquid on the top plate can be estimated according to the image shot by the camera and the simulation calculation result. Next, the measured pressure is multiplied by the impact area of the same place, so as to obtain the impact force of the top plate at the place, which can be described by the following formula:
F＝∑P i ·S i
wherein: f is the resultant force applied by the impact top plate, P i Is the measured pressure data of the top plate water pressure strength measuring point at the ith position, S i Is the impact area of the liquid at the ith water pressure strength measuring point of the built-in top plate.
According to the test device and the test method for measuring the top liquid impact load of the water storage tank of the nuclear power plant, the test is carried out by changing different water level depths, different arrangement modes of the top protrusions and different excitation modes, the size of the top liquid impact load of the water storage tank of the nuclear power plant under different water level depths, different arrangement modes of the top protrusions and different external conditions can be determined, and support and basis are provided for the design of the water storage tank of the nuclear power plant.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a test device of nuclear power plant's storage water tank top liquid impact load, includes scale water tank model, unipolar fluid pressure type shaking table, water pressure strong sensor, force transducer, characterized by: the bottom of the scaled water tank model (1) is fixed on a single-axial hydraulic vibrating table (11), and a through hole (10) is formed in the side wall for fixing the built-in impact top plate (5); the lower part of the force sensor (4) is fixed on a built-in impact top plate (5), the upper part of the force sensor is fixed on an L-shaped stainless steel bracket (3), and the L-shaped stainless steel bracket is fixed on the side wall of the water tank model through a transverse bolt (2); the water pressure Jiang Chuangan device is arranged on the built-in impact top plate and the side wall of the model;
in the test process, excitation is applied to the scaled water tank model (1) through the uniaxial hydraulic vibration table (11), liquid in the water tank shakes, so that the liquid impacts the built-in top plate, a time course curve of the impact force of the liquid is measured through the force sensor, and the distribution condition of the impact pressure of the liquid on the top plate is measured through the water pressure intensity sensor.
2. The test device for the top liquid impact load of a water storage tank of a nuclear power plant according to claim 1, wherein the test device comprises: the built-in impact top plate (5) consists of two parts, namely a stainless steel frame (18) and an acrylic body (19), which are fixedly connected through bolts.
3. The test device for the top liquid impact load of a water storage tank of a nuclear power plant according to claim 1, wherein the test device comprises: according to experimental requirements, the top protrusion model (7) is fixed on the built-in impact top plate through a longitudinal fixing bolt (8).
4. The test device for the top liquid impact load of a water storage tank of a nuclear power plant according to claim 1, wherein the test device comprises: the force sensor and the water pressure intensity sensor are fixed on the built-in impact top plate, the time course curve of the fluid impact force can be measured through six force sensors, and the distribution condition of the liquid impact pressure on the top plate can be measured through six water pressure intensity sensors; the distribution of the impact surface when the liquid impacts the top plate is recorded by a wide angle high speed camera (12).
5. A method for testing the top liquid impact load of a water storage tank of a nuclear power plant, which is based on the device for testing the top liquid impact load of the water storage tank of the nuclear power plant according to any one of claims 1 to 4, and is characterized in that: the method comprises the following steps:
1) The method comprises the steps of installing a nuclear power plant water storage tank scaling test model on a table top of a single-axis hydraulic vibration table, and fixedly connecting the bottom of the model with the vibration table top by bolts;
2) Installing a water pressure strong sensor on the side wall of the model;
3) Injecting water into the water tank model to enable the water level to meet the test requirement;
4) If necessary, fixing the top protrusion to the built-in impact top plate by bolts;
5) Mounting a force sensor and a pressure sensor to a built-in impact top plate;
6) The built-in impact top plate is fixed on the side wall of the water tank model through an L-shaped stainless steel bracket and a transverse bolt;
7) Fixing a waterproof wide-angle high-speed camera on the side wall of the top of the model through a sucker;
8) Connecting the sensor with a data acquisition system;
9) Opening a data acquisition instrument, and setting acquisition parameters;
10 Opening a control system and a water cooling system of the vibrating table, and setting vibration parameters;
11 Starting the test, applying external vibration excitation to the model, and recording time course curves of the force sensor and the water pressure intensity sensor of each measuring point;
12 Repeating the content of the step 11 after the liquid is calm, repeating the test for 3 times, and taking the average value of the 3 tests as the final measurement result to reduce random errors;
13 All the water in the model is drained and other settings are kept consistent with steps 9 and 10;
14 Repeating step 11 once and recording test data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311021917.5A CN117054267A (en) | 2023-08-15 | 2023-08-15 | Test device and method for measuring liquid impact load at top of water storage tank of nuclear power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311021917.5A CN117054267A (en) | 2023-08-15 | 2023-08-15 | Test device and method for measuring liquid impact load at top of water storage tank of nuclear power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117054267A true CN117054267A (en) | 2023-11-14 |
Family
ID=88656660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311021917.5A Pending CN117054267A (en) | 2023-08-15 | 2023-08-15 | Test device and method for measuring liquid impact load at top of water storage tank of nuclear power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117054267A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118130280A (en) * | 2024-04-30 | 2024-06-04 | 天津城建大学 | Intensity detection device is used in solid useless admixture concrete preparation of mineral |
-
2023
- 2023-08-15 CN CN202311021917.5A patent/CN117054267A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118130280A (en) * | 2024-04-30 | 2024-06-04 | 天津城建大学 | Intensity detection device is used in solid useless admixture concrete preparation of mineral |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Bachynski et al. | Experimental and numerical investigations of monopile ringing in irregular finite-depth water waves | |
| CN117054267A (en) | Test device and method for measuring liquid impact load at top of water storage tank of nuclear power plant | |
| CN108487335A (en) | A kind of single-pile vertical orientation cyclic loading test device and method of simulation high ferro load | |
| CN108303065B (en) | Micro-amplitude vibration rock-soil dynamic settlement experimental instrument and use method | |
| CN103510503A (en) | Method for monitoring rammed point soil stabilization state vibration in real time | |
| Holcomb et al. | Instrumentation framework for molten salt reactors | |
| CN111521360A (en) | Device and method for testing modal parameters of water tank-supporting structure system | |
| CN114279733B (en) | Test device, method and application for researching dynamic response of floating nuclear power platform | |
| Tang et al. | Experimental and numerical investigation on vibro-acoustic performance of a submerged stiffened cylindrical shell under multiple excitations | |
| Hamilton et al. | Development of a large-scale laboratory facility for sediment transport research | |
| RU2652521C2 (en) | Laser system for measuring a steam containment in the heater of nuclear energy reactor | |
| CN108225268B (en) | Underwater terrain remote control measurement method for low-drainage pool | |
| CN206090517U (en) | Device of survey collapsibility of loess coefficient of controllable temperature | |
| US10460847B2 (en) | Gravity-based, non-invasive reactor system and method for coolant inventory monitoring | |
| CN115223737A (en) | Device and method for testing aerosol sedimentation of pressurized water reactor under vibration accident | |
| Lambert | Study of a double bubbler for material balance in liquids | |
| CN103195106A (en) | Automatic synchronous inclination measuring device for precast pile with circular or circular ring shaped cross section | |
| JP4793706B2 (en) | A method of investigating the inside of concrete structures in water | |
| CN207197759U (en) | A kind of spent fuel storage rack fluid structurecoupling parametric vibration platform measurement apparatus | |
| Allemann et al. | EXPERIMENTAL HIGH ENTHALPY WATER BLOWDOWN FROM A SIMPLE VESSEL THROUGH A BOTTOM OUTLET. | |
| Katona | Possibility of use of noise analysis for identification of reactor conditions during accidents | |
| CN221810602U (en) | Automatic monitoring system for sedimentation of fan foundation | |
| CN219301562U (en) | River course revetment safety integration monitoring station | |
| Kopeć et al. | Rod Bow Ultrasonic Measurements Possibilities | |
| Danforth et al. | Design of a Test Article and Test Facility to Investigate Flow-Induced Vibration of a Helical Coil Steam Generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |