CN112710543B - Containment local member strength test device - Google Patents
Containment local member strength test device Download PDFInfo
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- CN112710543B CN112710543B CN202110073749.9A CN202110073749A CN112710543B CN 112710543 B CN112710543 B CN 112710543B CN 202110073749 A CN202110073749 A CN 202110073749A CN 112710543 B CN112710543 B CN 112710543B
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- 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
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- 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
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- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a containment vessel local member strength test device which comprises a rigid counter-force base, a radial actuator group, a hydraulic oil loading mechanism and a pair of annular sliding support mechanisms, wherein an actuator group placing groove is formed in the rigid counter-force base, the radial actuator group is arranged in the actuator group placing groove and communicated with the hydraulic oil loading mechanism, and the pair of annular sliding support mechanisms are respectively arranged on two opposite side walls of the actuator group placing groove. Compared with the prior art, the containment vessel strength testing device has the characteristics of simple device, convenience in disassembly and assembly, low cost, suitability for containment vessel tests of different sizes and the like, can accurately reflect the load condition and boundary conditions of the containment vessel under an accident, can realize the purpose of researching the strength performance of the local member of the containment vessel, and meets the requirements of economy and sustainable development.
Description
Technical Field
The invention belongs to the technical field of containment vessel testing, and relates to a containment vessel local member strength testing device.
Background
The containment is the last safety protection barrier for preventing radioactive substances from diffusing to the external environment of a nuclear power plant, is a building at the outermost periphery of a reactor, contains a reactor cooling system and a nuclear steam supply system which are complex inside and an important safety system, and plays a role in isolating the external environment from the internal system and preventing the radioactive substances from diffusing to the outside when rare loss of coolant accidents and serious accidents occur. When an accident occurs to the reactor, a large amount of radioactive substances and a high-temperature and high-pressure steam-water mixture can be contained and isolated by the containment vessel so as to prevent radioactive pollution to the surrounding environment of the nuclear power plant. Due to the importance of containment, containment has historically been the focus of research in the engineering community at home and abroad.
At present, a full-scale test is mainly adopted in China, the strength performance of a containment vessel is researched by simulating an accident in the actual containment vessel, although the method can accurately simulate the actual situation, the test cost is high, the containment vessel structure can be damaged, and the economic sustainable development requirement can not be met.
Disclosure of Invention
The invention aims to provide a containment vessel local member strength test device which can accurately simulate boundary conditions and stress conditions of a containment vessel when a loss of coolant accident occurs so as to explore the strength performance of a containment vessel local member.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides a local component intensity test device of containment, the device include rigidity counter-force base, radial actuator group, hydraulic oil loading mechanism and a pair of circumferential direction slip supporting mechanism, rigidity counter-force base on seted up actuator group standing groove, radial actuator group set up in actuator group standing groove to be linked together with hydraulic oil loading mechanism, a pair of circumferential direction slip supporting mechanism set up respectively on two lateral walls that actuator group standing groove is relative.
Further, rigidity counter-force base include the base body and set up respectively at inside vertical muscle, stirrup, the prestressing steel of base body, prestressing steel lay in the lower part of base body, vertical muscle and stirrup carry out the full cross-section along the vertical cross-section of base body and lay. The base body is of a concrete structure. The rigid reaction base applies prestress by adopting a post-tensioning method and is provided with longitudinal bars and stirrups.
Furthermore, the radial actuator group comprises a plurality of radial actuators arranged in the actuator group placing groove, and the radial actuators are arranged perpendicular to the bottom surface of the actuator group placing groove. And the radial actuator adjusts the angle and the number according to the size of the containment test piece.
Furthermore, the top and the bottom of the radial actuator group are both provided with backing plates, the backing plate at the bottom of the radial actuator group is embedded in the rigid reaction base, and the backing plate at the top of the radial actuator group is fixedly connected with the bottom of the containment test piece. The contact positions of the radial actuator, the containment test piece and the rigid counter-force base are embedded with thick steel plates serving as force transmission base plates, so that the purposes of avoiding stress concentration and realizing uniform loading are achieved.
Furthermore, the hydraulic oil loading mechanism comprises a high-pressure oil pump, a synchronous distribution valve arranged on the high-pressure oil pump, and a plurality of hydraulic oil pipes arranged between the synchronous distribution valve and the radial actuator group. The radial actuators are connected with the high-pressure oil pump through the synchronous distribution valve and the hydraulic oil pipe, and synchronous loading of the radial actuators is achieved.
Furthermore, the circumferential sliding support mechanism comprises a combination plate arranged on the side wall of the actuator group placement groove and a test piece steel sleeve arranged in the combination plate in a sliding manner, and the test piece steel sleeve is fixedly connected with the end part of the containment test piece.
Furthermore, the combination plate comprises a bottom plate arranged on the side wall of the actuator group placing groove and side plates arranged on the bottom plate and enclosing into a rectangular cavity, a stiffening plate is arranged between the outer side surface of each side plate and the bottom plate, and one end of the test piece steel sleeve is arranged in the rectangular cavity in a sliding mode. The bottom plate is fixedly arranged on the base body through the embedded connecting bolts on the side wall of the actuator group placing groove, and the position of the bottom plate can be adjusted according to the size of the containment test piece.
Furthermore, one end of the test piece steel sleeve is a steel sleeve shell part, the other end of the test piece steel sleeve is a sliding guide part, the steel sleeve shell part is fixedly sleeved at one end of the containment test piece, and the sliding guide part is arranged in the rectangular cavity in a sliding mode.
Furthermore, a plurality of rivets distributed in an array mode are arranged inside the steel sleeve shell portion, and the rivets are embedded in the containment test piece. The rivets are welded inside the steel jacket housing portion. And integrally pouring the test piece steel sleeve and the containment test piece, and applying prestress on the test piece steel sleeve.
Furthermore, a plurality of guide holes are formed in the sliding guide part, and pin bolts matched with the guide holes are arranged in the rectangular cavity. The pin bolt is of a cuboid structure.
Preferably, the sliding guide part is formed by splicing a plurality of T-shaped parts in sequence, a guide hole is formed between every two adjacent T-shaped parts, the pin bolt penetrates through the corresponding guide hole, and both ends of the pin bolt are fixedly connected with the side plates. The pin bolt and the surface of the annular sliding support mechanism are polished smoothly, and the containment test piece is allowed to slide freely during loading.
The invention adopts a model test mode, uses a hydraulic oil loading mechanism and a radial actuator group to simulate the increase of the internal pressure of the containment vessel when an accident occurs, and adopts proper boundary conditions to uniformly increase the stress of the containment vessel when loading, thereby not only obtaining the strength performance of the containment vessel more accurately, but also overcoming various defects of a full-scale test and meeting the requirements of economy and sustainable development.
The high-pressure oil pump is connected with the radial actuator group through the synchronous distribution valve, and synchronous loading is achieved. The annular sliding support mechanism is used for simulating boundary conditions when the pressure in the containment vessel is increased. The test device is detachable, and the test device is adjusted according to the sizes of different test pieces before testing.
The ABAQUS is used for carrying out numerical simulation, and the stress strain of the containment vessel is basically and uniformly distributed along the annular direction and the radial direction in the loading process, so that the loading mode and the boundary condition of the test can simulate the actual condition more accurately; the rigid reaction base, the annular sliding support mechanism, the sliding guide part, the pin bolt and other members have larger rigidity and strength reserve, so that the smooth running of the test can be ensured, and larger deformation or damage can not be generated in the loading process. Therefore, the invention can achieve the purpose of testing the strength performance of the containment vessel local member.
Compared with the prior art, the invention has the following characteristics:
1) the invention provides a containment vessel local member strength test device which has the characteristics of simplicity, convenience in disassembly and assembly, low cost, suitability for containment vessel tests of different sizes and the like, can accurately reflect the load condition and boundary conditions of a containment vessel under an accident, can realize the purpose of researching the containment vessel local member strength performance, and meets the requirements of economy and sustainable development.
2) The invention provides uniformly distributed inner surface pressure through the radial actuator group and the base plate, and the increase of the internal pressure of the containment vessel is simulated when an accident occurs; the circumferential sliding support mechanism provides circumferential constraint for the test piece, radial constraint is relaxed, and the actual boundary condition of the containment can be accurately simulated.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a rigid reaction base according to the present invention;
FIG. 3 is a schematic structural diagram of a radial actuator set and a hydraulic oil loading mechanism according to the present invention;
FIG. 4 is a schematic structural view of the circumferential sliding support mechanism according to the present invention;
FIG. 5 is a schematic structural diagram of a containment test piece according to the present invention;
FIG. 6 is a sectional view taken along line A-A of FIG. 5;
FIG. 7 is a stress cloud of the test apparatus after loading in the example;
FIG. 8 is a stress cloud of a test piece of the containment vessel after prestressing in the embodiment;
FIG. 9 is a stress cloud of the loaded containment test piece in the embodiment;
FIG. 10 is a stress cloud of reinforcing steel bars of a containment test piece in an embodiment;
FIG. 11 is a stress cloud of the circumferential sliding support mechanism of the embodiment;
FIG. 12 is a stress cloud of the sliding guide of the example embodiment;
FIG. 13 is a stress cloud of a rigid reaction base according to an embodiment;
FIG. 14 is a stress cloud of steel reinforcement bars of the rigid reaction base of the example embodiment;
the notation in the figure is:
the device comprises an actuator group placement groove 1, an actuator group placement groove 2, a base body 3, a longitudinal rib 4, a stirrup 5, a prestressed reinforcement 6, a radial actuator 7, a base plate 8, a containment test piece 9, a high-pressure oil pump 10, a synchronous distribution valve 11, a hydraulic oil pipe 12, a test piece steel sleeve 13, a bottom plate 14, a side plate 14, a steel sleeve shell 15, a sliding guide part 16, a rivet 17, a guide hole 18, a pin bolt 19 and a stiffening plate 20.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example (b):
the containment local member strength test device shown in fig. 1 comprises a rigid counter-force base, a radial actuator group, a hydraulic oil loading mechanism and a pair of circumferential sliding supporting mechanisms, wherein an actuator group placing groove 1 is formed in the rigid counter-force base, the radial actuator group is arranged in the actuator group placing groove 1 and communicated with the hydraulic oil loading mechanism, and the pair of circumferential sliding supporting mechanisms are respectively arranged on two opposite side walls of the actuator group placing groove 1.
As shown in fig. 2, the rigid reaction base includes a base body 2, and a longitudinal bar 3, a stirrup 4, and a prestressed reinforcement 5, which are respectively disposed inside the base body 2, wherein the prestressed reinforcement 5 is disposed on the lower portion of the base body 2, and the longitudinal bar 3 and the stirrup 4 are disposed along the vertical cross section of the base body 2 in a full cross section.
As shown in fig. 3, the radial actuator group includes a plurality of radial actuators 6 arranged in the actuator group placement groove 1, and the radial actuators 6 are arranged perpendicular to the bottom surface of the actuator group placement groove 1. The top and the bottom of the radial actuator group are both provided with a backing plate 7, the backing plate 7 at the bottom of the radial actuator group is embedded in the rigid counter-force base, and the backing plate at the top of the radial actuator group is fixedly connected with the bottom of the containment test piece 8.
The hydraulic oil loading mechanism includes a high-pressure oil pump 9, a synchronous distribution valve 10 provided on the high-pressure oil pump 9, and a plurality of hydraulic oil pipes 11 provided between the synchronous distribution valve 10 and the radial actuator group.
As shown in fig. 4, 5 and 6, the circumferential sliding support mechanism includes a composition plate disposed on the side wall of the actuator group placement groove 1 and a test piece steel sleeve 12 slidably disposed in the composition plate, and the test piece steel sleeve 12 is fixedly connected with the end of the containment test piece 8. The combined plate comprises a bottom plate 13 arranged on the side wall of the actuator group placing groove 1 and side plates 14 arranged on the bottom plate 13 and enclosing a rectangular cavity, a stiffening plate 20 is arranged between the outer side surfaces of the side plates 14 and the bottom plate 13, and one end of a test piece steel sleeve 12 is arranged in the rectangular cavity in a sliding mode. One end of the test piece steel sleeve 12 is a steel sleeve shell part 15, the other end of the test piece steel sleeve is a sliding guide part 16, the steel sleeve shell part 15 is fixedly sleeved at one end of the containment test piece 8, and the sliding guide part 16 is arranged in the rectangular cavity in a sliding mode. A plurality of rivets 17 distributed in an array mode are arranged inside the steel sleeve shell portion 15, and the rivets 17 are embedded in the containment test piece 8. The sliding guide part 16 is provided with a plurality of guide holes 18, and a pin 19 matched with the guide holes 18 is arranged in the rectangular cavity.
The installation process of the test device is as follows:
and (3) pouring a rigid reaction base, embedding the bolts and the base plate 7 during pouring, and applying prestress by adopting a post-tensioning method. Connecting the annular sliding support mechanism to the bolt; pouring the containment test piece 8 and the test piece steel sleeve 12 together, embedding the base plate 7 on the containment test piece 8, and applying the containment prestress on the test piece steel sleeve 12; after the test piece is manufactured, the test piece is placed on a rigid counter-force base and is fixed with the annular sliding support mechanism through a pin 19; a radial actuator 6 is mounted. And starting the radial actuator 6 after the assembly is finished, and then carrying out the strength test of the containment vessel local component.
Numerical simulation is carried out through ABAQUS, after parts are created and assembled, prestress is applied to the containment test piece 8 through a cooling method, a static general analysis step is created to analyze the device, and concentrated load is applied to the base plate 7. As can be seen from fig. 7, 8, 9 and 10, the internal forces of the containment test piece 8 and the internal prestressed steel strand before and after loading are uniformly distributed, and the fitting with the actual situation is accurate; as can be seen from fig. 11, after loading, the circumferential sliding support mechanism and the pin bolt are still in an elastic state, and the rigidity is high; as can be seen from fig. 12, the connection part of the sliding guide part 16 and the prestressed steel strand enters plasticity due to stress concentration, but the stress of other parts is small, and the rigidity of the connection piece is not affected; as can be seen from fig. 13 and 14, the rigid reaction base and the internal steel bars thereof are still in an elastic state after being loaded, so that a large rigidity and strength reserve can be ensured in the loading process, and the smooth proceeding of the test can be ensured.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (5)
1. A containment local member strength test device is characterized by comprising a rigid counter-force base, a radial actuator group, a hydraulic oil loading mechanism and a pair of circumferential sliding support mechanisms, wherein the rigid counter-force base is provided with an actuator group placing groove (1), the radial actuator group is arranged in the actuator group placing groove (1) and communicated with the hydraulic oil loading mechanism, and the pair of circumferential sliding support mechanisms are respectively arranged on two opposite side walls of the actuator group placing groove (1);
the circumferential sliding support mechanism comprises a composition plate arranged on the side wall of the actuator group placement groove (1) and a test piece steel sleeve (12) arranged in the composition plate in a sliding manner, and the test piece steel sleeve (12) is fixedly connected with the end part of the containment test piece (8);
the combined plate comprises a bottom plate (13) arranged on the side wall of the actuator group placing groove (1) and side plates (14) arranged on the bottom plate (13) and enclosing a rectangular cavity, a stiffening plate (20) is arranged between the outer side surfaces of the side plates (14) and the bottom plate (13), and one end of the test piece steel sleeve (12) is arranged in the rectangular cavity in a sliding mode;
one end of the test piece steel sleeve (12) is a steel sleeve shell part (15), the other end of the test piece steel sleeve is a sliding guide part (16), the steel sleeve shell part (15) is fixedly sleeved at one end of the containment test piece (8), and the sliding guide part (16) is arranged in the rectangular cavity in a sliding mode;
a plurality of rivets (17) distributed in an array manner are arranged inside the steel sleeve shell part (15), and the rivets (17) are embedded in the containment test piece (8);
a plurality of guide holes (18) are formed in the sliding guide part (16), and a pin bolt (19) matched with the guide holes (18) is arranged in the rectangular cavity;
the radial actuator group is used for providing uniformly distributed inner surface pressure and simulating the increase of the internal pressure of the containment vessel when an accident occurs; the annular sliding support mechanism is used for providing annular restraint for the containment test piece (8) and relaxing radial restraint so as to accurately simulate the actual boundary conditions of the containment.
2. The containment local member strength test device according to claim 1, wherein the rigid reaction base comprises a base body (2), and a longitudinal bar (3), a hoop bar (4) and a prestressed bar (5) which are respectively arranged inside the base body (2), the prestressed bar (5) is arranged at the lower part of the base body (2), and the longitudinal bar (3) and the hoop bar (4) are arranged in a full section along a vertical section of the base body (2).
3. The containment local member strength test device according to claim 1, wherein the radial actuator group comprises a plurality of radial actuators (6) arranged in the actuator group placement groove (1), and the radial actuators (6) are arranged perpendicular to the bottom surface of the actuator group placement groove (1).
4. The containment local member strength test device according to claim 1, wherein the top and the bottom of the radial actuator group are provided with backing plates (7), the backing plate (7) at the bottom of the radial actuator group is embedded in a rigid reaction base, and the backing plate at the top of the radial actuator group is fixedly connected with the bottom of a containment test piece (8).
5. The containment local member strength test device according to claim 1, wherein the hydraulic oil loading mechanism comprises a high-pressure oil pump (9), a synchronous distribution valve (10) arranged on the high-pressure oil pump (9), and a plurality of hydraulic oil pipes (11) arranged between the synchronous distribution valve (10) and the radial actuator group.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110073749.9A CN112710543B (en) | 2021-01-20 | 2021-01-20 | Containment local member strength test device |
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| CN202110073749.9A CN112710543B (en) | 2021-01-20 | 2021-01-20 | Containment local member strength test device |
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