Small nuclear power tensile shock insulation system capable of being changed based on function requirements

Abstract

The invention discloses a small nuclear power tensile shock insulation system capable of changing based on functional requirements. The small nuclear power tensile shock insulation system comprises a small nuclear island, an instrument control module room, an assembled raft plate, a track sliding support, a buttress and a base, the rail sliding support comprises an upper sliding rail, a hinged sliding block set and a lower sliding rail, and the upper sliding rail and the lower sliding rail are arranged in parallel and orthogonally. The hinged sliding block set comprises an upper sliding block, a supporting block, a lower sliding block and a high-strength bolt, the upper sliding block is hinged to the supporting block through the high-strength bolt, and the lower sliding block is hinged to the supporting block through the high-strength bolt. The upper sliding rail and the lower sliding rail both comprise sliding rails with four characteristics, namely a fixed curvature radius type and a fixed friction coefficient type; the curvature radius is fixed, and the friction coefficient is variable; the curvature radius is variable, and the friction coefficient is fixed; a variable curvature radius and variable friction coefficient type is adopted; according to the characteristics of the factory site, the sliding rails with the corresponding characteristics are selected to form the rail sliding supports, and the multiple rail sliding supports form the shock insulation layer. Standardized design and rapid assembly type installation can be adopted, and the device belongs to the small nuclear power seismic isolation technology.

Description

Technical Field

[0001] The invention relates to a small-scale nuclear power seismic isolation technology, and in particular to a small-scale nuclear power tensile seismic isolation system that can be changed based on functional requirements. Background Art

[0002] Small nuclear power, also known as small nuclear reactors or small modular reactors (SMR), refers to nuclear power plants with an electric power of less than 300,000 kilowatts (300 megawatts). Compared with traditional large nuclear power plants, small nuclear power plants have the characteristics of small power, low investment, and strong flexibility. They usually adopt modular design and can be manufactured, transported and assembled quickly as a whole, thus achieving economies of scale.

[0003] At present, due to the high cost of large nuclear islands, long design cycles, difficult site selection and high hazards, nuclear power plants are gradually developing in the direction of miniaturization and standardization, but the problems that come with it are that site selection is more difficult and seismic resistance is deteriorating. Earthquakes are one of the most destructive natural disasters to building structures, and seismic isolation technology can effectively reduce the damage of earthquakes. However, some seismic motions with long-period characteristics and pulse effects are still harmful to some existing seismic isolation systems. In addition, small nuclear power plants are light in weight and have characteristics such as reaction liquid sloshing. Generally, rubber-type seismic isolation bearings cannot meet the requirements of modular design of small nuclear power reactors due to the coupling of seismic isolation efficiency and upper mass. Although traditional friction pendulum seismic isolation bearings can meet the design requirements, when analyzing the seismic response of nuclear power structures, three-way input seismic motion is required, and the vertical direction cannot withstand tension. In addition, the bearings can only be seismically isolated for one level of earthquake action, and do not have the adaptability to multiple levels of earthquake action. In addition, under the action of long-period pulse seismic waves, seismic isolation structures are prone to low-frequency resonance, and the seismic response may be amplified, resulting in tensile instability of the bearings and huge damage. These defects limit the application of seismic isolation technology in the field of small nuclear power, thereby delaying the promotion and application of small nuclear power systems. Summary of the invention

[0004] In view of the technical problems existing in the prior art, the purpose of the present invention is to provide a small-scale nuclear power tensile isolation system that can be changed based on functional requirements, so that the miniaturized and standardized nuclear power system can meet the needs of different plant sites and earthquakes of different intensities without changing its own design, and can achieve anti-sway and anti-overturning and rapid assembly to complete the construction. In addition, the different sliding rail surfaces have a certain degree of adaptability, which also improves the safety margin of the nuclear power system.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A small nuclear power tensile seismic isolation system that can be changed based on functional requirements, including: a standard small nuclear island, an instrument control module room matched with the small nuclear island, an assembled raft connected by bolts, a multifunctional tensile track sliding support, a pier matched with the track sliding support, and a base located at the bottom; the small nuclear island and the instrument control module room are both installed on the assembled raft, the lower end of the assembled raft is connected to the track sliding support through the pier, and the lower end of the track sliding support is connected to the base through the pier; the track sliding support includes an upper slide rail, a hinged slider group, and a lower slide rail, and the upper slide rail and the lower slide rail are parallel and orthogonal Arrangement; the articulated slider group includes an upper slider, a support block, a lower slider, and high-strength bolts. The upper slider matched with the upper slide rail is hinged to the support block through high-strength bolts, and the lower slider matched with the lower slide rail is hinged to the support block through high-strength bolts; the upper slide rail and the lower slide rail of the track sliding support both contain four types of characteristic slide rails, namely: fixed curvature radius, fixed friction coefficient type; fixed curvature radius, variable friction coefficient type; variable curvature radius, fixed friction coefficient type; variable curvature radius, variable friction coefficient type; according to the characteristics of the plant site, slide rails with corresponding characteristics are selected to form the track sliding support, and multiple track sliding supports form the seismic isolation layer.

[0007] As a preferred embodiment, the assembled raft is prefabricated and provided with a plurality of bolt holes, and is connected to the small nuclear island and the instrument control module room located at the upper part by bolts. After adopting this structure, the assembled raft is a standardized prefabricated type, which can be modularly designed and quickly assembled.

[0008] As a preferred embodiment, the lower part of the shell of the small nuclear island is provided with screw holes corresponding to the bolt holes of the assembled raft; the lower part of the outer box of the instrument control module room is provided with screw holes corresponding to the bolt holes of the assembled raft. With this structure, the small nuclear island is a standardized prefabricated type, and the small nuclear island and the instrument control module room can be quickly assembled and connected with the assembled raft by bolts.

[0009] As a preference, the base is fixed to the ground or to a moving transport vehicle.

[0010] As a preferred embodiment, in the isolation layer, the number and arrangement positions of the track sliding bearings are determined by the characteristics of the track sliding bearings in two directions; the equivalent center of mass and center of rigidity in two directions of the isolation layer and the center of mass and center of rigidity of the upper structure above the isolation layer are adjusted independently without affecting each other.

[0011] As a preferred embodiment, in the track sliding support, the lower side of the upper slide rail is the slide rail surface, and the shape of the slide rail surface is an upward concave arc surface; the upper side of the lower slide rail is the slide rail surface, and the shape of the slide rail surface is a downward concave arc surface; both sides of the upper slide rail and the lower slide rail are provided with lateral protrusions, and the upper end of the upper slider and the lower end of the lower slider are provided with clamping parts, and the clamping parts are clamped into the protrusions; the length direction of the high-strength bolts connecting the lower part of the upper slider with the upper part of the support block is set along the width direction of the upper slide rail, and the high-strength bolts are set horizontally; the length direction of the high-strength bolts connecting the upper part of the lower slider with the lower part of the support block is set along the width direction of the lower slide rail, and the high-strength bolts are set horizontally. After adopting this structure, the upper and lower slide rails are prevented from detaching and overturning and swaying under the action of vertical earthquakes through the structure of the protrusion and the clamping part; the upper and lower buckles and the slider can rotate in coordination by adopting the connection method of the articulated slider group, avoiding the disadvantage that only the upper and lower sliders rotate with the curvature of the sliding surface, while the buckles do not rotate. It forms an articulated system that can only rotate in the orthogonal direction, ensuring that the upper and lower slide rails are completely parallel and orthogonal during operation, so that the upper structure does not tilt. The special constraint function composed of the buckle and high-strength bolts of the articulated slider group makes the upper structure only move horizontally, and cannot separate up and down or swing.

[0012] As a preferred embodiment, a fixed curvature radius, fixed friction coefficient type slide rail is as follows: the slide rail surface is an arc surface with a fixed curvature radius, and the entire arc surface has the same friction coefficient; a fixed curvature radius, variable friction coefficient type slide rail is as follows: the slide rail surface is an arc surface with a fixed curvature radius, and the entire arc surface is divided into several areas, each area has a different friction coefficient, and the overall distribution of the friction coefficient increases in a certain proportion from the middle slide rail surface to the two end slide rail surfaces; a variable curvature radius, fixed friction coefficient type slide rail is as follows: the slide rail surface is divided into multiple areas, each area has a different curvature radius, and the friction coefficient is the same; a variable curvature radius, variable friction coefficient type slide rail is as follows: the slide rail friction surface consists of a central arc sliding surface and a straight sliding surface tangent to the end points of the arc sliding surface, the friction coefficient of the arc area is small, and the friction coefficient of the straight area is large.

[0013] As a preferred embodiment, in the track sliding support, one or two sliding rails with different characteristics are selected according to functional requirements, and combined with an articulated slider group to assemble the track sliding support.

[0014] As a preferred embodiment, the installation position of the track sliding bearing is adjusted so that the equivalent center of mass and center of rigidity of the seismic isolation layer coincide with the upper structure. The number and arrangement position of the track sliding bearing are determined by the mass, center of rigidity and center of mass of the upper structure.

[0015] As a preferred embodiment, according to the characteristics of the plant site, the principles for selecting slide rails with corresponding characteristics are as follows: when the displacement constraint requirements are high, the same fixed curvature radius and variable friction coefficient slide rails are selected in two directions; when the reaction liquid sloshing frequency sensitivity requirements are high, the same variable curvature radius and fixed friction coefficient slide rails are selected in two directions; when the seismic isolation effect requirements are high, a combination of fixed curvature radius and fixed friction coefficient and variable curvature radius and variable friction coefficient slide rails are selected in two directions; when multi-level defense capabilities are required, a combination of fixed curvature radius and variable friction coefficient and variable curvature radius and variable friction coefficient slide rails are selected in two directions.

[0016] The present invention has the following advantages:

[0017] Compared with the prior art, the small nuclear power tensile isolation system of the present invention can be designed based on the changes in functional requirements. The small nuclear island and the supporting instrument control module room can be installed in a standardized and quickly assembled manner. Combined with the isolation layer flexibly designed based on functional requirements, it can be applied to different plant sites and different seismic intensity zones without the need to re-design the seismic resistance of the upper structure. Different slide rails with different functions are selected for combined installation in different seismic intensity zones, and its unique articulated slider group cooperates with the slide rail to prevent the structural system from being pulled, overturned and swayed under the action of vertical earthquakes. The parts on the assembled raft are all connected by bolts, and the assembled raft is prefabricated, which is convenient for modular design. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a schematic diagram of the overall assembly of a small nuclear power tensile isolation system that can be changed based on functional requirements.

[0019] Figure 2a This is a top view of a small nuclear power tensile isolation system.

[0020] Figure 2b A top view of the fabricated raft.

[0021] Figure 2c A top view of the base.

[0022] Figure 2d This is a top view of the pier.

[0023] Figure 3 Schematic diagram of the movement of the seismic isolation layer.

[0024] Figure 4a It is a three-dimensional diagram of the track sliding support.

[0025] Figure 4b This is a disassembled diagram of the track sliding support.

[0026] Figure 5Schematic diagram of the mechanical properties of track sliding supports with four types of slide rails.

[0027] 1: small nuclear island; 1-1: screw holes at the bottom of the outer shell of the small nuclear island; 2: instrument control module room; 2-1: screw holes at the bottom of the outer box of the instrument control module room; 3: track sliding support; 3-1: upper slide rail; 3-2: lower slide rail; 3-3: upper slider; 3-4: support block; 3-5: lower slider; 3-6: first bolt; 3-7: second bolt; 4: assembled raft; 4-1: bolt holes of assembled raft; 5: pier; 5-1: bolt holes for connecting the pier to the track sliding support; 6: base; 6-1: bolt holes of the base. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] A small nuclear power tensile and seismic isolation system that can be changed based on functional requirements includes: a standard small nuclear island, an instrument control module room matching the small nuclear island, an assembled raft plate connected by bolts, a multifunctional tensile track sliding support, a pier matching the track sliding support, and a base located at the bottom.

[0030] Among them, the small nuclear island is prefabricated. The small nuclear island and the instrument control module room can be standardized according to earthquakes of a certain intensity. The assembled raft is prefabricated and has multiple bolt holes for bolt connection with the upper and lower structures. The pier is prefabricated and serves as a link between the upper and lower parts.

[0031] Place the small nuclear island and instrument control module room at the corresponding positions of the assembled raft. Make sure that the screw holes at the bottom of the shell of the small nuclear island correspond to the bolt holes of the assembled raft, and connect them with bolts.

[0032] Align the screw holes on the lower part of the outer box of the instrument control module room with the bolt holes on the assembled raft and connect them by bolts.

[0033] The base is fixed at a designated location through the bolt holes reserved in the base, and the buttress is placed at a corresponding position and connected to the upper part of the base by bolts. The base is fixed to the ground or to a mobile transport vehicle, and in this embodiment, is fixed to the ground.

[0034] The track sliding support includes an upper slide rail, an articulated slider group, and a lower slide rail, and the upper slide rail and the lower slide rail are arranged in parallel and orthogonally. The articulated slider group includes an upper slider, a support block, a lower slider, and high-strength bolts. The upper slider matched with the upper slide rail is hinged to the support block through high-strength bolts, and the lower slider matched with the lower slide rail is hinged to the support block through high-strength bolts.

[0035] In the track sliding support, the lower side of the upper slide rail is the slide rail surface, and the shape of the slide rail surface is an upward concave arc surface; the upper side of the lower slide rail is the slide rail surface, and the shape of the slide rail surface is a downward concave arc surface; both sides of the upper slide rail and the lower slide rail are provided with lateral protrusions, and the upper end of the upper slider and the lower end of the lower slider are provided with clamping parts, and the clamping parts are clamped into the protrusions. The length direction of the high-strength bolt (first bolt 3-6) connecting the lower part of the upper slider with the upper part of the support block is set along the width direction of the upper slide rail, and the high-strength bolt is set horizontally; the length direction of the high-strength bolt (second bolt 3-7) connecting the upper part of the lower slider with the lower part of the support block is set along the width direction of the lower slide rail, and the high-strength bolt is set horizontally. The clearance fit between the slider and the slide rail can ensure a smooth transition at the curvature change, and the "concave"-shaped clamping part of the slider buckles the protrusion of the slide rail, and the slider is bound by the high-strength bolt to prevent tensile damage.

[0036] After the upper slide rail and the lower slide rail are connected by the hinged slider group, they are in a cross-shaped orthogonal parallel state and are constrained. Then the upper slide rail is connected to the upper pier by bolts; the lower slide rail is connected to the lower pier by bolts. After installation, the constraint is released.

[0037] The upper and lower rails of the track sliding bearings contain four types of rails, namely: fixed curvature radius, fixed friction coefficient type; fixed curvature radius, variable friction coefficient type; variable curvature radius, fixed friction coefficient type; variable curvature radius, variable friction coefficient type. In the track sliding bearing, one or two types of rails are selected according to functional requirements, combined with the articulated slider group, to assemble the track sliding bearing. According to the characteristics of the plant site, rails with corresponding characteristics are selected to form the track sliding bearing, and multiple track sliding bearings form the seismic isolation layer.

[0038] Figure 5 As shown in (a), the slide rail has a fixed curvature radius R and a fixed friction coefficient μ: the slide rail surface is an arc surface with a fixed curvature radius R, which makes it have the characteristics of a simple pendulum and a certain self-reset ability. The entire arc surface is roughened to have the same friction coefficient μ.

[0039] Figure 5As shown in (b), the slide rail with fixed curvature radius R and variable friction coefficient is as follows: the slide rail surface is an arc surface with a fixed curvature radius R, which makes it have the characteristics of a simple pendulum and a certain self-reset ability. The entire arc surface is divided into several areas, and each area is polished with different roughness to make its friction coefficient μ1, μ2, and μ3 different. The overall distribution of the friction coefficient increases in a certain proportion from the middle slide rail surface to the two end slide rail surfaces.

[0040] Figure 5 As shown in (c), the sliding rail with variable curvature radius and fixed friction coefficient is as follows: the sliding rail surface is divided into multiple areas, the curvature radius of each area is different R1≠R2≠R3, and the overall distribution of the curvature radius decreases from the middle surface to the two end surfaces in a certain proportion R1>R2>R3, and the friction coefficient μ is the same in all areas.

[0041] Figure 5 As shown in (d), the variable curvature radius R1≠R2≈∞, and the variable friction coefficient μ1≠μ2 type slide rail is: the slide rail friction surface is composed of a central arc sliding surface and a straight sliding surface tangent to the end points of the arc sliding surface. The friction coefficient μ1 in the arc area is small, and the friction coefficient μ2 in the straight area is large.

[0042] According to the characteristics of the plant site, the principles for selecting slide rails with corresponding characteristics are as follows: when the displacement constraint requirements are high, the same fixed curvature radius and variable friction coefficient slide rails are selected in two directions; when the sensitivity requirements for the reaction liquid sloshing frequency are high, the same variable curvature radius and fixed friction coefficient slide rails are selected in two directions; when the seismic isolation effect requirements are high, a combination of fixed curvature radius and fixed friction coefficient and variable curvature radius and variable friction coefficient slide rails are selected in two directions; when multi-level defense capabilities are required, a combination of fixed curvature radius and variable friction coefficient and variable curvature radius and variable friction coefficient slide rails are selected in two directions.

[0043] In the isolation layer, the number and arrangement of track sliding bearings are determined by the characteristics of the track sliding bearings in two directions. The equivalent center of mass and rigidity center of the isolation layer in two directions are adjusted independently from the center of mass and rigidity center of the superstructure above the isolation layer, and do not affect each other. By adjusting the installation position of the track sliding bearing, the equivalent center of mass and rigidity center of the isolation layer are made to coincide with the superstructure. The number and arrangement of track sliding bearings are determined by the mass, rigidity center and center of mass of the superstructure.

[0044] By reasonably adjusting only the design parameters of the track sliding bearing, the small nuclear island can be applied to areas with various levels of earthquake intensity and areas that may be accompanied by long-period pulse earthquakes. When the earthquake force exceeds the static friction force of the track sliding bearing in the corresponding direction, movement occurs between the slider and the slide rail, and the system begins to isolate the system. When the earthquake action increases further, the variable friction type slide rail will increase its stiffness and reduce the displacement; the isolation period of the variable curvature radius and fixed friction coefficient type slide rail will begin to change to avoid frequency resonance. When the earthquake action increases again, the linear variable curvature stiffness can soften, which can effectively reduce the earthquake action, and an optimal state can be achieved by increasing the friction coefficient. When the design limit is exceeded, the clamping part of the slider buckles the raised part of the slide rail, and the high-strength bolts restrain the slider to prevent tensile damage.

[0045] Compared with the existing technology, the track sliding support of the small nuclear power tensile isolation system is formed by a combination of orthogonal upper and lower sliding rails. The articulated slider group supporting the upper and lower sliding rails can prevent the track sliding support from being tensilely damaged under the action of vertical seismic motion. Different slide rails have different functions and can be combined in a targeted manner according to the characteristics of the plant site, so as to be able to cope with different types of seismic motions, and show adaptability as the earthquake intensity increases. Therefore, the safety of the nuclear power system can be ensured at different plant sites, which increases the application scope of the upper standardized nuclear power system, further shortens the design cycle, and reduces the design cost.

[0046] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A small-scale nuclear power tensile isolation system that can be changed based on functional requirements, characterized in that: include: A standard small nuclear island, an instrument control module room matched with the small nuclear island, an assembled raft connected by bolts, a multifunctional tensile track sliding support, a pier matched with the track sliding support, and a base located at the bottom; the small nuclear island and the instrument control module room are both installed on the assembled raft, the lower end of the assembled raft is connected to the track sliding support through the pier, and the lower end of the track sliding support is connected to the base through the pier; the track sliding support includes an upper slide rail, an articulated slider group, and a lower slide rail, and the upper slide rail and the lower slide rail are arranged in parallel and orthogonally; the articulated slider group includes an upper slider, a support block, a lower slider, and high-strength bolts, the upper slider matched with the upper slide rail is hinged to the support block through high-strength bolts, and the lower slider matched with the lower slide rail is hinged to the support block through high-strength bolts; The upper and lower rails of the track sliding support both include four types of rails, namely: fixed curvature radius, fixed friction coefficient type; fixed curvature radius, variable friction coefficient type; variable curvature radius, fixed friction coefficient type; variable curvature radius, variable friction coefficient type; According to the characteristics of the factory site, slide rails with corresponding characteristics are selected to form track sliding bearings, and multiple track sliding bearings form a seismic isolation layer.

2. A small-scale nuclear power tensile isolation system that can be changed based on functional requirements according to claim 1, characterized in that: The assembled raft is prefabricated and has multiple bolt holes, which are connected to the small nuclear island located on the upper part and the instrument control module room through bolts.

3. A small-scale nuclear power tensile isolation system that can be changed based on functional requirements according to claim 2, characterized in that: The lower part of the shell of the small nuclear island is provided with screw holes corresponding to the bolt holes of the assembled raft; the lower part of the outer box of the instrument control module room is provided with screw holes corresponding to the bolt holes of the assembled raft.

4. A small-scale nuclear power tensile isolation system that can be changed based on functional requirements according to claim 1, characterized in that: The base is fixed to the ground or to a moving vehicle.

5. A small-scale nuclear power tensile isolation system that can be changed based on functional requirements according to claim 1, characterized in that: In the isolation layer, the number and arrangement positions of the track sliding bearings are determined by the characteristics of the track sliding bearings in two directions; the equivalent center of mass and center of rigidity in two directions of the isolation layer and the center of mass and center of rigidity of the superstructure above the isolation layer are adjusted independently without affecting each other.

6. A small-scale nuclear power tensile isolation system that can be changed based on functional requirements according to claim 1, characterized in that: In the track sliding support, the lower side of the upper slide rail is the slide rail surface, and the shape of the slide rail surface is an upward concave arc surface; the upper side of the lower slide rail is the slide rail surface, and the shape of the slide rail surface is a downward concave arc surface; both sides of the upper slide rail and the lower slide rail are provided with lateral protrusions, and the upper end of the upper slider and the lower end of the lower slider are provided with clamping parts, and the clamping parts are inserted into the protrusions; the length direction of the high-strength bolts connecting the lower part of the upper slider and the upper part of the support block are arranged along the width direction of the upper slide rail, and the high-strength bolts are arranged horizontally; the length direction of the high-strength bolts connecting the upper part of the lower slider and the lower part of the support block are arranged along the width direction of the lower slide rail, and the high-strength bolts are arranged horizontally.

7. A small-scale nuclear power tensile isolation system that can be changed based on functional requirements according to claim 6, characterized in that: Fixed curvature radius, fixed friction coefficient type slide rail: the slide rail surface is a circular arc surface with a fixed curvature radius, and the entire circular arc surface has the same friction coefficient; Fixed curvature radius, variable friction coefficient type slide rail: the slide rail surface is a circular arc surface with a fixed curvature radius. The entire circular arc surface is divided into several areas. The friction coefficient of each area is different. The overall distribution of the friction coefficient increases in a certain proportion from the middle slide rail surface to the two end slide rail surfaces. The variable curvature radius and fixed friction coefficient type slide rail is: the slide rail surface is divided into multiple areas, each area has a different curvature radius and the same friction coefficient; The variable curvature radius and variable friction coefficient type slide rail is as follows: the slide rail friction surface is composed of a central arc-shaped sliding surface and a straight sliding surface tangent to the end points of the arc sliding surface. The friction coefficient of the arc area is small, and the friction coefficient of the straight area is large.

8. A small-scale nuclear power tensile isolation system that can be changed based on functional requirements according to claim 1, characterized in that: In the track sliding support, one or two characteristic slide rails are selected according to functional requirements, combined with an articulated slider group, to assemble the track sliding support.

9. A small-scale nuclear power tensile isolation system that can be changed based on functional requirements according to claim 5, characterized in that: The installation position of the track sliding bearing is adjusted to make the equivalent center of mass and center of rigidity of the isolation layer coincide with the upper structure.

10. A small-scale nuclear power tensile isolation system that can be modularly designed based on functional requirements according to claim 1, characterized in that: According to the characteristics of the factory site, the principles for selecting slide rails with corresponding characteristics are as follows: When the displacement constraint requirement is high, the same fixed curvature radius and variable friction coefficient slide rail are selected in both directions; When the requirements for the sloshing frequency sensitivity of the reaction liquid are high, the same variable curvature radius and fixed friction coefficient type slide rails are selected in both directions; When the seismic isolation effect is required to be high, the fixed curvature radius, fixed friction coefficient type and the variable curvature radius, variable friction coefficient type slide rails are selected in two directions for combination; When multi-level defense capability is required, a combination of fixed curvature radius, variable friction coefficient type and variable curvature radius, variable friction coefficient type slide rails are selected in two directions.

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