An impact-resistant device and its construction method

Abstract

This invention discloses an impact-resistant device and its construction method. The impact-resistant device includes an impact module (1), which is attached to the impact module (1) to form the impact-resistant device. The impact module (1) includes an impact panel (11), an energy-absorbing core layer (12), and a friction fixing panel (13). The friction fixing panel (13), the energy-absorbing core layer (12), and the impact panel (11) are arranged sequentially from the inside to the outside along the facility to be protected in the impact module (1). The friction fixing panel (13), the energy-absorbing core layer (12), and the impact panel (11) are fastened together by bolts to form the impact module (1). This invention solves the problems of insufficient environmental adaptability, weak engineering application capability, and lack of systematic optimization design methods of buffer energy-absorbing protection structures under complex operating conditions of nuclear facilities.

Description

Technical Field

[0001] This invention relates to the field of nuclear engineering safety protection technology, specifically to an impact-resistant device and its construction method. Background Technology

[0002] The safety of nuclear facilities is the cornerstone of nuclear energy development, and their protection systems must be capable of withstanding various severe internal and external events. Traditional protection designs mainly rely on increasing the thickness, strength, and stiffness of reinforced concrete structures, i.e., a "rigid protection" strategy. This approach has the following inherent drawbacks: poor adaptability: it is difficult to effectively, economically, and quickly upgrade the protection of in-service nuclear facilities; and a bottleneck in protection effectiveness: rigid structures rely primarily on "hard resistance," with limited energy dissipation capacity, making them prone to sudden brittle failure under severe loads exceeding design thresholds.

[0003] Energy-absorbing buffer technology based on the energy dissipation of plastic deformation of materials is an effective way to improve the impact and blast resistance of structures. Among them, multicellular materials (such as metal foam and honeycomb structures) have become a research hotspot due to their high specific strength and high energy absorption efficiency. However, applying such technologies to the protection of nuclear facilities still faces the following problems: First, directly installing multicellular materials on the outside of nuclear facilities lacks nuclear condition specificity: existing research is mostly based on the conventional properties of materials and does not fully consider the severe service environment of nuclear facilities, such as high temperature, high strain rate and high energy radiation, making it difficult to guarantee the long-term reliability of materials and structures. Second, the structural form is disconnected from engineering: existing buffer structures are mostly simple sandwich panels at the laboratory scale, which have not formed standardized and modular engineering products, making it difficult to meet the protection needs of large-scale and irregular areas of nuclear facilities, and even more difficult to support the rapid transformation of in-service facilities. In addition, the current design methods for nuclear facility protection devices are not systematic, lacking a complete and closed-loop design process from the analysis of specific threat scenarios of nuclear facilities, material compatibility screening, structural parameter optimization to installation method adaptation. The design process relies on experience, and the predictability, reliability and universality of the results are insufficient.

[0004] Patent document CN120902401A discloses a protective device and a testing system. The protective device includes a first barrier layer and a second barrier layer. The first barrier layer has a plurality of first protrusions distributed at intervals. The second barrier layer is connected to the side of the first barrier layer opposite to the first protrusions. The second barrier layer is filled with a first fluid, which is a shear-thickening fluid, thereby improving the protective performance of the protective device. However, it does not solve the problems of insufficient environmental adaptability, weak engineering application capability, and lack of systematic optimization design methods of buffer energy absorption protection structures under complex operating conditions of nuclear facilities.

[0005] Patent document CN118278084A discloses a single-shell soft containment design method and nuclear power plant for resisting commercial aircraft impacts. This method includes a single-layer containment design scheme and other nuclear island building design schemes. For the initially developed single-layer prestressed reinforced concrete containment design scheme, the impact-prone areas are screened. For the screened areas, mechanical simulation data of the single-layer containment in those areas is obtained. Based on the mechanical simulation data, the structural integrity, equipment integrity, and fuel infiltration of the containment after impact are analyzed. The analysis results determine whether the reactor core inside the containment can maintain cooling after impact. If cooling is maintained, the design scheme is adopted; otherwise... The containment design will continue to be optimized until it can maintain cooling. For other preliminary nuclear island building designs, the impact-reachable areas will be screened, and the physical damage range, vibration impact range, and fire impact range of the screened areas will be analyzed. The analysis results will determine whether the core and spent fuel can maintain cooling after an impact. If they can, the design will be adopted; otherwise, the design will be adjusted until it is determined that the core and spent fuel can maintain cooling after an impact. The problems of insufficient environmental adaptability, weak engineering application capability, and lack of systematic optimization design methods for buffer energy-absorbing protection structures under complex operating conditions of nuclear facilities have not been resolved.

[0006] In summary, neither of the two existing patents mentioned above addresses the issues of insufficient environmental adaptability, weak engineering application capabilities, and lack of systematic optimization design methods for buffer energy-absorbing protection structures under complex operating conditions in nuclear facilities. Summary of the Invention

[0007] Based on the above-mentioned technical problems, this invention proposes an impact-resistant device and its construction method to solve the problems of insufficient environmental adaptability, weak engineering application capability, and lack of systematic optimization design methods of buffer energy absorption protection structures under complex operating conditions of nuclear facilities.

[0008] To achieve the above objectives, the present invention proposes an impact-resistant device.

[0009] An impact-resistant device includes an impact module. The impact module is fitted adjacent to the impact module to form the impact-resistant device. The impact module includes an impact panel, an energy-absorbing core layer, and a friction fixing panel. The friction fixing panel, the energy-absorbing core layer, and the impact panel are arranged sequentially from the inside to the outside along the facility to be protected in the impact module. The friction fixing panel, the energy-absorbing core layer, and the impact panel are fastened together by bolts to form the impact module.

[0010] Furthermore, the adjacent impact modules are configured to be interlocked.

[0011] Furthermore, the impact module also includes edge sealing, which is provided on four surfaces of the impact module adjacent to the impact panel, and adjacent impact modules are fastened together by the edge sealing.

[0012] Furthermore, the edge sealing includes a guide rail or a guide groove, and the guide rail and the guide groove on adjacent edge sealing are configured to fit together.

[0013] Furthermore, the edge sealing also includes edge sealing holes, which extend through the edge sealing along the arrangement direction of the impact panel, the energy-absorbing core layer, and the friction fixing panel. The edge sealing holes on adjacent edge sealings are correspondingly arranged to insert fixing rods to fix the adjacent impact modules.

[0014] Furthermore, the impact panel includes a ceramic composite coating, which is disposed on the outer surface of the impact panel.

[0015] Furthermore, the ceramic composite coating is made of zirconium oxide or yttrium-stabilized zirconium oxide.

[0016] Furthermore, the friction fixing panel includes a mortar layer, which is disposed on the surface of the friction fixing panel that contacts the facility to be protected.

[0017] Furthermore, the thickness of the mortar layer is 5mm-10mm.

[0018] Furthermore, the energy-absorbing core layer includes stepped holes that extend through the energy-absorbing core layer for mounting bolts.

[0019] Furthermore, the stepped hole includes a countersunk section and a through section, the countersunk section being disposed toward the impact panel and the through section being disposed toward the friction fixing panel.

[0020] Furthermore, the length of the countersunk hole section is 1 / 3 to 1 / 2 of the thickness of the energy-absorbing core layer, the diameter of the countersunk hole section is larger than that of the screw, and the diameter of the through hole section matches that of the screw.

[0021] Furthermore, the energy-absorbing core layer is made of porous metal material, the impact module is made of wear-resistant steel, and the friction fixing panel is made of carbon structural steel.

[0022] To achieve the above objectives, the present invention also proposes a method for constructing an impact-resistant device, comprising the following steps: S1: Collect design baseline events, conduct compression tests based on the design baseline events, and calibrate the verification model based on the compression test results. The verification model includes the model corresponding to the impact module. S2: Based on the design baseline event, a multi-objective genetic algorithm is used to optimize the verification model to obtain candidate solutions; S3: Set the impact condition, perform simulation verification on the candidate scheme based on the impact condition, and if the condition is met, manufacture the impact module according to the candidate scheme, and install the impact module in sequence on the outside of the device to be protected to construct the impact-resistant device.

[0023] Furthermore, step S3 also includes: constructing an environment model and determining whether the size parameters of the impact module meet the collision spacing of the environment model.

[0024] Furthermore, step S3 also includes: if the candidate solution does not meet the protective effectiveness after the impact condition, then repeat step S2 to calculate the candidate solution.

[0025] Furthermore, compression tests are conducted based on the design baseline events, including: conducting tests under simulated service conditions corresponding to multiple design baseline events based on the material of the energy-absorbing core layer, and constructing a material performance database based on the test results.

[0026] Furthermore, the verification model is calibrated based on the compression test results, including: constructing the verification model for simulation, and calibrating the parameters of the impact panel, the energy-absorbing core layer, and the friction-fixing panel in the verification model using data from the material performance database.

[0027] Furthermore, a multi-objective genetic algorithm is used to optimize the verification model to obtain candidate solutions, including: setting event parameters according to the design baseline event, setting response indicators as optimization objectives, performing iterative calculations on the verification model according to the multi-objective genetic algorithm, and obtaining a Pareto optimal solution set according to non-dominated sorting, wherein the Pareto optimal solution set includes multiple candidate solutions.

[0028] Furthermore, step S3 includes: determining the parameters of the sealing edge based on the parameters of the impact module in the candidate scheme.

[0029] Based on the above technical solution, the present invention has at least the following beneficial effects: 1. This invention proposes an impact-resistant device and its construction method. By combining multiple impact modules, a modular construction of the protective structure is achieved. This allows the overall structure to be flexibly assembled according to the shape and size of different protected areas, improving adaptability to irregularly shaped and large-scale areas, facilitating installation and partial replacement, and enhancing engineering efficiency and maintenance convenience. Each impact module contains an impact panel, an energy-absorbing core layer, and a friction-fixing panel, forming a layered structure from the outside in. This allows the impact load to be distributed step-by-step during transmission. The impact panel initially bears the impact, the energy-absorbing core layer absorbs the impact energy, and the friction-fixing panel transmits and disperses the remaining load, thereby achieving graded attenuation of the impact load and reducing the impact load transmitted to the protected facility. The construction method involves conducting compression tests based on design benchmark events and calibrating the verification model to enable it to reflect the response characteristics of the impact module under corresponding working conditions, thereby improving the reliability and relevance of subsequent design and analysis results. Optimization of the verification model using a multi-objective genetic algorithm yields multiple candidate schemes across various design parameter combinations, achieving a comprehensive balance between different performance indicators and thus improving the rationality of the structural design and its adaptability to different needs. Simulation verification of candidate schemes under set impact conditions allows for the evaluation of the response performance of each scheme, thereby selecting structural schemes that meet the requirements and preventing designs that do not meet performance requirements from entering the actual manufacturing stage, thus improving the accuracy and feasibility of the design results.

[0030] 2. This invention proposes an impact-resistant device and its construction method. By setting the impact modules as a fitable structure or connecting and securing them through edge sealing, precise positioning and fitting of guide rails / slots can be achieved between adjacent modules. Furthermore, secondary mechanical fastening is formed through edge sealing holes and fixing rods, thereby realizing modular splicing and reliable connection of the impact-resistant device. This ensures structural continuity and overall force transmission consistency among multiple impact modules, while improving assembly accuracy, installation efficiency, and the ease of disassembly for later maintenance. A stepped hole structure is set within the energy-absorbing core layer, employing a graded arrangement of countersunk and through-hole sections. This prevents the pre-tightening force of bolts during impact module installation from damaging the original structure of the core layer and affecting the actual impact resistance effect of the structure.

[0031] 3. This invention proposes an impact-resistant device and its construction method. The outer surface of the impact panel is coated with a ceramic composite coating composed of zirconium oxide or yttrium-stabilized zirconium oxide, giving the outer layer of the impact module good high-temperature resistance and environmental corrosion resistance. In addition, its high hardness and wear resistance are specifically designed to cope with the high-speed cutting and penetration of high-hardness fragments such as commercial aircraft engine blades, meeting the requirements of long-term reliability and safety of nuclear equipment. The contact surface between the friction fixing panel and the facility to be protected is provided with a cement-based mortar layer of a certain thickness, forming a fillable and levelable transition interface between the module and the facility to be protected, thereby improving contact fit and interface uniformity, reducing the risk of stress concentration caused by local gaps or unevenness, and also improving the stability and engineering adaptability of the structure after installation.

[0032] 4. This invention proposes an impact-resistant device and its construction method. By conducting compression tests on the energy-absorbing core material under simulated design benchmark events and constructing a material performance database, the calibrated simulation model can more accurately reflect the true mechanical response characteristics of the impact module, improving the model's prediction accuracy and engineering applicability. By constructing an environmental model and verifying the collision spacing of the impact module, the structural design can verify its spatial adaptability in advance under virtual environmental constraints. In this invention, the construction method triggers a multi-objective genetic algorithm to re-iterate when the candidate scheme does not meet the impact condition requirements, and obtains the Pareto optimal solution set based on non-dominated sorting, thereby realizing continuous optimization and dynamic correction of the design scheme, further improving the structural design's adaptability to complex impact conditions and the reliability of the results. Attached Figure Description

[0033] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 A schematic diagram of an impact module according to one embodiment is shown; Figure 2 A front view of an embodiment of an impact-resistant device is shown; Figure 3 A cross-sectional view of adjacent impact modules in one embodiment is shown; Figure 4 A three-dimensional schematic diagram of an adjacent impact module according to one embodiment is shown; Figure 5 A three-dimensional schematic diagram of an impact module according to one embodiment is shown; Figure 6 A cross-sectional view of an impact module according to another embodiment is shown; Figure 7 An exploded view of an impact module according to one embodiment is shown; Figure 8A schematic diagram of an energy-absorbing core layer of one embodiment is shown; Figure 9 A schematic diagram of the impact module fitting arrangement of one embodiment is shown.

[0034] The above figures include the following reference numerals: 1. Impact module; 2. Protective equipment to be installed; 3. Fixing rod; 1a. First impact module; 1b. Second impact module; 1c. Third impact module; 1d. Fourth impact module; 21. Concrete base layer; 11. Impact panel; 12. Energy-absorbing core layer; 13. Friction fixing panel; 14. Edge sealing; 15. Screw; 111. Ceramic composite coating; 121. Stepped hole; 1211. Countersunk hole section; 1212. Through hole section; 131. Mortar layer; 141. Guide rail; 142. Guide groove; 143. Sealing hole. Detailed Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] The present invention will be further described in detail below with reference to specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed by the present invention. The term "comprising" indicates the presence of a feature, but does not exclude the presence or addition of one or more other features. The terms "lateral," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the purpose of description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In this description, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0038] Example

[0039] This invention proposes an impact-resistant device and its construction method, such as... Figure 1 As shown, it includes an impact module 1, and multiple impact modules 1 are attached to each other to form the impact-resistant device. The impact module 1 includes an impact panel 11, an energy-absorbing core layer 12, and a friction fixing panel 13. The friction fixing panel 13, the energy-absorbing core layer 12, and the impact panel 11 are arranged sequentially from the inside to the outside along the facility to be protected in the impact module 1. The friction fixing panel 13, the energy-absorbing core layer 12, and the impact panel 11 are fastened together by bolts to form the impact module 1.

[0040] In this invention, "fittable configuration" refers to two or more mechanical components that can be connected together through a specific interface or mating surface design to form a complete structure or system. Such configuration requires that the shape, size and locking mechanism of the interface or mating surface between the components match.

[0041] Preferably, multiple adjacent impact modules 1 are fitted together to form the impact-resistant device. Figure 2 As shown, the device includes a first impact module 1a, a second impact module 1b, a third impact module 1c, and a fourth impact module 1d. These four impact modules 1 are interlocked. Since the strength of the energy-absorbing core layer 12 is less than that of the impact panel 11 and the friction fixing panel 13, the energy-absorbing core layer 12, used as an interlocking structure between different impact modules 1, may cause an increase in the relative displacement between the impact modules 1 when facing an impact, thus affecting the overall protective effect of the impact-resistant device. Therefore, a sealing edge 14 is provided on the circumferential adjacent surfaces of the impact modules 1. The material of the sealing edge 14 can be the same as that of the impact panel 11 or the friction fixing panel 13, or other non-metallic porous materials. The adjacent surfaces of the sealing edge 14 are fitted to the surfaces of different impact modules 1 and can be fixed to the adjacent surfaces of the impact modules 1 by welding or bolting. Adjacent impact modules 1 are interlocked through the sealing edge 14, combined with... Figure 2 and Figure 3 The first impact module 1a shown in the diagram has a guide rail 141 on the side adjacent to the second impact module 1b. Correspondingly, the second impact module 1b has a guide groove 142 on the side adjacent to the first impact module 1a. Figure 4 and Figure 5 As shown, the cross-section of the guide rail 141 is trapezoidal or arc-shaped, and the cross-section of the guide groove 142 is correspondingly arranged with the guide rail 141 to form a fitable structure, so that the first impact module 1a and the second impact module 1b are initially fixed together. Similarly, as shown... Figure 2As shown, the first impact module 1a and the third impact module 1c, the second impact module 1b and the fourth impact module 1d, and the fourth impact module 1d and the third impact module 1c are also fastened by the same structural method described above, which will not be repeated here.

[0042] Furthermore, in other embodiments, such as Figure 6 The adjacent surfaces of the impact module 1 shown may not have a sealing edge 14. Instead, the adjacent surfaces of the impact panel 11, the energy-absorbing core layer 12, and the friction fixing panel 13 together form a guide rail or guide groove with the same function as the sealing edge 14, so as to realize the direct fitting between different impact modules 1.

[0043] Furthermore, such as Figure 2 The sealing edge 14 shown is provided with sealing edge holes 143. The sealing edge holes 143 penetrate the sealing edge 14 along the arrangement direction of the impact panel 11, the energy-absorbing core layer 12 and the friction fixing panel 13. The sealing edge holes 143 on adjacent sealing edges 14 are correspondingly arranged. By inserting the fixing rod 3, the different impact modules 1 are further locked, which enhances the stability between the impact modules 1. The length of the fixing rod 3 is the same as the thickness of the impact panel 11.

[0044] Furthermore, such as Figure 7 The figure shown is an exploded view of the impact module 1, wherein the impact panel 11 includes a ceramic composite coating 111, which is disposed on the outer surface of the impact panel 11. The ceramic composite coating 111 is made of zirconium oxide or yttrium oxide stabilized zirconium oxide, which is used to prevent the impact panel 11 from being corroded by the environment and thus reduce the material strength, thereby enhancing the stability of the impact panel 11.

[0045] Specifically, in this embodiment, the mass fraction of yttrium oxide in the ceramic composite coating 111 is 6%. In other embodiments, it can be 5%, 7% or 8%, with the remainder being zirconium oxide. The ceramic composite coating 111 is formed on the outer surface of the impact panel 11 by plasma spraying, and the coating thickness is 100μm-120μm.

[0046] Furthermore, the friction fixing panel 13 includes a mortar layer 131, which is disposed on the surface of the friction fixing panel 13 that contacts the facility to be protected, such as... Figure 9 As shown, the surface of the facility to be protected 2 has a concrete base layer 21, and a mortar layer 131 is provided on the surface where the friction fixing panel 13 and the concrete base layer 21 are in contact. Preferably, the thickness of the mortar layer 131 is 8mm. In other embodiments, the thickness of the mortar layer can also be 5mm, 6mm, 7mm, 9mm and 10mm.

[0047] Furthermore, combined Figure 7 and Figure 8As shown, the energy-absorbing core layer 12 includes a stepped hole 121 that extends through the energy-absorbing core layer 12 for mounting bolts. The stepped hole 121 includes a countersunk section 1211 and a through section 1212. The countersunk section 1211 faces the impact panel 11, and the through section 1212 faces the friction fixing panel 13. Specifically, in this embodiment, the length of the countersunk section 1211 is 1 / 2 of the thickness of the energy-absorbing core layer 12. In other embodiments, the length of the countersunk section 1211 can be any length in the range of 1 / 3 to 1 / 2 of the thickness of the energy-absorbing core layer 12. The diameter of the countersunk section 1211 is larger than that of the screw 15, and the diameter of the through section 1212 matches that of the screw 15.

[0048] Furthermore, the energy-absorbing core layer 12 is made of porous metal material, the impact module 1 is made of wear-resistant steel, and the friction fixing panel 13 is made of carbon structural steel.

[0049] Specifically, the energy-absorbing core layer 12 can be made of closed-cell aluminum foam, the impact module 1 can be made of NM400 steel, and the friction fixing panel 13 can be made of Q235B steel.

[0050] To achieve the above objectives, the present invention also proposes a method for constructing an impact-resistant device, comprising the following steps: S1: Collect design baseline events, conduct compression tests based on the design baseline events, and calibrate the verification model based on the compression test results. The verification model includes the model corresponding to the impact module 1.

[0051] Furthermore, the design baseline events are representative severe threat scenarios faced by nuclear facilities, i.e., protected facilities, including at least: spent fuel tank drop characteristics: low speed, high kinetic energy, strong local concentrated force; commercial aircraft impact characteristics: high speed, large mass, overall impulse; internal / external chemical explosion characteristics: high frequency, high impulse, shock wave load. Accident conditions are set based on the above possible design baseline events.

[0052] Furthermore, compression tests are conducted based on the design baseline events, including: conducting tests on the energy-absorbing core layer 12 under simulated service conditions corresponding to multiple design baseline events based on the material, and constructing a material performance database based on the test results.

[0053] Specifically, compression tests are conducted on the material of the energy-absorbing core layer 12 under accident conditions corresponding to the design baseline event, ranging from 25℃ to 400℃. The compression test can be a drop hammer impact test or a near-field TNT explosion test to simulate the service environment and obtain performance data of different materials under the corresponding baseline event accident conditions. The performance data is then classified into a material performance database for verification.

[0054] Further, the verification model is calibrated based on the compression test results, including: constructing the verification model for simulation, and using data from the material performance database to calibrate the parameters of the impact panel 11, the energy-absorbing core layer 12, and the friction-fixing panel 13 in the verification model.

[0055] S2: Based on the design baseline event, a multi-objective genetic algorithm is used to optimize the verification model to obtain candidate solutions.

[0056] Furthermore, a multi-objective genetic algorithm is used to optimize the verification model to obtain candidate solutions, including: setting event parameters according to the design baseline event, setting response indicators as optimization objectives, performing iterative calculations on the verification model according to the multi-objective genetic algorithm, and obtaining a Pareto optimal solution set according to non-dominated sorting, wherein the Pareto optimal solution set includes multiple candidate solutions.

[0057] Specifically, the design baseline event is set as a spent fuel tank drop, with the corresponding accident conditions being: a rigid body with an equivalent mass of 5000 kg impacting it; an impact velocity of 90 m / s; and an impact direction perpendicular to the structural surface. The parameters of impact module 1 are initialized, with impact panel 11 having a thickness of 35 mm, energy-absorbing core layer 12 a thickness of 150 mm, and friction-fixing panel a thickness of 1330 mm. The response indices are set as maximum impact force, absorbed energy, and maximum equivalent structural stress. The optimization objective is to minimize these response indices. The parameters of impact module 1 are encoded as chromosome individuals. The multi-objective genetic algorithm parameters are set as follows: population size: 100; number of generations: 100; crossover probability: 0.8; mutation probability: 0.05. After optimization, multiple optimal solutions are obtained to construct a Pareto optimal solution set, where each optimal solution represents a candidate scheme. The Pareto optimal solution set in this application is shown in Table 1 below. Each row of solutions represents a candidate scheme.

[0058] Table 1. Identification of System Devices Performing Redundancy Functions During Incident Mitigation

[0059] S3: Set the impact condition, perform simulation verification on the candidate scheme based on the impact condition, and if the condition is met, manufacture the impact module 1 according to the candidate scheme, and install the impact module 1 in sequence on the outside of the device to be protected to construct the impact-resistant device.

[0060] Furthermore, step S3 also includes: constructing an environment model and determining whether the size parameters of the impact module 1 meet the collision spacing of the environment model.

[0061] Furthermore, an environmental model is constructed based on the structural data of the facility to be protected and the surrounding structural data. Dimensional parameters are set for the environmental model, and the impact module 1 is constructed as an impact-resistant device model in the environmental model. Collision detection is performed on the constructed model to determine the impact module 1 that is involved in a collision.

[0062] Furthermore, step S3 also includes: if the candidate solution does not meet the protective effectiveness after the impact condition, then repeat step S2 to calculate the candidate solution.

[0063] Further, step S3 includes: determining the parameters of the sealing edge 14 based on the parameters of the impact module 1 in the candidate scheme.

[0064] Furthermore, impact scenarios include commercial aircraft collisions and explosions.

[0065] In summary, as can be seen from the above description, the embodiments of the present invention achieve the following technical effects: 1. This invention proposes an impact-resistant device and its construction method. By combining multiple impact modules, a modular construction of the protective structure is achieved. This allows the overall structure to be flexibly assembled according to the shape and size of different protected areas, improving adaptability to irregularly shaped and large-scale areas, facilitating installation and partial replacement, and enhancing engineering efficiency and maintenance convenience. Each impact module contains an impact panel, an energy-absorbing core layer, and a friction-fixing panel, forming a layered structure from the outside in. This allows the impact load to be distributed step-by-step during transmission. The impact panel initially bears the impact, the energy-absorbing core layer absorbs the impact energy, and the friction-fixing panel transmits and disperses the remaining load, thereby achieving graded attenuation of the impact load and reducing the impact load transmitted to the protected facility. The construction method involves conducting compression tests based on design benchmark events and calibrating the verification model to enable it to reflect the response characteristics of the impact module under corresponding working conditions, thereby improving the reliability and relevance of subsequent design and analysis results. Optimization of the verification model using a multi-objective genetic algorithm yields multiple candidate schemes across various design parameter combinations, achieving a comprehensive balance between different performance indicators and thus improving the rationality of the structural design and its adaptability to different needs. Simulation verification of candidate schemes under set impact conditions allows for the evaluation of the response performance of each scheme, thereby selecting structural schemes that meet the requirements and preventing designs that do not meet performance requirements from entering the actual manufacturing stage, thus improving the accuracy and feasibility of the design results.

[0066] 2. This invention proposes an impact-resistant device and its construction method. By setting the impact modules as a fitable structure or connecting and securing them through edge sealing, precise positioning and fitting of guide rails / slots can be achieved between adjacent modules. Furthermore, secondary mechanical fastening is formed through edge sealing holes and fixing rods, thereby realizing modular splicing and reliable connection of the impact-resistant device. This ensures structural continuity and overall force transmission consistency among multiple impact modules, while improving assembly accuracy, installation efficiency, and the ease of disassembly for later maintenance. A stepped hole structure is set within the energy-absorbing core layer, employing a graded arrangement of countersunk and through-hole sections. This prevents the pre-tightening force of bolts during impact module installation from damaging the original structure of the core layer and affecting the actual impact resistance effect of the structure.

[0067] 3. This invention proposes an impact-resistant device and its construction method. The outer surface of the impact panel is coated with a ceramic composite coating composed of zirconium oxide or yttrium-stabilized zirconium oxide, giving the outer layer of the impact module good high-temperature resistance and environmental corrosion resistance. In addition, its high hardness and wear resistance are specifically designed to cope with the high-speed cutting and penetration of high-hardness fragments such as commercial aircraft engine blades, meeting the requirements of long-term reliability and safety of nuclear equipment. The contact surface between the friction fixing panel and the facility to be protected is provided with a cement-based mortar layer of a certain thickness, forming a fillable and levelable transition interface between the module and the facility to be protected, thereby improving contact fit and interface uniformity, reducing the risk of stress concentration caused by local gaps or unevenness, and also improving the stability and engineering adaptability of the structure after installation.

[0068] 4. This invention proposes an impact-resistant device and its construction method. By conducting compression tests on the energy-absorbing core material under simulated design benchmark events and constructing a material performance database, the calibrated simulation model can more accurately reflect the true mechanical response characteristics of the impact module, improving the model's prediction accuracy and engineering applicability. By constructing an environmental model and verifying the collision spacing of the impact module, the structural design can verify its spatial adaptability in advance under virtual environmental constraints. In this invention, the construction method triggers a multi-objective genetic algorithm to re-iterate when the candidate scheme does not meet the impact condition requirements, and obtains the Pareto optimal solution set based on non-dominated sorting, thereby realizing continuous optimization and dynamic correction of the design scheme, further improving the structural design's adaptability to complex impact conditions and the reliability of the results.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0070] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0071] It should be noted that, in the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. An impact-resistant device, disposed outside the facility to be protected, characterized in that, The impact module (1) is included. Multiple impact modules (1) are attached to each other to form the impact-resistant device. The impact module (1) includes an impact panel (11), an energy-absorbing core layer (12) and a friction fixing panel (13). The friction fixing panel (13), the energy-absorbing core layer (12) and the impact panel (11) are arranged sequentially from the inside to the outside along the facility to be protected in the impact module (1). The friction fixing panel (13), the energy-absorbing core layer (12) and the impact panel (11) are fastened together by bolts to form the impact module (1).

2. The apparatus according to claim 1, characterized in that, The adjacent impact modules (1) are configured to be interlocked.

3. The apparatus according to claim 2, characterized in that, The impact module (1) also includes an edge seal (14). The sealing edge (14) is provided on the four surfaces of the impact module (1) adjacent to the impact panel (11), and the adjacent impact modules (1) are fitted and fastened by the sealing edge (14).

4. The apparatus according to claim 3, characterized in that, The edge sealing (14) includes a guide rail (141) or a guide groove (142). The guide rail (141) and the guide groove (142) on the adjacent sealing edge (14) are fitted together.

5. The apparatus according to claim 3, characterized in that, The edge sealing (14) also includes edge sealing holes (143). The sealing hole (143) extends through the sealing edge (14) along the arrangement direction of the impact panel (11), the energy-absorbing core layer (12) and the friction fixing panel (13). The sealing holes (143) on adjacent sealing edges (14) are correspondingly arranged to insert fixing rods to fix the adjacent impact module (1).

6. The apparatus according to claim 1, characterized in that, The impact panel (11) includes a ceramic composite coating (111). The ceramic composite coating (111) is applied to the outer surface of the impact panel (11).

7. The apparatus according to claim 6, characterized in that, The ceramic composite coating (111) is made of zirconium oxide or yttrium-stabilized zirconium oxide.

8. The apparatus according to claim 1, characterized in that, The friction fixing panel (13) includes a mortar layer (131). The mortar layer (131) is provided on the surface of the friction fixing panel (13) that is in contact with the facility to be protected.

9. The apparatus according to claim 8, characterized in that, The thickness of the mortar layer (131) is 5mm-10mm.

10. The apparatus according to claim 1, characterized in that, The energy-absorbing core layer (12) includes a stepped hole (121) that extends through the energy-absorbing core layer (12) and is used for mounting bolts.

11. The apparatus according to claim 10, characterized in that, The stepped hole (121) includes a countersunk section (1211) and a through section (1212). The countersunk hole section (1211) is disposed toward the impact panel (11), and the through hole section (1212) is disposed toward the friction fixing panel (13).

12. The apparatus according to claim 11, characterized in that, The length of the countersunk section (1211) is 1 / 3 to 1 / 2 of the thickness of the energy-absorbing core layer (12), the diameter of the countersunk section (1211) is larger than that of the screw, and the diameter of the through section (1212) matches that of the screw.

13. The apparatus according to claim 1, characterized in that, The energy-absorbing core layer (12) is made of porous metal material, the impact module (1) is made of wear-resistant steel, and the friction fixing panel (13) is made of carbon structural steel.

14. A method for constructing an impact-resistant device based on any one of claims 1-11, characterized in that, include: S1: Collect design benchmark events, conduct compression tests based on the design benchmark events, calibrate the verification model based on the compression test results, and the verification model includes the model corresponding to the impact module (1); S2: Based on the design baseline event, a multi-objective genetic algorithm is used to optimize the verification model to obtain candidate solutions; S3: Set the impact condition, perform simulation verification on the candidate scheme based on the impact condition, and if the condition is met, manufacture the impact module (1) according to the candidate scheme, and install the impact module (1) in sequence on the outside of the device to be protected to construct the impact-resistant device.

15. The method according to claim 14, characterized in that, Step S3 further includes: Construct an environment model and determine whether the size parameters of the impact module (1) meet the collision spacing of the environment model.

16. The method according to claim 14, characterized in that, Step S3 further includes: If the candidate solution does not meet the protection effectiveness after the impact condition, repeat step S2 above to calculate the candidate solution.

17. The method according to claim 14, characterized in that, Compression tests were conducted based on the design baseline event, including: The material of the energy-absorbing core layer (12) is tested under simulated service conditions corresponding to multiple design baseline events, and a material performance database is constructed based on the test results.

18. The method according to claim 17, characterized in that, The validation model was calibrated based on the compression test results, including: The verification model for simulation is constructed, and the data in the material performance database are used to calibrate the parameters of the impact panel (11), the energy-absorbing core layer (12) and the friction-fixing panel (13) in the verification model.

19. The method according to claim 14, characterized in that, A multi-objective genetic algorithm is used to optimize the validation model to obtain candidate solutions, including: Event parameters are set according to the design baseline event, response indicators are set as optimization objectives, the verification model is iteratively calculated according to the multi-objective genetic algorithm, and Pareto optimal solution set is obtained according to non-dominated sorting. The Pareto optimal solution set includes multiple candidate solutions.

20. The method according to claim 14, characterized in that, Step S3 includes: The parameters of the sealing edge (14) are determined based on the parameters of the impact module (1) in the candidate scheme.

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