A comprehensive type ray protection device and a mechanical comprehensive performance simulation analysis method thereof
By designing a comprehensive radiation protection device, using radiation-proof acrylic plates and lead plates, combined with a high-strength aluminum alloy support frame, the problems of cumulative radiation damage and weight burden of traditional radiation protection equipment are solved, achieving low-cost and efficient radiation protection and simulation analysis.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANGHAI UNIV OF ENG SCI
- Filing Date
- 2026-02-11
- Publication Date
- 2026-06-05
AI Technical Summary
Traditional radiation protection equipment poses problems such as long-term cumulative radiation damage and weight burden on medical personnel, and the materials are easily damaged, resulting in high usage costs.
A comprehensive radiation protection device is designed, which uses radiation-proof acrylic plates and lead plates, combined with a high-strength aluminum alloy support frame. The material parameters and contact relationships are optimized through finite element simulation analysis to improve the convergence of the simulation analysis.
This reduces the radiation dose to medical personnel, prevents occupational diseases, reduces weight burden, and improves ease of use and accuracy of simulation analysis.
Smart Images
Figure CN122140276A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of medical protective equipment, specifically relating to a comprehensive radiation protection device and its mechanical performance simulation analysis method. Background Technology
[0002] Image-guided interventional surgeries, puncture surgeries, orthopedic surgeries, and valve surgeries require the use of imaging equipment such as X-rays and CT scans to generate real-time images of the lesion and surrounding tissues for precise positioning and manipulation. A certain dose of radiation is generated during these procedures. Common radiation protection measures for doctors include placing a suspended protective screen between the doctor and the radiation source during surgery, and the doctor wearing a lead apron, lead cap, and thyroid protective lead neck brace, among other personal protective equipment.
[0003] However, traditional protective measures have the following problems: First, even if doctors perform surgery under the protection of the aforementioned measures, the cumulative long-term radiation dose can still harm the health of medical personnel and cause adverse consequences. Second, protective equipment such as lead aprons and lead caps are heavy, adding an extra burden, and long-term use can lead to occupational diseases affecting doctors' muscles and bones. Third, the protective ability of lead aprons and lead caps comes from lead-rubber composite materials, which cannot withstand folding and heavy pressure; otherwise, they will break, significantly reducing their protective ability. Therefore, replacing lead aprons and lead caps would greatly increase the cost of use.
[0004] Therefore, comprehensive radiation protection devices are crucial for medical personnel. Compared with traditional protection methods, they can significantly reduce the radiation dose received by medical personnel, and they also do not impose any additional weight burden on doctors, offering greater reliability and convenience.
[0005] In the design of comprehensive radiation protection devices (hereinafter referred to as protection devices), radiation-shielding acrylic panels are installed at the front and sides to ensure that doctors have a normal field of vision during surgery. These radiation-shielding acrylic panels contain a certain amount of lead, and therefore possess a degree of brittleness. To understand whether, under normal installation conditions and when doctors use and move the protection device during surgery, the radiation-shielding acrylic panels will withstand external forces exceeding their ultimate load capacity, leading to structural failure, numerical simulations are needed to assist in the structural design.
[0006] Currently, a common solution to the above problems is to perform finite element simulation. This method has advantages over physical experiments using physical objects, such as lower cost, time saving, and simpler data acquisition. However, since both the radiation-shielding acrylic sheet and the radiation-shielding rubber sheet contain a certain amount of lead, their material parameters are inconsistent with those of common radiation-shielding acrylic sheets and rubber sheets. Therefore, their constitutive models need to be redefined. In addition, during finite element simulation analysis, large deformation of the rubber sheet and the stress of multiple material combinations can easily lead to non-convergence in the calculation results of contact stiffness and stress. Considering the special material and structural conditions of this device, some optimizations or specifications need to be made to the common stress simulation steps to obtain continuous and realistic stress distribution and deformation during the simulation loading process, thereby improving the convergence of the simulation analysis. Summary of the Invention
[0007] To address the shortcomings of existing technologies, this invention provides a comprehensive radiation protection device and its mechanical performance simulation analysis method.
[0008] A comprehensive radiation protection device is designed to significantly reduce the ionizing radiation dose received by doctors during surgery, preventing occupational diseases of muscles and bones caused by the use of lead aprons, and improving the safety and convenience of surgical procedures. This protective device offers excellent radiation protection, is easily movable, and its operating position can be freely raised and lowered for easy adjustment, making it suitable for doctors of different heights to perform surgical procedures.
[0009] A simulation analysis method for a comprehensive radiation protection device is proposed to facilitate the study of the stress state of the radiation-shielding acrylic plate of the device under pre-load conditions. Considering the special material and structural conditions of the device, some optimizations or specifications are made on the basis of common finite element analysis steps to obtain continuous and realistic stress distribution and deformation during the simulation loading process, thereby improving the convergence of the simulation analysis.
[0010] To achieve the above objectives, the present invention provides the following technical solution: A comprehensive radiation protection device includes a radiation-shielding acrylic panel, a support frame, a radiation-shielding door, a radiation-shielding curtain, a radiation-shielding sleeve, radiation-shielding rubber, and a lead plate. The support frame is composed of high-strength aluminum alloy profiles along the edges of the protection device, two profiles fixed at the top edge of the protection device, and a profile in the middle of the protection device. The profile in the middle cooperates with the fixing strip of the radiation-shielding acrylic panel to fix the radiation-shielding acrylic panel. The two profiles fixed at the top edge of the top plane are used to improve the stability of the support frame. The upper surface of the profile in the middle position is fixed to the lower surface of the fixing strip of the radiation-shielding acrylic panel. A groove is opened above the fixing strip of the radiation-shielding acrylic panel for inserting the radiation-shielding rubber and the radiation-shielding acrylic panel. The profile in the middle position is located between the radiation-shielding acrylic panel and the lead plate. The radiation-shielding acrylic panel is separated from the support frame by the radiation-shielding rubber.
[0011] A comprehensive mechanical performance simulation analysis method for a full-scale radiation protection device is provided. This method utilizes the aforementioned full-scale radiation protection device to simulate the continuous and realistic stress distribution and deformation of the support frame, radiation-shielding acrylic plate, and radiation-shielding rubber sheet during the loading process, thereby improving the convergence of the simulation analysis. The method includes the following steps: The first step is to create 3D models of the support frame, radiation-proof acrylic sheet, and radiation-proof rubber sheet in CAD software based on the geometric dimensions. After the modeling is completed, import the complete model into ANSYS Workbench. The second step is to define the material properties of the support frame, the radiation-shielding acrylic sheet, and the radiation-shielding rubber sheet. Specifically, a linear elastic constitutive model is used to represent the support frame; a hyperelastic constitutive model is used to represent the radiation-shielding rubber sheet; and a linear elastic material parameter model is used to represent the radiation-shielding acrylic sheet. Parameters such as density, elastic modulus, and Poisson's ratio of each material are set. The third step involves sequentially performing mesh generation, setting loads and boundary conditions, setting and calculating the solution, extracting results, and determining reliability. The fourth step is to verify the mesh independence and evaluate the stability and strength of the simulation analysis results from the third step.
[0012] Preferably, in the second step, the support frame is made of aluminum alloy, and a linear elastic constitutive model is defined for the support frame in ANSYS Workbench software; the density, elastic modulus, Poisson's ratio, etc. of the aluminum alloy material are queried and defined in the software; the density, elastic modulus, Poisson's ratio, etc. of the radiation-shielding rubber and radiation-shielding acrylic sheet are defined in the software, and the hyperelastic constitutive model expression is as follows: W=C 10 (I1 3)+kC 01 (I2 3); Where W is the strain energy density; I1 and I2 are the first and second principal invariants of the right Cauchy-Green tensor; C 10 and C 01 is the Mooney-Rivlin constant; k is a custom correction amount for lead-containing rubber parameters, specifically determined experimentally; The parameter model for linear elastic materials is as follows: Where σ is the stress of the lead-containing radiation shielding acrylic sheet; k1 is a custom parameter correction amount for the lead-containing radiation shielding acrylic sheet, specifically obtained by experimental measurement; E is the elastic modulus of ordinary radiation shielding acrylic sheet; and ε is the strain of the lead-containing radiation shielding acrylic sheet.
[0013] Preferably, in the second step, it is also necessary to set the contact and connection relationships for the modeled support frame, radiation-proof acrylic plate, and radiation-proof rubber.
[0014] Furthermore, the contact and connection relationships are set up in the following manner: Surface-to-surface contact pairs are established between the radiation-shielding acrylic sheet and the radiation-shielding rubber sheet, and between the support frame and the radiation-shielding rubber sheet. The normal behavior of the above contacts is defined as hard contact, allowing separation. The tangential behavior of the above contacts is defined as frictional contact. The friction coefficient is set according to the material pairing and is measured through specific experiments. The support frame is composed of several aluminum profiles. The joint surface of adjacent profiles is defined as frictional contact in the software. Spring units are created at the bolt connection points between the profiles to simulate the semi-rigid characteristics of the connection. The friction coefficient of the above frictional contact is measured through specific experiments. The translational and rotational stiffness of the above spring units need to be estimated based on the mechanical properties of the connectors.
[0015] Preferably, in the third step, the grid is divided in the following manner: The software defines linear reduced integral elements for the metal material, hyperelastic elements for the radiation-proof rubber, and reduced integral elements for the radiation-proof acrylic sheet. A high-precision stress simulation model is generated using a meshing strategy that combines tetrahedral and hexahedral elements. The mesh size, number of nodes, and number of elements are first set using empirical values, and the final values are determined by comprehensively considering the calculation accuracy and efficiency during the first step of mesh convergence judgment. Local mesh refinement is required in the contact area, the area where boundary conditions are applied, and the expected high stress gradient area.
[0016] Preferably, in the third step, the load and boundary conditions are set as follows: during the simulation analysis, a pre-compression amount of 0 to 1 mm is applied to the upper part of the support frame to replace the pre-tightening force of the bolts, with an interval of 0.1 mm, to analyze the load-bearing deformation and stress of the radiation-shielding acrylic plate under different compression amounts; gravitational acceleration is applied to the stress simulation model as a whole. According to the actual installation situation, the freedom of the support frame is constrained; the freedom of the radiation-proof acrylic plate is constrained by the pre-tightened bolt connection and the frictional contact between the radiation-proof rubber and the support frame, and no separate freedom constraint is set.
[0017] A computing device includes a processor and a memory for storing a processor-executable program, wherein when the processor executes the program stored in the memory, it performs the steps of the method described above.
[0018] A storage medium storing a program / instructions that, when executed by a processor, implement the steps of the method described above.
[0019] A computer program product includes a computer program / instructions that, when executed by a processor, implement the steps of the method described above.
[0020] Compared with the prior art, the beneficial effects of the present invention are: 1. The comprehensive radiation protection device of this invention has a simple structure, is easy to operate, and is convenient to produce and maintain. Its hand extension platform can be raised and lowered freely, making it easy for doctors of different heights to use; compared with traditional lead aprons, it has excellent ergonomics and protective effect.
[0021] 2. To facilitate the study of the stress state of the radiation-shielding acrylic plate of the protective device in this invention under preload or random load conditions, based on the common mechanical comprehensive performance simulation steps, optimizations or specifications were made for the special material and structural conditions of this device. This resulted in a continuous and realistic stress distribution and deformation during the simulation loading process, improving the convergence of the simulation analysis. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the simulation analysis process for the protective device of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a schematic diagram of the installation of the anti-radiation sleeve in this invention; Figure 4 This is a schematic diagram of the installation of the radiation-shielding acrylic sheet in this invention; Figure 5 This is a schematic diagram of the installation of the radiation-shielding acrylic sheet from another perspective in this invention; In the picture: 1. Anti-radiation acrylic sheet; 2. Support frame; 3. Anti-radiation door; 4. Anti-radiation curtain; 5. Anti-radiation sleeve; 6. Anti-radiation rubber sheet; 7. Lead plate. Detailed Implementation
[0023] To make the technical means, creative features, objectives and effects of this invention easier to understand, the following embodiments are described in detail with reference to the accompanying drawings. It should be noted that the description of these embodiments is for the purpose of helping to understand this invention, but does not constitute a limitation of this invention.
[0024] like Figure 1-5 As shown, a comprehensive radiation protection device includes a radiation-proof acrylic plate 1, a support frame 2, a radiation-proof door 3, a radiation-proof curtain 4, a radiation-proof sleeve 5, a radiation-proof rubber sheet 6, and a lead plate 7.
[0025] The bottom of the support frame 2 is equipped with casters for easy movement of the protective device. The radiation shielding door 3 is used for surgical personnel to enter the interior. The position where the surgical personnel can extend their hands is defined as the front, and the position where the personnel enter is defined as the rear. With the person standing facing forward, the left side is defined as the left side, the right side is defined as the right side, and the side above the head is defined as the top edge of the support frame 2.
[0026] In front of the protective device, a radiation-proof acrylic plate 1 and a lead plate 7 are installed respectively. The radiation-proof acrylic plate 1 has a hole for a hand to extend out. Behind the protective device, a radiation-proof door 3 is installed for personnel to enter and exit; Radiation-proof acrylic plate 1 and lead plate 7 are installed on the left and right sides of the protective device, respectively.
[0027] The support frame 2 is composed of high-strength aluminum alloy profiles with 12 edges of the protective device, two profiles fixed at the top edge of the protective device, and a profile in the middle of the protective device. The profile in the middle cooperates with the anti-radiation acrylic plate fixing strip to fix the anti-radiation acrylic plate 1. The two profiles fixed on the top plane are used to improve the stability of the support frame 2. The upper surface of the two profiles fixed at the top edge is flush with the upper surface of the protective device, and the upper surface of the profile in the middle is fixed to the lower surface of the anti-radiation acrylic plate fixing strip. A groove is opened above the anti-radiation acrylic plate fixing strip for inserting the anti-radiation rubber 6 and the anti-radiation acrylic plate 1. The profile in the middle is located between the anti-radiation acrylic plate 1 and the lead plate 7, and the specific position is not limited. The radiation-proof acrylic sheet 1 is separated from the support frame 2 by radiation-proof rubber sheet 6 around its perimeter; For the radiation-proof acrylic sheet 1, when it is placed vertically, the upper plane is called the upper bottom surface, the lower plane is called the lower bottom surface, and the left and right sides are called the left and right sides respectively (the distinction between left and right is not strict). Since the radiation-proof acrylic sheet 1 has radiation-proof rubber 6 around its perimeter, it is connected to the support frame 2 through gaps or interference fits. The left and right sides are connected through gaps, and the upper and lower bottom surfaces are connected through interference fits, which bear the preload force brought by the support frame 2.
[0028] A simulation analysis method for the comprehensive mechanical performance of the aforementioned full-scale radiation protection device is provided. This method utilizes the full-scale radiation protection device described above to simulate the continuous and realistic stress distribution and deformation of the support frame, radiation-shielding acrylic plate, and radiation-shielding rubber sheet during the loading process, thereby improving the convergence of the simulation analysis. The method includes the following steps: The first step is to create 3D models of the support frame, radiation-shielding acrylic sheet, and radiation-shielding rubber sheet in CAD software based on their geometric dimensions. These 3D models, created using CAD software, represent the geometric features of these components. During modeling, features such as chamfers, fillets, and small holes that do not affect the overall stiffness and load transfer of the support frame are ignored. The profiles of each part of the support frame are kept independent during modeling, and Boolean merging operations are not performed to facilitate the subsequent definition of connection properties. After modeling is complete, the entire model is imported into ANSYS Workbench. The second step involves defining the material properties and setting the contact and connection relationships for the modeled support frame, radiation-shielding acrylic plate, and radiation-shielding rubber sheet. The material properties are defined as follows: a linear elastic constitutive model is used to represent the aluminum alloy support frame, defining the density, elastic modulus, and Poisson's ratio of the aluminum alloy material; a hyperelastic constitutive model is used to represent the radiation-shielding rubber sheet, defining its density, elastic modulus, and Poisson's ratio. These material parameters are determined through specific experiments. Specifically, the hyperelastic constitutive model expression is as follows: W=C 10 (I1 3)+kC 01 (I2 3); Where W is the strain energy density; I1 and I2 are the first and second principal invariants of the right Cauchy-Green tensor; C 10 and C 01 is the Mooney-Rivlin constant; k is a custom correction amount for lead-containing rubber parameters, specifically determined experimentally; A linear elastic material parameter model is used to represent the radiation-shielding acrylic sheet, specifying its density, elastic modulus, and Poisson's ratio. These material parameters were determined through specific experiments. The linear elastic material parameter model is as follows: Where σ is the stress of the lead-containing radiation shielding acrylic sheet; k1 is a custom parameter correction amount for the lead-containing radiation shielding acrylic sheet, specifically obtained from experiments; E is the elastic modulus of a regular radiation shielding acrylic sheet; and ε is the strain of the lead-containing radiation shielding acrylic sheet. The contact and connection relationships are set as follows: Surface-to-surface contact pairs are established between the radiation-shielding acrylic sheet and the radiation-shielding rubber sheet, and between the support frame and the radiation-shielding rubber sheet; the normal behavior of the above contacts is defined as hard contact, allowing separation; the tangential behavior of the above contacts is defined as frictional contact, and the friction coefficient is set according to the material pairing, which is measured through specific experiments; the support frame is composed of several aluminum profiles, and the joint surface of adjacent profiles is defined as frictional contact in the software; spring units are created at the bolt connection points between the profiles to simulate the semi-rigid characteristics of the connection; the friction coefficient of the above frictional contact is measured through specific experiments, and the translational and rotational stiffness of the above spring units needs to be estimated based on the mechanical properties of the connectors; The third step involves sequentially performing mesh generation, setting loads and applying boundary conditions, setting and calculating the solution, extracting results, and determining reliability. Among them, (1) the grid is divided in the following manner: The software defines linear reduced integral elements for the metal material, hyperelastic elements for the radiation-proof rubber, and reduced integral elements for the radiation-proof acrylic plate. A high-precision stress simulation model is generated using a meshing strategy that combines tetrahedral and hexahedral elements. The mesh size, number of nodes, and number of elements are initially set based on empirical values, and the final values are determined by considering both computational accuracy and efficiency when judging mesh convergence in step four. Local mesh refinement is required in the contact area, the area where boundary conditions are applied, and the expected high stress gradient area. Among them, (2) the load and boundary conditions are set in the following manner: during the simulation analysis, a pre-compression amount of 0 to 1 mm is applied to the upper part of the support frame to replace the pre-tightening force of the bolts. The load deformation and stress of the radiation shielding acrylic plate under different compression amounts are analyzed at intervals of 0.1 mm. Gravitational acceleration is applied to the stress simulation model as a whole. The above settings are completed in the following solution settings and simulation calculation steps. According to the actual installation situation, the freedom of the support frame is constrained; the freedom of the radiation-proof acrylic plate is constrained by the pre-tightened bolt connection and the frictional contact between the radiation-proof rubber and the support frame, and no separate freedom constraint is set.
[0029] Among them, (3) the solution setup and simulation calculation are performed in the following manner, In the software, set the analysis type to static analysis, enable the large deformation option for the geometric nonlinearity of the radiation shielding rubber, enable the material nonlinearity option for the hyperelastic model of the radiation shielding rubber, and enable the state nonlinearity option for the friction contact pair. Select an implicit solver based on the Newton-Raphson iteration method; load step settings: divided into two load steps. The first step is to apply the pre-compression amount described in (2) to the upper part of the support frame through forced displacement constraint to simulate the assembly clamping process, so that the radiation shielding rubber is compressed and a stable contact and pre-stress state is established; the second step is to convert the forced displacement constraint applied in the first step into a locking state to fix the pre-tightening effect; on this basis, gravity is applied to the entire protective device; Enable automatic time stepping, and set sufficient initial, minimum, and maximum substeps based on experience to ensure smooth convergence of the solution; adopt a dual convergence criterion based on force residuals and displacement corrections, maintaining the default tolerance or adjusting it according to accuracy requirements; Among them, (4) the results are extracted in the following manner: Visualize the total deformation cloud map of the radiation-proof acrylic sheet and record the maximum deformation and its location; Visualize the equivalent stress cloud map of the radiation shielding acrylic sheet and the buffer pad layer, and record the maximum stress value and distribution; Extract the contact pressure distribution cloud map of the contact surface to assess the pressure uniformity and whether separation exists; Among them, (5) the reliability of the solution results shall be judged in the following manner: In the software, the residual curve shows a monotonically or oscillating decrease as the number of iterations increases, and eventually falls below the reference line representing the convergence criterion, indicating that the solution has converged. Observe the displacement cloud diagram. The deformation should be continuous and smooth, and conform to the deformation and stress distribution law of the object under load. The radiation shielding acrylic plate under uniform pre-tightening should show overall translation or smooth bending. There should be no abrupt, discontinuous twisting or folding. Otherwise, it indicates that the solution result does not converge. High-stress areas should appear along load paths and at structural weak points, such as around screw holes, at abrupt changes in cross-section, and at contact edges. The stress distribution should have a smooth transition and should not have isolated, checkerboard-shaped stress spots; otherwise, it indicates that the solution results do not converge. When the above results fail to converge, the solution should be reset by significantly increasing the number of initial substeps and allowing for smaller minimum substeps, refining the mesh in the contact area, and checking previous steps.
[0030] The fourth step involves verifying the mesh independence and evaluating the stability and strength of the dynamic load simulation results from the third step; specifically: (1) Mesh independence verification: Three meshes with different precisions were established: basic mesh, fine mesh, and high precision mesh; the maximum deformation u in the thickness direction of the radiation shielding acrylic plate extracted in step 3 (4) was used to evaluate the mesh convergence; the mesh convergence index was calculated and defined as: a = (u2 - u1) / u2; b = (u3 - u2) / u3; Where u1 is the basic mesh analysis result, u2 is the fine mesh analysis result, and u3 is the high-precision mesh analysis result; a is the relative error from the basic mesh to the fine mesh analysis result, and b is the relative error from the fine mesh to the high-precision mesh analysis result; When a and b have the same sign and |a|>|b|, it indicates that the mesh has a convergence trend. Define x as the preset mesh irrelevance judgment threshold. When |a|>x>|b|, the mesh division is irrelevant, that is, the mesh division density meets the requirements and the analysis results are reliable. Otherwise, the mesh needs to be further refined.
[0031] (2) Stability and strength assessment: Check the deformation cloud diagram to confirm the absence of abrupt changes, buckling, or discontinuous deformation modes to determine the stability of the protective device. The stability is judged by the stability safety margin value, which is the ratio of the theoretical critical yield load to the current total working load. This safety margin should be greater than 2; otherwise, the design should be optimized. Compare the maximum equivalent stress of the radiation-shielding acrylic sheet with its allowable stress; compare the maximum principal stress of the radiation-shielding rubber sheet with its allowable stress. If the maximum value is significantly less than the allowable value, the design is reasonable; otherwise, the installation structure of the radiation-shielding acrylic sheet needs to be optimized.
[0032] A computing device includes a processor and a memory for storing a processor-executable program, wherein when the processor executes the program stored in the memory, it performs the steps of the method described above.
[0033] A storage medium storing a program / instructions that, when executed by a processor, implement the steps of the method described above.
[0034] A computer program product includes a computer program / instructions that, when executed by a processor, implement the steps of the method described above.
[0035] The above embodiments are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Various modifications or variations that can be made by those skilled in the art without creative effort within the scope of the appended claims are still within the scope of protection of this patent.
Claims
1. A comprehensive radiation protection device, characterized in that, The device includes a radiation-proof acrylic sheet, a support frame, a radiation-proof door, a radiation-proof curtain, a radiation-proof sleeve, radiation-proof rubber, and a lead plate. The support frame is composed of high-strength aluminum alloy profiles along the edges of the protective device, two profiles fixed at the top edge of the protective device, and a profile in the middle of the protective device. The profile in the middle cooperates with the fixing strip of the radiation-proof acrylic sheet to fix the radiation-proof acrylic sheet. The two profiles fixed at the top edge of the protective device are used to improve the stability of the support frame. The upper surface of the profile in the middle position is fixed to the lower surface of the fixing strip of the radiation-proof acrylic sheet. A groove is opened above the fixing strip of the radiation-proof acrylic sheet for inserting the radiation-proof rubber and the radiation-proof acrylic sheet. The profile in the middle position is located between the radiation-proof acrylic sheet and the lead plate. The radiation-proof acrylic sheet is separated from the support frame by the radiation-proof rubber.
2. A method for simulation analysis of the comprehensive mechanical performance of a full-scale radiation protection device, implemented using the full-scale radiation protection device as described in claim 1, characterized in that... This simulation analysis method is used to simulate the continuous and realistic stress distribution and deformation of the support frame, radiation-shielding acrylic plate, and radiation-shielding rubber during the loading process, thereby improving the convergence of the simulation analysis. It includes the following steps: The first step is to perform stress simulation on the support frame, radiation-proof acrylic sheet, and radiation-proof rubber sheet based on geometric dimensions and material properties; The second step is to define the material properties of the modeled support frame, radiation-shielding acrylic sheet, and radiation-shielding rubber sheet. Specifically, a linear elastic constitutive model is used to express the support frame, setting its elastic modulus, Poisson's ratio, and density; a hyperelastic constitutive model is used to express the radiation-shielding rubber sheet; and a linear elastic material parameter model is used to express the radiation-shielding acrylic sheet, setting its elastic modulus, Poisson's ratio, and density. The third step involves sequentially performing mesh generation, setting loads and boundary conditions, and dynamic load simulation analysis. The fourth step is to analyze and verify the convergence of the results of the dynamic load simulation analysis in the third step.
3. The method for simulation analysis of the comprehensive mechanical performance of a full-range radiation protection device according to claim 2, characterized in that: In the second step, the support frame is made of aluminum alloy, and is defined as a linear elastic constitutive model. The density, elastic modulus, and Poisson's ratio of the aluminum alloy are queried. The density, elastic modulus, and Poisson's ratio of the radiation-shielding rubber and the radiation-shielding acrylic sheet are defined. The hyperelastic constitutive model expression is as follows: W=C 10 (I1 3)+kC 01 (I2 3); Where W is the strain energy density; I1 and I2 are the first and second principal invariants of the right Cauchy-Green tensor; C 10 and C 01 is the Mooney-Rivlin constant; k is a custom correction amount for lead-containing rubber parameters; The parameter model for linear elastic materials is as follows: Where σ is the stress of the lead-containing radiation shielding acrylic sheet; k1 is the custom parameter correction amount for the lead-containing radiation shielding acrylic sheet; E is the elastic modulus of the ordinary radiation shielding acrylic sheet; and ε is the strain of the lead-containing radiation shielding acrylic sheet.
4. The simulation analysis method for a comprehensive radiation protection device according to claim 3, characterized in that: In the second step, it is also necessary to set the contact and connection relationships for the modeled support frame, radiation-proof acrylic plate, and radiation-proof rubber.
5. The method for simulation analysis of the comprehensive mechanical performance of a full-range radiation protection device according to claim 4, characterized in that: In the third step, the grid is divided as follows: The software defines linear reduced integral elements for the metal material, hyperelastic elements for the radiation-proof rubber, and reduced integral elements for the radiation-proof acrylic sheet. A high-precision stress simulation model is generated using a meshing strategy that combines tetrahedral and hexahedral elements. The mesh size, number of nodes, and number of elements are first set based on empirical values, and the final values are determined by comprehensively considering the calculation accuracy and efficiency during the mesh convergence judgment in the fourth step. Local mesh refinement is required in the contact area, the area where boundary conditions are applied, and the expected high stress gradient area.
6. The method for simulation analysis of the comprehensive mechanical performance of a full-range radiation protection device according to claim 5, characterized in that: In the third step, the load and boundary conditions are set as follows: During the simulation analysis, a pre-compression amount of 0 to 1 mm is applied to the upper surface of the support frame to replace the pre-tightening force of the bolts. The load-bearing deformation and stress of the radiation-shielding acrylic plate are analyzed at intervals of 0.1 mm. Gravitational acceleration is applied to the stress simulation model as a whole. According to the actual installation situation, the freedom of the support frame is constrained; the freedom of the radiation-proof acrylic plate is constrained by the pre-tightened bolt connection and the frictional contact between the radiation-proof rubber and the support frame, and no separate freedom constraint is set.
7. A computing device, characterized in that, It includes a processor and a memory for storing a processor-executable program, wherein when the processor executes the program stored in the memory, it implements the steps of the method as described in any one of claims 1 to 6.
8. A storage medium storing a program / instructions, characterized in that, When the program / instructions are executed by the processor, they implement the steps of the method as described in any one of claims 1 to 6.
9. A computer program product, comprising a computer program / instructions, characterized in that... When the computer program / instructions are executed by the processor, they implement the steps of the method according to any one of claims 1-6.