Rapid evaluation method and device for fixed connection of nuclear engineering equipment

Abstract

The invention discloses a method and a device for quickly evaluating fixed connection of nuclear engineering equipment. The method comprises the following steps: acquiring a calculated load at a fixed connection part of the nuclear engineering equipment; obtaining specifications and fixed connection forms adopted during fixed connection evaluation of the nuclear engineering equipment; acquiring specific parameters of the adopted fixed connection form; calculating a stress calculation value of the adopted fixed connection form under the specific parameters and the calculation load condition according to the adopted specification, and comparing the stress calculation value with a stress allowable value specified in the adopted specification to obtain an evaluation result; and generating a standardized nuclear engineering equipment fixed connection evaluation report according to the evaluation result, the calculation load, and the specification, the fixed connection form and the specific parameters adopted during evaluation. According to the invention, the efficiency of nuclear engineering equipment fixed connection evaluation can be greatly improved, and a standardized evaluation report is output.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear engineering, and in particular relates to a method and a device for quickly evaluating the fixed connection of nuclear engineering equipment. Background Art

[0002] Nuclear engineering equipment is an important guarantee for the operation of nuclear engineering production lines, and the assessment of equipment fixed connections is one of the important tasks of nuclear engineering equipment safety assessment. Usually, a nuclear engineering equipment is fixed in different forms of fixed connections, ranging from dozens to hundreds. With the increase in equipment with mechanical analysis requirements in nuclear engineering, the demand for fixed connection assessment has also increased.

[0003] At present, for the assessment of fixed connections of nuclear engineering equipment, personnel are usually required to manually calculate the calculated value of the fixed connection stress, and then determine whether the assessment is passed. If passed, the staff will write an assessment report for the fixed connection. The above assessment process has at least the following shortcomings: First, when faced with a large number of fixed connection assessments, manual calculations and report writing are prone to low-level errors, which also increases the workload of the staff and reduces the assessment efficiency; second, when different staff members conduct fixed connection assessments, the report formats they write may not be unified and standardized; third, if there is a change in the fixed connection, the staff must go through the assessment process again, which is another test for the staff. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method and device for rapid assessment of fixed connections of nuclear engineering equipment in view of the above-mentioned deficiencies in the prior art, so as to solve the problems that manual calculation and report writing of existing nuclear engineering equipment when facing numerous fixed connections that need to be assessed are prone to low-level errors, low assessment efficiency, and the format of the written reports may be inconsistent and non-standard.

[0005] The technical solution of the present invention to solve the above technical problems is:

[0006] According to a first aspect of the present invention, there is provided a method for rapid assessment of fixed connections of nuclear engineering equipment, comprising:

[0007] Obtain calculated loads at fixed connections of nuclear engineering equipment;

[0008] Obtain the specifications and forms of fixed connections used in the assessment of fixed connections of nuclear engineering equipment;

[0009] Obtaining specific parameters of the fixed connection form adopted;

[0010] Calculate the calculated stress value of the fixed connection form under the specific parameters and the calculated load conditions according to the adopted specifications, compare it with the allowable stress value specified in the adopted specifications, and determine whether the assessment is passed based on the comparison result to obtain the assessment result;

[0011] A standardized nuclear engineering equipment fixed connection assessment report is generated based on the assessment results, the calculated loads, the specifications adopted during the assessment, the form of fixed connection and its specific parameters.

[0012] Optionally, the method further comprises:

[0013] When the evaluation result is that the calculated stress value is greater than the allowable stress value, the evaluation fails, and the specific parameters of the fixed connection form adopted are reselected and the evaluation is re-performed.

[0014] Optionally, also include:

[0015] When the evaluation result is that the calculated stress value is greater than the allowable stress value, the evaluation fails, and the form of fixed connection adopted and its specific parameters are reselected and the evaluation is re-performed.

[0016] Optionally, obtaining the calculated load at the fixed connection of the nuclear engineering equipment includes:

[0017] Obtain finite element models of nuclear engineering equipment;

[0018] First, the finite element model is input into the finite element analysis software, and the constraint points are established at the corresponding positions of the finite element model according to the actual fixed connection positions of the nuclear engineering equipment;

[0019] Then, according to the actual load conditions of nuclear engineering equipment, boundary conditions and loading loads are set on the finite element model in the finite element analysis software;

[0020] Finite element analysis software is used to analyze the finite element model with boundary conditions set and loads loaded, and the calculated loads at the fixed connections of nuclear engineering equipment are calculated.

[0021] Optionally, before obtaining the finite element model of the nuclear engineering equipment, the method further includes:

[0022] Receiving a two-dimensional model or a three-dimensional model of the nuclear engineering equipment;

[0023] The two-dimensional model or the three-dimensional model is converted into the finite element model.

[0024] Optionally, the specific parameters include specifications and materials of the fixed connection form adopted.

[0025] According to a second aspect of the present invention, there is provided a rapid assessment device for fixed connection of nuclear engineering equipment, comprising:

[0026] A first acquisition module is used to acquire the calculated load at the fixed connection of the nuclear engineering equipment;

[0027] The second acquisition module is used to obtain the specifications and fixed connection forms used in the fixed connection assessment of nuclear engineering equipment;

[0028] A third acquisition module is used to acquire specific parameters of the fixed connection form adopted;

[0029] An evaluation module, connected to the first acquisition module, the second acquisition module and the third acquisition module respectively, for calculating the stress calculation value of the fixed connection form under the specific parameters and the calculated load conditions according to the adopted specifications, and comparing the calculated stress value with the stress allowable value specified in the adopted specifications, judging whether the evaluation is passed according to the comparison result, and obtaining the evaluation result;

[0030] The output module is connected to the assessment module and is used to generate a standardized nuclear engineering equipment fixed connection assessment report based on the assessment results, the calculated load, the specifications adopted during the assessment, the form of fixed connection and its specific parameters.

[0031] Optionally, when the assessment result is that the calculated stress value is greater than the allowable stress value, the assessment module is further used to:

[0032] Feedback the evaluation result to the third acquisition module to reselect the specific parameters of the fixed connection form to be adopted and re-evaluate; or,

[0033] The evaluation result is fed back to the second acquisition module and the third acquisition module so as to reselect the adopted fixed connection form and its specific parameters and re-evaluate.

[0034] Optionally, the acquisition module specifically includes:

[0035] A finite element model acquisition unit, used to acquire a finite element model of nuclear engineering equipment;

[0036] An input unit, used to input the finite element model into the finite element analysis software;

[0037] Loading unit, used to set boundary conditions and apply loads on the finite element model in the finite element analysis software;

[0038] The analysis unit is used to analyze the finite element model with boundary conditions set and loads loaded using finite element analysis software, and calculate the calculated load at the fixed connection of the nuclear engineering equipment.

[0039] Optionally, the device further comprises:

[0040] A receiving module, used for receiving a two-dimensional model or a three-dimensional model of the nuclear engineering equipment;

[0041] A conversion module is used to convert the two-dimensional model or the three-dimensional model into the finite element model.

[0042] According to a third aspect of the present invention, there is provided a device for rapid assessment of fixed connections of nuclear engineering equipment, comprising: a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to implement the rapid assessment method for fixed connections of nuclear engineering equipment as described above.

[0043] Beneficial effects:

[0044] The method and device for rapid assessment of fixed connections of nuclear engineering equipment of the present invention obtain the calculated load at the fixed connection of the nuclear engineering equipment, obtain the specification and the form of fixed connection adopted in the assessment of the fixed connection of the nuclear engineering equipment, and obtain the specific parameters of the adopted fixed connection form; calculate the stress calculated value of the adopted fixed connection form under the conditions of the specific parameters and the calculated load according to the adopted specification, and compare it with the stress allowable value specified in the adopted specification to obtain the assessment result; generate an assessment report of the fixed connection of the nuclear engineering equipment according to the assessment result, the calculated load, and the specification, the form of fixed connection and its specific parameters adopted in the assessment, thereby greatly improving the efficiency of the assessment of the fixed connection of the nuclear engineering equipment, and outputting a standardized assessment report, solving the problems of low-level errors, low assessment efficiency, and non-uniform and non-standard report formats in the manual assessment and report writing of the existing nuclear engineering equipment when facing many fixed connections that need to be assessed, and can be widely used in the mechanical calculation of nuclear engineering equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic diagram of a rapid assessment method for fixed connection of nuclear engineering equipment in Examples 1-3 of the present invention;

[0046] Figure 2 A schematic diagram of the structure of a rapid assessment device fixedly connected to nuclear engineering equipment in Example 4 of the present invention;

[0047] Figure 3 This is a schematic diagram of a rapid assessment method for fixed connections of nuclear engineering equipment in Example 5 of the present invention.

[0048] In the figure: 11 - first acquisition module; 12 - second acquisition module; 13 - third acquisition module; 14 - evaluation module; 15 - output module; 21 - memory; 22 - processor. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the technical solution of the present invention, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0050] It should be understood that the specific embodiments and drawings described herein are only used to explain the present invention rather than to limit the present invention.

[0051] It can be understood that, in the absence of conflict, the various embodiments of the present invention and the various features in the embodiments can be combined with each other.

[0052] It can be understood that, for the convenience of description, the drawings of the present invention only show the parts related to the present invention, while the parts irrelevant to the present invention are not shown in the drawings.

[0053] It can be understood that each unit and module involved in the embodiments of the present invention may correspond to only one physical structure, or may be composed of multiple physical structures, or multiple units and modules may be integrated into one physical structure.

[0054] It can be understood that, without conflict, the functions and steps marked in the flowcharts and block diagrams of the present invention may occur in an order different from that marked in the drawings.

[0055] It is understood that the flowcharts and block diagrams of the present invention illustrate the possible architectures, functions, and operations of the systems, devices, equipment, and methods according to the various embodiments of the present invention. Each box in the flowchart or block diagram may represent a unit, module, program segment, or code, which contains executable instructions for implementing the specified functions. Moreover, each box or combination of boxes in the block diagram and flowchart may be implemented by a hardware-based system that implements the specified functions, or may be implemented by a combination of hardware and computer instructions.

[0056] It can be understood that the units and modules involved in the embodiments of the present invention can be implemented by software or hardware. For example, the units and modules can be located in a processor.

[0057] In view of the problems in the prior art that manual calculation and report writing of nuclear engineering equipment when facing numerous fixed connections that need to be evaluated are prone to low-level errors, low evaluation efficiency, and the format of the written reports may be inconsistent and non-standard, the present invention discloses a rapid evaluation method for fixed connections of nuclear engineering equipment, comprising:

[0058] Obtain calculated loads at fixed connections of nuclear engineering equipment;

[0059] Obtain the specifications and forms of fixed connections used in the assessment of fixed connections of nuclear engineering equipment;

[0060] Obtaining specific parameters of the fixed connection form adopted;

[0061] Calculate the calculated stress value of the fixed connection form under the specific parameters and the calculated load conditions according to the adopted specifications, compare it with the allowable stress value specified in the adopted specifications, and determine whether the assessment is passed based on the comparison result to obtain the assessment result;

[0062] An assessment report on fixed connections of nuclear engineering equipment is generated based on the assessment results, the calculated loads, the specifications adopted during the assessment, the form of fixed connections and their specific parameters.

[0063] Accordingly, the present invention also discloses a nuclear engineering equipment fixed connection rapid assessment device, comprising:

[0064] A first acquisition module is used to acquire the calculated load at the fixed connection of the nuclear engineering equipment;

[0065] The second acquisition module is used to obtain the specifications and fixed connection forms used in the fixed connection assessment of nuclear engineering equipment;

[0066] A third acquisition module is used to acquire specific parameters of the fixed connection form adopted;

[0067] An evaluation module, connected to the first acquisition module, the second acquisition module and the third acquisition module respectively, for calculating the stress calculation value of the fixed connection form under the specific parameters and the calculated load conditions according to the adopted specifications, and comparing the calculated stress value with the stress allowable value specified in the adopted specifications, judging whether the evaluation is passed according to the comparison result, and obtaining the evaluation result;

[0068] The output module is connected to the assessment module and is used to generate a standardized nuclear engineering equipment fixed connection assessment report based on the assessment results, the calculated load, the specifications adopted during the assessment, the form of fixed connection and its specific parameters.

[0069] Correspondingly, the present invention also discloses a rapid assessment device for fixed connections of nuclear engineering equipment, which includes a memory and a processor, wherein the memory stores a computer program, and the processor is configured to run the computer program to implement the rapid assessment method for fixed connections of nuclear engineering equipment as described above.

[0070] Example 1

[0071] like Figure 1 As shown, this embodiment discloses a method for rapid assessment of fixed connection of nuclear engineering equipment, including the following steps S1 to S5:

[0072] Step S1, obtaining the calculated loads at the fixed connections of nuclear engineering equipment.

[0073] In some embodiments, the calculation load of the fixed connection of the nuclear engineering equipment may be obtained by a finite element method, specifically, including the following steps S101 to 104:

[0074] Step S101, obtaining a finite element model of nuclear engineering equipment.

[0075] In this embodiment, the nuclear engineering equipment may be, for example, a storage tank, a glove box, etc., but is not limited thereto. In order to facilitate the analysis of the subsequent analysis software, a finite element model of the nuclear engineering equipment is first obtained.

[0076] Considering that when mechanical analysts receive the task of assessing the fixed connection of nuclear engineering equipment, they generally receive a three-dimensional model or a two-dimensional model of the equipment. Therefore, before obtaining the finite element model of the nuclear engineering equipment, the staff first converts it into the finite element model of the nuclear engineering equipment, which also includes:

[0077] Receiving a two-dimensional model or a three-dimensional model of the nuclear engineering equipment;

[0078] The two-dimensional model or the three-dimensional model is converted into the finite element model.

[0079] Specifically, when a three-dimensional model of nuclear engineering equipment is received, the three-dimensional model can be directly converted into a finite element model that can be recognized by the analysis software; when a two-dimensional model of nuclear engineering equipment is received, it can be first converted into a three-dimensional model, and then the three-dimensional model can be converted into a finite element model that can be recognized by the analysis software.

[0080] Step S102, first input the finite element model into the finite element analysis software, and establish constraint points at corresponding positions of the finite element model according to the actual fixed connection positions of the nuclear engineering equipment.

[0081] In this embodiment, the finite element analysis software is ANSYS software, but is not limited thereto, and may also be other finite element analysis software. After analysis by the finite element analysis software, the calculated load at the fixed connection of the nuclear engineering equipment can be calculated and extracted.

[0082] Step S103, according to the actual loading conditions of the nuclear engineering equipment, the boundary conditions and loading loads are set on the finite element model in the finite element analysis software, and then the calculation is submitted.

[0083] Step S104, using finite element analysis software to analyze the finite element model with boundary conditions set and loads loaded, and extracting the calculated loads at the fixed connections of the nuclear engineering equipment after calculation.

[0084] In this embodiment, the calculated loads include at least two loads in the horizontal direction and one load in the vertical direction.

[0085] In other embodiments, the obtaining of the calculated loads at the fixed connections of the nuclear engineering equipment may also be: when a mechanical analyst receives a task to assess the fixed connections of the nuclear engineering equipment, the calculated loads at the fixed connections of the nuclear engineering equipment are obtained through simple theoretical calculations.

[0086] Step S2, obtaining the specifications and fixed connection forms used in the fixed connection assessment of nuclear engineering equipment.

[0087] In some embodiments, the specification and the form of fixed connection used in obtaining the fixed connection assessment of nuclear engineering equipment specifically include:

[0088] A database including fixed connection assessment specifications, fixed connection forms and other data is preset in the third-party software. The third-party software sets a visual interface, through which these data can be displayed to the staff for selection;

[0089] Through the visual interface, the specifications and forms of fixed connections used in the fixed connection assessment of nuclear engineering equipment are selected in the third-party software, and the relevant data in the database are read to obtain the specifications and forms of fixed connections used in the fixed connection assessment of nuclear engineering equipment.

[0090] Compared with the existing technology, which requires consulting relevant materials to confirm the assessment specifications after calculation, in this method, the staff can obtain a rich database of assessment specifications, fixed connection forms and other data in the third-party software, and directly select the required data according to the calculated load in the visual interface, which is convenient for providing specifications and other data support for the subsequent assessment process, and can improve the assessment efficiency and accuracy.

[0091] In this embodiment, the third-party software may be CheckTools software (software name: calculation and evaluation software for fixed connections of different shapes), but is not limited thereto.

[0092] In this embodiment, the standards used in the fixed connection assessment are RCC-M standards, ASME standards, CP03T4003 "Nuclear Power Plant Standard Support and Hanger Manual" assessment criteria, etc., but are not limited thereto.

[0093] In this embodiment, the fixed connection is in the form of weld connection or anchor bolt connection, but is not limited thereto.

[0094] Step S3, obtaining specific parameters of the fixed connection form adopted.

[0095] In some embodiments, similar to the method of obtaining the specifications and the fixed connection form used in the fixed connection assessment of nuclear engineering equipment, the specific parameters of the fixed connection form used for obtaining the fixed connection form include:

[0096] A database of specific parameters of various fixed connection forms can also be preset in third-party software, and these specific parameters can be displayed to the staff for selection through a visual interface;

[0097] Through the visual interface, the specific parameters of the fixed connection form adopted are selected in the third-party software, and the specific parameters of the fixed connection form adopted are obtained by reading the relevant data in the database.

[0098] It should be noted that the specific parameters of the fixed connection form adopted may also be obtained by setting an input module in a third-party software and directly inputting the specific parameters of the fixed connection form adopted in the input module of the third-party software, thereby obtaining the specific parameters of the fixed connection form adopted.

[0099] In this embodiment, the specific parameters include the specifications, materials, etc. of the fixed connection form adopted, and are adjusted specifically according to the fixed connection form adopted. For example, when the fixed connection form adopted is a weld connection, the specific parameters include the weld shape, size, weld height, tensile strength of the parent material, etc.; when the fixed connection form adopted is an anchor bolt connection, the specific parameters include the anchor bolt model, size, etc.

[0100] Step S4, calculate the stress calculation value of the fixed connection form under the specific parameters and the calculated load conditions according to the adopted specifications, and compare it with the stress allowable value specified in the adopted specifications, determine whether the assessment is passed based on the comparison result, and obtain the assessment result.

[0101] Specifically, the stress calculation formula and stress allowable value related to the adopted fixed connection form recorded in the adopted specification are obtained; the stress calculation value is calculated according to the stress calculation formula, the specific parameters and the calculated load; the stress calculation value is compared with the stress allowable value recorded in the adopted specification, and the evaluation result is obtained according to the comparison result, wherein, if the stress calculation value is greater than the stress allowable value, the evaluation result is failed, and if the stress calculation value is less than or equal to the stress allowable value, the evaluation result is passed.

[0102] Step S5, generating a standardized nuclear engineering equipment fixed connection assessment report based on the assessment results, the calculated loads, the specifications adopted during the assessment, the form of fixed connection and its specific parameters, and outputting the assessment report.

[0103] Specifically, if the assessment result is passed, that is, the calculated stress value is less than or equal to the allowable stress value, in other words, the stress ratio of the calculated stress value to the allowable stress value is less than or equal to 1, then a standardized nuclear engineering equipment fixed connection assessment report is generated based on the assessment result, the calculated load, and the specifications, fixed connection form and specific parameters used in the assessment. If the assessment result is not passed, that is, the calculated stress value is greater than the allowable stress value, in other words, the stress ratio of the calculated stress value to the allowable stress value is greater than 1, then a conclusion of not passing the assessment can be fed back, and at this time, the mechanical analyst can optimize the fixed connection form and specific parameters used by the nuclear power equipment based on the conclusion.

[0104] In this embodiment, the assessment report includes three chapters: 1. Specifications used in the assessment, which is a chapter that lists the specific specifications used in the fixed connection assessment; 2. Assessment calculations for fixed connections, which is used to assess each set of calculated loads based on the specifications used listed in the first chapter; 3. Appendix calculated loads, which is used to list the calculated loads at the fixed connections.

[0105] In some embodiments, since some nuclear engineering equipment may have multiple fixed connection positions, the calculated loads at the fixed connection positions of some nuclear engineering equipment may be one set of data or multiple sets of data. If the calculated loads are multiple sets of data, only the set of data with the largest stress ratio is listed in the second chapter of the assessment report. If the stress ratio is greater than 1, the assessment fails. If the stress ratio is less than or equal to 1, the assessment passes.

[0106] In some embodiments, the method further comprises:

[0107] When the evaluation result is that the calculated stress value is greater than the allowable stress value, the evaluation fails, and the specific parameters of the fixed connection form adopted are reselected (i.e., the specific parameters of the fixed connection form adopted are optimized) and the evaluation is re-performed.

[0108] In other embodiments, the method further comprises:

[0109] When the evaluation result is that the calculated stress value is greater than the allowable stress value, the evaluation fails, and the fixed connection form and its specific parameters are reselected (i.e., the fixed connection form and the specific parameters of the fixed connection form are optimized) and the evaluation is re-performed.

[0110] The rapid assessment method for fixed connections of nuclear engineering equipment of the present embodiment obtains the calculated load at the fixed connection of the nuclear engineering equipment, obtains the specification and the form of fixed connection adopted in the assessment of the fixed connection of the nuclear engineering equipment, and obtains the specific parameters of the adopted fixed connection form; calculates the stress calculated value of the adopted fixed connection form under the conditions of the specific parameters and the calculated load according to the adopted specification, and compares it with the stress allowable value specified in the adopted specification to obtain the assessment result; generates an assessment report for the fixed connection of the nuclear engineering equipment according to the assessment result, the calculated load, and the specification, the form of fixed connection and its specific parameters adopted in the assessment, thereby greatly improving the efficiency of the assessment of the fixed connection of the nuclear engineering equipment, and outputting a standardized assessment report, solving the problems of the existing nuclear engineering equipment being prone to low-level errors, low assessment efficiency, and non-uniform and non-standard report formats when manual assessment and report writing are required when many fixed connections need to be assessed, and can be widely used in the mechanical calculation of nuclear engineering equipment.

[0111] Example 2

[0112] like Figure 1 As shown, this embodiment discloses a rapid assessment method for fixed connection of nuclear engineering equipment, wherein, assuming that the fixed connection form adopted is weld connection, and the assessment specification adopts RCC-M specification, then this method includes the following steps S1 to S5:

[0113] Step S1, obtaining the calculated loads at the fixed connections of the nuclear engineering equipment. The calculated loads in this step determine the content of the third chapter of the nuclear engineering equipment fixed connection assessment report.

[0114] Specifically, when mechanical analysts receive a task to assess the fixed connection of nuclear engineering equipment, taking the three-dimensional model of nuclear engineering equipment as an example, first, the three-dimensional model is converted into a finite element model that can be recognized by the analysis software; then, the finite element model is input into the finite element analysis software ANSYS, and constraint points are established at the corresponding positions of the finite element model according to the actual fixed connection positions of the nuclear engineering equipment; then, according to the actual loading conditions of the nuclear engineering equipment, boundary conditions and loads are set on the finite element model in the finite element analysis software, and then the calculation is submitted; the finite element model with boundary conditions and loads is analyzed using the finite element analysis software, and the calculated loads at the fixed connections of the nuclear engineering equipment are extracted after calculation. Assuming that the number of fixed connection positions of the nuclear engineering equipment is three, the calculated loads under accident conditions are shown in Table 1.

[0115] Table 1 Calculation load data under accident conditions

[0116] Serial number FX(N) FY(N) FZ(N) MX(Nmm) MY(Nmm) MZ(Nmm) 1 2400 940 16000 106800 389500 71800 2 2370 2250 8070 451000 231000 55020 3 1020 2660 6780 525000 215000 28710

[0117] Step S2, obtaining the specifications and fixed connection forms used in the assessment of nuclear engineering equipment fixed connection. The specifications and fixed connection forms used in the assessment of nuclear engineering equipment fixed connection obtained in this step determine the content of the first chapter of the nuclear engineering equipment fixed connection assessment report.

[0118] Specifically, a database including fixed connection assessment specifications (including RCC-M specifications, ASME specifications, CP03T4003 "Nuclear Power Plant Standard Support and Hanger Manual" assessment criteria, etc.) and fixed connection forms (including weld connections, anchor connections, etc.) is preset in the CheckTools software. Through the visual interface, these data can be displayed to the staff for selection; through the visual interface, the specifications used in the assessment of fixed connections of nuclear engineering equipment are selected as RCC-M specifications, and the form of fixed connection is weld connection in the CheckTools software, and the relevant data is read from the database of the CheckTools software.

[0119] According to the RCC-M specification, for the equipment connection fillet weld part, the weld stress is evaluated by using H3280 in RCC-M Volume I, Section H for stress strength assessment. The stress assessment criteria and the basic allowable stress limit of the weld are shown in Table 2 and Table 3 respectively.

[0120] Table 2 Stress assessment criteria

[0121]

[0122] Table 3 Basic allowable stress limits of welds

[0123]

[0124] Step S3, obtaining specific parameters of the fixed connection form.

[0125] Specifically, a database of specific parameters including the side length of the square weld, weld height, and base material tensile strength of the weld connection form is preset in the CheckTools software. Through a visual interface, these specific parameters can be displayed to the staff for selection. Through the visual interface, the specific parameters of the weld connection form are selected in the CheckTools software, and the specific parameters of the weld connection used can be obtained by reading the relevant data in the database.

[0126] Assuming that the actual weld shape is a square peripheral weld, the square side length is 100mm, the weld height is 10mm, and the tensile strength of the parent material is 400MPa, the specific parameters of the weld connection selected in this step are: the square weld side length is 100mm, the weld height is 10mm, and the tensile strength of the parent material is selected as 310~415MPa.

[0127] Step S4, calculate the stress calculation value of the weld connection under the specific parameters and the calculated load conditions according to the adopted specifications, and compare it with the stress allowable value specified in the adopted specifications, determine whether the assessment is passed based on the comparison result, and obtain the assessment result.

[0128] Specifically, according to the selected specific parameters, the stress calculation formula and stress allowable value (referred to as allowable value) of the weld connection corresponding to the specific parameters in the RCC-M specification are obtained; according to the corresponding stress calculation formula, the selected specific parameters and the obtained calculated load, the stress calculation value (referred to as calculated value) is calculated; the stress calculation value is compared with the obtained stress allowable value, and the evaluation result is obtained according to the comparison result, wherein, if the stress calculation value is greater than the stress allowable value, the evaluation result is failed, and if the stress calculation value is less than or equal to the stress allowable value, the evaluation result is passed.

[0129] According to the RCC-M specification, here, the effective weld height h = t × sin45° is used for calculation, and the calculation criteria for weld calculation stress are shown in Table 4. The support reaction force under each working condition is equivalently concentrated at the center of the horizontal weld section, and the fillet weld characteristics and weld design stress are calculated according to the formula in Table 4 (for fillet welds, the Z direction is the normal direction of the weld calculation section). It is conservatively assumed that the stresses in all directions at the fillet weld are shear stresses, and the maximum shear stresses in the horizontal and vertical directions of the fillet weld are calculated, and then the vector sum of the two is taken for evaluation.

[0130] Table 4 Calculation criteria for weld stress

[0131]

[0132]

[0133] Conservatively, the weld calculation load under accident conditions is taken and the weld is evaluated according to the OA level standard. Here, the direction perpendicular to the weld section is the Z direction, the weld height is 10 mm, and the calculated load at the weld connection under accident conditions is shown in Table 1. The specific parameters of the weld connection are shown in Table 5, and the calculation results are shown in Tables 6 and 7.

[0134] Table 5 Weld section parameters

[0135]

[0136] Table 6 Maximum weld stress under accident conditions

[0137] Fx(N) Fy(N) Fz(N) Mx(Nmm) My(Nmm) Mz(Nmm) 2400 940 16000 106800 389500 71800

[0138] Table 7 Weld stress assessment

[0139]

[0140] It can be seen from Table 7 that the stress ratio between the calculated value and the allowable value is 0.082, which is less than 1. In other words, the calculated stress value is less than the allowable stress value. Therefore, the specific parameters of the above-mentioned weld connection are qualified and the evaluation is passed.

[0141] S5, generating a standardized nuclear engineering equipment fixed connection assessment report based on the assessment results, the calculated load, the specifications adopted during the assessment, the form of fixed connection and its specific parameters, and the assessment is completed, wherein the above steps S3 and S4 determine the content of the second chapter of the fixed connection assessment report.

[0142] Example 3

[0143] like Figure 1 As shown, this embodiment discloses a rapid assessment method for fixed connection of nuclear engineering equipment, wherein, assuming that the fixed connection form adopted is anchor connection, and the assessment specification adopts the assessment standard of CP03T4003 "Nuclear Power Plant Standard Support and Hanger Manual", then this method includes the following steps S1 to S5:

[0144] Step S1, obtaining the calculated loads at the fixed connections of nuclear engineering equipment. The calculated loads in this step determine the content of the third section of the fixed connection assessment report.

[0145] Specifically, when mechanical analysts receive a task to assess the fixed connection of nuclear engineering equipment, taking the two-dimensional model of nuclear engineering equipment as an example, first, the two-dimensional model of the nuclear engineering equipment is converted into a three-dimensional model, and then the three-dimensional model is converted into a finite element model that can be recognized by the analysis software; then, the finite element model is first input into the finite element analysis software ANSYS, and constraint points are established at the corresponding positions of the finite element model according to the actual fixed connection positions of the nuclear engineering equipment; then, according to the actual loading conditions of the nuclear engineering equipment, boundary conditions and loads are set on the finite element model in the finite element analysis software, and then the calculation is submitted; the finite element model with boundary conditions set and loads loaded is analyzed using the finite element analysis software, and the calculated loads at the fixed connections of the nuclear engineering equipment are extracted after calculation. Assuming that the number of fixed connection positions of the nuclear engineering equipment is three, the calculated loads are specifically shown in Table 8.

[0146] Table 8 Calculation load data

[0147]

[0148]

[0149] Step S2, obtaining the specifications and fixed connection forms used in the assessment of nuclear engineering equipment fixed connection. The specifications and fixed connection forms used in the assessment of nuclear engineering equipment fixed connection obtained in this step determine the content of the first chapter of the nuclear engineering equipment fixed connection assessment report.

[0150] Specifically, a database including fixed connection assessment specifications (including RCC-M specifications, ASME specifications, CP03T4003 "Nuclear Power Plant Standard Support and Hanger Manual" assessment criteria, etc.), fixed connection forms (including weld connections, anchor connections, etc.) and other data is preset in the CheckTools software. Through the visual interface, these parameters can be displayed to the staff for selection; through the visual interface, the specifications used in the assessment of fixed connections of nuclear engineering equipment are selected in the CheckTools software as the CP03T4003 "Nuclear Power Plant Standard Support and Hanger Manual" assessment criteria, and the form of fixed connection is anchor connection, and the relevant data is read from the database of the CheckTools software.

[0151] According to the assessment criteria of CP03T4003 "Nuclear Power Plant Standard Support and Hanger Manual", for the anchor bolts of fixed equipment, the assessment criteria of the anchor bolts and the anchor bolt bearing capacity limit (i.e., the allowable stress value) are shown in Table 9 and Table 10 respectively.

[0152] Table 9 Anchor bolt assessment criteria

[0153]

[0154] Table 10 Anchor bolt bearing capacity limit

[0155]

[0156]

[0157] Step S3, obtaining specific parameters of the fixed connection form.

[0158] Specifically, a database of specific parameters including anchor bolt models is preset in the CheckTools software. Through a visual interface, these specific parameters can be displayed to the staff for selection. Through the visual interface, the specific parameters of the anchor bolt connection are selected in the CheckTools software, and the specific parameters of the weld connection used are obtained by reading the relevant data in the database.

[0159] Assuming that the actual anchor bolt model is a P-type M8 anchor bolt, the specific parameters of the anchor bolt connection selected in this step are specifically M8 anchor bolts (P-type).

[0160] Step S4, calculating the stress calculation value of the anchor connection under the specific parameters and the calculated load conditions according to the adopted specifications, and comparing it with the stress allowable value specified in the adopted specifications, judging whether the assessment is passed based on the comparison result, and obtaining the assessment result.

[0161] Specifically, according to the selected specific parameters, the stress calculation formula and stress allowable value (referred to as allowable value) of the anchor bolt corresponding to the specific parameters in the assessment criteria of CP03T4003 "Nuclear Power Plant Standard Support and Hanger Manual" are obtained; according to the corresponding stress calculation formula, the selected specific parameters and the obtained calculated load, the stress calculation value (referred to as calculated value) is calculated; the stress calculation value is compared with the obtained stress allowable value, and the assessment result is obtained according to the comparison result, wherein, if the stress calculation value is greater than the stress allowable value, the assessment result is failed, and if the stress calculation value is less than or equal to the stress allowable value, the assessment result is passed.

[0162] Under abnormal working conditions and accident conditions, the calculated loads at the anchor bolt connection are shown in Table 8. According to the evaluation criteria of CP03T4003 "Nuclear Power Plant Standard Support and Hanger Manual", the maximum value of the tension-shear combination value is taken for evaluation, and the calculation results are shown in Tables 11 and 12.

[0163] Table 11 Anchor bolt stress (Z direction is the tension direction)

[0164] Working conditions Fx(N) Fy(N) Fz(N) Abnormal working conditions 1300.00 170.00 4200.00 Accident conditions 1500.00 500.00 5200.00

[0165] Table 12 Anchor bolt load assessment results

[0166]

[0167] It can be seen from Table 12 that under abnormal conditions and accident conditions, the stress ratios of the calculated value and the allowable value are both less than 1, that is, the calculated stress value is less than the allowable stress value. Therefore, the specific parameters of the above anchor connection are qualified and passed the assessment.

[0168] S5, generating a standardized nuclear engineering equipment fixed connection assessment report based on the assessment results, the calculated load, the specifications adopted during the assessment, the form of fixed connection and its specific parameters, and the assessment is completed, wherein the above steps S3 and S4 determine the content of the second chapter of the fixed connection assessment report.

[0169] Example 4

[0170] like Figure 2 As shown, this embodiment discloses a rapid assessment device for fixed connection of nuclear engineering equipment, which is used to perform the rapid assessment method for fixed connection of nuclear engineering equipment, and the device includes:

[0171] The first acquisition module 11 is used to obtain the calculated load at the fixed connection of the nuclear engineering equipment;

[0172] The second acquisition module 12 is used to obtain the specifications and fixed connection forms used in the fixed connection assessment of nuclear engineering equipment;

[0173] The third acquisition module 13 is used to acquire specific parameters of the fixed connection form adopted;

[0174] An evaluation module 14, connected to the first acquisition module 11, the second acquisition module 12 and the third acquisition module 13 respectively, is used to calculate the stress calculation value of the fixed connection form under the specific parameters and the calculated load conditions according to the adopted specifications, and compare it with the stress allowable value specified in the adopted specifications, and determine whether the evaluation is passed according to the comparison result to obtain the evaluation result;

[0175] The output module 15 is connected to the evaluation module 14 and is used to generate a standardized nuclear engineering equipment fixed connection evaluation report based on the evaluation results, the calculated loads, the specifications adopted during the evaluation, the form of fixed connection and its specific parameters.

[0176] Specifically, if the calculated stress value is less than or equal to the allowable stress value, that is, the stress ratio of the calculated stress value to the allowable stress value is less than or equal to 1, then the assessment is passed, that is, the fixed connection form and specific parameters adopted by the nuclear engineering equipment meet the requirements; if the calculated stress value is greater than the allowable stress value, that is, the stress ratio of the calculated stress value to the allowable stress value is greater than 1, then the assessment is failed, that is, the fixed connection form and specific parameters adopted by the nuclear engineering equipment do not meet the requirements.

[0177] In some embodiments, the acquisition module 11 acquires the calculated load at the fixed connection of the nuclear engineering equipment, which may be acquired by a finite element method. In this case, the acquisition module specifically includes:

[0178] A finite element model acquisition unit, used to acquire a finite element model of nuclear engineering equipment;

[0179] An input unit is used to input the finite element model into the finite element analysis software, such as ANSYS software;

[0180] Loading unit, used to set boundary conditions and apply loads on the finite element model in the finite element analysis software;

[0181] The analysis unit is used to analyze the finite element model with boundary conditions set and loads loaded using finite element analysis software, and calculate the calculated load at the fixed connection of the nuclear engineering equipment.

[0182] In some embodiments, the device further comprises:

[0183] A receiving module, used for receiving a two-dimensional model or a three-dimensional model of the nuclear engineering equipment;

[0184] A conversion module is used to convert the two-dimensional model or the three-dimensional model into the finite element model.

[0185] Specifically, when a three-dimensional model of nuclear engineering equipment is received, it is used to convert the three-dimensional model into a finite element model that can be recognized by the analysis software; when a two-dimensional model of nuclear engineering equipment is received, it is used to first convert it into a three-dimensional model, and then convert the three-dimensional model into a finite element model that can be recognized by the analysis software.

[0186] In other embodiments, the acquisition module 11 acquires the calculated load at the fixed connection of the nuclear engineering equipment, and may also obtain the calculated load at the fixed connection of the nuclear engineering equipment through simple theoretical calculation.

[0187] In some embodiments, the second acquisition module is connected to a third-party software, and the third-party software is preset with a database including fixed connection assessment specifications and fixed connection forms. The third-party software is provided with a visual interface, through which these data can be displayed to the staff for selection, and the specifications and fixed connection forms used in the fixed connection assessment of nuclear engineering equipment can be selected in the third-party software. The second acquisition module obtains the data of the specifications and fixed connection forms used in the fixed connection assessment of nuclear engineering equipment by reading relevant data from the database of the third-party software.

[0188] In this embodiment, the third-party software may be CheckTools software (software name: calculation and evaluation software for fixed connections of different shapes), but is not limited thereto.

[0189] In some embodiments, the third acquisition module is connected to a third-party software, and the third-party software is preset with a database including specific parameters of various fixed connection forms. Through a visual interface, these specific parameters can be displayed to the staff for selection, and the specific parameters of the fixed connection form used can be selected and determined in the third-party software. The third acquisition module obtains the specific parameters of the fixed connection form used by reading relevant data from the database of the third-party software, but is not limited to this. For example, an input module can also be set in the third-party software, and the specific parameters of the fixed connection form used can be directly input into the input module of the third-party software to obtain the specific parameters of the fixed connection form used.

[0190] In some embodiments, the specific parameters include the specifications, materials, etc. of the fixed connection form adopted, and are adjusted specifically according to the fixed connection form adopted. For example, when the fixed connection form adopted is a weld connection, the specific parameters include the weld shape, size, weld height, tensile strength of the parent material, etc.; when the fixed connection form adopted is an anchor bolt connection, the specific parameters include the anchor bolt model, size, etc.

[0191] In some embodiments, when the evaluation result is that the calculated stress value is greater than the allowable stress value, that is, when the evaluation fails, the evaluation module is further configured to:

[0192] The evaluation result is fed back to the third acquisition module to reselect the specific parameters of the fixed connection form adopted and re-evaluate; or, the evaluation result is fed back to the second acquisition module and the third acquisition module to reselect the fixed connection form adopted and its specific parameters and re-evaluate.

[0193] When the assessment result is that the calculated stress value is less than the allowable stress value, that is, the assessment is passed, the output module clicks the output button to generate a standardized nuclear engineering equipment fixed connection assessment report and then outputs it.

[0194] The rapid assessment device for fixed connection of nuclear engineering equipment of the present embodiment obtains the calculated load at the fixed connection of nuclear engineering equipment, obtains the specification and the form of fixed connection adopted in the assessment of fixed connection of nuclear engineering equipment, and obtains the specific parameters of the adopted fixed connection form; calculates the calculated stress value of the adopted fixed connection form under the conditions of the specific parameters and the calculated load according to the adopted specification, and compares it with the allowable stress value specified in the adopted specification, and determines whether the assessment is passed according to the comparison result to obtain the assessment result; generates an assessment report of the fixed connection of nuclear engineering equipment according to the assessment result, the calculated load, and the specification, the form of fixed connection and its specific parameters adopted in the assessment, thereby greatly improving the efficiency of the assessment of the fixed connection of nuclear engineering equipment, and outputting a standardized assessment report, solving the problems of low-level errors, low assessment efficiency, and non-uniform and non-standard report formats in the manual assessment and report writing of existing nuclear engineering equipment when facing many fixed connections that need to be assessed, and can be widely used in the mechanical calculation of nuclear engineering equipment.

[0195] Example 5

[0196] like Figure 3 As shown, this embodiment discloses a rapid assessment device for fixed connections of nuclear engineering equipment, which includes a memory 21 and a processor 22, wherein the memory 21 stores a computer program, and the processor 22 is configured to run the computer program to implement the rapid assessment method for fixed connections of nuclear engineering equipment as described above.

[0197] The rapid assessment device for fixed connection of nuclear engineering equipment of the present embodiment obtains the calculated load at the fixed connection of nuclear engineering equipment, obtains the specification and the form of fixed connection adopted in the assessment of fixed connection of nuclear engineering equipment, and obtains the specific parameters of the adopted fixed connection form; calculates the stress calculated value of the adopted fixed connection form under the conditions of the specific parameters and the calculated load according to the adopted specification, and compares it with the stress allowable value specified in the adopted specification, and judges whether the assessment is passed according to the comparison result to obtain the assessment result; generates an assessment report of the fixed connection of nuclear engineering equipment according to the assessment result, the calculated load, and the specification, the form of fixed connection and its specific parameters adopted in the assessment, thereby greatly improving the efficiency of the assessment of the fixed connection of nuclear engineering equipment, and outputting a standardized assessment report, solving the problems of low-level errors, low assessment efficiency, and non-uniform and non-standard report formats in the manual assessment and report writing of existing nuclear engineering equipment when facing many fixed connections that need to be assessed, and can be widely used in the mechanical calculation of nuclear engineering equipment.

[0198] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A rapid assessment method for fixed connections of nuclear engineering equipment, characterized in that: include: Obtain calculated loads at fixed connections of nuclear engineering equipment; Obtain the specifications and forms of fixed connections used in the assessment of fixed connections of nuclear engineering equipment; Obtaining specific parameters of the fixed connection form adopted; Calculate the calculated stress value of the fixed connection form under the specific parameters and the calculated load conditions according to the adopted specifications, compare it with the allowable stress value specified in the adopted specifications, and determine whether the assessment is passed based on the comparison result to obtain the assessment result; A standardized nuclear engineering equipment fixed connection assessment report is generated based on the assessment results, the calculated loads, the specifications adopted during the assessment, the form of fixed connection and its specific parameters.

2. The rapid assessment method for fixed connection of nuclear engineering equipment according to claim 1, characterized in that: Also includes: When the evaluation result is that the calculated stress value is greater than the allowable stress value, the evaluation fails, and the specific parameters of the fixed connection form adopted are reselected and the evaluation is re-performed.

3. The rapid assessment method for fixed connection of nuclear engineering equipment according to claim 1, characterized in that: Also includes: When the evaluation result is that the calculated stress value is greater than the allowable stress value, the evaluation fails, and the form of fixed connection adopted and its specific parameters are reselected and the evaluation is re-performed.

4. The rapid assessment method for fixed connection of nuclear engineering equipment according to any one of claims 1 to 3, characterized in that: The step of obtaining the calculated load at the fixed connection of the nuclear engineering equipment includes: Obtain finite element models of nuclear engineering equipment; First, the finite element model is input into the finite element analysis software, and the constraint points are established at the corresponding positions of the finite element model according to the actual fixed connection positions of the nuclear engineering equipment; Then, according to the actual load conditions of nuclear engineering equipment, boundary conditions and loading loads are set on the finite element model in the finite element analysis software; Finite element analysis software is used to analyze the finite element model with boundary conditions set and loads loaded, and the calculated loads at the fixed connections of nuclear engineering equipment are calculated.

5. The rapid assessment method for fixed connection of nuclear engineering equipment according to claim 4, characterized in that: Before obtaining the finite element model of the nuclear engineering equipment, the method further includes: Receiving a two-dimensional model or a three-dimensional model of the nuclear engineering equipment; The two-dimensional model or the three-dimensional model is converted into the finite element model.

6. The rapid assessment method for fixed connection of nuclear engineering equipment according to any one of claims 1 to 3, characterized in that: The specific parameters include the specifications and materials of the fixed connection form adopted.

7. A rapid assessment device for fixed connection of nuclear engineering equipment, characterized in that: include: A first acquisition module (11) is used to acquire the calculated load at the fixed connection of the nuclear engineering equipment; A second acquisition module (12) is used to acquire the specifications and fixed connection forms used in the fixed connection assessment of nuclear engineering equipment; A third acquisition module (13) is used to acquire specific parameters of the fixed connection form adopted; An evaluation module (14) is connected to the first acquisition module, the second acquisition module and the third acquisition module respectively, and is used to calculate the stress calculation value of the fixed connection form under the specific parameters and the calculated load conditions according to the adopted specifications, and compare the calculated stress value with the stress allowable value specified in the adopted specifications, and determine whether the evaluation is passed according to the comparison result to obtain the evaluation result; The output module (15) is connected to the evaluation module and is used to generate a standardized nuclear engineering equipment fixed connection evaluation report based on the evaluation results, the calculated load, the specifications adopted during the evaluation, the form of the fixed connection and its specific parameters.

8. The rapid assessment device for fixed connection of nuclear engineering equipment according to claim 7, characterized in that: When the evaluation result is that the calculated stress value is greater than the allowable stress value, the evaluation module is further used to: Feedback the evaluation result to the third acquisition module to reselect the specific parameters of the fixed connection form to be adopted and re-evaluate; or, The evaluation result is fed back to the second acquisition module and the third acquisition module so as to reselect the adopted fixed connection form and its specific parameters and re-evaluate.

9. The nuclear engineering equipment fixed connection rapid assessment device according to claim 7 or 8, characterized in that: The acquisition module specifically includes: A finite element model acquisition unit, used to acquire a finite element model of nuclear engineering equipment; An input unit, used to input the finite element model into the finite element analysis software; Loading unit, used to set boundary conditions and apply loads on the finite element model in the finite element analysis software; The analysis unit is used to analyze the finite element model with boundary conditions set and loads loaded using finite element analysis software, and calculate the calculated load at the fixed connection of the nuclear engineering equipment.

10. The rapid assessment device for fixed connection of nuclear engineering equipment according to claim 9, characterized in that: The device also includes: A receiving module, used for receiving a two-dimensional model or a three-dimensional model of the nuclear engineering equipment; A conversion module is used to convert the two-dimensional model or the three-dimensional model into the finite element model.

11. A rapid assessment device for fixed connection of nuclear engineering equipment, characterized in that: It comprises a memory (21) and a processor (22), wherein the memory stores a computer program, and the processor is configured to run the computer program to implement a rapid assessment method for fixed connections of nuclear engineering equipment as described in any one of claims 1 to 6.

Images