CN112613203A - Pipeline stress analysis and evaluation method for fuel system of nuclear emergency diesel generating set - Google Patents
Pipeline stress analysis and evaluation method for fuel system of nuclear emergency diesel generating set Download PDFInfo
- Publication number
- CN112613203A CN112613203A CN202011377503.2A CN202011377503A CN112613203A CN 112613203 A CN112613203 A CN 112613203A CN 202011377503 A CN202011377503 A CN 202011377503A CN 112613203 A CN112613203 A CN 112613203A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- fuel system
- pipe
- oil
- emergency diesel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 58
- 238000004458 analytical method Methods 0.000 title claims abstract description 31
- 238000011156 evaluation Methods 0.000 title claims abstract description 11
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 24
- 238000013461 design Methods 0.000 claims description 23
- 238000006073 displacement reaction Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 230000003068 static effect Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 claims description 5
- 239000002828 fuel tank Substances 0.000 claims description 5
- 230000013011 mating Effects 0.000 claims description 5
- 238000004088 simulation Methods 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 48
- 239000000243 solution Substances 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 4
- 108010062653 Wiskott-Aldrich Syndrome Protein Family Proteins 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 101100256253 Arabidopsis thaliana SCAR2 gene Proteins 0.000 description 1
- 102100038144 Wiskott-Aldrich syndrome protein family member 1 Human genes 0.000 description 1
- 102100037103 Wiskott-Aldrich syndrome protein family member 2 Human genes 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010622 cold drawing Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012821 model calculation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/14—Pipes
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2119/00—Details relating to the type or aim of the analysis or the optimisation
- G06F2119/14—Force analysis or force optimisation, e.g. static or dynamic forces
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention discloses a nuclear emergency diesel generator set fuel system pipeline stress analysis and evaluation method, wherein a nuclear emergency diesel generator set fuel system pipeline comprises an oil supply pipe, an oil return pipe and an oil injection pipe, guide supports are arranged on the oil supply pipe, the oil return pipe and the oil injection pipe, one end of the oil supply pipe is directly or indirectly connected with an emergency diesel generator set, the other end of the oil supply pipe is directly or indirectly connected with an oil tank, one end of the oil return pipe is directly or indirectly connected with the emergency diesel generator set, and the other end of the oil return pipe is directly or indirectly connected with the oil tank.
Description
Technical Field
A stress analysis and evaluation method for a fuel system pipeline of a nuclear emergency diesel generating set.
Background
Compared with the stress analysis of the conventional industrial pipeline, the stress analysis of the nuclear-grade pipeline of the nuclear power station has the advantages of complex pipeline arrangement, various working conditions, special loads of pressure, dead weight, thermal expansion, earthquake and the like of nuclear power engineering, and high evaluation requirements.
At present, a pipeline designer has the capability of carrying out detailed pipeline stress analysis on a pipeline system, but does not have a complete and fine analysis and evaluation method for nuclear pipelines of a nuclear power station.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a method for analyzing and evaluating the stress of a fuel system pipeline of a nuclear emergency diesel generating set, which can be used for analyzing the stress of a nuclear-grade pipeline in a complete and systematic manner, optimizing the pipeline arrangement, providing a basis for the design and the model selection of a support and hanger, improving the stability and the reliability of the pipeline system, maintaining the safety of a nuclear power station and simultaneously providing a reference for the stress calculation of the pipeline of a nuclear emergency diesel generating set lubricating oil and high and low temperature water system.
The purpose of the invention is realized by adopting the following technical scheme:
a nuclear emergency diesel generating set fuel system pipeline stress analysis and evaluation method comprises the following steps of arranging a guide support on an oil supply pipe, an oil return pipe and an oil injection pipe, directly or indirectly connecting one end of the oil supply pipe with an emergency diesel generating set, directly or indirectly connecting the other end of the oil supply pipe with an oil tank, directly or indirectly connecting one end of the oil return pipe with the emergency diesel generating set, and directly or indirectly connecting the other end of the oil return pipe with the oil tank,
s1: inputting pipeline materials, temperature, pressure and allowable stress;
s2: determining the pipeline trend design according to the pressure pipeline design standard, the plant layout requirement and the equipment installation requirement, and determining various technical parameters of the pipeline;
s3: according to a three-dimensional pipeline axonometric diagram drawn by a piping engineer, carrying out finite element modeling on the pipeline by using CAESARII software and inputting parameters;
s4: adding technical parameters of a guide bracket in the finite element model;
s5: establishing a working condition combination, and performing primary stress check and secondary stress check on a fuel system pipeline;
s6: performing pipeline modal analysis;
s7: inputting earthquake loads into a fuel system pipeline of a nuclear emergency diesel generating set, and performing earthquake simulation;
s8: establishing a seismic working condition combination, and calculating a finite element model;
s9: if the stress value and the displacement value are not in the allowable range, the steps S3-S7 are repeated until the result meets the specification requirement.
As a further improvement of the present invention, in step S2, the technical parameters of the pipeline are as follows: the design pressure is 1000KPa, the outer diameter of the oil supply pipe and the oil return pipe is 26.7mm, the thickness is 2.87mm, and the design temperature is 60 ℃; the filler pipe had an outside diameter of 48.3mm, a thickness of 3.68mm, a design temperature of 20 ℃ and a density of the fluid inside the pipe of 0.00084 kg./cu.cm.
As a further improvement of the invention, in step S3, a finite element model of a fuel system pipeline of the nuclear emergency diesel generator set is created by using caesari stress analysis software, a pipe connecting flange i, a pipe connecting flange ii, a stop valve i, a stop valve ii and a ball valve are connected to the fuel system pipeline to be subjected to stress analysis, and the pipe connecting flange i weighs 1kg and has a length of 16 mm; the pipe connecting flange II is 2kg in weight and 18mm in length; the ball valve comprises 196.8mm of the total length of the mating flange and 13.74kg of total weight; the total length of the first stop valve and the second stop valve containing the mating flanges is 139.4mm, and the total weight is 8.6 kg. The ball valve is Q41F-150Lb-DN 40. Each stop valve is of the type J41H-150Lb-DN 20.
As a further improvement of the invention, the first pipe connecting flange is a fuel tank fuel supply port and a fuel return port pipe connecting flange with the model number of PL20(A) -16RF, and the second pipe connecting flange is a fuel filling port interface flange with the model number of PL40(A) -16 RF.
As a further improvement of the invention, an oil-water separator and a fixed support are further connected to a fuel system pipeline of the nuclear emergency diesel generating set, the oil-water separator is connected to the first stop valve and the emergency diesel generating set, the oil tank is arranged on the fixed support, a first stop valve and a second stop valve are arranged on an oil supply pipe, the second stop valve is connected to the oil tank through a pipeline and a connecting pipe flange, a ball valve is arranged on an oil filling pipe, and the oil filling pipe is connected to the oil tank through the connecting pipe flange.
As a further improvement of the present invention, in step S4, the technical parameters of the guide bracket include type, gap, rigidity and friction coefficient.
As a further improvement of the present invention, in step S5, the combination of operating conditions is L1: w + P1+ T1(OPE), L2: w + P1(SUS), L9: L1-L2 (EXP).
As a further improvement of the present invention, in step S6, the modal analysis of the fuel system pipeline is based on the analysis of the static pressure of the pipeline, the pipeline constraints and the pipeline parameters are not modified, and the natural frequency of the output pipeline at the cut-off frequency of 33HZ is calculated and is not lower than the 4HZ required by the standard.
As a further improvement of the invention, in step S7, according to SH/T3039-2018 'petrochemical engineering non-buried pipe to earthquake-resistant design Specification', earthquake intensity is 8 degrees, a horizontal earthquake influence coefficient is 0.32, and a vertical earthquake load influence coefficient is 0.2.
As a further improvement of the invention, in step S8, the combination of the seismic operating conditions is L3 to L8 and L10 to L21, wherein L3: w + T1+ P1+ U1, L4: w + T1+ P1-U1; l5: w + T1+ P1+ U2; l6: w + T1+ P1-U2; l7: w + T1+ P1+ U3; l8: w + T1+ P1-U3; l10 ═ L3-L1; l11 ═ L4-L1; l12 ═ L5-L1; l13 ═ L6-L1; l14 ═ L7-L1; l15 ═ L8-L1; l16 ═ L2+ L10; l17 ═ L2+ L11; l18 ═ L2+ L12; l19 ═ L2+ L13; l20 ═ L2+ L14; l21 ═ L2+ L15.
Compared with the prior art, the invention has the following beneficial effects: the method can analyze and evaluate the finite element stress of the nuclear power emergency diesel generator fuel system pipeline arrangement condition, ensures that the nuclear power emergency diesel generator fuel system pipeline is not damaged under 8-level earthquake, checks that the stress and the displacement of the nuclear power emergency diesel generator fuel system pipeline under the normal working condition and the accidental earthquake load condition meet the standard requirement, ensures that the nuclear power emergency diesel generator fuel system pipeline arrangement is extremely reasonable, and provides a basis for the design and the model selection of the support and hanger.
Drawings
FIG. 1 is a schematic diagram of a fuel system of a nuclear emergency diesel generating set according to one embodiment of the invention;
FIG. 2 is a schematic diagram of a nuclear emergency diesel generating set fuel system piping arrangement according to one embodiment of the invention;
FIG. 3 is a table of combinations of operating conditions;
FIG. 4 is a table of fuel system stress calculations;
FIG. 5 is a table of results of modal analysis of fuel piping;
FIG. 6 is a fuel tank nozzle stress gauge;
fig. 7 is a table of node 140 cradle loads.
The reference numbers in the figures illustrate: 1. an oil supply pipe; 2. an oil return pipe; 3. a first stop valve; 4. a second stop valve; 5. a ball valve; 6. an oil-water separator; 7. an oil tank; 8. a pipe connecting flange I; 9. a second pipe connecting flange; 10. a hose; 11. an oil filling pipe; 12. fixing a bracket; 13. and a guide bracket.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present application, it is to be understood that the terms "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the indicated orientations and positional relationships based on the orientation shown in the drawings for convenience in describing the application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and are not to be considered limiting of the application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The CAESARII pipeline stress analysis software is pressure pipeline stress analysis professional software developed by the American COADE company, and the CAESARII is originally loaded with the following components: w, WNC and WW are respectively the weight of the heat preservation and medium added to the pipe, the weight of the empty pipe and the weight of water in the pipe; t1, T2.. T9 is the operating temperature; HP is the hydrostatic test pressure, P1, P2.. P9 is the pipeline operating pressure; h is a spring, F1, F2.. F9 is a concentrated force/bending moment; d1, D2.. D9 is an additional displacement; CS is cold tightening or cold drawing; u1, U2 and U3 are uniformly distributed loads/seismic accelerations; WND1, WND 2.. WND4 is a wind load; WAVE1, WAVE2, WAVE4 is WAVE load. The working conditions are as follows: OPE (operating mode), HGR (spring design mode), SUS (continuous mode), FAT (fatigue mode), EXP (thermal expansion mode), OCC (accidental mode), HYD (hydrostatic test mode).
Example 1
As shown in fig. 1 and 2, the fuel system pipeline of the nuclear emergency diesel generator set provided by the invention comprises an oil supply pipe 01, an oil return pipe 02 and an oil injection pipe 11, wherein guide supports 13 are arranged on the oil supply pipe 01 and the oil return pipe 02, the positions of the guide supports 13 are arranged according to the span requirement of the pipeline, one end of the oil supply pipe 1 is directly or indirectly connected with the emergency diesel generator set, the other end of the oil supply pipe is directly or indirectly connected with an oil tank 7, one end of the oil return pipe 2 is directly or indirectly connected with the emergency diesel generator set, and the other end of the oil return pipe is directly or indirectly connected.
Referring to fig. 1 to 7, the method for analyzing and evaluating pipeline stress of the fuel system of the nuclear power emergency diesel generator comprises the following steps:
s1: inputting pipeline materials, temperature, pressure and allowable stress; the pipeline material A106GradB and the allowable stress are selected directly from CAESARII software, the density, the elastic modulus and the Poisson ratio of the pipeline material of the material under the corresponding temperature and pressure can be automatically read from a material library and the allowable stress is selected, and the research content is the fuel system pipeline of the nuclear emergency diesel generator set in the seismic zone, so the method follows the checking method of the design specification ASME B31.3 of the American process pipeline.
S2: and determining various technical parameters of the pipeline according to the design standard of the pressure pipeline, the requirements of plant layout and equipment installation. The technical parameters of the pipeline are as follows: the design pressure is 1000KPa, the outer diameters of an oil supply pipeline and an oil return pipeline are 26.7mm, the thickness is 2.87mm, the design temperature is 60 ℃, the outer diameter of an oil injection pipeline is 48.3mm, the thickness is 3.68mm, the design temperature is 20 ℃, and the density of fluid in the pipeline is 0.00084 kg./cu.cm.
S3: according to a three-dimensional pipeline axonometric diagram drawn by a piping engineer, carrying out finite element modeling on the pipeline by using CAESARII software and inputting parameters; a finite element model of a nuclear emergency diesel generating set fuel system pipeline is created by using CAESARII stress analysis software, a fuel tank 7, a fuel tank oil outlet, a fuel return port pipe connecting flange (a pipe connecting flange I8), a model PL20(A) -16RF, a single pipe with the weight of 1kg and the length of 16mm, a fuel filling port pipe connecting flange (a pipe connecting flange II 9), a model PL40(A) -16RF, a single pipe with the weight of 2kg and the length of 18mm, a ball valve 5 with the model Q41F-150Lb-DN40, a matched flange total length of 196.8mm, a total weight of 13.74kg, a stop valve II 4, a model J41H-150Lb-DN20, a matched flange total length of 139.4mm and a total weight of 8.6kg exist in a pipeline system needing stress analysis, the length and the weight of the valve and the flange can be simulated into a rigid piece, and the length and the weight of the valve and the flange can be. The oil tank 7 has two simulation methods: the first method is as follows: a rigid unit is established between the pipe orifice and the center of the oil tank 7, the outer diameter of the rigid unit is close to 1400mm of the outer diameter of the oil tank 7, and the weight of the rigid unit is 0; simulating the actual length of the oil tank 7 by using a pipe unit, wherein the outer diameter of the oil tank 7 is 1400mm, the wall thickness is 6mm, and a fixed support 12 is used for simulating a fixed supporting point of the oil tank 7; secondly, the stress of the pipe orifice of the oil tank 7 needs to be known, and the pipe orifice of the oil tank 7 needs to be provided with constraint, so that the constraint force is output at the node of the pipe orifice of the oil tank 7 during software calculation, and the CNOTE function is used when the constraint is added at the connecting point of the pipeline and the pipe orifice of the oil tank 7, so that the software can calculate the stress of the pipe orifice of the oil tank 7; the second method is as follows: all the simulation of the pipe orifice of the oil tank 7 is added with fixed constraint, and displacement constraint is added at a joint connected with a pipeline, wherein the displacement is the displacement of the oil tank 7 caused by thermal expansion and cold contraction and foundation settlement; the invention uses the first method or the second method, preferably the first method, and also uses the first modeling method for the equipment oil-water separator 6. The hose 10 is extremely rigid and is fully flexible with the pipe and is free.
S4: adding technical parameters of the guide bracket 13 in the finite element model; the technical parameters of the guide bracket 13 include type, clearance, rigidity, and friction coefficient. The acting force of the pipeline on the bracket is the main basis for the selection and design of the bracket in the emergency diesel generator fuel system.
S5: establishing a working condition combination, and performing primary stress check and secondary stress check on a fuel system pipeline; working condition combination L1: w + P1+ T1(OPE), L2: w + P1(SUS), L9: L1-L2 (EXP). Checking the primary stress of the pipeline, and preventing the pipeline from being plastically deformed and damaged due to overlarge primary stress so as to properly increase the number of the supporting and hanging frames; checking the secondary stress of the pipeline, preventing the pipeline from being damaged due to overlarge secondary stress and preventing the pipeline from being damaged due to fatigue under repeated loading, changing the direction of the pipeline, and selecting a corrugated pipe expansion joint and a spring support hanger; through calculation, the maximum displacement of the pipeline is 1.25mm under the operation condition (OPE), 8mm required in the process of pipeline design is met, and the falling of a support hanger and the mutual collision between pipelines caused by large pipeline displacement are avoided.
S6: performing pipeline modal analysis; the modal analysis of the fuel system pipeline is based on the pipeline static analysis, the pipeline constraint and the pipeline parameters are not modified on the basis, and the natural frequency 6.353HZ of the pipeline is output according to the cut-off frequency 33HZ during calculation and is higher than 4HZ required by the standard. The mode analysis is carried out on the fuel system pipeline, so that the vibration of the fuel system pipeline can be effectively reduced, the long pipeline with serious vibration is limited by researching the vibration mode of the pipeline under each order of mode, the guide support can be added in the pipeline, and the rigidity of the pipeline system in the specific direction is improved. The static analysis of the pipeline is not influenced by adding a small amount of guide supports in the pipeline system, so that primary stress and secondary stress analysis of the pipeline is not needed.
S7: performing anti-seismic analysis on a fuel system pipeline of the nuclear emergency diesel generating set by using an equivalent static method; the pipeline anti-seismic type is 1F, and the pipeline anti-seismic type is required to have anti-seismic capacity, and the specific method comprises the following steps: the equivalent static method is to input seismic Loads under a Uniform Loads functional module in CAESARII software, wherein a Vector1, a Vector2 and a Vector3 represent three directions of the seismic Loads, a Vector1 and a Vector2 respectively represent the X and Z directions of the horizontal seismic Loads, and a Vector3 represents the direction of the vertical seismic Loads. The load value is input in the form of G's, and the parameter is the ratio of the seismic load to the gravity of the structure, namely, alpha mg/mg-alpha, namely, the seismic influence coefficient is input. According to SH/T3039-2018 petrochemical engineering non-buried pipe to earthquake resistance design specification, the horizontal earthquake influence coefficient is 0.32 at 8 degrees of earthquake intensity, and the vertical earthquake load influence coefficient is 0.2.
S8: establishing earthquake working condition combination, carrying out finite element model calculation, and combining the earthquake working conditions: see FIG. 3, L3-L8, L10-L21;
s9: if the stress value and the displacement value are not in the allowable range, the steps S3-S7 are repeated until the result meets the specification requirement. The CAESARII software checks the displacement, constraint, force and stress of the fuel system pipeline of the emergency diesel generator set under all possible load working conditions under global or local coordinates, and the simulation result shows that the design of the fuel system pipeline of a certain emergency diesel generator set meets the ASME B31.3 standard requirement.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A nuclear emergency diesel generator set fuel system pipeline stress analysis and evaluation method is characterized in that a nuclear emergency diesel generator set fuel system pipeline comprises an oil supply pipe (1), an oil return pipe (2) and an oil injection pipe (11), guide supports (13) are arranged on the oil supply pipe (1), the oil return pipe (2) and the oil injection pipe (11), one end of the oil supply pipe (1) is directly or indirectly connected with an emergency diesel generator set, the other end of the oil supply pipe is directly or indirectly connected with an oil tank (7), one end of the oil return pipe (2) is directly or indirectly connected with the emergency diesel generator set, the other end of the oil return pipe is directly or indirectly connected with the oil tank (7), the nuclear emergency diesel generator set fuel system pipeline stress analysis and evaluation method comprises,
s1: inputting pipeline materials, temperature, pressure and allowable stress;
s2: determining the pipeline trend design according to the pressure pipeline design standard, the plant layout requirement and the equipment installation requirement, and determining various technical parameters of the pipeline;
s3: according to a three-dimensional pipeline axonometric diagram drawn by a piping engineer, carrying out finite element modeling on the pipeline by using CAESARII software and inputting parameters;
s4: adding technical parameters of a guide bracket (13) in the finite element model;
s5: establishing a working condition combination, and performing primary stress check and secondary stress check on a fuel system pipeline;
s6: performing pipeline modal analysis;
s7: inputting earthquake loads into a fuel system pipeline of a nuclear emergency diesel generating set, and performing earthquake simulation;
s8: establishing a seismic working condition combination, and calculating a finite element model;
s9: if the stress value and the displacement value are not in the allowable range, the steps S3-S7 are repeated until the result meets the specification requirement.
2. The method for analyzing and evaluating the stress of the pipeline of the fuel system of the nuclear emergency diesel generating set according to claim 1, wherein in the step S2, each technical parameter of the pipeline is as follows: the design pressure is 1000KPa, the outer diameter of the oil supply pipe (1) and the oil return pipe (2) is 26.7mm, the thickness is 2.87mm, and the design temperature is 60 ℃; the oil filling pipe (11) has an outer diameter of 48.3mm, a thickness of 3.68mm, a design temperature of 20 ℃ and a density of fluid inside the pipe of 0.00084 kg./cu.cm.
3. The stress analysis and evaluation method for the nuclear emergency diesel generator set fuel system pipeline is characterized in that in the step S3, a CAESARII stress analysis software is used for creating a finite element model of the nuclear emergency diesel generator set fuel system pipeline, a first pipe connecting flange (8), a second pipe connecting flange (9), a first stop valve (3), a second stop valve (4) and a ball valve (5) are connected to the fuel system pipeline needing stress analysis, and the first pipe connecting flange (8) is 1kg and 16mm in length; the second connecting pipe flange (9) weighs 2kg and has the length of 18 mm; the ball valve (5) comprises 196.8mm of the total length of a mating flange and 13.74kg of total weight; the first stop valve (3) and the second stop valve (4) comprise mating flanges, the total length of each of the mating flanges is 139.4mm, and the total weight is 8.6 kg.
4. The method for analyzing and evaluating the pipeline stress of the fuel system of the nuclear emergency diesel generating set according to claim 3, wherein the first pipe connecting flange (8) is a fuel tank oil supply port and a fuel return port pipe connecting flange with the model number of PL20(A) -16RF, and the second pipe connecting flange (9) is a fuel filling port interface flange with the model number of PL40(A) -16 RF.
5. The nuclear emergency diesel generating set fuel system pipeline stress analysis and evaluation method according to claim 3 or 4, characterized in that an oil-water separator (6) and a fixed support (12) are further connected to the nuclear emergency diesel generating set fuel system pipeline, the oil-water separator (6) is connected to the first stop valve (3) and the emergency diesel generating set, the oil tank (7) is arranged on the fixed support (12), the first stop valve (3) and the second stop valve (4) are arranged on the oil supply pipe (1), the second stop valve (4) is connected to the oil tank (7) through the pipeline and the first pipe connecting flange (8), the ball valve (5) is arranged on the oil filling pipe (11), and the oil filling pipe (11) is connected to the oil tank (7) through the second pipe connecting flange (9).
6. The method for analyzing and evaluating the pipeline stress of the fuel system of the nuclear emergency diesel generator set according to claim 1, wherein in the step S4, the technical parameters of the guide bracket (13) comprise type, gap, rigidity and friction coefficient.
7. The method for analyzing and evaluating the pipeline stress of the fuel system of the nuclear emergency diesel generating set according to claim 1, wherein in the step S5, the working condition combination is L1: w + P1+ T1(OPE), L2: w + P1(SUS), L9: L1-L2 (EXP).
8. The method for analyzing and evaluating the stress of the fuel system pipeline of the nuclear emergency diesel generating set according to claim 1, wherein in the step S6, the modal analysis of the fuel system pipeline is based on the pipeline static analysis, the pipeline constraint and the pipeline parameters are not modified, and the natural frequency of the output pipeline is calculated according to the cut-off frequency 33HZ and is not lower than the 4HZ required by the standard.
9. The method for analyzing and evaluating the pipeline stress of the fuel system of the nuclear emergency diesel generator set according to claim 6, wherein in the step S7, the earthquake intensity is 8 degrees, the horizontal earthquake influence coefficient is 0.32, and the vertical earthquake load influence coefficient is 0.2.
10. The method for analyzing and evaluating pipeline stress of the fuel system of the nuclear emergency diesel generating set according to claim 1, wherein in the step S8, the combination of earthquake working conditions is L3-L8 and L10-L21, wherein L3: w + T1+ P1+ U1, L4: w + T1+ P1-U1; l5: w + T1+ P1+ U2; l6: w + T1+ P1-U2; l7: w + T1+ P1+ U3; l8: w + T1+ P1-U3; l10 ═ L3-L1; l11 ═ L4-L1; l12 ═ L5-L1; l13 ═ L6-L1; l14 ═ L7-L1; l15 ═ L8-L1; l16 ═ L2+ L10; l17 ═ L2+ L11; l18 ═ L2+ L12; l19 ═ L2+ L13; l20 ═ L2+ L14; l21 ═ L2+ L15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011377503.2A CN112613203A (en) | 2020-11-30 | 2020-11-30 | Pipeline stress analysis and evaluation method for fuel system of nuclear emergency diesel generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011377503.2A CN112613203A (en) | 2020-11-30 | 2020-11-30 | Pipeline stress analysis and evaluation method for fuel system of nuclear emergency diesel generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112613203A true CN112613203A (en) | 2021-04-06 |
Family
ID=75228295
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011377503.2A Pending CN112613203A (en) | 2020-11-30 | 2020-11-30 | Pipeline stress analysis and evaluation method for fuel system of nuclear emergency diesel generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112613203A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113312828A (en) * | 2021-07-29 | 2021-08-27 | 江铃汽车股份有限公司 | Method for judging integrity of automobile fuel pipeline |
| CN114329982A (en) * | 2021-12-29 | 2022-04-12 | 中煤科工集团武汉设计研究院有限公司 | Coal slurry pipeline load calculation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130096775A (en) * | 2012-02-20 | 2013-09-02 | 제이씨이엔씨(주) | Optimal determination of pipe support types in flare system |
| CN110674602A (en) * | 2019-09-25 | 2020-01-10 | 中车大连机车车辆有限公司 | Design method and strength simulation analysis method for main transformer oil tank of locomotive |
| CN112001051A (en) * | 2020-08-27 | 2020-11-27 | 湛江南海西部石油勘察设计有限公司 | Piping design method for large-displacement trestle |
-
2020
- 2020-11-30 CN CN202011377503.2A patent/CN112613203A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20130096775A (en) * | 2012-02-20 | 2013-09-02 | 제이씨이엔씨(주) | Optimal determination of pipe support types in flare system |
| CN110674602A (en) * | 2019-09-25 | 2020-01-10 | 中车大连机车车辆有限公司 | Design method and strength simulation analysis method for main transformer oil tank of locomotive |
| CN112001051A (en) * | 2020-08-27 | 2020-11-27 | 湛江南海西部石油勘察设计有限公司 | Piping design method for large-displacement trestle |
Non-Patent Citations (4)
| Title |
|---|
| 何志, 倪向贵, 徐洲: "高温高压工艺管道应力分析计算", 压力容器, no. 06, pages 18 - 22 * |
| 张海鹏;: "汽车油箱设计及分析", 汽车与配件, no. 09, pages 70 - 71 * |
| 徐俊: ""基于CAESAR_Ⅱ的核应急发电机组辅机系统管道应力分析"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑(月刊)》, no. 3, pages 20 - 22 * |
| 钟文英;雷平和;刘利;: "1000MW直接空冷机组排汽管道CAESARⅡ整体应力分析", 电力建设, no. 02, pages 62 - 64 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113312828A (en) * | 2021-07-29 | 2021-08-27 | 江铃汽车股份有限公司 | Method for judging integrity of automobile fuel pipeline |
| CN114329982A (en) * | 2021-12-29 | 2022-04-12 | 中煤科工集团武汉设计研究院有限公司 | Coal slurry pipeline load calculation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112613203A (en) | Pipeline stress analysis and evaluation method for fuel system of nuclear emergency diesel generating set | |
| Zou et al. | Response of a submerged floating tunnel subject to flow-induced vibration | |
| WO2022011726A1 (en) | Ansys-based heat exchanger tube bundle modal analysis method in liquid filling state | |
| Kim et al. | 3-D numerical simulations of subsea jumper transporting intermittent slug flows | |
| Wu et al. | Optimization of nonlinear pressure-flow characteristics of a spring-loaded pressure relief valve based on computational fluid dynamics simulation | |
| Paolacci et al. | Seismic design criteria of refinery piping systems | |
| CN112001051B (en) | Piping design method of large-displacement trestle | |
| CN106484985A (en) | Circuit design method based on computer-aided engineering emulation technology | |
| CN115560938A (en) | Flow induced vibration testing apparatus, method, computer device, storage medium and product | |
| Albanesi et al. | Nonlinear dynamic verification of the boron injection lances for the Atucha-I Nuclear Power Plant | |
| Bursi et al. | Seismic performance assessment of oil & gas piping system through nonlinear analysis | |
| Vivaldi | Fluid-Structure Simulations of Vortex Shedding Induced Vibrations on Two In-Line Cylinders in Water Cross-Flow | |
| Zhao et al. | Dynamic Analysis of an Offshore Platform With Compressor Packages—Application of the Substructure Method | |
| Cicognani et al. | Key issues in European reactor seismic design | |
| CN115563733A (en) | Automatic load calculation and analysis method and system for air pipe support of nuclear power plant | |
| Salman et al. | Effect of Head Types on the Free Vibration and Fatigue for Horizontal LPG Pressure Vessels | |
| Cademartori et al. | Seismic Design of Jumpers: The Coupling Conundrum | |
| Liu et al. | Dynamic modeling and stress reduction optimization of parallel pipelines based on pipe-solid element coupling | |
| Brown | Nonlinear analysis of LWR components: areas of investigation/benefits/recommendations | |
| Eijk et al. | Extensive optimisation analyses of the piping of two large underground gas storage ariel compressors | |
| Loic et al. | Seismic Design Of Wells | |
| Shin et al. | User’s Manual for the Sodium-Water Reaction Analysis Computer Code SWAAM-II | |
| Tijsseling | Fluid-structure interaction in liquid-filled pipe systems: sources, solutions and unsolved problems | |
| Zhang et al. | Vibration Characteristics of Crude Oil Pipeline Considering Fluid-solid Coupling Effect | |
| Giacomelli et al. | Forced Responce of Cylinder Manifold for Reciprocating Compressor Applications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |