CN115481453A - Logging instrument shell finite element analysis method and device - Google Patents
Logging instrument shell finite element analysis method and device Download PDFInfo
- Publication number
- CN115481453A CN115481453A CN202211152164.7A CN202211152164A CN115481453A CN 115481453 A CN115481453 A CN 115481453A CN 202211152164 A CN202211152164 A CN 202211152164A CN 115481453 A CN115481453 A CN 115481453A
- Authority
- CN
- China
- Prior art keywords
- analysis
- shell
- model
- finite element
- assembly
- 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
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
-
- 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
- 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)
- General Physics & Mathematics (AREA)
- Geometry (AREA)
- Evolutionary Computation (AREA)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Optimization (AREA)
- Mathematical Analysis (AREA)
- Computational Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a finite element analysis method and a finite element analysis device for a logging instrument shell. The method comprises the following steps: selecting an assembly body of a shell and a joint of a logging instrument as an analysis object, establishing an analysis model according to the assembly body, and performing axial symmetry simplification processing on the analysis model of the assembly body by using the characteristics that the shell is a revolving body and the shell bears symmetrical load when the analysis model is established; simulating a well environment, and applying an external load to the analysis model; and obtaining the stress value of the region of interest in the assembly body through finite element analysis. According to the technical scheme, an assembly body formed by the shell and the joint is selected to be modeled to analyze a weaker concerned area on the shell, and then finite element analysis on an analysis model is utilized to obtain strength analysis and check of the weak area; and the analysis model is simplified in an axisymmetric mode, the analysis and calculation time is reduced, and the efficiency and the accuracy of finite element analysis of the logging instrument shell are improved.
Description
Technical Field
The invention relates to the technical field of logging application, in particular to a finite element analysis method and a finite element analysis device for a logging instrument shell.
Background
The logging tool works in mud downhole, the periphery of which is subjected to the pressure of the mud, well fluid, etc. Inside the logging tool are typically electronics and sensors. To protect the electronics and sensors from external pressure, a pressurized housing, joints, and seals are typically assembled to withstand the external mud pressure. The pressure-bearing housing serves as the primary load-bearing part and, if excessively deformed or damaged, can cause damage to the internal electronics and sensors, requiring a check on their strength.
At present, two methods are used for checking the strength of the steel plate, the first method is to use a thick-wall cylinder formula for calculation, but due to the limitation of the application conditions of the formula, the formula can only accurately calculate the maximum stress of the equal-thickness part with a longer middle part. The second method is to use general finite element analysis software to carry out plane strain simplification on the middle equal-thickness part to obtain the maximum stress value. Both methods can obtain relatively accurate results in the calculation of the middle equal thickness part. However, the weakest point is the large diameter of the thread root or the thread relief groove or the sealing surface when viewed from the structure of the pressure-bearing shell, and the wall thickness of the areas is thinner. Neither of the above two methods achieves intensity calculation for the above region.
Disclosure of Invention
In view of the above, the present invention has been developed to provide a logging tool housing finite element analysis method and apparatus that overcomes, or at least partially addresses, the above-identified problems.
According to one aspect of the invention, there is provided a logging tool housing finite element analysis method, the method comprising:
selecting an assembly body of a shell and a joint of a logging instrument as an analysis object, establishing an analysis model according to the assembly body, and performing axial symmetry simplification processing on the analysis model of the assembly body by using the characteristics that the shell is a revolving body and the shell bears symmetrical load when the analysis model is established;
simulating a well environment, and applying an external load to the analysis model;
and obtaining the stress value of the region of interest in the assembly body through finite element analysis.
Optionally, the axial symmetry simplification of the analysis model of the assembly by using the characteristics that the shell is a revolving body and the shell bears load symmetrically specifically includes:
based on the characteristic that the shell and the load are axisymmetric, a half area or a quarter area of a cross section of the assembly body parallel to the axis is selected to obtain a sheet body, and the sheet body is used as an analysis object to simplify the analysis model.
Optionally, the establishing an analysis model according to the assembly further comprises:
establishing a quarter model of the section surface body of the shell;
establishing a quarter model of a section surface body of the joint;
and assembling the quarter model of the section surface body of the shell and the quarter model of the section surface body of the joint to obtain an analysis model.
Optionally, obtaining the stress value of the region of interest in the assembly body through finite element analysis further comprises:
and determining corresponding strain values according to the stress values of the regions of interest, the materials of the regions of interest and the assembly relation.
Optionally, the region of interest includes a shell intermediate equal wall thickness region, a thread root region, a relief groove region, and/or a sealing surface region.
Optionally, selecting an assembly of a casing and a joint of the logging instrument as an analysis object, and establishing an analysis model according to the assembly includes:
modeling the threads, relief notches, sealing surfaces, and chamfered regions in the region of interest to improve accuracy of analytical modeling.
Optionally, the method further includes:
and checking the strength of the assembly according to the stress value, and recommending the material and the size of the assembly according to a checking result.
According to another aspect of the invention, there is provided a logging tool casing finite element analysis device, the device comprising:
the model establishing module is suitable for selecting a shell of a logging instrument and an assembly body of a joint as an analysis object, establishing an analysis model according to the assembly body, and performing axial symmetry simplification processing on the analysis model of the assembly body by utilizing the characteristic that the shell is a revolving body and the shell bears symmetrical load when the analysis model is established;
the load loading module is suitable for simulating the environment in the well and applying external load to the analysis model;
and the stress analysis module is suitable for obtaining the stress value of the region of interest in the assembly body through finite element analysis.
According to yet another aspect of the present invention, there is provided a computing device comprising: the system comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete mutual communication through the communication bus;
the memory is used for storing at least one executable instruction, and the executable instruction enables the processor to execute the operation corresponding to the logging instrument shell finite element analysis method.
According to yet another aspect of the present invention, a computer storage medium is provided having at least one executable instruction stored therein, the executable instruction causing a processor to perform operations corresponding to the above-described logging tool housing finite element analysis method.
According to the finite element analysis method and the corresponding device of the logging instrument shell, firstly, the pressure-bearing shell of the logging instrument and the assembly body of the joint are selected to serve as an analysis modeling object instead of only selecting the shell, so that the comprehensiveness of model influence factors is improved, and the analysis model of the assembly body is subjected to axial symmetry simplification by using the characteristic that the shell is a revolving body and the shell bears load symmetry, so that the subsequent finite element analysis and calculation workload is reduced on the whole, and the efficiency is improved; and then applying external load to the analysis model by comparing the environment in the well, carrying out simulation and finite element analysis operation, and obtaining the stress value of the region of interest in the assembly body. Therefore, according to the technical scheme, the assembly body is modeled, and the axisymmetric simplified model is utilized, so that the beneficial effects of reducing the analysis and calculation time and improving the efficiency and accuracy of finite element analysis of the logging instrument shell are achieved.
The above description is only an overview of the technical solutions of the present invention, and the present invention can be implemented in accordance with the content of the description so as to make the technical means of the present invention more clearly understood, and the above and other objects, features, and advantages of the present invention will be more clearly understood.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 illustrates a flow chart of a method of finite element analysis of a logging tool housing provided in one embodiment of the present invention;
fig. 2 is a schematic structural diagram illustrating an assembly of a housing and a joint provided in an embodiment of the present invention;
FIG. 3 illustrates a schematic structural view of an analytically modeled sheet provided in an embodiment of the invention;
FIG. 4 is a schematic diagram illustrating a structure of a region of interest in an analytical modeling structure provided in an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a recommendation grid in an analytical modeling structure provided in an embodiment of the present invention;
FIG. 6 illustrates a schematic structural diagram of a finite element analysis apparatus of a logging tool housing provided in an embodiment of the present invention;
FIG. 7 illustrates a block diagram of a computing device provided in one embodiment of the invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
FIG. 1 is a flow chart of an embodiment of a finite element analysis method of a logging tool housing for use in a computing device according to the present invention. The computing device comprises a server, a PC (personal computer), a notebook computer, a tablet computer and the like. As shown in fig. 1, the method comprises the steps of:
step 110: the method comprises the steps of selecting an assembly body of a pressure-bearing shell and a joint of a logging instrument as an analysis object, establishing an analysis model according to the assembly body, and carrying out axisymmetric simplification on the analysis model of the assembly body by utilizing the characteristic that the shell is a revolving body and the shell bears symmetrical load during modeling.
In fig. 2, the connection structure of an assembly body composed of a housing and a joint shown in fig. 2 includes a joint 1, a seal ring 2, a seal surface 3, a connection thread 4, a relief groove 5, and a pressure-bearing housing 6. A pressure-bearing shell 6 in the logging instrument is a cylinder with the middle being equal in wall thickness, the two ends of the pressure-bearing shell are structurally a thread and a sealing surface, a tool withdrawal groove is further designed at the tail end of the thread on part of the pressure-bearing shell, a matched joint and a sealing ring form an internal closed cavity, and the inside of the cavity is usually used for containing electronic circuits and sensors. Therefore, the region forms a weak region that receives an external load, and therefore, this embodiment of the present invention particularly selects an assembly body composed of a housing and a joint as an analysis object to model, thereby obtaining more comprehensive modeling basic information including the region.
In consideration of the characteristic that most of the pressure-bearing shell of the logging instrument is a revolving body, for example, the shell is mostly a cylindrical, conical or truncated cone-shaped revolving body, and the like, and the load borne by the revolving body is also axisymmetric, therefore, in order to simplify the analysis model, part of the structure of the assembly body is selected for analysis through axisymmetric analysis, so that the workload of analysis and calculation is reduced.
Step 120: and simulating the environment in the well, and applying external load to the analysis model.
After modeling is completed, the actual condition of extrusion of liquid and the like in the well on the logging instrument is simulated, and an external load acting force is applied to the analysis model so as to facilitate further analysis and calculation.
Step 130: and obtaining the stress value of the region of interest in the assembly body through finite element analysis.
Finite element analysis is carried out on an assembly body formed by the casing and the joint of the logging instrument by utilizing an algorithm, and particularly, stress values of the casing are calculated iteratively by preferably adopting a Newton-Laplacian method for key attention areas in connecting parts at two ends of the casing.
It should be noted that Finite Element Analysis (FEA) utilizes mathematical approximation to simulate real physical systems (geometry and load conditions). With simple and interacting elements (i.e., cells), a finite number of unknowns can be used to approximate a real system of infinite unknowns. Finite element analysis is to solve a complex problem by replacing it with a simpler one. It considers the solution domain as consisting of a number of small interconnected subdomains called finite elements, assuming a suitable (simpler) approximate solution for each element, and then deducing the overall satisfaction of the solution domain (e.g. structural equilibrium) to arrive at a solution to the problem. This solution is not an exact solution, but an approximate solution, since the actual problem is replaced by a simpler problem. Most practical problems are difficult to obtain accurate solutions, and finite elements not only have high calculation precision, but also can adapt to various complex shapes, so the method becomes an effective engineering analysis means. The common finite element software used for finite element analysis is ANSYS, SDRC/I-DEAS, etc.
In conclusion, the embodiment of the invention realizes the simulation and emulation of the concerned area on the shell by selecting the proper modeling object and the analysis simplification method, simplifies the model in an axisymmetric mode, and has the advantages of reducing the analysis and calculation time and improving the efficiency and the accuracy of finite element analysis of the logging instrument shell.
In one or some embodiments, the performing, in step 110, axisymmetric simplification on the analysis model of the assembly by using the feature that the casing is a revolving body and the casing bears load symmetrically specifically includes: based on the characteristic that the shell and the load are axisymmetric, a half area of a cross section of the assembly body parallel to the axis is selected to obtain a sheet body, and the sheet body is used as an analysis object to simplify the analysis model.
Thus, the embodiment allows for an axisymmetric simplification of the casing assembly of the logging tool, and a complete symmetry simplification since both ends of the logging tool are also symmetric. In this embodiment, the analytical model may be a half or quarter sheet in a cross section parallel to the axis.
Thus, the step 110 of building an analytical model from the assembly further comprises:
establishing a quarter model of the section surface body of the shell;
establishing a quarter model of a section surface body of the joint;
and assembling the quarter model of the section surface body of the shell and the quarter model of the section surface body of the joint to obtain an analysis model.
An example of a sheet structure modeled according to the analysis shown in figure 3. Wherein A is the left end point, the pressures at B, C and D are 140Mpa, E is the area of the sealing surface of the shell and the joint, the contact type of the area is no separation, F is the area of the thread pair, and the contact type is also no separation. Thus, a quarter model of the housing cross section was created according to fig. 3, the structure of which includes the thread, the relief groove and the sealing surface.
After modeling, the stress value of each region of interest is calculated in step 130 according to the applied simulated load.
It is emphasized that the final analytical model is preferably created on a sheet basis, and therefore, in determining the boundary conditions of the finite element analysis, it is necessary to introduce symmetry constraints into the analytical model to avoid significant distortion during the finite element analysis calculation. Of course, other constraints such as material properties of the housing and the joint, including setting elastic modulus, poisson's ratio, and material yield strength, need to be introduced into the model and will not be described in detail herein.
In a preferred embodiment, the obtaining stress values of the region of interest in the assembly by finite element analysis in step 130 further comprises:
and determining corresponding strain values according to the stress values of the regions of interest, the materials of the regions of interest and the assembly relation.
In order to evaluate the magnitude of the strain induced in the assembly from the stress values obtained in step 130, the strain values of the shell and/or the joint are computationally determined based on the stress values, the materials and the assembly connection relationship for use in finite element analysis results.
Preferably, the region of interest includes a shell intermediate equal wall thickness region, a thread root region, a relief groove region, and/or a sealing surface region.
The areas of interest include areas of equal wall thickness in the middle portion of the housing, as well as areas of weakness such as thread root areas, relief groove areas, and sealing surface areas.
In one or some embodiments, the step 110 of selecting an assembly of the pressure-bearing casing of the logging tool and the joint as an analysis object, and the establishing an analysis model according to the assembly further includes:
modeling the threads, the notch of the tool withdrawal groove, the sealing surface and the chamfer area in the concerned area so as to improve the accuracy of analysis modeling;
and obtaining a stress value of a region of interest in the assembly by finite element analysis comprises:
and calculating the stress value of each concerned area through finite element analysis by taking the external load and the symmetric constraint applied to the analysis model by the well environment as boundary conditions.
In order to obtain a more precise modeling result, modeling needs to be carried out on the threads in the thread pair, the notches at the tool withdrawal grooves, the sealing surfaces and even the chamfers in the modeling process, so that richer data are prepared for subsequent finite element analysis and calculation, and the accuracy of the analysis and calculation is improved. By focusing on the regions, the simulation and emulation of the weakest joint region are realized, and the strength requirement of the weak region can be analyzed and calculated.
In one or some embodiments, the method further comprises:
and checking the strength of the assembly body according to the stress value, and recommending the material and the size of the assembly body according to a checking result.
In this embodiment, the material and size of the housing and the joint in the assembly are recommended using the strength check result of the assembly such as the housing. Specifically, the recommended level may be established according to the strength check result, and the corresponding size information such as the material and the assembly ratio may be recommended to the designer or the like according to the recommended level table.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
In a particular embodiment, referring to FIG. 4, in selecting an analytical modeling object, the following regions of interest are preferentially selected: region 1, the middle region of the housing, the middle region being thicker in wall but larger in support span; region 2, the wall thickness of the large diameter of the thread is thin; region 3, thin wall of seal face; region 4, relief (not shown).
Modeling and analyzing and calculating according to the figure 4 and the important attention area, wherein the detailed steps comprise:
step a, establishing a quarter model of the shell section body, wherein the structure comprises a shell middle area, a thread, a tool withdrawal groove, a sealing surface and the like.
And b, establishing a quarter model of the section of the joint model, wherein the structure comprises threads and a sealing surface.
And c, assembling the shell body and the joint body model together, and storing the shell body and the joint body model into an intermediate format.
And d, importing the assembled model into a static analysis module of finite element software.
And e, setting the analysis type to be 2D axial symmetry.
And f, setting the properties of the shell material, including setting the elastic modulus, the Poisson ratio, the material yield strength and the like.
And h, setting the properties of the joint material, including setting the elastic modulus, the Poisson ratio, the yield strength of the material and the like.
And i, setting an inner diameter borderline of the middle wall thickness as a display path.
And j, setting the inner diameter borderline of the tool withdrawal groove as a display path.
And k, setting the inner diameter borderline of the large diameter of the thread as a display path.
And step l, setting an inner diameter sideline of the sealing surface as a display path.
And m, setting contact of the sealing surface, wherein the contact type is non-separation.
And n, setting the contact of the thread profile side faces, wherein the contact type is no separation.
And step o, setting end face contact, wherein the contact type is non-separation.
And p, uniformly distributing pressure on the outer side of the loading shell (B, C and D in the figure 3).
And step q, setting symmetrical edge symmetrical constraint (edge A in figure 3).
And r, setting the type of the grid as a quadrangle or a triangle.
And step s, encrypting the contact area grid, and recommending the grid size to be less than 0.2mm.
And t, encrypting the root fillets of the threads, wherein the recommended grid size is less than 0.2mm.
And u, encrypting the root of the tool withdrawal groove, wherein the recommended grid size is less than 0.2mm, and the grid structure is shown in figure 5.
And v, solving and calculating.
And w, extracting equivalent stress on paths i, j, k and l.
And x, extracting the displacement on the paths i, j, k and l in the radial direction.
And step y, solving the safety coefficient according to the allowable stress of the material.
Through the specific embodiment, compared with the traditional method, the accuracy of the calculation result is improved by more than 30%, the time and cost spent on modeling analysis are greatly reduced, and the expected effect is obtained.
FIG. 6 is a schematic diagram of a finite element analysis apparatus of a logging tool casing according to an embodiment of the present invention. The device is applied to computing equipment, and the computing equipment comprises a server, a PC (personal computer), a notebook computer, a tablet computer and the like. As shown in fig. 6, the apparatus 600 includes:
the model establishing module 610 is suitable for selecting an assembly body of a pressure-bearing shell and a joint of a logging instrument as an analysis object, establishing an analysis model according to the assembly body, and performing axisymmetric simplification on the analysis model of the assembly body by using the characteristic that the shell is a revolving body and the shell bears symmetrical load when the analysis model is established.
In combination with the connection structure of the assembly body composed of the housing and the joint shown in fig. 2, generally, the pressure-bearing housing in the logging instrument is a cylinder with the middle being equal in wall thickness, the structures at the two ends are threads and sealing surfaces, and a relief groove is further designed at the tail end of the threads on part of the pressure-bearing housing. Therefore, the region forms a weak region that receives an external load, and therefore, this embodiment of the present invention selects an assembly body composed of a housing and a joint as an analysis object to model, thereby obtaining more comprehensive modeling basic information including the region.
In consideration of the characteristic that most of the pressure-bearing shell of the logging instrument is a revolving body, for example, the shell is mostly a cylindrical, conical or truncated cone-shaped revolving body, and the like, and the load borne by the shell is also axisymmetric, therefore, in order to simplify the analysis model, part of the assembly structure is selected for analysis through axisymmetric analysis, and thus, the workload of analysis and calculation is reduced.
The load loading module 620: and the method is suitable for simulating the environment in the well and applying external load to the analysis model.
After modeling is completed, the actual condition of extrusion of liquid and the like in the well on the logging instrument is simulated, and an external load acting force is applied to the analysis model so as to facilitate further analysis and calculation.
Stress analysis module 630: and obtaining the stress value of the region of interest in the assembly body through finite element analysis.
Finite element analysis is carried out on an assembly body formed by the casing and the joint of the logging instrument by utilizing an algorithm, and particularly, stress values of the casing can be calculated iteratively in a Newton-Laplacian method for key regions of interest in connecting parts at two ends of the casing.
In summary, the device disclosed in this embodiment of the present invention, through selecting a suitable modeling object and analyzing the simplified module, realizes simulation and emulation of a weak region (such as a thread root major diameter, a thread relief groove or a sealing surface) concerned on the casing, and simplifies the model in an axisymmetric manner, thereby obtaining beneficial effects of reducing analysis and calculation time and improving efficiency and accuracy of finite element analysis of the logging instrument casing.
In one or some embodiments, the model building module 610 is specifically adapted to:
based on the characteristic that the shell and the load are axisymmetric, a half area of a cross section of the assembly body parallel to the axis is selected to obtain a sheet body, and the sheet body is used as an analysis object to simplify the analysis model.
Thus, the embodiment allows for an axisymmetric simplification of the casing assembly of the logging tool, and a complete symmetry simplification since both ends of the logging tool are also symmetric. In this embodiment, the analytical model may be a half-sheet on any interface parallel to the axis.
Thus, in one embodiment, the building of an analytical model from the assembly in the model building module 610 further comprises:
establishing a quarter model of a section surface body of the shell;
establishing a quarter model of a section surface body of the joint;
and assembling the quarter model of the section surface body of the shell and the quarter model of the section surface body of the joint to obtain an analysis model.
It should be noted that the final analysis model is preferably created based on a sheet body, and therefore, when determining the boundary conditions of the finite element analysis, a symmetry constraint needs to be introduced into the analysis model to avoid generating significant distortion during the finite element analysis calculation.
In a preferred embodiment, the stress analysis module 630 is further adapted to:
and determining corresponding strain values according to the stress values of the regions of interest, the materials of the regions of interest and the assembly relation.
In order to evaluate the magnitude of the strain generated by the assembly from the stress values obtained by the stress analysis module 630, the strain values of the shell and/or the joint are calculated and determined according to the stress values, the material and the assembly connection relationship, and are used for analyzing the finite element analysis results.
Preferably, the region of interest includes a shell middle equal wall thickness region, a thread root region, a relief groove region, and/or a sealing surface region.
The regions of interest include regions of equal wall thickness in the middle portion of the housing, as well as regions of weakness such as thread root regions, relief groove regions, and sealing surface regions.
In one or some embodiments, the model building module 610 is further adapted to:
modeling the threads, the notch of the tool withdrawal groove, the sealing surface and the chamfering area in the region of interest so as to improve the accuracy of analysis modeling;
and the stress analysis module 630 is further adapted to:
and taking the external load and the symmetric constraint applied by the well environment to the analysis model as boundary conditions, and calculating the stress value of each concerned area through finite element analysis.
In order to obtain a more precise modeling result, modeling needs to be carried out on the threads in the thread pair, notches at the tool withdrawal grooves, sealing surfaces and even chamfers in the modeling process, so that richer data are prepared for subsequent finite element analysis and calculation, and the accuracy of analysis and calculation is improved.
In one or some embodiments, the apparatus further comprises a check recommendation module, which is specifically adapted to:
and checking the strength of the assembly body according to the stress value, and recommending the material and the size of the assembly body according to a checking result.
In this embodiment, the material and size of the housing and the joint in the assembly are recommended using the strength check result of the assembly such as the housing. Specifically, the recommended grade may be established according to the strength check result, and the size information such as the corresponding material and the assembly ratio may be recommended to the designer or the like according to the recommended grade table.
In summary, according to the finite element analysis method and the corresponding device for the casing of the logging instrument disclosed in the embodiments of the present invention, the pressure-bearing casing of the logging instrument and the assembly body of the joint are selected as the analysis modeling object, instead of selecting only the casing as the analysis modeling object, so that the comprehensiveness of the model influence factors is improved, and the analysis model of the assembly body is simplified in axial symmetry by using the characteristic that the casing is symmetrical with respect to the load borne by the revolving body and the casing, so that the subsequent finite element analysis and calculation workload is reduced as a whole, and the efficiency is improved; and then applying external load to the analysis model by comparing the environment in the well, carrying out simulation and finite element analysis operation, and obtaining the stress value of the region of interest in the assembly body. Therefore, the technical scheme realizes the simulation and emulation of the important attention area, and is beneficial to analyzing and calculating the strength requirement and the structure improvement direction of the weak area; and the beneficial effects of reducing analysis and calculation time and improving the efficiency and the accuracy of finite element analysis of the casing of the logging instrument are achieved by simplifying the model through axial symmetry.
Embodiments of the present invention provide a non-transitory computer storage medium storing at least one executable instruction that may perform a method of finite element analysis of a logging instrument housing as in any of the above method embodiments.
Fig. 7 is a schematic structural diagram of an embodiment of a computing device according to the present invention, and the specific embodiment of the present invention does not limit the specific implementation of the computing device.
As shown in fig. 7, the computing device may include: a processor (processor) 702, a Communications Interface 704, a memory 706, and a communication bus 708.
Wherein: the processor 702, communication interface 704, and memory 706 communicate with each other via a communication bus 708. A communication interface 704 for communicating with network elements of other devices, such as clients or other servers. The processor 702, configured to execute the program 710, may specifically perform the steps associated with the above-described embodiments of a method for finite element analysis of a tool housing for a computing device.
In particular, the program 710 may include program code that includes computer operating instructions.
The processor 702 may be a central processing unit CPU, or an Application Specific Integrated Circuit ASIC (Application Specific Integrated Circuit), or one or more Integrated circuits configured to implement an embodiment of the present invention. The computing device includes one or more processors, which may be the same type of processor, such as one or more CPUs; or may be different types of processors such as one or more CPUs and one or more ASICs.
The memory 706 stores a program 710. The memory 706 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.
The program 710 may be specifically configured to cause the processor 702 to perform the following operations corresponding to the embodiments of the logging tool casing finite element analysis method described above.
The algorithms or displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system is apparent from the description above. In addition, embodiments of the present invention are not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the invention and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components in the embodiments may be combined into one module or unit or component, and furthermore, may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
Various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functionality of some or all of the components according to embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website, or provided on a carrier signal, or provided in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names. The steps in the above embodiments should not be construed as limited to the order of execution unless otherwise specified.
Claims (10)
1. A logging instrument housing finite element analysis method, the method comprising:
selecting a shell of a logging instrument and an assembly body of a joint as an analysis object, establishing an analysis model according to the assembly body, and performing axisymmetric simplification processing on the analysis model of the assembly body by using the characteristics that the shell is a revolving body and the shell bears load symmetrically when the analysis model is established;
simulating a well environment, and applying an external load to the analysis model;
and obtaining the stress value of the region of interest in the assembly body through finite element analysis.
2. The method of claim 1, wherein the axial symmetry simplification of the analytical model of the assembly using the characteristics of the shell being a solid of revolution and the shell bearing load symmetry comprises:
based on the characteristic that the shell and the load are axisymmetric, a half area or a quarter area of a cross section of the assembly body parallel to the axis is selected to obtain a sheet body, and the sheet body is used as an analysis object to simplify the analysis model.
3. The method of claim 1 or 2, wherein said building an analytical model from said assembly further comprises:
establishing a quarter model of a section surface body of the shell;
establishing a quarter model of a section surface body of the joint;
and assembling the quarter model of the section surface body of the shell and the quarter model of the section surface body of the joint to obtain an analysis model.
4. The method of claim 1 or 2, wherein obtaining stress values for regions of interest in the assembly via finite element analysis further comprises:
and determining corresponding strain values according to the stress values of the regions of interest, the materials of the regions of interest and the assembly relation.
5. The method of claim 4, wherein the region of interest comprises a shell mid-wall thickness zone, a thread root zone, a relief groove zone, and/or a sealing face zone.
6. The method of claim 5, wherein selecting an assembly of a housing and a joint of a logging tool as an analysis object, and wherein building an analysis model from the assembly comprises:
modeling the threads, the notch of the tool withdrawal groove, the sealing surface and the chamfering area in the region of interest so as to improve the accuracy of analysis modeling;
and obtaining a stress value for a region of interest in the assembly by finite element analysis further comprises:
and calculating the stress value of each concerned area through finite element analysis by taking the external load and the symmetric constraint applied to the analysis model by the well environment as boundary conditions.
7. The method according to claim 1 or 2, characterized in that the method further comprises:
and checking the strength of the assembly body according to the stress value, and recommending the material and the size of the assembly body according to a checking result.
8. A logging instrument housing finite element analysis device, the device comprising:
the model establishing module is suitable for selecting a shell of a logging instrument and an assembly body of a joint as an analysis object, establishing an analysis model according to the assembly body, and performing axial symmetry simplification processing on the analysis model of the assembly body by utilizing the characteristic that the shell is a revolving body and the shell bears symmetrical load when the analysis model is established;
the load loading module is suitable for simulating the environment in the well and applying external load to the analysis model;
and the stress analysis module is suitable for obtaining the stress value of the concerned area in the assembly body through finite element analysis.
9. A computing device, comprising: the system comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete mutual communication through the communication bus;
the memory is configured to store at least one executable instruction that causes the processor to perform operations corresponding to the logging instrument housing finite element analysis method of any one of claims 1-7.
10. A computer storage medium having stored therein at least one executable instruction that causes a processor to perform operations corresponding to the logging instrument housing finite element analysis method of any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211152164.7A CN115481453A (en) | 2022-09-21 | 2022-09-21 | Logging instrument shell finite element analysis method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211152164.7A CN115481453A (en) | 2022-09-21 | 2022-09-21 | Logging instrument shell finite element analysis method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115481453A true CN115481453A (en) | 2022-12-16 |
Family
ID=84423631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211152164.7A Pending CN115481453A (en) | 2022-09-21 | 2022-09-21 | Logging instrument shell finite element analysis method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115481453A (en) |
-
2022
- 2022-09-21 CN CN202211152164.7A patent/CN115481453A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Gosz | Finite element method: applications in solids, structures, and heat transfer | |
| US10867083B2 (en) | Technique for generating approximate design solutions | |
| Armero et al. | Three‐dimensional finite elements with embedded strong discontinuities to model material failure in the infinitesimal range | |
| US20170212968A1 (en) | Circuit Verification | |
| Li et al. | Strength predictions of clear wood at multiple scales using numerical limit analysis approaches | |
| IL193808A (en) | Pcb design reliability simulation method and system | |
| JP2011245554A (en) | Sheet metal forming failure prediction using numerical simulation | |
| Lepi | Practical guide to finite elements: a solid mechanics approach | |
| Krafczyk et al. | Learning from reproducing computational results: introducing three principles and the Reproduction Package | |
| CN107545043A (en) | A kind of data application method and device based on data quality checking | |
| CN115481453A (en) | Logging instrument shell finite element analysis method and device | |
| US20160328503A1 (en) | Methods And Systems For Conducting A Time-Marching Numerical Simulation Of A Structure Expected To Experience Metal Necking Failure | |
| CN112270055A (en) | Robot stress analysis method, stress analysis device and processor | |
| Zhang et al. | An Improved GPU-Parallelized 2D/3D Elastoplastic-Damage-Fracture Joint Framework for Combined Finite–Discrete-Element Program | |
| CN116484632A (en) | Auxiliary design method, device, equipment and medium for three-dimensional model | |
| Pinarbasi | Stability analysis of nonuniform rectangular beams using homotopy perturbation method | |
| CN115935559A (en) | Downhole tool bending simulation method and device | |
| CN115310327A (en) | Simulation analysis method and device for multi-working-condition combination | |
| Morrison et al. | Comparison of single-solver FSI techniques for the Fe-prediction of a blow-off pressure for an elastomeric seal | |
| CN115859747A (en) | Calculation method, device and equipment for interference coupling transmission load and storage medium | |
| Huang et al. | Mode shape transformation for model error localization with modal strain energy | |
| CN114240654A (en) | Performance capability perspective method, system, equipment and readable storage medium based on transaction link | |
| Branco et al. | Lynx: A user‐friendly computer application for simulating fatigue growth of planar cracks using FEM | |
| CN113255769A (en) | Compound attribute prediction model training method and compound attribute prediction method | |
| Liu et al. | Finite element model fractional steps updating strategy for spatial lattice structures based on generalized regression neural network |
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 |