CN114913941A - Method and device for establishing simulation parameter database of stress frame casting - Google Patents
Method and device for establishing simulation parameter database of stress frame casting Download PDFInfo
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Abstract
The application discloses a method and a device for establishing a simulation parameter database of a stress frame casting. The method for establishing the simulation parameter database of the stress frame casting comprises the following steps: acquiring manufacturing parameter information and stress conditions of each group of to-be-tested stress frame castings subjected to orthogonal tests; generating a stress simulation model according to the manufacturing parameter information of each group of stress frame castings to be tested; carrying out stress simulation on each stress simulation model, judging whether the stress simulation model and the corresponding stress frame casting to be tested are in a preset stress difference range, and if not, adjusting basic parameter information in the stress simulation model different from the stress of the stress frame casting to be tested; and storing each adjusted stress simulation model to form a simulation parameter database of the stress frame casting. The basic parameter information of each stress simulation model is adjusted by mutually verifying the stress simulation model and a test stress frame casting of an orthogonal test, so that the stress condition of the stress simulation model is close to the actual condition.
Description
Technical Field
The application relates to the technical field of stress frame castings, in particular to a method and a device for establishing a simulation parameter database of a stress frame casting.
Background
The stress of the casting affects the dimensional accuracy and the service life of the casting. Due to the fact that the structure of the casting is complex, stress detection of the casting is difficult, the detection of the stress is always an industry problem, and an effective method and an evaluation standard are lacked.
Casting stresses are always a nuisance to those skilled in casting design and processing. With the gradual maturity of computer simulation technology in the casting field, the "experience + computer CAD/CAE" technology becomes the main way for realizing the casting process nowadays. A relatively accurate simulation can not be separated from thermophysical parameters, and for sand casting, sand and used binders have different thermophysical properties, which can influence the heat dissipation condition of a casting in the solidification process and further influence the thermal stress state of the casting in the solidification process.
With the development of computer science and technology, a related analog simulation method becomes a leading-edge field and a research hotspot of material science and manufacturing science. It has become possible to simulate the formation of stresses during the solidification of a casting using computer simulation techniques. The simulation of the residual stress field in the casting process can analyze the trend of stress distribution and the influence on the service performance of the casting. Based on the analysis of the simulation, the casting and material processes may be adjusted to reduce the residual stress values.
Many factors affect casting stress, such as metal pouring temperature, knockout temperature, and thermophysical parameters of the material. For sand casting, the thermal physical parameters caused by different metal materials, sand and used binder are greatly different, and further the thermal stress state of the casting in the solidification process is influenced.
A relatively accurate simulation of the thermophysical parameters is not possible. And the deviation of the simulated stress value is large by using the default thermophysical parameters in the database. The thermophysical parameters need to be checked according to the actual casting condition and the process condition, so as to obtain a result similar to the actual condition.
Accordingly, a solution is desired to solve or at least mitigate the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The invention aims to provide a simulation parameter database establishment method for a stress frame casting to solve at least one technical problem.
In one aspect of the present invention, a method for establishing a simulation parameter database of a stress frame casting is provided, where the method for establishing a simulation parameter database of a stress frame casting includes:
acquiring manufacturing parameter information of each group of to-be-tested stress frame castings subjected to orthogonal test and stress conditions of each group of to-be-tested stress frame castings;
respectively generating stress simulation models according to the manufacturing parameter information of each group of to-be-tested stress frame castings, wherein one stress simulation model corresponds to one group of to-be-tested stress frame castings;
respectively carrying out stress simulation on each stress simulation model, judging whether the stress simulation model and the stress frame casting to be tested corresponding to the stress simulation model are in a preset stress difference range, and if not, judging whether the stress simulation model and the stress frame casting to be tested are in the preset stress difference range or not
Adjusting basic parameter information in stress simulation models different from the stress of the to-be-tested stress frame castings to enable the stress of each stress simulation model and the stress of the corresponding to-be-tested stress frame castings to reach preset conditions;
and storing the stress simulation models of which the stress of the stress frame castings to be tested reaches the preset condition to form a simulation parameter database of the stress frame castings.
Optionally, the manufacturing parameter information includes at least one or more of sand mold strength, pouring temperature, and shakeout time.
Optionally, the basic parameter information includes: one or more of young's modulus, thermal conductivity, material specific heat, coefficient of thermal expansion, core density, tensile strength, shakeout temperature, and poisson's ratio.
Optionally, the performing an orthogonal test on each group of manufactured stress frame castings to be tested respectively to obtain the stress condition of each group of stress frame castings to be tested includes:
acquiring the elastic modulus of the stress frame casting to be tested;
acquiring strain information of the to-be-tested stress frame casting;
acquiring the length information of a middle rod of the to-be-tested stress frame casting;
and acquiring the stress condition of the to-be-tested stress frame casting according to the elastic modulus of the to-be-tested stress frame casting, the strain information of the to-be-tested stress frame casting and the length information of the middle rod of the to-be-tested stress frame casting.
Optionally, the obtaining of the strain information of the to-be-tested stress frame casting and the obtaining of the length information of the middle rod of the to-be-tested stress frame casting include:
and after the stress frame casting to be tested is subjected to sand shakeout cleaning, marking on the middle thick rod piece, wherein the total length is recorded as L1.
Marking a middle line in the length direction and 50mm marking lines in the upper and lower directions respectively, and measuring the distance between the two lines by using a caliper, wherein the distance is marked as L2;
breaking the casting along the middle line;
remeasure the distance between the two lines, and record as L3;
and calculating casting stress.
Optionally, the adjusting the basic parameter information in the stress simulation model different from the stress of the to-be-tested stress frame casting to make the stress of each stress simulation model the same as the stress of the corresponding to-be-tested stress frame casting includes:
under the condition that the stress detection result of the stress frame scheme is known, fitting is carried out on the stress simulation result of the computer, and basic parameter information is adjusted and iterative simulation calculation is carried out, so that the stress simulation result is the same as or close to the actual stress.
Optionally, each set of stress frame castings to be tested has different manufacturing parameter information and/or different material information.
Optionally, the stress frame casting is a stress frame casting in a vermicular cylinder block.
The application also provides a simulation parameter database establishment device of stress frame foundry goods, the simulation parameter database establishment device of stress frame foundry goods includes:
the acquisition module is used for acquiring manufacturing parameter information of each group of stress frame castings to be tested subjected to orthogonal test and the stress condition of each group of stress frame castings to be tested;
the model generation module is used for generating stress simulation models according to the manufacturing parameter information of each group of stress frame castings to be tested, and one stress simulation model corresponds to one group of stress frame castings to be tested;
the stress simulation module is used for respectively carrying out stress simulation on each stress simulation model;
the judging module is used for respectively carrying out stress simulation on each stress simulation model and judging whether the stress simulation model and the corresponding to-be-tested stress frame casting are within a preset stress difference range;
the adjusting module is used for adjusting basic parameter information in stress simulation models different from the stress of the stress frame castings to be tested when the judging module judges that the stress of each stress simulation model and the stress frame castings to be tested respectively reach a preset condition;
and the storage module is used for storing each stress simulation model which corresponds to the stress frame casting to be tested and enables the stress of the stress frame casting to reach the preset condition so as to form a simulation parameter database of the stress frame casting.
The present application further provides a computer-readable storage medium storing a computer program, which when executed by a processor, can implement the simulation parameter database establishment method for a stress frame casting as described above.
Advantageous effects
The method for establishing the simulation parameter database of the stress frame casting adjusts the basic parameter information of each stress simulation model through mutual verification with the test stress frame casting passing the orthogonal test, so that the simulated situation of each stress simulation model can be similar to the actual situation of the stress result, and the problem that the difference between the model and the actual part is large due to the fact that the database is used for acquiescent thermophysical property parameter modeling in the prior art is solved.
Drawings
Fig. 1 is a schematic flow chart of a simulation parameter database establishment method for a stress frame casting according to an embodiment of the present application.
Fig. 2 is a device schematic diagram of an electronic device for implementing the simulation parameter database creation method for the stress frame casting shown in fig. 1.
Fig. 3 is a schematic structural view of a stress frame casting to be tested according to the present application.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart of a simulation parameter database establishment method for a stress frame casting according to an embodiment of the present application.
The method for establishing the simulation parameter database of the stress frame casting shown in fig. 1 comprises the following steps:
step 1: acquiring manufacturing parameter information of each group of to-be-tested stress frame castings subjected to orthogonal test and stress conditions of each group of to-be-tested stress frame castings;
step 2: respectively generating stress simulation models according to the manufacturing parameter information of each group of to-be-tested stress frame castings, wherein one stress simulation model corresponds to one group of to-be-tested stress frame castings;
and 3, step 3: respectively carrying out stress simulation on each stress simulation model, judging whether the stress simulation model and the stress frame casting to be tested corresponding to the stress simulation model are in a preset stress difference range, and if not, judging whether the stress simulation model and the stress frame casting to be tested are in the preset stress difference range or not
And 4, step 4: adjusting basic parameter information in stress simulation models different from the stress of the to-be-tested stress frame castings to enable the stress of each stress simulation model and the stress of the corresponding to-be-tested stress frame castings to reach preset conditions, wherein in the embodiment, the preset conditions are as follows: the stress of each stress simulation model is the same as or similar to the stress of the corresponding stress frame casting to be tested, for example, the stress of a certain stress simulation model is 3, and the stress of the corresponding stress frame casting to be tested is also 3, at this time, the stress is considered to be the same, that is, the preset condition is reached, for example, the stress of a certain stress simulation model is 3, the stress of the corresponding stress frame casting to be tested is also 2.9, and 2.9 is similar to 3, that is, the preset condition is also considered to be reached, under the similar condition, a similar difference value can be set, for example, the difference value between the two is smaller than a certain value, the two is considered to be similar, for example, the difference value can be within 0.1;
and 5: storing stress simulation models of which the stress of each stress frame casting to be tested reaches a preset condition so as to form a simulation parameter database of the stress frame castings, wherein for example, 5 groups of stress frame castings to be tested, namely stress frame castings A1, B1, C1, D1 and E1, namely five stress simulation models A2, B2, C2, D2 and E2 are stored; stress simulation models A2, B2, C2, D2 and E2 are used for stress simulation, A1, B1, C1, D1 and E1 are used for orthogonal tests to obtain stress conditions, wherein A2 corresponds to A1, B2 corresponds to B1, C2 corresponds to C1, D2 corresponds to D1, and E2 corresponds to E1; assuming that A2, B2, C2, D2 and E2 and corresponding A1, B1, C1, D1 and E1 are all out of a preset stress difference range, adjusting basic parameter information of A2, B2, C2, D2 and E2 until the stress of each stress simulation model and the stress of the stress frame casting to be tested reaches a preset condition, and at the moment, storing the stress simulation models and the stress frame castings to be tested respectively to form a database, wherein the database comprises the basic parameter information of the A2, the B2, the C2, the D2 and the E2.
In one embodiment, each stress simulation model of which the stress of the corresponding to-be-tested stress frame casting reaches the preset condition is stored to form a simulation parameter database of the stress frame casting and a stress simulation model (including basic parameter information of the stress frame casting) of which the stress of the corresponding to-be-tested stress frame casting is within the preset stress difference range.
The method for establishing the simulation parameter database of the stress frame casting adjusts the basic parameter information of each stress simulation model through mutual verification with the test stress frame casting passing the orthogonal test, so that the simulated situation of each stress simulation model can be similar to the actual situation of the stress result, and the problem that the difference between the model and the actual part is large due to the fact that the database is used for acquiescent thermophysical property parameter modeling in the prior art is solved.
For example, for a stress simulation model, which has manufacturing parameter information of a corresponding stress frame casting to be tested, however, in the process of establishing the stress simulation model, although the manufacturing parameter information of the stress frame casting to be tested is used for modeling, the stress situation simulated by the stress simulation model obtained after modeling is different from the actual stress situation obtained by the actual stress frame casting to be tested through an orthogonal test, at this time, the stress simulation model which is the same as the actual stress obtained through the orthogonal test can be obtained by adjusting the basic parameter information, so that convenience is provided for subsequent development, for example, in the process of actually developing the creep iron cylinder block, the developed creep iron cylinder block comprises the stress frame casting, the current development generally establishes the simulation model of each part, if according to the former way, the model of the stress frame casting is simplified by adopting parameters of the system, so that the problem of inter-cylinder cracks of the vermicular iron cylinder body can be caused after the vermicular iron cylinder body of a certain type is manufactured, the problem of inter-cylinder cracks is assumed to be the problem of the stress frame casting, the problem is directly caused, and actually, wrong stress frame casting parameters are used in subsequent development because the simulation model does not actually reflect the actual stress condition of the stress frame casting.
By the method, when the simulation model of the stress frame casting is obtained in the development process of the creep iron cylinder block, the stress condition identical to that of the actual stress frame casting can be obtained by directly obtaining the corresponding stress frame casting from the simulation parameter database, and therefore the problem that the wrong stress frame casting parameters are used in subsequent development due to the fact that the actual stress condition of the stress frame casting is not actually reflected by the simulation model in the development process can be solved.
In this embodiment, the manufacturing parameter information includes at least one or more of sand mold strength, casting temperature, and shakeout time.
The manufacturing parameter information is selected because many factors influencing the casting stress exist, the selection of experimental parameters is very critical, the self-attribute of the casting material determines the structure stress of the casting material, and in the stress field numerical simulation technology in the casting process, the thermophysical property parameters and the high-temperature mechanical property parameters of the casting are visual representations of the self-attribute of the material and have important influence on the accuracy of the temperature field and the stress field numerical simulation result.
The processing of the boundary conditions directly influences the accuracy of casting thermal stress analysis, when finite element software is used for stress analysis, a plurality of constraint conditions are often added, and if the constraint conditions are insufficient, the simulation result is far from the actual situation.
During casting, the primary constraint is the mold (core). The mechanical stress generated by the cooling shrinkage of the casting mold (core) can influence the stress field numerical simulation result, so that the establishment of the casting mold (core) model is a key link of the stress field numerical simulation.
The temperature field is the basis of stress field calculation, and the interface heat exchange coefficient is an important parameter influencing the numerical simulation precision of the temperature field.
The basic relationship of stress strain is:
{dσ}＝[D] ep {{dε}-{dg T }}
in the formula: { d σ } is the stress increment; [ D ]] ep Is an elastic-plastic matrix;
{dε}、{dε T and the total strain increment and the thermal strain increment are respectively.
Based on the reasons, three key parameters of sand mold strength, pouring temperature and shakeout time are selected for orthogonal experimental design.
In this example, the orthogonal test was performed using the following protocol:
the method has the advantages that the factors influencing the casting stress are more, and three key parameters (sand mold strength, pouring temperature and shakeout time) are selected for orthogonal experimental design. Taking a gray cast iron stress simulation as an example, the specific experimental scheme design is shown in tables 1 and 2.
TABLE 1 stress Frames experiment influence factors and levels
TABLE 2 stress frame orthogonal experimental protocol
In this embodiment, the basic parameter information includes: one or more of Young's modulus, thermal conductivity, material specific heat, coefficient of thermal expansion, sand core density, tensile strength, shakeout temperature, and Poisson's ratio.
In this embodiment, the performing an orthogonal test on each group of manufactured stress frame castings to be tested respectively to obtain the stress condition of each group of stress frame castings to be tested includes:
acquiring the elastic modulus of a stress frame casting to be tested;
acquiring strain information of a stress frame casting to be tested;
acquiring length information of a middle rod of a to-be-tested stress frame casting;
and acquiring the stress condition of the to-be-tested stress frame casting according to the elastic modulus of the to-be-tested stress frame casting, the strain information of the to-be-tested stress frame casting and the length information of the middle rod of the to-be-tested stress frame casting.
Referring to fig. 3, in the present embodiment, acquiring strain information of the to-be-tested stress frame casting and acquiring length information of the intermediate rod of the to-be-tested stress frame casting includes:
and after the stress frame casting to be tested is subjected to sand shakeout cleaning, marking on the middle thick rod piece 1, wherein the total length is recorded as L1.
The distance between the middle line in the longitudinal direction and the upper and lower lines each drawn at 50mm was measured with a caliper and was designated as L2 (dimension 100 in the figure);
breaking the casting along the middle line;
remeasure the distance between the aforesaid two lines, record as L3;
and calculating the casting stress of the stress frame casting to be tested.
In this embodiment, since there is an error in scribing, in order to ensure the accuracy of data, after the scribing is completed, an actual value needs to be measured, and therefore, L2 needs to be obtained, and after the casting is cut, the dimension changes due to stress release, and therefore, L3 is obtained.
In the present embodiment, the casting stress is calculated using the following equation:
delta-stress, unit MPa
E-modulus of elasticity; and pouring a test bar simultaneously with the stress frame casting for detection.
ε -strain; L3-L2 ∈ ═ L
L1-Total Length of intermediate rod.
In this embodiment, adjusting the basic parameter information in the stress simulation model different from the stress of the to-be-tested stress frame casting so that the stress of each stress simulation model is the same as the stress of the corresponding to-be-tested stress frame casting includes:
under the condition that the stress detection result of the stress frame scheme is known, fitting is carried out on the stress simulation result of the computer, and adjustment and iterative simulation calculation are carried out on partial thermophysical parameters, so that the simulation result is the same as or close to the actual result.
In this embodiment, the adjustment importance of each piece of basic parameter information is specifically as follows:
| serial number | Stress simulation parameter | Step length adjustment | Influence importance |
| 1 | Young's modulus | 20％ | ★★★★★ |
| 2 | Coefficient of |
10％ | ★★★★ |
| 3 | Specific heat of |
10％ | ★★★★ |
| 4 | Coefficient of |
10％ | ★★★★ |
| 5 | Density of |
10％ | ★★★ |
| 6 | |
10％ | ★★★ |
| 7 | |
50℃ | ★★★ |
| 8 | |
10％ | ★★ |
In the implementation, each group of stress frame castings to be tested have different manufacturing parameter information and/or different material information.
In the implementation, the stress frame casting is a stress frame casting in a vermicular cylinder block.
For example, assuming that the difference between the stress information obtained by the stress simulation model and the stress information obtained by the test is relatively large in the RuT450 stress frame simulation in this embodiment, the simulation parameters are adjusted, so that the simulation stress result reaches 90% of the actual measurement value, and the expected effect is obtained, specifically adjusted as follows:
the application also provides a device for establishing the simulation parameter database of the stress frame casting, which comprises an acquisition module, a model generation module, a stress simulation module, a judgment module, an adjustment module and a storage module, wherein,
the acquisition module is used for acquiring manufacturing parameter information of each group of stress frame castings to be tested subjected to orthogonal test and stress conditions of each group of stress frame castings to be tested;
the model generation module is used for generating stress simulation models according to the manufacturing parameter information of each group of stress frame castings to be tested, and one stress simulation model corresponds to one group of stress frame castings to be tested;
the stress simulation module is used for respectively carrying out stress simulation on each stress simulation model;
the judging module is used for respectively carrying out stress simulation on each stress simulation model and judging whether the stress simulation model and the corresponding to-be-tested stress frame casting are in a preset stress difference range;
the adjusting module is used for adjusting the basic parameter information in the stress simulation model different from the stress of the to-be-tested stress frame casting when the judging module judges that the stress of each stress simulation model and the corresponding to-be-tested stress frame casting reaches the preset condition;
the storage module is used for storing each stress simulation model which corresponds to the stress frame casting to be tested and enables the stress of the stress frame casting to reach the preset condition so as to form a simulation parameter database of the stress frame casting.
The application also provides an electronic device which comprises a memory, a processor and a computer program which is stored in the memory and can run on the processor, wherein the processor executes the computer program to realize the method for establishing the simulation parameter database of the stress frame casting.
The application also provides a computer readable storage medium, which stores a computer program, and the computer program can realize the simulation parameter database establishment method of the stress frame casting when being executed by a processor.
Fig. 2 is an exemplary block diagram of an electronic device capable of implementing a simulation parameter database establishment method for a stress frame casting provided in accordance with an embodiment of the present application.
As shown in fig. 2, the electronic device includes an input device 501, an input interface 502, a central processor 503, a memory 504, an output interface 505, and an output device 506. The input interface 502, the central processing unit 503, the memory 504 and the output interface 505 are connected to each other through a bus 507, and the input device 501 and the output device 506 are connected to the bus 507 through the input interface 502 and the output interface 505, respectively, and further connected to other components of the electronic device. Specifically, the input device 504 receives input information from the outside and transmits the input information to the central processor 503 through the input interface 502; the central processor 503 processes input information based on computer-executable instructions stored in the memory 504 to generate output information, temporarily or permanently stores the output information in the memory 504, and then transmits the output information to the output device 506 through the output interface 505; the output device 506 outputs the output information to the outside of the electronic device for use by the user.
That is, the electronic device shown in fig. 2 may also be implemented to include: a memory storing computer executable instructions; and one or more processors which, when executing the computer executable instructions, may implement the simulation parameter database creation method for a stress frame casting described in connection with fig. 2.
In one embodiment, the electronic device shown in fig. 2 may be implemented to include: a memory 504 configured to store executable program code; one or more processors 503 configured to execute the executable program code stored in the memory 504 to perform the simulation parameter database establishment method for the stress frame casting in the above embodiments.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). Memory is an example of a computer-readable medium.
Computer-readable media include both non-transitory and non-transitory, removable and non-removable media that implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Furthermore, it will be obvious that the term "comprising" does not exclude other elements or steps. A plurality of units, modules or devices recited in the device claims may also be implemented by one unit or overall device by software or hardware.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks identified in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The Processor in this embodiment may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, and so on. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory may be used to store computer programs and/or modules, and the processor may implement various functions of the apparatus/terminal device by running or executing the computer programs and/or modules stored in the memory, as well as by invoking data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
In this embodiment, the module/unit integrated with the apparatus/terminal device may be stored in a computer-readable storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, all or part of the flow in the method according to the embodiments of the present invention may also be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of the embodiments of the method. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like. It should be noted that the computer readable medium may contain content that is appropriately increased or decreased as required by legislation and patent practice in the jurisdiction. Although the present application has been described with reference to the preferred embodiments, it is not intended to limit the present application, and those skilled in the art can make variations and modifications without departing from the spirit and scope of the present application.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Furthermore, it will be obvious that the term "comprising" does not exclude other elements or steps. A plurality of units, modules or devices recited in the device claims may also be implemented by one unit or overall device by software or hardware.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. A method for establishing a simulation parameter database of a stress frame casting is characterized by comprising the following steps of:
acquiring manufacturing parameter information of each group of to-be-tested stress frame castings subjected to orthogonal test and stress conditions of each group of to-be-tested stress frame castings;
respectively generating stress simulation models according to the manufacturing parameter information of each group of to-be-tested stress frame castings, wherein one stress simulation model corresponds to one group of to-be-tested stress frame castings;
respectively carrying out stress simulation on each stress simulation model, judging whether the stress simulation model and the stress frame casting to be tested corresponding to the stress simulation model are in a preset stress difference range, and if not, judging whether the stress simulation model and the stress frame casting to be tested are in the preset stress difference range or not
Adjusting basic parameter information in stress simulation models different from the stress of the to-be-tested stress frame castings to enable the stress of each stress simulation model and the stress of the corresponding to-be-tested stress frame castings to reach preset conditions;
and storing the stress simulation models of which the stress of the stress frame castings to be tested reaches the preset condition to form a simulation parameter database of the stress frame castings.
2. The method for building a database of simulated parameters for a stress frame casting of claim 1, wherein said manufacturing parameter information includes at least one or more of sand mold strength, pour temperature, and shakeout time.
3. The method for building a simulation parameter database of a stress frame casting of claim 2, wherein the basic parameter information comprises: one or more of Young's modulus, thermal conductivity, material specific heat, coefficient of thermal expansion, sand core density, tensile strength, shakeout temperature, and Poisson's ratio.
4. The method for establishing the simulation parameter database of the stress frame casting according to claim 3,
the orthogonal test is respectively carried out on each group of stress frame castings to be tested, so that the stress condition of each group of stress frame castings to be tested comprises the following steps:
acquiring the elastic modulus of the stress frame casting to be tested;
acquiring strain information of the to-be-tested stress frame casting;
acquiring the length information of a middle rod of the to-be-tested stress frame casting;
and acquiring the stress condition of the to-be-tested stress frame casting according to the elastic modulus of the to-be-tested stress frame casting, the strain information of the to-be-tested stress frame casting and the length information of the middle rod of the to-be-tested stress frame casting.
5. The method for establishing the simulation parameter database of the stress frame casting according to claim 4, wherein the obtaining of the strain information of the to-be-tested stress frame casting and the obtaining of the length information of the intermediate rod of the to-be-tested stress frame casting comprise:
after the stress frame casting to be tested is cleaned of falling sand, scribing is carried out on the middle thick rod piece (1), and the total length is recorded as L1;
marking a middle line in the length direction and 50mm marking lines in the upper and lower directions respectively, and measuring the distance between the two lines by using a caliper, wherein the distance is marked as L2;
breaking the casting along the middle line;
remeasure the distance between the two lines, and record as L3;
and calculating the casting stress of the stress frame casting to be tested.
6. The method for establishing a simulation parameter database of a stress frame casting according to claim 5, wherein the adjusting of the basic parameter information in the stress simulation models different from the stress of the stress frame casting to be tested so that the stress of each stress simulation model is the same as the stress of the corresponding stress frame casting to be tested comprises:
under the condition that the stress detection result of the stress frame scheme is known, fitting is carried out on the stress simulation result of the computer, and basic parameter information is adjusted and iterative simulation calculation is carried out, so that the stress simulation result is close to the actual stress value.
7. The method for establishing a simulation parameter database of stress frame castings according to claim 1, wherein each set of stress frame castings to be tested has different manufacturing parameter information and/or different material information.
8. The method for establishing the simulation parameter database of the stress frame casting according to any one of claims 1 to 7, wherein the stress frame casting is a stress frame casting in a creep iron cylinder block.
9. A simulation parameter database establishment device for a stress frame casting is characterized by comprising the following steps:
the acquisition module is used for acquiring manufacturing parameter information of each group of stress frame castings to be tested subjected to orthogonal test and the stress condition of each group of stress frame castings to be tested;
the model generation module is used for generating stress simulation models according to the manufacturing parameter information of each group of stress frame castings to be tested respectively, and one stress simulation model corresponds to one group of stress frame castings to be tested;
the stress simulation module is used for respectively carrying out stress simulation on each stress simulation model;
the judging module is used for respectively carrying out stress simulation on each stress simulation model and judging whether the stress simulation model and the corresponding to-be-tested stress frame casting are within a preset stress difference range;
the adjusting module is used for adjusting basic parameter information in stress simulation models different from the stress of the to-be-tested stress frame castings when the judging module judges that the stress of each stress simulation model and the corresponding to-be-tested stress frame castings reaches a preset condition;
and the storage module is used for storing each stress simulation model which corresponds to the stress frame casting to be tested and enables the stress of the stress frame casting to reach the preset condition so as to form a simulation parameter database of the stress frame casting.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when being executed by a processor, is capable of implementing the method for establishing a database of simulation parameters for a stress frame casting according to any one of claims 1 to 8.
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