CN113742984B - Method and device for applying load and constraint in rigging product stress analysis - Google Patents
Method and device for applying load and constraint in rigging product stress analysis Download PDFInfo
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Abstract
The invention provides a method and a device for applying load and restraint in stress analysis of a rigging product, wherein the method comprises the following steps: acquiring a finite element model of a rigging product, a load applying body and a load applied by the load applying body; determining the deformation of the load applying body on the rigging product based on the load applied by the load applying body; and based on the contact between the finite element model of the deformed rigging product and the load applying body, transmitting the load applied by the load applying body to the finite element model of the deformed rigging product and determining the load and the constraint so as to solve according to the load and the constraint to obtain a stress analysis result of the rigging product. The method can realize the application of load and restraint on the rigging product, the process is simple, the applied load and restraint are more scientific and accurate, and the stress analysis result of the subsequent rigging product is more accurate.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a method and a device for applying load and constraint in stress analysis of a rigging product.
Background
At present, in the research and design of a rigging product, finite element analysis is often performed on the stress of a typical rigging product to obtain the stress distribution and the deformation condition of the typical rigging product, and then the obtained stress distribution and the deformation condition are used as the basis for judging and checking the reliability and the safety of the typical rigging product.
The primary purpose of finite element analysis is to examine the response of a typical rigging product structure to certain loading conditions. Therefore, when finite element analysis is performed on the stress of a typical rigging product, loads and constraints need to be applied, and how to scientifically and accurately apply the loads and the constraints to the rigging product becomes a problem to be solved urgently in the stress analysis of the rigging product.
Disclosure of Invention
In view of the above, the present invention provides a method and a device for applying load and constraint in a stress analysis of a rigging product, so as to alleviate the technical problem that the prior art cannot scientifically and accurately apply load and constraint to the rigging product.
In a first aspect, an embodiment of the present invention provides a method for applying a load and a constraint in a stress analysis of a rigging product, where the method includes:
acquiring a finite element model, a load applying body and a load applied by the load applying body, wherein the load applying body is a solid model, the structure of the finite element model comprises nodes and units, the structure of the solid model is a point, a line, a plane and a body, and the load applied by the load applying body is applied to the structure of the solid model;
determining the deformation of the rigging product caused by the load applying body based on the load applied by the load applying body;
and based on the contact between the deformed finite element model of the rigging product and the load applying body, transmitting the load applied by the load applying body to the deformed finite element model of the rigging product and determining the load and the constraint so as to obtain a stress analysis result of the rigging product according to the load and the constraint solution.
Further, determining the deformation of the rigging product caused by the load applying body based on the load applied by the load applying body includes:
determining a topology map of the rigging product, which includes an area in contact with the load applying body, and parameter information of the rigging product;
predicting the deformation of the rigging product generated by the load applying body on the topological graph of the rigging product based on a predetermined deformation prediction model, the load applied by the load applying body, the topological graph of the rigging product, and the parameter information of the rigging product;
and mapping the topological graph of the rigging product after deformation to a finite element model of the rigging product to obtain the finite element model of the rigging product after deformation.
Further, the method also comprises the following steps:
determining a training sample, wherein the training sample comprises a topological graph sample pair of a rigging product, parameter information of the rigging product and a load applied by a load applying body, the training sample is obtained based on experimental data, and the topological graph sample pair comprises a topological graph sample before deformation and a topological graph sample after deformation;
and training the deformation prediction model based on the training samples.
Further, mapping the topology map of the rigging product after the deformation to a finite element model of the rigging product, including:
determining the topological graph of the rigging product and the deformation displacement of the key point in the deformed topological graph of the rigging product;
and mapping the deformation displacement of the key point to the finite element model of the rigging product based on the mapping relation between the topological graph of the rigging product and the finite element model of the rigging product to obtain the deformed finite element model of the rigging product.
Further, the force analysis result includes: deformation maps and stress/strain clouds.
Further, the rigging product includes at least one of: the hook comprises a strong ring, a double-ring buckle, an arch shackle, an eye-shaped safety hook, an European-style cavel slip hook, a rotary hook, a welding hook, a fastening ring, an eye-shaped grapple with a cavel and a cavel wing hook.
Further, the load applying body may be in the form of: a cylindrical form and/or a chain form.
In a second aspect, an embodiment of the present invention further provides a device for applying load and constraint in a force analysis of a rigging product, the device including:
the system comprises an acquisition unit, a load application unit and a control unit, wherein the acquisition unit is used for acquiring a finite element model of a rigging product, a load application body and a load applied by the load application body, the load application body is a solid model, the structure of the finite element model comprises nodes and units, the structure of the solid model is a point, a line, a plane and a body, and the load applied by the load application body is applied to the structure of the solid model;
a determination unit configured to determine, based on the load applied by the load applying body, a deformation of the rigging product by the load applying body;
and the load transmission and solving unit is used for transmitting the load applied by the load applying body to the deformed finite element model of the rigging product and determining the load and the constraint based on the contact between the deformed finite element model of the rigging product and the load applying body, so that the stress analysis result of the rigging product is obtained according to the load and the constraint solving.
In a third aspect, an embodiment of the present invention further provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the method according to any one of the above first aspects when executing the computer program.
In a fourth aspect, embodiments of the present invention also provide a computer-readable storage medium storing machine executable instructions, which when invoked and executed by a processor, cause the processor to perform the method of any of the first aspect.
In an embodiment of the present invention, a method for applying a load and a constraint in a stress analysis of a rigging product is provided, including: acquiring a finite element model, a load applying body and a load applied by the load applying body of the rigging product, wherein the load applying body is a solid model, the structure of the finite element model comprises nodes and units, the structure of the solid model comprises points, lines, surfaces and bodies, and the load applied by the load applying body is applied to the structure of the solid model; determining the deformation of the load applying body on the rigging product based on the load applied by the load applying body; and based on the contact between the finite element model of the deformed rigging product and the load applying body, transmitting the load applied by the load applying body to the finite element model of the deformed rigging product and determining the load and the constraint so as to solve according to the load and the constraint to obtain a stress analysis result of the rigging product. According to the method for applying the load and the constraint in the stress analysis of the rigging product, the load is applied to the structure of the solid model, the deformation of the load applying body on the rigging product is determined based on the load applied by the load applying body, then the load applied by the load applying body is transmitted to the finite element model of the deformed rigging product and the load and the constraint are determined based on the contact between the finite element model of the deformed rigging product and the load applying body, and the stress analysis result of the rigging product is obtained according to the load and the constraint.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a method for applying load and constraint in a force analysis of a rigging product according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for determining the deformation of a load applying body on a rigging product according to an embodiment of the present invention;
fig. 3 is a flowchart for mapping a topology map of a deformed rigging product onto a finite element model of the rigging product to obtain the finite element model of the deformed rigging product according to the embodiment of the present invention;
FIG. 4 is a schematic view of a load and constraint applying apparatus for a force analysis of a rigging product according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. 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 invention.
In the stress analysis of the rigging product in the prior art, loads and constraints are applied to grid units and nodes, and the rigging product is complex and not scientific enough
Based on the method, the load is applied to the structure of the solid model, the deformation of the load applying body on the rigging product is determined based on the load applied by the load applying body, then the load applied by the load applying body is transmitted to the finite element model of the deformed rigging product and the load and constraint are determined based on the contact between the finite element model of the rigging product after deformation and the load applying body, and the stress analysis result of the rigging product is obtained according to the solving of the load and the constraint.
Embodiments of the present invention are further described below with reference to the accompanying drawings.
The first embodiment is as follows:
in accordance with an embodiment of the present invention, there is provided an embodiment of a method of applying loads and constraints in a force analysis of a rigging product, it being noted that the steps illustrated in the flowchart of the figure may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than here.
Fig. 1 is a flow chart of a method of applying load and restraint in a force analysis of a rigging product according to an embodiment of the invention, as shown in fig. 1, the method including the steps of:
step S102, acquiring a finite element model, a load applying body and a load applied by the load applying body, wherein the load applying body is a solid model, the structure of the finite element model comprises nodes and units, the structure of the solid model comprises points, lines, surfaces and bodies, and the load applied by the load applying body is applied to the structure of the solid model;
in the embodiment of the present invention, the load applied by the load applying body is applied to the structure of the solid model independently of the elements of the finite element model, so that the applied load is not affected by the updating of the elements, nodes, and the like of the finite element model.
The load applying body is in contact with a finite element model of the rigging product, and the load applying body is in the form of a cylinder or a chain.
The finite element model of the rigging product can be obtained by modeling the rigging product to obtain a three-dimensional model of the rigging product, and then performing mesh division and node group setting on the three-dimensional model of the rigging product.
Step S104, determining the deformation of the load applying body on the rigging product based on the load applied by the load applying body;
specifically, the deformation of the rigging product can be predicted through a trained deformation prediction model, and the process is described in detail below.
And S106, based on the contact between the deformed finite element model of the rigging product and the load applying body, transmitting the load applied by the load applying body to the deformed finite element model of the rigging product and determining the load and the constraint so as to obtain a stress analysis result of the rigging product according to the load and the constraint solution.
The stress analysis result comprises: deformation maps and stress/strain clouds.
In an embodiment of the present invention, a method for applying a load and a constraint in a stress analysis of a rigging product is provided, including: acquiring a finite element model, a load applying body and a load applied by the load applying body of the rigging product, wherein the load applying body is a solid model, the structure of the finite element model comprises nodes and units, the structure of the solid model comprises points, lines, surfaces and bodies, and the load applied by the load applying body is applied to the structure of the solid model; determining the deformation of the load applying body on the rigging product based on the load applied by the load applying body; and based on the contact between the finite element model of the deformed rigging product and the load applying body, transmitting the load applied by the load applying body to the finite element model of the deformed rigging product and determining the load and the constraint so as to solve according to the load and the constraint to obtain a stress analysis result of the rigging product. According to the method for applying the load and the constraint in the stress analysis of the rigging product, the load is applied to the structure of the solid model, the deformation of the load applying body on the rigging product is determined based on the load applied by the load applying body, then the load applied by the load applying body is transmitted to the finite element model of the deformed rigging product and the load and the constraint are determined based on the contact between the finite element model of the deformed rigging product and the load applying body, and the stress analysis result of the rigging product is obtained according to the load and the constraint.
The above description briefly describes the method of applying the load and restraint in the force analysis of the rigging product according to the invention, and the details thereof are described in detail below.
In an alternative embodiment of the present invention, referring to fig. 2, the deformation of the load applying body on the rigging product is determined based on the load applied by the load applying body, and the method specifically includes the following steps:
step S201, determining a topological graph of the rigging product and parameter information of the rigging product, wherein the topological graph of the rigging product comprises an area contacted with a load applying body;
step S202, predicting deformation of the load applying body on the topological graph of the rigging product based on a predetermined deformation prediction model, the load applied by the load applying body, the topological graph of the rigging product and the parameter information of the rigging product;
specifically, the load applied by the load applying body, the topological graph of the rigging product, and the parameter information of the rigging product may be input into a predetermined deformation prediction model, and the deformation prediction model may predict the deformation of the load applying body on the topological graph of the rigging product.
The deformation of the topological graph of the rigging product is predicted through the deformation prediction model, so that the finally predicted deformation is more accurate, and further, the subsequent load and constraint applied to the rigging product are more accurate.
Step S203, the topological graph of the deformed rigging product is mapped to the finite element model of the rigging product, and the finite element model of the deformed rigging product is obtained.
Referring to fig. 3, the process of step S203 may specifically include:
step S301, determining the topological graph of the rigging product and the deformation displacement of the key point in the topological graph of the deformed rigging product;
step S302, based on the mapping relation between the topological graph of the rigging product and the finite element model of the rigging product, mapping the deformation displacement of the key point to the finite element model of the rigging product to obtain the finite element model of the rigging product after deformation.
In an optional embodiment of the invention, the method further comprises: determining a training sample, wherein the training sample comprises a topological graph sample pair of a rigging product, parameter information of the rigging product and a load applied by a load applying body, the training sample is obtained based on experimental data, and the topological graph sample pair comprises a topological graph sample before deformation and a topological graph sample after deformation; and training the deformation prediction model based on the training samples.
In an alternative embodiment of the invention, the rigging product comprises at least one of: the hook comprises a strong ring, a double-ring buckle, an arch shackle, an eye-shaped safety hook, an European-style cavel slip hook, a rotary hook, a welding hook, a fastening ring, an eye-shaped grapple with a cavel and a cavel wing hook.
After the rigging product is subjected to stress analysis, the stress analysis result is analyzed to obtain: the obtained stress distribution result rules are similar for the ring structures of the strong ring, the double-ring buckle, the bow shackle and the eye-shaped safety hook. It can be seen from the obtained stress cloud chart that the stress on the inner and outer surfaces and the surfaces at the two sides of the upper and lower parts of the ring structure is larger. Because the load is vertically downward, the section of the bearing part is stressed by the resultant force of bending and shearing forces, the inner sides of the upper part and the lower part are stressed in compression, and the outer sides are stressed in tension; at the two sides of the ring, the inner side is under tension and the outer side is under compression and the deformation is large, therefore, the parts are dangerous sections of the ring. Wherein, the double-ring buckle and the bow shackle are loaded.
For common hook structures such as European style cavel sliding hooks, rotating hooks, welding hooks and fastening rings, the stress cloud picture shows that the inner surface and the outer surface of the arc position on one side of the hook body have larger stress, especially the inner side area, so the inner side area is thickened. In addition, the strength of the eye-shaped safety hook and the European-style cavel sliding hook is ensured by the pin shaft; the contact position of the rotating hook body and the upper ring structure has larger stress, and a gasket is applied to prevent the rotating hook body from being damaged due to overlarge stress. The fastening ring mainly has larger stress at the middle part, and is contacted with the ball and is subjected to inward pressure stress; the arc portion above in contact with the ring is highly stressed and should have an increased radius.
The lower pin shaft and the right half part of the hook body, particularly the two side surfaces of the hook body are the parts with the large stress of the claw eye type grapple. The strength of the pin shaft can be generally ensured, and the thickness of the right half part of the hook body needs to be increased. After the hook is loaded, the ring on one side can be clamped on the surface of the hook body, so that the stress on the contact surface is larger, and the strength of the hook body on the side is increased.
After the results are obtained, the structural design of the rigging product is optimized, and the multi-objective optimization of the mechanical property, the material consumption and the manufacturing cost of the rigging is realized.
Example two:
the embodiment of the invention also provides a device for applying the load and the constraint in the stress analysis of the rigging product, wherein the device for applying the load and the constraint in the stress analysis of the rigging product is mainly used for executing the method for applying the load and the constraint in the stress analysis of the rigging product provided by the first embodiment of the invention.
Fig. 4 is a schematic diagram of a load and constraint applying device in a force analysis of a rigging product according to an embodiment of the invention, as shown in fig. 4, the device mainly includes: an acquisition unit 10, a determination unit 20 and a load transfer and solution unit 30, wherein:
the system comprises an acquisition unit, a load applying unit and a control unit, wherein the acquisition unit is used for acquiring a finite element model, a load applying body and a load applied by the load applying body, the load applying body is a solid model, the structure of the finite element model comprises nodes and units, the structure of the solid model comprises points, lines, surfaces and bodies, and the load applied by the load applying body is applied to the structure of the solid model;
a determination unit for determining the deformation of the load applying body on the rigging product based on the load applied by the load applying body;
and the load transmission and solving unit is used for transmitting the load applied by the load applying body to the finite element model of the deformed rigging product and determining the load and the constraint based on the contact between the finite element model of the deformed rigging product and the load applying body, so that the stress analysis result of the rigging product is obtained according to the load and the constraint solving.
In an embodiment of the present invention, there is provided a load and constraint applying apparatus in a force analysis of a rigging product, including: acquiring a finite element model, a load applying body and a load applied by the load applying body of the rigging product, wherein the load applying body is a solid model, the structure of the finite element model comprises nodes and units, the structure of the solid model comprises points, lines, surfaces and bodies, and the load applied by the load applying body is applied to the structure of the solid model; determining the deformation of the load applying body on the rigging product based on the load applied by the load applying body; and based on the contact between the finite element model of the deformed rigging product and the load applying body, transmitting the load applied by the load applying body to the finite element model of the deformed rigging product and determining the load and the constraint so as to solve according to the load and the constraint to obtain a stress analysis result of the rigging product. According to the description, the load and constraint applying device in the stress analysis of the rigging product applies the load to the structure of the solid model, determines the deformation of the load applying body on the rigging product based on the load applied by the load applying body, transmits the load applied by the load applying body to the finite element model of the deformed rigging product and determines the load and constraint based on the contact between the finite element model of the deformed rigging product and the load applying body, and then solves the stress analysis result of the rigging product according to the load and constraint.
Optionally, the determining unit is further configured to: determining a topological graph of the rigging product and parameter information of the rigging product, wherein the topological graph of the rigging product comprises an area in contact with the load applying body; predicting the deformation of the load applying body on the topological graph of the rigging product based on a predetermined deformation prediction model, the load applied by the load applying body, the topological graph of the rigging product and the parameter information of the rigging product; and mapping the topological graph of the deformed rigging product to a finite element model of the rigging product to obtain the finite element model of the deformed rigging product.
Optionally, the apparatus is further configured to: determining a training sample, wherein the training sample comprises a topological graph sample pair of a rigging product, parameter information of the rigging product and a load applied by a load applying body, the training sample is obtained based on experimental data, and the topological graph sample pair comprises a topological graph sample before deformation and a topological graph sample after deformation; and training the deformation prediction model based on the training samples.
Optionally, the determining unit is further configured to: determining the topological graph of the rigging product and the deformation displacement of the key point in the deformed topological graph of the rigging product; and mapping the deformation displacement of the key point to the finite element model of the rigging product based on the mapping relation between the topological graph of the rigging product and the finite element model of the rigging product to obtain the deformed finite element model of the rigging product.
Optionally, the force analysis result includes: deformation maps and stress/strain clouds.
Optionally, the rigging product comprises at least one of: the hook comprises a strong ring, a double-ring buckle, an arch shackle, an eye-shaped safety hook, an European-style cavel slip hook, a rotary hook, a welding hook, a fastening ring, an eye-shaped grapple with a cavel and a cavel wing hook.
Optionally, the form of the load applying body comprises: a cylindrical form and/or a chain form.
The device provided by the embodiment of the present invention has the same implementation principle and technical effect as the method embodiments, and for the sake of brief description, reference may be made to the corresponding contents in the method embodiments without reference to the device embodiments.
As shown in fig. 5, an electronic device 600 provided in an embodiment of the present application includes: a processor 601, a memory 602 and a bus, wherein the memory 602 stores machine-readable instructions executable by the processor 601, when the electronic device runs, the processor 601 and the memory 602 communicate with each other through the bus, and the processor 601 executes the machine-readable instructions to execute the steps of the method for applying the load and the constraint in the stress analysis of the rigging product.
Specifically, the memory 602 and the processor 601 can be general-purpose memories and processors, which are not limited to specific ones, and when the processor 601 runs a computer program stored in the memory 602, the method for applying the load and the constraint in the stress analysis of the rigging product can be performed.
The processor 601 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 601. The Processor 601 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 602, and the processor 601 reads the information in the memory 602 and completes the steps of the method in combination with the hardware thereof.
Corresponding to the method for applying the load and the constraint in the stress analysis of the rigging product, the embodiment of the application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores machine executable instructions, and when the computer executable instructions are called and executed by a processor, the computer executable instructions cause the processor to execute the steps of the method for applying the load and the constraint in the stress analysis of the rigging product.
The load and constraint applying device in the stress analysis of the rigging product provided by the embodiment of the application can be specific hardware on the equipment or software or firmware installed on the equipment, and the like. The device provided by the embodiment of the present application has the same implementation principle and technical effect as the foregoing method embodiments, and for the sake of brief description, reference may be made to the corresponding contents in the foregoing method embodiments where no part of the device embodiments is mentioned. It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the foregoing systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
For another example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of apparatus, 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 shown 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 units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments provided in the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing an electronic device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the vehicle marking method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus once an item is defined in one figure, it need not be further defined and explained in subsequent figures, and moreover, the terms "first", "second", "third", etc. are used merely to distinguish one description from another and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present application, and are used for illustrating the technical solutions of the present application, but not limiting the same, and the scope of the present application is not limited thereto, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope disclosed in the present application; such modifications, changes or substitutions do not depart from the scope of the embodiments of the present application. Are intended to be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. A method of applying load and restraint in a force analysis of a rigging product, the method comprising:
acquiring a finite element model, a load applying body and a load applied by the load applying body, wherein the load applying body is a solid model, the structure of the finite element model comprises nodes and units, the structure of the solid model is a point, a line, a plane and a body, and the load applied by the load applying body is applied to the structure of the solid model;
determining the deformation of the rigging product caused by the load applying body based on the load applied by the load applying body;
based on the contact between the deformed finite element model of the rigging product and the load applying body, transmitting the load applied by the load applying body to the deformed finite element model of the rigging product and determining the load and the constraint so as to obtain a stress analysis result of the rigging product according to the load and the constraint solution;
wherein determining the deformation of the load applying body on the rigging product based on the load applied by the load applying body comprises:
determining a topology map of the rigging product, which includes an area in contact with the load applying body, and parameter information of the rigging product;
predicting the deformation of the rigging product generated by the load applying body on the topological graph of the rigging product based on a predetermined deformation prediction model, the load applied by the load applying body, the topological graph of the rigging product, and the parameter information of the rigging product;
mapping the topological graph of the rigging product after deformation to a finite element model of the rigging product to obtain the finite element model of the rigging product after deformation;
mapping the topological graph of the rigging product after deformation to a finite element model of the rigging product, wherein the mapping comprises:
determining the topological graph of the rigging product and the deformation displacement of the key point in the deformed topological graph of the rigging product;
and mapping the deformation displacement of the key point to the finite element model of the rigging product based on the mapping relation between the topological graph of the rigging product and the finite element model of the rigging product to obtain the deformed finite element model of the rigging product.
2. The method of claim 1, further comprising:
determining a training sample, wherein the training sample comprises a topological graph sample pair of a rigging product, parameter information of the rigging product and a load applied by a load applying body, the training sample is obtained based on experimental data, and the topological graph sample pair comprises a topological graph sample before deformation and a topological graph sample after deformation;
and training the deformation prediction model based on the training samples.
3. The method of claim 1, wherein the force analysis results comprise: deformation maps and stress/strain clouds.
4. The method of claim 1, wherein the rigging product comprises at least one of: the hook comprises a strong ring, a double-ring buckle, an arch shackle, an eye-shaped safety hook, an European-style cavel slip hook, a rotary hook, a welding hook, a fastening ring, an eye-shaped grapple with a cavel and a cavel wing hook.
5. The method of claim 1, wherein the form of the load applying body comprises: a cylindrical form and/or a chain form.
6. A load and restraint applying apparatus in a force analysis of a rigging product, the apparatus comprising:
the system comprises an acquisition unit, a load application unit and a control unit, wherein the acquisition unit is used for acquiring a finite element model of a rigging product, a load application body and a load applied by the load application body, the load application body is a solid model, the structure of the finite element model comprises nodes and units, the structure of the solid model is a point, a line, a plane and a body, and the load applied by the load application body is applied to the structure of the solid model;
a determination unit configured to determine, based on the load applied by the load applying body, a deformation of the rigging product by the load applying body;
the load transmission and solving unit is used for transmitting the load applied by the load applying body to the deformed finite element model of the rigging product and determining the load and constraint based on the contact between the deformed finite element model of the rigging product and the load applying body so as to obtain a stress analysis result of the rigging product according to the load and constraint solving;
wherein the determining unit is further configured to: determining a topology map of the rigging product, which includes an area in contact with the load applying body, and parameter information of the rigging product;
predicting the deformation of the rigging product generated by the load applying body on the topological graph of the rigging product based on a predetermined deformation prediction model, the load applied by the load applying body, the topological graph of the rigging product, and the parameter information of the rigging product;
mapping the topological graph of the rigging product after deformation to a finite element model of the rigging product to obtain the finite element model of the rigging product after deformation;
wherein the determining unit is further configured to: determining the topological graph of the rigging product and the deformation displacement of the key point in the deformed topological graph of the rigging product;
and mapping the deformation displacement of the key point to the finite element model of the rigging product based on the mapping relation between the topological graph of the rigging product and the finite element model of the rigging product to obtain the deformed finite element model of the rigging product.
7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the steps of the method of any of the preceding claims 1 to 5 are implemented when the computer program is executed by the processor.
8. A computer readable storage medium having stored thereon machine executable instructions which, when invoked and executed by a processor, cause the processor to perform the method of any of claims 1 to 5.
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Denomination of invention: Load and constraint application methods and devices in force analysis of rigging products Effective date of registration: 20230821 Granted publication date: 20220125 Pledgee: The Bank of Jining Limited by Share Ltd. Guang River Road Branch Pledgor: SHANDONG SHENLI RIGGING Co.,Ltd. Registration number: Y2023980053027 |
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