Shell shape optimization method and device suitable for falling

Abstract

The invention belongs to the technical field of product design, and discloses a shell shape optimization method and device suitable for falling. The method comprises the following steps: establishing a finite element model of a product shell; determining a loading load according to the characteristics of the product; applying the loading load to the finite element model under a plurality of falling working conditions, and performing multi-working-condition falling simulation; calculating a comprehensive strain value of the to-be-optimized region based on the strain value of each damage point obtained by multi-working-condition drop simulation; and optimizing the morphology of the to-be-optimized region by taking the minimum comprehensive strain value as a target. According to the method provided by the embodiment of the invention, the shell morphology of the product is optimized by comprehensively considering multiple falling working conditions and multiple damage points, and the optimized shell structure can meet the requirements of multiple falling working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of product design, and in particular to a shell shape optimization method and device suitable for falling. Background Art

[0002] Products such as range hoods are prone to falling during transportation and handling. Appearance deformation caused by falling accounts for more than 80%. Designers design the structure of the reinforcement ribs based on experience, and then conduct experiments or CAE verification on the stiffness. If the stiffness does not meet the requirements, the structure of the reinforcement ribs is changed and redesigned, and this process is repeated. The above design method is time-consuming and labor-intensive, and it takes a lot of effort to design a reinforcement rib layout that meets the stiffness requirements. Summary of the invention

[0003] Based on this, a shell morphology optimization method and device suitable for falling are provided to solve at least one of the above technical problems.

[0004] According to a first aspect of the present invention, there is provided a shell morphology optimization method suitable for falling, comprising: Establish the finite element model of the product shell; Determine the loading load according to the characteristics of the product; Applying the loading load to the finite element model under multiple drop conditions to perform a multi-condition drop simulation; Based on the strain values ​​of each damage point obtained from multi-condition drop simulation, the comprehensive strain value of the area to be optimized is calculated; With the goal of minimizing the comprehensive strain value, the morphology of the area to be optimized is optimized.

[0005] In an optional embodiment, the comprehensive strain value of the area to be optimized is calculated by the following formula:

[0006] S is the comprehensive strain value, is the weight of drop condition i, is the strain value of damage point j in drop condition i, is the strain safety value of the area to be optimized, n is the number of drop conditions, and m is the number of damage points.

[0007] In an optional embodiment, the weight of each drop condition is determined by the proportion of the number of drops of the drop condition in the total number of drops.

[0008] In an optional embodiment, optimizing the morphology of the area to be optimized further includes: The rib height is set, and the morphology of the area to be optimized is optimized with the constraint that the rib height of the area to be optimized does not exceed the rib height.

[0009] In an optional embodiment, the loading load is determined according to the characteristics of the product, including: Acquire actual drop parameters, which include the total mass of the product and its packaging, the actual drop height, and the time it takes for the product to fall from contact with the ground to rest; The loading load is calculated according to the actual drop parameters.

[0010] In an optional embodiment, the loading load is calculated by the following formula: ,in

[0011] Where F is the loading load, is the impact force of the packaged product falling to the ground, m is the total mass of the product and its packaging, H is the actual drop height, It is the time from when the product falls to the ground and stops.

[0012] In an optional embodiment, the method further includes: Proofing verification is carried out based on the optimization results. If the optimized shell structure meets the drop requirements, the optimized shell structure is used as the final shell model; if the optimized shell structure does not meet the drop requirements, the finite element model of the product shell is re-established and the optimization is continued.

[0013] According to a second aspect of the present invention, there is provided a shell morphology optimization device suitable for falling, comprising: Modeling module, used to build the finite element model of the product shell; Load module, used to determine the loading load according to the characteristics of the product; A simulation module, used for applying the loading load to the finite element model under multiple drop conditions to perform a multi-condition drop simulation; The optimization module is used to calculate the comprehensive strain value of the area to be optimized based on the strain value of each damage point obtained by multi-condition drop simulation; and optimize the morphology of the area to be optimized with the minimum comprehensive strain value as the goal.

[0014] According to a third aspect of the present invention, there is provided an electronic device, comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, and the processor implements the steps of the method described in any embodiment of the present invention when executing the computer program.

[0015] According to a fourth aspect of the present invention, there is provided a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the method steps as described in any embodiment of the present invention are implemented.

[0016] The present invention provides a shell morphology optimization method suitable for falling, and the technical solution provided by the embodiment of the present invention brings at least the following beneficial effects: The shell morphology optimization method suitable for falling of the embodiment of the present invention includes: establishing a finite element model of the product shell; determining the loading load according to the characteristics of the product; applying the loading load to the finite element model under multiple falling conditions to perform multi-condition falling simulation; calculating the comprehensive strain value of the area to be optimized based on the strain value of each damage point obtained by the multi-condition falling simulation; optimizing the morphology of the area to be optimized with the minimum comprehensive strain value as the goal. The method of the embodiment of the present invention comprehensively considers multiple falling conditions and multiple damage points to optimize the shell morphology of the product. The optimized shell structure can meet the requirements of multiple falling conditions and effectively reduce the appearance deformation caused by falling.

[0017] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A flow chart of a shell morphology optimization method suitable for falling provided in an embodiment of the present invention; Figure 2 A schematic diagram of the structure of an original design scheme of a shell in a specific application of a shell morphology optimization method suitable for falling provided by an embodiment of the present invention; Figure 3 A schematic diagram of a shell network model obtained in a specific application of a shell morphology optimization method suitable for falling provided by an embodiment of the present invention; Figure 4 A schematic diagram of a packaged range hood model obtained by a specific application of a shell morphology optimization method suitable for falling provided by an embodiment of the present invention; Figure 5 A schematic diagram of morphology optimization obtained by a specific application of a shell morphology optimization method suitable for falling provided by an embodiment of the present invention; Figure 6 A schematic diagram of a final optimization solution obtained in a specific application of a shell morphology optimization method suitable for falling provided by an embodiment of the present invention; Figure 7A schematic diagram of the structure of a shell morphology optimization device suitable for falling provided by an embodiment of the present invention; Figure 8 A schematic diagram of the structure of a control part of an electronic device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0021] The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0022] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] See also Figure 1 , an embodiment of the present invention provides a shell morphology optimization method suitable for falling, comprising: Establish the finite element model of the product shell; Determine the loading load according to the characteristics of the product; Apply the loading load to the finite element model under multiple drop conditions to perform multi-condition drop simulation; Based on the strain values ​​of each damage point obtained from multi-condition drop simulation, the comprehensive strain value of the area to be optimized is calculated; With the goal of minimizing the comprehensive strain value, the morphology of the optimized area is optimized.

[0024] In the shell morphology optimization method suitable for falling of the embodiment of the present invention, a finite element model of the product shell is established; the loading load is determined according to the characteristics of the product; the loading load is applied to the finite element model under multiple falling conditions to perform multi-condition falling simulation; based on the strain values ​​of each damage point obtained by the multi-condition falling simulation, the comprehensive strain value of the area to be optimized is calculated; with the minimum comprehensive strain value as the goal, the morphology of the area to be optimized is optimized. The method of the embodiment of the present invention comprehensively considers multiple falling conditions and multiple damage points to optimize the shell morphology of the product. The optimized shell structure can meet the requirements of various falling conditions and effectively reduce the appearance deformation caused by falling.

[0025] In some embodiments, establishing a finite element model of a product shell may specifically include: establishing a structural model of the product; simplifying the structural model, cleaning up the geometry, dividing the mesh, and establishing a finite element model of the shell.

[0026] In the embodiment of the present invention, establishing a structural model may also include establishing a structural model of a product with packaging. Thus, the falling of a product with an outer packaging can be simulated. For example, when a product falls during transportation, the product is packed in an outer packaging, and the product and the outer packaging fall as a whole. The products in the embodiment of the present invention may include various electrical appliances. For example, a range hood, a microwave oven, an oven, etc. Taking a range hood as an example, the method of the embodiment of the present invention can establish a structural model of the range hood.

[0027] When establishing a finite element model, the shell may be simplified, the geometry cleaned, and the meshing may be performed. The product and packaging may also be simplified, the geometry cleaned, and the meshing may be performed. In an embodiment of the present invention, one surface of the shell may be selected as an optimization object, and when establishing a finite element model, at least the meshing needs to be performed on the optimization object. Taking a range hood as an example, the top plate of the shell is easy to deform. Taking the top plate as the optimization object, when establishing a finite element model, the top plate may be simplified, the geometry cleaned, and the meshing may be performed.

[0028] In the embodiments of the present invention, the specific method of establishing the finite element model is not described, such as the specific steps of geometry cleaning, mesh division, etc., which can adopt the existing technology and will not be described in detail here.

[0029] In some embodiments, the loading load is determined according to the characteristics of the product, including: obtaining actual drop parameters, the actual drop parameters include the total mass of the product and the packaging, the actual drop height, and the time it takes for the product to fall from contact with the ground to come to rest; calculating the loading load according to the actual drop parameters. In the embodiment of the present invention, the loading load can be determined according to actual drop parameters such as the total mass of the product and the packaging, the actual drop height, and the time it takes for the product to fall from contact with the ground to come to rest, and the actual drop parameters include relevant parameters when the drop test is actually performed. In view of the possible drop situation that may occur during the transportation of the product, in the corresponding drop test, the product with the package is tested as a whole under various drop conditions, and the actual drop parameters specifically include the total mass of the product and the packaging, the actual drop height, and the time it takes for the product to fall from contact with the ground to come to rest.

[0030] In some embodiments, the loading load is calculated by the following formula: ,in

[0031] Where F is the loading load, is the impact force of the packaged product falling to the ground, m is the total mass of the product and its packaging, H is the actual drop height, It is the time from when the product falls to the ground and stops. The actual load in the drop test is related to the height, weight, etc. The impact force formula of the packaged product falling to the ground is as follows:

[0032] in, It is the impact force after the packaged product falls to the ground, in N; It is the time from when the product falls to when it touches the ground and comes to rest. In the specific implementation, take the range hood drop test as an example. It can be 0.06s; is the total mass of the package and product, in kg; It is the speed difference from maximum speed to static speed, in m / s.

[0033]

[0034] in, is the drop height in meters.

[0035]

[0036] Therefore, the formula for calculating the loading applied to the finite element model is:

[0037] According to the actual height and weight in the drop test, the loading load is calculated by the above formula.

[0038] In the method of the embodiment of the present invention, based on the strain value of each damage point obtained by the multi-condition drop simulation, the comprehensive strain value of the area to be optimized is calculated, and the morphology of the area to be optimized is optimized with the minimum comprehensive strain value as the goal, so as to obtain the optimized morphological characteristics. The multi-condition drop simulation simulates multiple drop conditions respectively, so as to obtain the strain value of each damage point respectively, and the multiple drop conditions can be selected from a total of ten drop conditions of one corner, three edges and six faces. In the specific implementation, the drop condition of six faces can be selected, or seven drop conditions of one corner and six faces can be selected, or nine drop conditions of three edges and six faces can be selected, or all ten drop conditions of one corner, three edges and six faces can be selected. When performing the drop test, the number of drops of each drop condition can be the same or different. Taking the six-sided drop test of the range hood as an example, the drop condition of six faces is selected, and the top plate of the shell is prone to deformation. Therefore, on the basis of one drop on each face, the number of drops of the top plate drop condition is increased by four times. A total of ten drops were performed for the six drop conditions, of which five drops were performed for the top plate drop condition and one drop was performed for the other surface drop conditions.

[0039] In some embodiments, the comprehensive strain value of the area to be optimized is calculated based on the strain value of each damage point obtained based on the multi-condition drop simulation, including: obtaining the weight of each drop condition, the strain value of each damage point in each drop condition, and the strain safety value of the area to be optimized, and calculating the comprehensive strain value of the area to be optimized based on the weight of each drop condition, the strain value of each damage point in each drop condition, and the strain safety value of the area to be optimized.

[0040] In some embodiments, the comprehensive strain value of the area to be optimized is calculated by the following formula:

[0041] S is the comprehensive strain value, is the weight of drop condition i, is the strain value of damage point j in drop condition i, is the strain safety value of the area to be optimized, n is the number of drop conditions, and m is the number of damage points.

[0042] In some embodiments, the weight of each drop condition is determined by the proportion of the number of drops of the drop condition in the total number of drops. The weight of each drop condition can be determined according to the proportion of the number of drops of each drop condition in the total number of drops. Taking the six-sided drop test of the range hood as an example, the drop conditions of six sides are selected, and the top plate of the shell is prone to deformation. Therefore, on the basis of one drop on each side, the number of drops of the top plate drop condition is increased by four additional times. A total of ten drops were performed in the six drop conditions, among which the number of drops of the top plate drop condition was five times, and the number of drops of the other surface drop conditions was once respectively. Therefore, the weight of the top plate drop condition is 0.5, and the weights of the other surface drop conditions are 0.1 respectively.

[0043] In some embodiments, the morphology of the region to be optimized is optimized, and the morphology of the region to be optimized is optimized by setting a rib height, taking the rib height of the region to be optimized not exceeding the rib height as a constraint condition. By setting the rib height, constraining the rib height with the rib height, and taking the minimum comprehensive strain value as a goal, the morphology optimization result of the optimized region can be obtained, and a corresponding geometric model can be established according to the optimization result, and a corresponding product can be manufactured according to the geometric model.

[0044] In some embodiments, the method of the embodiment of the present invention further includes: performing proofing verification according to the optimization result, if the optimized shell structure meets the drop requirement, the optimized shell structure is used as the final shell model; if the optimized shell structure does not meet the drop requirement, the finite element model of the product shell is re-established, and the optimization is continued. After the morphology of the optimized area is optimized by the method of the embodiment of the present invention, the morphology optimization result of the optimized area can be obtained, and a corresponding geometric model can be established according to the optimization result. The corresponding product can be manufactured according to the geometric model, proofing is performed according to the optimization result, and a drop test is performed on the proofed product to verify whether the actual product can meet the drop requirement. If the actual product meets the drop requirement, the optimized shell structure is used as the final shell model to complete the optimization of the product morphology. If the optimized shell structure does not meet the drop requirement, the finite element model of the product shell is re-established, and the optimization is continued until the optimized shell structure meets the drop requirement.

[0045] Taking the range hood as an example, the rib height of the area to be optimized is set as the constraint condition that it does not exceed the rib height, and the minimum comprehensive strain value is set as the goal. The morphology of the area to be optimized is optimized to obtain the first version of the geometric model. The range hood is manufactured according to the first version of the geometric model, and a drop test is carried out. If the actual product meets the drop requirements, the first version of the geometric model is used as the final shell model, and the optimization of the product morphology is ended. If the actual product does not meet the drop requirements, the finite element model is re-established, and the optimization is continued to obtain the second version of the geometric model to manufacture the range hood, and a drop test is carried out. If the actual product meets the drop requirements, the second version of the geometric model is used as the final shell model, and the optimization of the product morphology is ended. If the actual product does not meet the drop requirements, the finite element model is re-established, and the optimization is continued until the optimized shell structure meets the drop requirements.

[0046] Taking the optimization of the shell shape of a range hood as an example, the optimization process and effect of the shell shape optimization method suitable for falling according to an embodiment of the present invention are described below.

[0047] The original design of the top plate of the range hood housing is as follows Figure 2 Through the drop test of the original design, it was found that three areas of the top plate were deformed, forming damage points, such as Figure 2 Shown in the red area.

[0048] First, establish the product structure model, perform conventional model simplification, geometry cleaning, mesh division, and establish the finite element model. The shell mesh model obtained can be found in Figure 3 . Packaged range hood models such as Figure 4 shown.

[0049] The loading load is determined according to the product characteristics, where the total mass of the package and the range hood is m, and the drop height is H. The impact force F on the package when it falls is calculated.

[0050] In this embodiment, the fall of the range hood mainly considers the situation of falling on 6 sides, so the falling conditions of the 6 sides are set, and the weighting coefficients of the 6 falling conditions are selected according to the falling settings of each falling condition. According to the falling requirements, one side of the top plate needs to fall an additional 4 times in succession, and the other sides only need to fall once, so the falling condition of one side of the top plate needs to be set with a larger weight, and its specific weight is 0.5, and the weights of the falling conditions of the other sides are 0.1 respectively.

[0051] In this embodiment, the optimization object is the top plate, so the optimization area is set to be the top plate of the smoking machine housing. According to the process restrictions, the rib height is limited to 5mm. Figure 2 The strain value in the red area is used as a reference. Substitute it into the calculation formula and set the comprehensive strain value to the minimum.

[0052] The loading load is applied to the finite element model under multiple drop conditions, and a multi-condition drop simulation is performed, and the strain value of each damage point under each drop condition is extracted, as shown in Table 1. Condition 1 is the drop condition corresponding to one side of the top plate, and the weight is 0.5; the weights of the remaining conditions 2 to 6 are 0.1. The strain safety value can be determined by empirical values. In this embodiment, the strain safety value is 0.05.

[0053] Table 1

[0054] According to the formula Calculate the comprehensive strain value s, where the number of damage points m is 3 and the number of drop conditions n is 6.

[0055] Strain value at damage point 1: 0.5×0.1×(0.1 / 0.05)+0.1×0.06×(0.06 / 0.05)+0.1×0.08×(0.08 / 0.05)+0.1×0.07×(0.07 / 0.05)+0.1×0.065×(0.065 / 0.05)+0.1×0.055×(0.055 / 0.05) Strain value at damage point 2: 0.5×0.15×(0.15 / 0.05)+0.1×0.08×(0.08 / 0.05)+0.1×0.06×(0.06 / 0.05)+0.1×0.055×(0.055 / 0.05)+ 0.1×0.07×(0.07 / 0.05)+ 0.1×0.075×(0.075 / 0.05) Strain value at damage point 3: 0.5×0.12×(0.12 / 0.05)+0.1×0.09×(0.09 / 0.05)+0.1×0.07×(0.07 / 0.05)+0.1×0.06×(0.06 / 0.05)+ 0.1×0.085×(0.085 / 0.05)+ 0.1×0.066×(0.066 / 0.05) Comprehensive strain value = strain value of damage point 1 + strain value of damage point 2 + strain value of damage point 3 = 0.1443 + 0.2721 + 0.2004 = 0.6168 See also Figure 5 The morphology optimization result obtained by optimization is shown in the figure. It is obvious that the red area needs to be reinforced. According to the manufacturing process, the structure is optimized based on the original design plan, and the following is obtained: Figure 6 The final solution for the top plate is shown.

[0056] See also Figure 7An embodiment of the present invention provides a shell morphology optimization device suitable for falling, including a modeling module, a load module, a simulation module and an optimization module. The modeling module is used to establish a finite element model of the product shell; the load module is used to determine the loading load according to the characteristics of the product; the simulation module is used to apply the loading load to the finite element model under multiple falling conditions to perform multi-condition falling simulation; the optimization module is used to calculate the comprehensive strain value of the area to be optimized based on the strain value of each damage point obtained by the multi-condition falling simulation; with the minimum comprehensive strain value as the goal, the morphology of the area to be optimized is optimized.

[0057] The shell shape optimization device suitable for falling of the embodiment of the present invention can implement the methods of the above embodiments, and the description of the above method embodiments can be used to understand and explain the device of the embodiment of the present invention. For the purpose of brevity and saving space, it will not be repeated here.

[0058] According to an embodiment of the present invention, the present invention also provides an electronic device and a readable storage medium.

[0059] An embodiment of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any one of the above methods when executing the computer program.

[0060] See also Figure 8 , is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention. Figure 8 As shown, the electronic device 600 may include: at least one processor 601 , at least one network interface 604 , a user interface 603 , a memory 605 , and at least one communication bus 602 .

[0061] The communication bus 602 is used to realize the connection and communication between these components.

[0062] The user interface 603 may include a display screen (Display) and a camera (Camera). The optional user interface 603 may also include a standard wired interface and a wireless interface.

[0063] The network interface 604 may optionally include a standard wired interface or a wireless interface (such as a WI-FI interface).

[0064] Among them, the processor 601 may include one or more processing cores. The processor 601 uses various interfaces and lines to connect various parts of the entire electronic device 600, and executes various functions and processes data of the electronic device 600 by running or executing instructions, programs, code sets or instruction sets stored in the memory 605, and calling data stored in the memory 605. Optionally, the processor 601 can be implemented in at least one hardware form of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), and programmable logic array (Programmable Logic Array, PLA). The processor 601 can integrate one or a combination of a central processing unit (Central Processing Unit, CPU), a graphics processing unit (Graphics Processing Unit, GPU) and a modem. Among them, the CPU mainly processes the operating system, user interface and application programs; the GPU is responsible for rendering and drawing the content to be displayed on the display screen; the modem is used to process wireless communications. It can be understood that the above-mentioned modem may not be integrated into the processor 601, and it can be implemented separately through a chip.

[0065] Among them, the memory 605 may include a random access memory (Random Access Memory, RAM) and may also include a read-only memory (Read-Only Memory). Optionally, the memory 605 includes a non-transitory computer-readable storage medium. The memory 605 can be used to store instructions, programs, codes, code sets or instruction sets. The memory 605 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playback function, an image playback function, etc.), instructions for implementing the above-mentioned various method embodiments, etc.; the data storage area may store data involved in the above-mentioned various method embodiments, etc. The memory 605 may also be optionally at least one storage device located away from the aforementioned processor 601. As Figure 8 As shown, the memory 605 as a computer storage medium may include an operating system, a network communication module, a user interface module, and an application program.

[0066] exist Figure 8In the electronic device 600 shown, the user interface 603 is mainly used to provide an input interface for the user and obtain data input by the user; and the processor 601 can be used to call the application stored in the memory 605 and specifically perform the operations of any of the above method embodiments.

[0067] The present invention also provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of the above method when executed by a processor. The computer-readable storage medium may include, but is not limited to, any type of disk, including a floppy disk, an optical disk, a DVD, a CD-ROM, a micro drive, and a magneto-optical disk, a ROM, a RAM, an EPROM, an EEPROM, a DRAM, a VRAM, a flash memory device, a magnetic card or an optical card, a nanosystem (including a molecular memory IC), or any type of medium or device suitable for storing instructions and / or data.

[0068] An embodiment of the present invention also provides a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute part or all of the steps of any method recorded in the above method embodiments.

[0069] Those skilled in the art can clearly understand that the technical solution of the present invention can be implemented with the help of software and / or hardware. "Unit" and "module" in this specification refer to software and / or hardware that can independently complete or cooperate with other components to complete specific functions, where the hardware can be, for example, a field programmable gate array (FPGA), an integrated circuit (IC), etc.

[0070] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0071] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0072] In the several embodiments provided by the present invention, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are only schematic, such as the division of units, which is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0073] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0074] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0075] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable memory. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art or the whole or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a memory and includes several instructions to enable a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned memory includes: U disk, read-only memory (ROM), random access memory (RAM), mobile hard disk, disk or optical disk and other media that can store program codes.

[0076] A person skilled in the art may understand that all or part of the steps in the various methods of the above embodiments may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable memory, which may include: a flash drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc.

[0077] The above is only an exemplary embodiment of the present invention and cannot be used to limit the scope of the present invention. That is, any equivalent changes and modifications made according to the teachings of the present invention are still within the scope of the present invention. After considering the specification and practicing the disclosure here, those skilled in the art will easily think of other embodiments of the present invention. The present invention is intended to cover any variation, use or adaptive change of the present invention, which follows the general principles of the present invention and includes common knowledge or customary technical means in the art that are not recorded in the present invention. The description and examples are only regarded as exemplary, and the scope and spirit of the present invention are defined by the claims.

Claims

1. A shell morphology optimization method suitable for falling, characterized in that: include: Establish the finite element model of the product shell; Determine the loading load according to the characteristics of the product; Applying the loading load to the finite element model under multiple drop conditions to perform a multi-condition drop simulation; Based on the strain values ​​of each damage point obtained from multi-condition drop simulation, the comprehensive strain value of the area to be optimized is calculated; With the goal of minimizing the comprehensive strain value, the morphology of the area to be optimized is optimized.

2. The method according to claim 1, characterized in that: The comprehensive strain value of the area to be optimized is calculated by the following formula: S is the comprehensive strain value, is the weight of drop condition i, is the strain value of damage point j in drop condition i, is the strain safety value of the area to be optimized, n is the number of drop conditions, and m is the number of damage points.

3. The method according to claim 2, characterized in that The weight of each drop condition is determined by the proportion of the drop times of the drop condition in the total drop times.

4. The method according to claim 1, characterized in that Optimizing the morphology of the area to be optimized also includes: The rib height is set, and the morphology of the area to be optimized is optimized with the constraint that the rib height of the area to be optimized does not exceed the rib height.

5. The method according to claim 1, characterized in that Determine the loading load based on the characteristics of the product, including: Acquire actual drop parameters, which include the total mass of the product and its packaging, the actual drop height, and the time it takes for the product to fall from contact with the ground to rest; The loading load is calculated according to the actual drop parameters.

6. The method according to claim 5, characterized in that The loading load is calculated by the following formula: ,in Where F is the loading load, is the impact force of the packaged product falling to the ground, m is the total mass of the product and its packaging, H is the actual drop height, It is the time from when the product falls to the ground and stops.

7. The method according to claim 1, characterized in that Also includes: Proofing verification is carried out based on the optimization results. If the optimized shell structure meets the drop requirements, the optimized shell structure is used as the final shell model; if the optimized shell structure does not meet the drop requirements, the finite element model of the product shell is re-established and the optimization is continued.

8. A shell morphology optimization device suitable for falling, characterized in that: include: Modeling module, used to build the finite element model of the product shell; Load module, used to determine the loading load according to the characteristics of the product; A simulation module, used for applying the loading load to the finite element model under multiple drop conditions to perform a multi-condition drop simulation; The optimization module is used to calculate the comprehensive strain value of the area to be optimized based on the strain value of each damage point obtained from the multi-condition drop simulation; With the goal of minimizing the comprehensive strain value, the morphology of the area to be optimized is optimized.

9. An electronic device, comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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