Docking block design optimization method and device based on lattice structure mechanical model

Abstract

The invention discloses a docking block design optimization method and device based on a lattice structure mechanical model. The docking block design optimization method comprises the steps that an expression of the relative density Dp of a lattice structure plate is established; fitting the equivalent thickness heq of the lattice structure plate by adopting an index equation, obtaining an expression of a lattice structure mechanical model by combining the equivalent thickness heq based on a rigidity calculation formula of material mechanics, and calibrating index parameters by adopting a finite element simulation method to obtain an optimized lattice structure mechanical model; and carrying out optimization design on the docking block structure by adopting the lattice structure mechanical model. According to the method, the relationship between the rigidity and the relative density of the lattice structure plate is quantified through an equivalent thickness method, then the concept of the equivalent thickness of the lattice structure plate is put forward, the equivalent thickness formula of the lattice structure plate is established, and the rigidity formula for calculating the lattice structure plate is established, so that a lattice structure mechanical model is more accurate; and the docking block design can be better optimized.

Description

Technical Field

[0001] The invention relates to the technical field of digital modeling and optimization design, and in particular to a dock pier design optimization method and device based on a lattice structure mechanics model. Background Art

[0002] With the development of shipbuilding and marine engineering technology, the dock folding device is placed in the dock as an important facility for the manufacture, maintenance and overhaul of ships and other marine engineering equipment. During the operation of the dock folding device, the dock pier needs to bear the weight of the ship, and the dock pier itself needs to be rotated and folded in the horizontal and vertical directions, which has certain requirements for its lightweight and rigidity.

[0003] The main methods of lightweighting industrial products in the existing technology include the application of new lightweight materials, the use of advanced processing technology and structural optimization. In recent years, topology optimization has played a huge role in product lightweighting. The emergence of additive manufacturing technology has further promoted the application of lightweight structures, making many new structures that cannot be achieved by traditional processing possible. Using additive manufacturing as a product processing method, the weight of the product can be reduced by locally using a lattice filling structure in the design. Since the lattice filling structure is composed of complex unit stacking, there are gaps inside it, which allows it to have a variety of novel thermal and mechanical properties at the macro level.

[0004] In the design and manufacture of industrial products such as docks, plates and pipes are often used. However, in the lattice design process, a shell with a single surface thickness is usually designed first and simulated and analyzed, and then a lattice filling structure is added to the shell. The stiffness of such a structure is between that of a hollow shell structure and a solid structure. Although there have been many studies on the design methods of lattice structures and their macroscopic elastic parameters, and the characteristics of lattice structures have been understood, the influence of the relative density of lattice materials on steel has not been quantified, and the cost of stiffness loss cannot be quantified, and the structure is difficult to apply. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the present invention provides a dock pier design optimization method and device based on a lattice structure mechanics model, which uses the equivalent thickness method to quantify the relationship between the stiffness and relative density of the lattice structure plate, and then proposes the concept of equivalent thickness of the lattice structure plate, establishes the equivalent thickness formula of the lattice structure plate, and establishes a formula for calculating the stiffness of the lattice structure plate, so that the lattice structure mechanics model is more accurate and the dock pier design can be better optimized.

[0006] To achieve the above purpose, the present invention adopts the following technical solution.

[0007] In some embodiments, a dock pier design optimization method based on a lattice structural mechanics model is provided, wherein at least some steps of the dock pier design optimization method are performed using a computer program, including the following steps:

[0008] Establish the relative density D of the lattice structure plate p The relative density D p The expression is:

[0009]

[0010] in, is the diameter of the lattice rod, l c is the length of the lattice unit, and the lattice structure is a BCC structure lattice;

[0011] The equivalent thickness h of the lattice structure plate is calculated using the exponential equation eq The equivalent thickness h is fitted. eq is the relative density D p Related functions; the equivalent thickness h eq By using a solid plate with the same stiffness as the equivalent, the equivalent thickness h is obtained by fitting eq for:

[0012] h eq =(h1-h0)D p a +h0

[0013] Among them, h1 is the thickness of the lattice structure plate, h0 is the wall thickness of the lattice structure plate, and a is the exponential parameter;

[0014] Based on the stiffness calculation formula of material mechanics, combined with the equivalent thickness h eq , obtain the expression of the lattice structure mechanical model, the expression of the lattice structure mechanical model is the stiffness formula of the lattice structure plate including the exponential parameter a; the stiffness formula of the lattice structure plate is:

[0015]

[0016] Among them, k lattice is the stiffness of the lattice structure plate, E is the Young's modulus of the material, and l is the length of the lattice structure plate;

[0017] The exponential parameter a is calibrated by using a finite element simulation method to obtain an optimized lattice structure mechanical model;

[0018] The lattice structure mechanics model is used to optimize the design of the dock pier structure.

[0019] In some embodiments, the stiffness calculation formula of the material mechanics is a calculation formula for the stiffness k of a two-dimensional cantilever beam:

[0020]

[0021] Where E is the Young's modulus of the material, l x is the length of the material, h y is the thickness of the material.

[0022] In some embodiments, the relative density D p Satisfy the following rules:

[0023]

[0024] That is, when the relative density of the lattice structure plate is equal to 0, the equivalent thickness is h0; when the relative density of the lattice structure plate is equal to 1, the equivalent thickness is h1.

[0025] In some embodiments, the optimization design of the dock structure using the lattice structure mechanics model includes:

[0026] According to the deformation threshold and the displacement of the solid structure, the longitudinal cross-sectional area of ​​the lattice structure plate is determined. The longitudinal cross-sectional area calculation formula is:

[0027]

[0028] Where h1 = l c m+h0, m is the number of layers of lattice units; U lim is the deformation threshold, U f is the displacement of the solid structure.

[0029] In some embodiments, the minimum diameter of the lattice rod is the minimum size that can be processed by the metal SLM method while ensuring accuracy.

[0030] In some embodiments, the optimization design of the dock structure using the lattice structure mechanics model includes:

[0031] Determining the relative density according to a deformation threshold and a displacement of the solid structure;

[0032] Determining the diameter of the lattice rods of the lattice structure that meets the displacement requirement according to the relative density;

[0033] The dock structure is optimally designed according to the diameter of the lattice rods of the lattice structure that meets the displacement requirement.

[0034] In some embodiments, determining the relative density according to the deformation threshold and the displacement of the solid structure includes:

[0035] The relative density D is determined using the following formula: p :

[0036]

[0037] Among them, U lim is the deformation threshold, U f is the displacement of the solid structure.

[0038] In some embodiments, a dock pier design optimization device based on a lattice structure mechanics model is also provided, and the dock pier design optimization device includes the following modules:

[0039] Relative density calculation module, used to establish the relative density D of the lattice structure plate p The relative density D p The expression is:

[0040]

[0041] in, is the diameter of the lattice rod, l c is the length of the lattice unit, and the lattice structure is a BCC structure lattice;

[0042] The equivalent thickness fitting module is used to use the exponential equation to calculate the equivalent thickness h of the lattice structure plate. eq The equivalent thickness h is fitted. eq is the relative density D p Related functions; the equivalent thickness h eq By using a solid plate with the same stiffness as the equivalent, the equivalent thickness h is obtained by fitting eq for:

[0043] h eq =(h1-h0)D p a +h0

[0044] Among them, h1 is the thickness of the lattice structure plate, h0 is the wall thickness of the lattice structure plate, and a is the exponential parameter;

[0045] Stiffness calculation module, used for stiffness calculation formula based on material mechanics, combined with the equivalent thickness h eq , obtain the expression of the lattice structure mechanical model, the expression of the lattice structure mechanical model is the stiffness formula of the lattice structure plate including the exponential parameter a; the stiffness formula of the lattice structure plate is:

[0046]

[0047] Among them, k lattice is the stiffness of the lattice structure plate, E is the Young's modulus of the material, and l is the length of the lattice structure plate;

[0048] A lattice structure mechanical model optimization module is used to calibrate the exponential parameter a by using a finite element simulation method to obtain an optimized lattice structure mechanical model;

[0049] The dock pier structure optimization design module is used to optimize the dock pier structure by using the lattice structure mechanics model.

[0050] In some embodiments, an electronic device is also provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any of the above-described methods when executing the program.

[0051] In some embodiments, a computer-readable storage medium is further provided, characterized in that the storage medium stores a computer program, and when the computer program is executed by a processor, any of the methods described above is implemented.

[0052] Compared with the prior art, the beneficial effects of the present invention are:

[0053] According to the dock pier design optimization method and device based on the lattice structure mechanical model of each embodiment of the present invention, the equivalent thickness method is used to quantify the relationship between the stiffness and relative density of the lattice structure plate, and a lattice filling structure is used inside the plate. Through experiments and finite element analysis, the influence of the relative density of the lattice structure plate on the stiffness is studied, and then the concept of equivalent thickness of the lattice structure plate is proposed. An equivalent thickness formula for the lattice structure plate is established, and a stiffness formula for calculating the lattice structure plate is established. Then, a finite element simulation method is used to calibrate the exponential parameters in the stiffness formula to obtain an optimized lattice structure mechanical model. The lattice structure mechanical model is used to optimize the design of the dock pier structure. The lattice structure mechanical model according to the present application can make the design results consistent with the test and finite element analysis results, more in line with actual requirements, thereby improving the accuracy and efficiency of the design. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 The present invention is a flowchart of a method for optimizing dock pier design based on a lattice structural mechanics model according to an embodiment of the present invention.

[0055] Figure 2 Schematic diagram of a lattice structure plate according to an embodiment of the present invention.

[0056] Figure 3 Schematic diagram of a local lattice unit of a lattice structure plate according to an embodiment of the present invention.

[0057] Figure 4 FIG. 1 is a schematic diagram of a BCC structure of a lattice unit according to an embodiment of the present invention.

[0058] Figure 5The figure is a schematic diagram of a dock folding device according to an embodiment of the present invention.

[0059] Figure 6 It is a module schematic diagram of a dock pier design optimization device based on a lattice structural mechanics model according to an embodiment of the present invention.

[0060] Figure 7 A schematic diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0063] Figure 1 The present invention is a flowchart of a dock pier design optimization method based on a lattice structural mechanics model according to an embodiment of the present invention. At least some steps of the dock pier design optimization method are executed by a computer program, including the following steps:

[0064] S1: Establish the relative density D of the lattice structure plate p The relative density D p The expression is:

[0065]

[0066] in, is the diameter of the lattice rod, l c is the length of the lattice unit, and the lattice structure is a BCC (Body-Centered Cubic) lattice.

[0067] refer to Figure 2Specifically, the lattice structure plate is filled with a lattice structure and has a lattice filling structure. In some embodiments, the lattice structure is composed of a plurality of lattice units. The plurality of lattice units together form a lattice filling structure. Each lattice unit includes a lattice rod. In some embodiments, the lattice unit is a prism structure (refer to Figure 3 In some embodiments, the lattice filling structure is placed in a regular BCC type structure lattice. It is a vertex (body-centered) structure, and each lattice unit is composed of a cube center connected to 8 vertex pillars (refer to Figure 4 ).

[0068] S2: Use exponential equation to calculate the equivalent thickness h of the lattice structure plate eq The equivalent thickness h is fitted. eq is the relative density D p Related functions; the equivalent thickness h eq By using a solid plate with the same stiffness as the equivalent, the equivalent thickness h is obtained by fitting eq for:

[0069] h eq =(h1-h0)D p a +h0

[0070] Among them, h1 is the thickness of the lattice structure plate, h0 is the wall thickness of the lattice structure plate, and a is the exponential parameter.

[0071] S3: Stiffness calculation formula based on material mechanics, combined with the equivalent thickness h eq , obtain the expression of the lattice structure mechanical model, the expression of the lattice structure mechanical model is the stiffness formula of the lattice structure plate including the exponential parameter a; the stiffness formula of the lattice structure plate is:

[0072]

[0073] Among them, k lattice is the stiffness of the lattice structure plate, E is the Young's modulus of the material, and l is the length of the lattice structure plate.

[0074] S4: Using a finite element simulation method, the exponential parameter a is calibrated to obtain an optimized lattice structure mechanical model; the optimized lattice structure mechanical model includes a stiffness formula of the lattice structure plate after the exponential parameter a is calibrated. In some embodiments, the finite element simulation method (FEM) may be some methods known in the prior art, which can take into account all microstructure features, but usually requires a large amount of computing resources because a large amount of computing time is consumed. Through the finite element simulation method, a standard value of the stiffness of the lattice structure plate can be obtained, and the standard value is used as the stiffness k of the lattice structure plate. lattice, by substituting it into the stiffness formula of the lattice structure plate, the value of the exponential parameter a can be fitted, thereby calibrating the exponential parameter a.

[0075] S5: Using the lattice structure mechanical model, optimize the dock pier structure. Specifically, the size of the lattice structure can be designed according to the stiffness requirements. For example, according to the stiffness k of the given lattice structure plate lattice , and on the basis of determining other dimensions of the lattice structure plate, calculate the diameter of the lattice rod according to the stiffness formula Therefore, the diameter of the lattice rod can be calculated based on To process and manufacture the dock structure to meet the design requirements.

[0076] Figure 5 The schematic diagram of a dock folding device of an embodiment of the present invention. The dock folding device includes a folding mechanism, a mobile hydraulic oil station, a watertight junction box, etc. The folding mechanism is mainly a mechanical device for realizing the erection and collapse of the dock; the mobile hydraulic oil station is used to provide the folding power, the electrical operation and manual control of the device; the watertight junction box is used to collect the state signal of the outboard watertight travel switch of the folding mechanism, and transmit it to the mobile hydraulic oil station for status display and control. The folding mechanism includes a folding frame, a folding cylinder, a ballast, a pulley block, an outboard watertight travel switch, etc. In some embodiments, the dock folding structure can be a folding cylinder, a pulley block and other structural parts. The dock has a dock structure, which can be used to carry the main body of the ship under maintenance. Since the dock needs to be erected and collapsed, and needs to bear heavy loads. There are high design requirements for its lightweight and rigidity. According to the lattice structural mechanics model of the present application, the design results can be consistent with the test and finite element analysis results, and more in line with actual requirements, thereby improving the accuracy and efficiency of the design. Through the optimization design method of the embodiment of the present application, efficient optimization design of the dock pier structure can be achieved.

[0077] In the design, only relying on the stiffness of the solid plate to determine the upper and lower limits of the stiffness of the lattice structure plate can only qualitatively analyze and guide the stiffness of the lattice filling structure to be between the two, which is not enough to apply the lattice structure in the design stage. Only when the size of the stiffness of a certain lattice filling structure can be quantitatively calculated can the size be determined in the design stage. The advantage of the lattice structure plate is not weight reduction under equal strength conditions, but weight reduction under the same design space conditions, that is, in the same part space, the lattice filling structure can evenly fill the entire space. The stiffness deviation between the solid plate and the lattice structure plate is small, and the stiffness of the solid plate can be directly given by the formula, but the lattice structure plate requires complex formula derivation. It is often the case that the lattice structure has excellent complex performance, and the formula derivation process for directly calculating the macroscopic stiffness of the structure is extremely cumbersome. Finite element analysis is used to simulate the mechanical properties of the lattice structure, but the size of the lattice structure is too small relative to the overall parts, which leads to unit density, and thus it is difficult to perform finite element calculations, and the calculation efficiency is low. Through the optimization design method of the embodiment of the present application, efficient optimization design of the dock pier structure can be achieved.

[0078] In some embodiments, the stiffness calculation formula of the material mechanics is a calculation formula for the stiffness k of a two-dimensional cantilever beam:

[0079]

[0080] Where E is the Young's modulus of the material, l x is the length of the material, h y is the thickness of the material.

[0081] In some embodiments, the relative density D p Satisfy the following rules:

[0082]

[0083] That is, when the relative density of the lattice structure plate is equal to 0, the equivalent thickness is h0; when the relative density of the lattice structure plate is equal to 1, the equivalent thickness is h1.

[0084] In some embodiments, the optimization design of the dock structure using the lattice structure mechanics model includes:

[0085] According to the deformation threshold and the displacement of the solid structure, the longitudinal cross-sectional area of ​​the lattice structure plate is determined. The longitudinal cross-sectional area calculation formula is:

[0086]

[0087] Where h1 = l c m+h0, m is the number of layers of lattice units; U lim is the deformation threshold, U f is the displacement of the solid structure.

[0088] Specifically, the displacement of the solid structure U f =4Fl 3 / (Ebh1 3 ), where F is the load force and b is the width of the lattice structure plate. Its value can be directly calculated. If a lattice filling structure is used, the deformation expression corresponding to the lattice structure plate is:

[0089]

[0090] The relative density D can be derived p The calculation formula is,

[0091]

[0092] refer to Figure 2 , we can get the longitudinal section area of ​​the lattice structure plate:

[0093] S=l((h1-h0)D p +h0)

[0094] The size of the lattice unit can be further determined through the longitudinal cross-sectional area, so that the dock structure can be optimally designed.

[0095] In some embodiments, the minimum diameter of the lattice rod is the minimum size that can be processed by metal SLM (Selective laser melting, which is a main technical approach in additive manufacturing of metal materials) while ensuring accuracy.

[0096] In some embodiments, the optimization design of the dock structure using the lattice structure mechanics model includes:

[0097] Determining the relative density according to a deformation threshold and a displacement of the solid structure;

[0098] Determining the diameter of the lattice rods of the lattice structure that meets the displacement requirement according to the relative density;

[0099] The dock structure is optimally designed according to the diameter of the lattice rods of the lattice structure that meets the displacement requirement.

[0100] In some embodiments, determining the relative density according to the deformation threshold and the displacement of the solid structure includes:

[0101] The relative density D is determined using the following formula: p :

[0102]

[0103] Among them, u lim is the deformation threshold, U f is the displacement of the solid structure.

[0104] It is understood that the relative density D can be determined after the other dimensions of the lattice structure (except the diameter of the lattice rods) are determined. p , and then the relative density can be calculated in reverse To determine the diameter of the lattice rod.

[0105] In some embodiments, the minimum diameter of the lattice rod is the minimum size that can be processed by the metal SLM method while ensuring accuracy.

[0106] Figure 6 The module diagram of the dock pier design optimization device based on the lattice structural mechanics model according to one embodiment of the present invention is shown in FIG. Figure 6 In some embodiments of the present application, a dock pier design optimization device based on a lattice structure mechanics model is also provided, and the dock pier design optimization device includes the following modules:

[0107] Relative density calculation module, used to establish the relative density D of the lattice structure plate p The relative density D p The expression is:

[0108]

[0109] in, is the diameter of the lattice rod, l c is the length of the lattice unit, and the lattice structure is a BCC structure lattice;

[0110] The equivalent thickness fitting module is used to use the exponential equation to calculate the equivalent thickness h of the lattice structure plate. eq The equivalent thickness h is fitted. eq is the relative density D p Related functions; the equivalent thickness h eq By using a solid plate with the same stiffness as the equivalent, the equivalent thickness h is obtained by fitting eq for:

[0111] h eq =(h1-h0)D p a +h0

[0112] Among them, h1 is the thickness of the lattice structure plate, h0 is the wall thickness of the lattice structure plate, and a is the exponential parameter;

[0113] Stiffness calculation module, used for stiffness calculation formula based on material mechanics, combined with the equivalent thickness h eq, obtain the expression of the lattice structure mechanical model, the expression of the lattice structure mechanical model is the stiffness formula of the lattice structure plate including the exponential parameter a; the stiffness formula of the lattice structure plate is:

[0114]

[0115] Among them, k lattice is the stiffness of the lattice structure plate, E is the Young's modulus of the material, and l is the length of the lattice structure plate;

[0116] A lattice structure mechanical model optimization module is used to calibrate the exponential parameter a by using a finite element simulation method to obtain an optimized lattice structure mechanical model;

[0117] The dock pier structure optimization design module is used to optimize the dock pier structure by using the lattice structure mechanics model.

[0118] In some embodiments, the above-mentioned dock pier design optimization device based on the lattice structure mechanics model corresponds to the above-mentioned dock pier design optimization method based on the lattice structure mechanics model, and each module has the function of implementing the above-mentioned dock pier design optimization method based on the lattice structure mechanics model.

[0119] Figure 7 FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the present invention. Figure 7 In some embodiments, an electronic device is also provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements any of the above-described methods when executing the program.

[0120] At the hardware level, the electronic device includes a processor, an internal bus, a network interface, a memory, and a non-volatile memory, and may also include other hardware required for the business. The processor reads the corresponding computer program from the non-volatile memory into the memory and then runs it to achieve the above Figure 1 The dock pier design optimization method based on the lattice structural mechanics model. Of course, in addition to the software implementation, this specification does not exclude other implementation methods, such as logic devices or a combination of software and hardware, etc., that is to say, the execution subject of the following processing flow is not limited to each logic unit, but can also be hardware or logic devices. It can be understood that it is only necessary to program the method flow slightly in a hardware description language and program it into an integrated circuit to obtain a hardware circuit that implements the logical method flow.

[0121] The above method can be implemented by a controller in any appropriate manner. For example, the controller can take the form of a microprocessor or processor and a computer-readable medium storing a computer-readable program code (such as software or firmware) that can be executed by the (micro)processor, a logic gate, a switch, an application-specific integrated circuit (ASIC), a programmable logic controller, and an embedded microcontroller. Examples of controllers include but are not limited to microcontrollers. The memory controller can also be implemented as part of the control logic of the memory. It is understandable that in addition to implementing the controller in a purely computer-readable program code manner, the controller can be implemented in the form of a logic gate, a switch, an application-specific integrated circuit, a programmable logic controller, and an embedded microcontroller by logically programming the method steps. Therefore, this controller can be considered as a hardware component, and the devices included therein for implementing various functions can also be regarded as structures within the hardware component. Or even, the devices for implementing various functions can be regarded as both software modules for implementing the method and structures within the hardware component.

[0122] The systems, devices, modules or units in the above embodiments may be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0123] For the convenience of description, the above device is described by dividing it into various modules according to its functions. Of course, when implementing this specification, the functions of each module can be implemented in the same or multiple software and / or hardware.

[0124] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, this specification may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0125] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present specification. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0126] In some embodiments, a computer-readable storage medium is further provided, wherein the storage medium stores a computer program, and when the computer program is executed by a processor, the dock pier design optimization method based on the lattice structural mechanics model described in any one of the above items is implemented.

[0127] In some embodiments, these computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0128] In some embodiments, these computer program instructions may also be loaded onto a computer or other programmable data processing device so that a series of operation steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0129] In some embodiments, the computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0130] In some embodiments, the memory may include non-permanent storage in a computer-readable medium, in the form of random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0131] In some embodiments, computer-readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, modules of programs 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, read-only compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0132] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dock pier design optimization method based on a lattice structural mechanics model, characterized in that: At least some steps of the dock design optimization method are performed using a computer program, including the following steps: Establish the relative density D of the lattice structure plate p The relative density D p The expression is: in, is the diameter of the lattice rod, l c is the length of the lattice unit, and the lattice structure is a BCC structure lattice; The equivalent thickness h of the lattice structure plate is calculated using the exponential equation eq The equivalent thickness h is fitted. eq is the relative density D p Related functions; the equivalent thickness h eq By using a solid plate with the same stiffness as the equivalent, the equivalent thickness h is obtained by fitting eq for: h eq =(h1-h0)D p a +h0 Among them, h1 is the thickness of the lattice structure plate, h0 is the wall thickness of the lattice structure plate, and a is the exponential parameter; Based on the stiffness calculation formula of material mechanics, combined with the equivalent thickness h eq , obtain the expression of the lattice structure mechanical model, the expression of the lattice structure mechanical model is the stiffness formula of the lattice structure plate including the exponential parameter a; the stiffness formula of the lattice structure plate is: Among them, k lattice is the stiffness of the lattice structure plate, E is the Young's modulus of the material, and l is the length of the lattice structure plate; The exponential parameter a is calibrated by using a finite element simulation method to obtain an optimized lattice structure mechanical model; The lattice structure mechanics model is used to optimize the design of the dock pier structure.

2. The dock pier design optimization method based on the lattice structural mechanics model according to claim 1 is characterized in that: The stiffness calculation formula of the material mechanics is the calculation formula of the stiffness k of the two-dimensional cantilever beam: Where E is the Young's modulus of the material, l x is the length of the material, h y is the thickness of the material.

3. The dock pier design optimization method based on the lattice structural mechanics model according to claim 2 is characterized in that: The relative density D p Satisfy the following rules: That is, when the relative density of the lattice structure plate is equal to 0, the equivalent thickness is h0; when the relative density of the lattice structure plate is equal to 1, the equivalent thickness is h1.

4. The dock pier design optimization method based on the lattice structural mechanics model according to claim 1 is characterized in that: The method of optimizing the dock structure by using the lattice structure mechanical model includes: According to the deformation threshold and the displacement of the solid structure, the longitudinal cross-sectional area of ​​the lattice structure plate is determined. The longitudinal cross-sectional area calculation formula is: Where h1 = l c m+h0, m is the number of layers of lattice units; U lim is the deformation threshold, U f is the displacement of the solid structure.

5. The dock pier design optimization method based on the lattice structural mechanics model according to claim 4 is characterized in that: The minimum diameter of the lattice rod is the minimum size that can be processed by the metal SLM method while ensuring accuracy.

6. The dock pier design optimization method based on the lattice structural mechanics model according to claim 1 is characterized in that: The method of optimizing the dock structure by using the lattice structure mechanical model includes: Determining the relative density according to a deformation threshold and a displacement of the solid structure; Determining the diameter of the lattice rods of the lattice structure that meets the displacement requirement according to the relative density; The dock structure is optimally designed according to the diameter of the lattice rods of the lattice structure that meets the displacement requirement.

7. The dock pier design optimization method based on the lattice structural mechanics model according to claim 6 is characterized in that: The determining the relative density according to the deformation threshold and the displacement of the solid structure includes: The relative density D is determined using the following formula: p : Among them, U lim is the deformation threshold, U f is the displacement of the solid structure.

8. A dock pier design optimization device based on a lattice structural mechanics model, characterized in that: The dock design optimization device includes the following modules: Relative density calculation module, used to establish the relative density D of the lattice structure plate p The relative density D p The expression is: in, is the diameter of the lattice rod, l c is the length of the lattice unit, and the lattice structure is a BCC structure lattice; The equivalent thickness fitting module is used to fit the equivalent thickness h of the lattice structure plate using an exponential equation. eq The equivalent thickness h is fitted. eq is the relative density D p Related functions; the equivalent thickness h eq By using a solid plate with the same stiffness as the equivalent, the equivalent thickness h is obtained by fitting eq for: h eq =(h1-h0)D p a +h0 Among them, h1 is the thickness of the lattice structure plate, h0 is the wall thickness of the lattice structure plate, and a is the exponential parameter; Stiffness calculation module, used for stiffness calculation formula based on material mechanics, combined with the equivalent thickness h eq , obtain the expression of the lattice structure mechanical model, the expression of the lattice structure mechanical model is the stiffness formula of the lattice structure plate including the exponential parameter a; the stiffness formula of the lattice structure plate is: Among them, k lattice is the stiffness of the lattice structure plate, E is the Young's modulus of the material, and l is the length of the lattice structure plate; A lattice structure mechanical model optimization module is used to calibrate the exponential parameter a by using a finite element simulation method to obtain an optimized lattice structure mechanical model; The dock pier structure optimization design module is used to optimize the dock pier structure by using the lattice structure mechanics model.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the method described in any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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