A method for assembly relationship representation and deformation transfer

Abstract

The invention discloses an assembly relationship representation and deformation transfer method, comprising a variable with two elements, a synchronization operator, a parallel operator, a sequence operator, an assembly relationship expression, an operation rule, and a deformation transfer method; the variable with two elements represents a part contact surface or a product functional surface of a certain size, which is located on a part or a physical field, wherein one element is a time period during which the surface exists due to being identified, and the other element is a physical quantity displacement of the surface; a plurality of variables are connected into an assembly relationship expression through synchronization, parallel and sequence operators; the assembly relationship expression expresses a general assembly relationship in a reading order from left to right; the deformation transfer method is a numerical method for integrating continuous physical field deformation calculation of parts according to the number of variables and operator types in the assembly relationship expression, so as to obtain the shape of the equipment in each assembly process and the shape of the equipment after assembly; the invention generally has strong versatility, good industrial standardization and high degree of digitization.

Description

Technical Field

[0001] The present invention belongs to the field of digital assembly and multi-physical field response of intelligent equipment. From the perspective of part contact and matching, it takes "parts or surfaces on physical fields" as the object for the first time to describe the synchronous, parallel and sequential assembly characterization and deformation transfer methods of general parts (and other physical fields). Background Art

[0002] During assembly, with the increase of parts and the change of installation constraints, the equipment shows the phenomenon of dynamic deformation; after the finished product, its dynamic and static characteristics and flow field characteristics will also be different from the design indicators. When defective products appear, the main treatment method in the industry is to modify the local structural form of the functional components of the model product. This treatment method restricts the production cycle and service performance of the equipment. For example, the part matching clearance and connection stiffness will change the natural frequency of the functional components of the equipment and may cause resonance between components. The deformation of the turbine assembly causes a large difference in isentropic efficiency. These problems often require the repair or modification of local components, which will not only cause delays but also easily lead to scrapping. The reason is that the transmission value of part geometry and matching errors (assembly clearance) changes with the assembly progress and installation constraints.

[0003] Parts form surface-to-surface contact due to mutual forces; mechanical connections have clearance fits, interference fits, etc., which will cause different degrees of part assembly gaps at the macro, fine, and micro levels. From a mathematical point of view, displacement is a gap with a direction. On the adjacent contact surfaces between parts, non-continuous displacement accumulation is performed according to certain rules; inside the parts, graphics and mechanical methods can represent the transmission of continuous physical field deformation; in the assembly process, the assembly relationships such as the order of installation of parts, mutual support relationships, and dynamic matching relationships constitute the transmission path of displacement.

[0004] (1) The assembly relationship of parts is often expressed using product trees, adjacency diagrams, etc. The dimension chain formed by this is an important tool for product tolerance analysis. However, when using the dimension chain for tolerance analysis, it is also necessary to combine the geometric relationships of various product features for calculation, but it does not focus on the specific matching of the contact surfaces between parts.

[0005] (2) Positioning principles and tolerance theory have developed part matching specifications and geometric tolerance standards. Among them, the development of multi-station error transfer models has improved the efficiency of precision control of large-scale products. However, tolerance theory is often based on the probability distribution of product shape, position, posture or size from the perspective of large samples, while hiding the specific matching parameters of parts.

[0006] In summary, the existing methods and industry standards are not sufficient to accurately guide the repair of single small batch products, nor are they sufficient to bring out the potential of each individual in large batches of products. The development of computing technology provides an opportunity to break the technical bottleneck of precise control of individual assembly deformation of products. The inventors conducted a study on the deformation transmission and accumulation of assembly gaps of impeller and frame parts in serial and parallel assembly in the literature Algorithm for accumulating part mating gaps to evaluate solid and fluid performances (Journal of mechanical design, doi: 10.1115 / 1.4047910) and the literature A dynamic dimensional accumulation with propagations of part mating gaps for series-parallel assembly operations (Journal of mechanical engineering science, doi: 10.1177 / 0954406220941893), but have not yet solved the logical representation of the synchronous, sequential, and parallel assembly relationships of general assemblies and the problem of deformation transmission, nor have they realized the performance evaluation of general equipment during the assembly process and after the finished product. Summary of the invention

[0007] The objects of the present invention are:

[0008] Provides an assembly relationship characterization and deformation transfer method that can integrate the technical process of the current national standard for structural analysis, and is used for characterization and calculation evaluation of the deviation of the actual performance of the equipment from the design performance caused by the actual assembly clearance formed by the parts in each equipment due to reasons such as clearance fit and interference fit.

[0009] The technical solution for achieving the purpose of the present invention is:

[0010] An assembly relationship representation and deformation transfer method includes a variable with two elements, a synchronization operator, a parallel operator, a sequence operator, an assembly relationship expression, an operation rule, and a deformation transfer method. The variable with two elements represents a surface of a certain size, located on a part or a physical field; the variable with two elements is connected to each other through synchronization, parallel and sequence operators to form an assembly relationship expression; the assembly relationship expression expresses a general assembly relationship in a reading order from left to right; the deformation transfer method is a numerical method that integrates the continuous physical field deformation calculation of each part according to the number of variables and operator types in the assembly relationship expression.

[0011] Compared with the prior art, the present invention has the following significant advantages.

[0012] (1) Strong general versatility. The present invention focuses on the part mating surface formed by general installation operations such as synchronous assembly, parallel assembly, and sequential assembly. This surface is represented by a variable with two elements, including the time when the assembly operation is completed and the current assembly quality. The assembly quality is a series of node displacements on each surface, and the distribution of the nodes can express indicators such as coaxiality, flatness, and roundness.

[0013] (2) Good industrial standardization. The present invention not only provides a qualitative expression in a general sense, but also proposes a quantitative calculation method applicable to the current national standard for structural analysis, so it can serve the actual assembly quality of each piece of equipment in industrial production. The series of node displacements used to represent the assembly quality in the variables of the present invention can be indicators such as force and temperature. After numerical processing, flow field indicators such as flow rate, pressure coefficient, and isentropic efficiency can be obtained.

[0014] (3) High degree of digitization. The present invention can quickly locate the specific structural shape and corresponding physical quantity indicators of the product at each assembly stage by searching each mating surface in the expression, and is a digital model of the deformation transmission and accumulation of individual products during the assembly process.

[0015] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an example diagram of synchronous assembly.

[0017] Figure 2 This is an example diagram of sequential assembly.

[0018] Figure 3 This is an example diagram of parallel assembly.

[0019] Figure 4 The figure is a flow chart of a deformation transfer method of the present invention. Specific embodiments

[0020] The invention discloses an assembly relationship representation method, which includes six contents: a variable with two elements, a synchronization operator, a parallel operator, a sequence operator, an assembly relationship expression, and an operation rule.

[0021] (1) Define a variable with two elements to represent a surface of a certain size, where one element represents the time period during which the surface exists due to being identified, and the other element represents the physical displacement of the surface. The variable is used to represent the key functional surface of the product (such as the assembly reference surface, flatness, and other surfaces that realize key functions) and the mating surface between any two parts in the product, and records the time period and physical displacement of the surface when it is identified.

[0022] (2) Define the synchronization operator to represent the synchronous docking formation of multiple part mating surfaces.

[0023] (3) Define the parallel operator to represent the parallel installation of multiple part mating surfaces.

[0024] (4) Define a sequence operator to represent the sequential installation of multiple part mating surfaces.

[0025] (5) The variables and operators with two elements can list the general product parts assembly relationship. The physical displacement of each variable in the parts assembly relationship is the generalized displacement value of this surface, that is, the actual matching clearance of each pair of parts or the quality of the key functional surface (precision, structural index, flow field index, etc.).

[0026] (6) Define the operators and variables in the assembly relation from left to right, and obtain the time period and physical quantity displacement of each surface due to being identified.

[0027] The advantages of the component assembly relation are: the character operation of the component assembly relation is convenient for computer storage and reading. In particular, a series of variables record a series of component assembly completion times and physical displacements, and completely preserve the structural shape of the equipment in a series of assembly processes.

[0028] One deformation transfer method is:

[0029] The finite element method is used for continuous transfer inside each part; the gap accumulation on each mating surface is performed by numerical interpolation; the necessary translation, rotation and deformation of the coordinates of the part mesh node are performed according to the gap accumulation; the first element of the variable with two elements adopts the displacement vector of the mesh node of the part mating surface.

[0030] According to the assembly relationship of parts, the finite element method, variable grid, interpolation method, etc. are integrated, and its pre-processing includes 8 steps.

[0031] (1) List the product assembly relationship and the physical quantity displacement formula of the key functional surfaces of the product.

[0032] (2) Generate an independent mesh for each part (physical field) and create a node group for each part.

[0033] (3) Select nodes on the later-assembled part in each contact pair, and at the same time, select adjacent nodes on the earlier-assembled part to store assembly clearance and deformation transfer values.

[0034] (4) Select nodes from the key functional surfaces in the physical field as key points to store assembly clearances, physical quantity displacements, etc.

[0035] (5) For each of the above groups of nodes, create a node group and define a physical quantity displacement vector to record the three-axis displacement, air pressure, temperature and other physical quantities of each point.

[0036] (6) The finite element calculation function is used to calculate the node force and displacement for the part mesh, and its input is the assembly clearance and displacement transfer value on the relevant mating surface.

[0037] (7) Use the variable grid function to add the part node displacement to the part grid coordinates.

[0038] (8) Use interpolation functions (including various types of linear interpolation, quadratic interpolation, etc.) to transfer the displacement of the surface of the first assembled part to the adjacent surface of the later assembled part, and then accumulate it into the assembly gap of the surface of the later assembled part.

[0039] The following calculation steps integrate the above-mentioned finite element calculation function, variable grid function, interpolation function, etc. according to the assembly relationship.

[0040] (1) Read the variables and operators in the assembly relation from left to right.

[0041] (2) If it is a synchronous operator, the finite element calculation function is called twice for the parts corresponding to the adjacent variables on both sides of the synchronous operator, and one transfer and one springback calculation are performed respectively to obtain the shape of the current part group and modify the grid node coordinates of the corresponding parts.

[0042] (3) If it is a parallel operator, the physical displacement elements (assembly clearance) of the variables on both sides of the parallel operator are used as the input boundary conditions for the subsequent finite element calculation of the parts.

[0043] (4) If it is a sequence operator, for the parts corresponding to the variables on both sides of the sequence operator, the finite element calculation function is called once, a transfer calculation is performed to obtain the shape of the current part, and the grid node coordinates of the corresponding part are modified.

[0044] (5) If there are more than one variables on the left side of the sequence operator connected by the parallel operator, this means that multiple parts are connected in parallel to the parts corresponding to the variables on the right side of the sequence operator. The part is in an over-constrained state. In this case, it is necessary to call a finite element calculation function, perform a springback calculation, obtain the shape of the current part group, and modify the node coordinates of the corresponding parts.

[0045] (6) If the current variable does not correspond to the key functional surface of the product, return to step (1) and access the next variable and operator.

[0046] (7) Subtract the final key point coordinates from the initial key point coordinates, and the difference is the key point deformation.

[0047] (8) If the next variable on the right side of the operator corresponds to a flow field or a functional surface of a physical field, the variable mesh function and corresponding mechanical calculations are performed (for example, fluid mechanics for a flow field), and the displacement of the corresponding physical field is obtained.

[0048] (9) Numerical methods such as experimental design, random sampling, genetic algorithms, etc. are used to sample and iterate the above process to obtain the response or optimization of the key product indicators to the assembly gap perturbation.

[0049] (10) Retrieve any variable name in the assembly relationship formula to obtain the physical quantity displacement at the assembly moment corresponding to this variable, and obtain the shape of the equipment at the corresponding assembly process or the shape of the equipment after assembly.

[0050] Embodiment

[0051] A method for characterizing assembly relationships and transmitting deformations according to the present invention includes seven items: variables with two elements, synchronous operators, parallel operators, sequence operators, assembly relationship formulas, operation rules, and deformation transmission methods.

[0052] The variable contains two elements. One element is used to record the moment d when the two surfaces of the part just fit and the subsequent time period, and the other element is the three-dimensional displacement δ;带下标的字符(例如大写字母和数字等)表示这一变量,其中,字符是后装配零件编号,下标是先装配零件编号;三维位移δ是分布于后装配零件表面上的位移,广义位移可以是多种物理场位移,例如力、温度的变化。

[0053] Count the number of points on the surface of the later-assembled part as n, then the displacement is a 3-by-n vector, denoted as δ 3×n . For the time period {t|t < d}, since the assembly has not been carried out yet, δ 3×n and this variable are both empty. To distinguish the formation moment d and the physical quantity displacement δ of different surfaces, the number of this surface is used as the subscript of the moment d and the displacement δ.

[0054] For example, in a pair of contact surfaces of parts A and B, the variable B corresponding to the surface on part B A satisfies Equation 1.

[0055]

[0056] Among them, Use the surface number B A as the subscript, which are respectively the physical quantity displacement and the formation moment of surface B A .

[0057] For synchronous operations: At Figure 1In the figure, parts 1, 2, and 3 have six surfaces in contact, among which surface 1-1 contacts surface 3-2, surface 3-1 contacts surface 2-2, and surface 2-1 contacts surface 1-2. The assembly can only be completed when parts 1, 2, and 3 move synchronously and centripetally. These three pairs of contact gaps cause deformation and springback of the components.

[0058] Formula 2 is the synchronous installation of parts A and B with two pairs of mating surfaces. is a synchronization operator. Assembly gap And its transfer and accumulation function through parts A and B The sum represents the assembly quality.

[0059]

[0060] For sequence operations: Figure 2 In the figure, parts 4, 5, and 6 have four contact surfaces, among which surface 4-1 contacts surface 5-1, and surface 5-2 contacts surface 6-1. These two contact pairs have a sequence. Number parts 4, 5, and 6 respectively as C, B, and A, and denote surface 4-1 and surface 5-1 as C B and B C , let face 5-2 and face 6-1 be B A and A B , where C B and B A It is the surface formed after the contact pair they are in.

[0061] Formula 3 describes: First, part B is installed on A to form a mating surface B A , then part C is installed on B to form the mating surface C B . "." is a sequence operator. and They are the coordination moments of A and B, and the coordination moments of C and D, and the function f is a variable From B A Transferred to C via part B B .

[0062]

[0063] For parallel computing: Figure 3 In the figure, parts 8 and 10 form one sequence through the contact between surface 8-2 and surface 10-1, and parts 9 and 11 form another sequence through the contact between surface 9-2 and surface 11-1. Parts 8, 10, 9, and 11 are numbered B, A, D, and C respectively.

[0064] Formula 4 describes: Part B is installed on A to form a mating surface B A , part D is installed on C to form mating surface D C. "*" is a parallel operator. Cumulative and Represents the quality of assembly, and They are the coordination moments of A and B, and the coordination moments of C and D, and the time period t starts from the latest moment.

[0065]

[0066] Operators and variables are read from left to right. The above variables and operators with two elements can list the general product component assembly relationship, as shown in Formula 5, where the variables can be Formula 2 or 3.

[0067]

[0068] Among them, the variable Assembly represents a series of faces, and the variable X1 A1 It is the surface on part X1 among the pair of contact surfaces between parts X1 and A1. The meanings of other contact surface variables are consistent with this. Ke is the functional surface variable of the equipment.

[0069] Retrieve each variable name in the assembly relation (for example, Ym Bm ), and obtain the physical displacement at the assembly time corresponding to this variable

[0070] The above embodiment is a manifestation of the present invention through symbolic operations. Similar surface variable definitions and assembly relational expressions or graphs are also within the protection scope of the present invention.

[0071] According to the component assembly relation 5, the finite element method, variable grid method, interpolation method, etc. are integrated, and the pre-processing is as follows.

[0072] ① Number the parts, number the main surfaces, and list their assembly relationships, as shown in Formula 5.

[0073] ②According to equations 2, 3, and 4, the physical displacement of the key functional surface is obtained: Ke expression.

[0074] ③ Generate an independent mesh for each continuous physical field (for example, a part, the flow field around the part, etc.), and create a node group for each of them, named after its number.

[0075] ④ Select nodes on the later-assembled part in each contact pair, corresponding to the surface name in Formula 5; at the same time, select adjacent nodes on the earlier-assembled part.

[0076] ⑤ Select nodes on the key surface, corresponding to the key functional surface Ke in formula 5.

[0077] ⑥ For each of the above groups of nodes, create a node group, name it with the surface number, and define a vector to record the three-axis displacement or other physical quantities of each point.

[0078] ⑦ Define the finite element calculation function f, which is used to calculate the node force and displacement for the part mesh Its input is the assembly clearance and displacement transfer value

[0079]

[0080] ⑧ Define a variable grid function, as shown in Formula 7, which is used to add the part node displacement to the part coordinates, where i is the node number.

[0081] x′ i =x i +Δx i (7)

[0082] ⑨ Define the interpolation function Interpolation, which is used to transform the surface B of the first assembled part C The displacement is transferred to surface C B , and then accumulated to the surface C of the assembled part B Assembly clearance , see formula 8.

[0083]

[0084] in, It is C B Adjacent face B C The displacement vector.

[0085] like Figure 4 As shown, the following steps ① to ⑨ integrate the finite element method (Equation 6), the variable grid method (Equation 7), the interpolation method (Equation 8), etc.

[0086] ① Read the variables and operators in the assembly relation from left to right and store them into arrays, char1(n), char2(n) and oper(n-1). Taking equation 5 as an example, char1(1), char2(1) and oper(1) are equal to X1, A1 and "." respectively. Let the natural number i be 1. Let the integers m, j and k be 0.

[0087] ②If oper(i) is like Figure 1 As shown, The part where multiple adjacent strings are located is in an over-constrained state and requires one pass and one springback calculation, as follows.

[0088] ·Count the number of oper(i+1), oper(i+2)…oper(i+m-1) after oper(i) The number m.

[0089] For each set of grids of parts char1(i)…char1(i+m), substitute char1(i) char2(i) …char1(i+m) char2(i+m) The finite element calculation outputs the coordinates of all nodes of these parts and the surface char1(i) char2(i) …char1(i+m) char2(i+m) The node force.

[0090] · Use the variable mesh method 7 to add the part node displacement to the part node coordinates.

[0091] ·Surface char1(i) char2(i) …char1(i+m) char2(i+m) The nodal forces are the input of the finite element calculation, and the parts are all parts char1(i)…char1(i+m). The finite element calculation outputs the nodal displacements of these parts and outputs the surface char1(i) char2(i) …char1(i+m) char2(i+m) The node displacement.

[0092] · Use the variable mesh method 7 to add the part node displacement to the part node coordinates.

[0093] Let i be the sum of i and m.

[0094] ③ Update the values ​​of j and k for oper(i). If oper(i) is "*", update the values ​​of char1(i) on both sides of the "*" char2(i) and char1(i+1) char2(i+1) The assembly clearance is used as the input boundary condition for the finite element calculation of subsequent parts. The number of the subsequent part is the common number of the character strings on both sides of the "." after oper(i).

[0095] ④ If oper(i) is “.”, a finite element calculation is performed for the parts with the same number as the character strings on both sides of the “.”, as follows.

[0096] ·Count the character string to the left of "." as char1(ij) char2(i-j) …char1(i) char2(i) , count the possible string in parentheses to the right of "." as char1(i+1) char2(i+1) …char1(i+k) char2(i+k) The character string char1(ij)…char1(i) will be the same as char2(i+1)…char2(i+k), which indicates the parts corresponding to the finite element calculation.

[0097] ·Char1(ij) char2(i-j) …char1(i) char2(i) are the input displacements for the finite element calculation of these parts. The finite element calculation outputs the coordinates of all nodes of these parts and the output surface char2(i+1) char1(i+1) …char2(i+k) char1(i+k) If there are 2 or more surfaces connected by “*” on the left side of “.”, the finite element calculation needs to output the surface char1(ij) char2(i-j) …char1(i) char2(i) The node force.

[0098] · Use the variable mesh method 7 to add the part node displacement to the part node coordinates.

[0099] ⑤ If there are more than one surface connected by "*" on the left side of ".", it means char1(ij) char2(i-j) …char1(i) char2(i) Parallel to char1(i+1) char2(i+1) …char1(i+k) char2(i+k) ,For example, Figure 3 Parts 8 and 9 in the figure jointly support part 7. Surface 7-1 contacts surface 8-1, and surface 7-2 contacts surface 9-1. Part 7 is in an over-constrained state and needs to perform a springback.

[0100] Surface char1(ij) char2(i-j) …char1(i) char2(i) The nodal forces are the input of the finite element calculation. The parts are all the parts corresponding to n less than i in char1(n). The finite element calculation outputs all the nodal displacements of these parts and outputs the surface char2(i+1) char1(i+1) …char2(i+k) char1(i+k) The node displacement.

[0101] · Use the variable mesh method 7 to add the part node displacement to the part node coordinates.

[0102] ⑥If char2(i+1) char1(i+1) …char2(i+k) char1(i+k) is the key surface, then the surface char2(i+1) is interpolated by the interpolation function 9. char1(i+1) …char2(i+k) char1(i+k) The transferred value of the displacement is added to the surface char1(i+1) char2(i+1) …char1(i+k) char2(i+k) . Let i be the sum of i, j and k, and return to step ②. Otherwise, proceed to step ⑦.

[0103] ⑦ Subtract the final key point coordinates from the initial key point coordinates to obtain the key point deformation. After numerical processing, the coaxiality, flatness, roundness and other indicators are obtained.

[0104] ⑧ Determine whether the next surface of the operator is on the fluid domain. If so, execute the following steps.

[0105] Convert fluid meshes to solid meshes.

[0106] Use keypoint displacements as boundary conditions for the solid mesh.

[0107] Perform a finite element calculation on the solid mesh and output the nodal displacements of the solid mesh.

[0108] · Use the variable mesh method to add node displacements to the fluid mesh.

[0109] Conduct computational fluid dynamics analysis and output corresponding result indicators.

[0110] ⑨ Determine whether the next surface of the operator corresponds to the modal characteristics. If so, perform modal calculations on the deformed grid and output the corresponding result indicators.

[0111] ⑩ The numerical sampling method is used to obtain the response of the key functional surface Ke to the assembly clearance disturbance, δ Ke .

[0112] For each key point i, δ Ke The offset of the relevant physical quantities in the three axes 1, 2, and 3 is provided. Given the allowable value Δ and the safety factor k of this indicator, Equation 9 can be used for performance verification.

[0113]

[0114] The above process is an implementation form of the present invention by integrating numerical methods such as finite element method. In a specific programming language and multi-physics field simulation environment, similar variable definitions and process designs are also within the protection scope of the present invention.

Claims

1. A method for representing assembly relationships and transferring deformation, characterized in that: It includes variables with two elements, synchronization operators, parallel operators, sequence operators, assembly relational expressions, operation rules, and deformation transfer methods; the variables with two elements represent a surface of a certain size, located on a part or a physical field; the variables with two elements are connected to each other through synchronization operators, parallel operators, and sequence operators to form an assembly relational expression; the assembly relational expression expresses a general assembly relationship in a reading order from left to right; The deformation transfer method is a numerical method that integrates the continuous physical field deformation calculation of each part according to the number of variables and operator types in the assembly relationship; One element of the variable having two elements is the time period during which the surface exists due to being identified, and the other element is a physical quantity displacement, wherein the physical quantity displacement represents the fit clearance of the contact surface, or the displacement, force or temperature on the functional surface; The synchronous operator indicates the synchronous docking formation of multiple parts matching surfaces, the parallel operator indicates the parallel installation formation of multiple parts matching surfaces, and the sequence operator indicates the sequential installation formation of multiple parts matching surfaces; The operators and variables in the assembly relational expression are read from left to right to obtain that the faces formed by the sequential, parallel and synchronous assemblies have time periods and physical quantity displacements due to being identified.

2. The assembly relationship representation and deformation transfer method according to claim 1, characterized in that: A general assembly relation is composed of a variable with two elements, a synchronization operator, a sequence operator, and a parallel operator.

3. The assembly relationship representation and deformation transfer method according to claim 1 or 2, characterized in that: By searching each variable name in the assembly relation, the physical quantity displacement data in this variable is obtained, that is, the shape and quality of the equipment in the corresponding assembly process.

4. The assembly relationship representation and deformation transfer method according to claim 1, characterized in that: The deformation transfer method is to read the variables and operators in the parts assembly relationship, count the number of variables, determine whether the operator is a synchronous, parallel or sequential type, call the corresponding numerical method according to the number of variables and the type of operator, and calculate the shape of the equipment in each assembly process and the shape of the equipment after assembly.

5. The assembly relationship representation and deformation transfer method according to claim 1 or 4, characterized in that: The parts corresponding to the adjacent variables on both sides of the synchronization operator need to call the physical field deformation calculation twice for transmission and rebound.

6. The assembly relationship representation and deformation transfer method according to claim 1 or 4, characterized in that: The physical quantity displacements of the variables on both sides of the parallel operator are the input physical quantity displacements of the part physical field deformation calculation corresponding to the variables connected by the right-hand sequence or synchronization operator.

7. The assembly relationship representation and deformation transfer method according to claim 1 or 4, characterized in that: The parts corresponding to the variables on both sides of the sequence operator need to call the physical field deformation calculation for transmission. If the parallel operator on the left side of the sequence operator is connected to more than one variable, the physical field deformation calculation needs to be called again for rebound.

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