Based on ship design software standard library and special works hole parameterization configuration modeling method

Abstract

This invention, based on a ship design software standard library and a parametric configuration modeling method for irregularly shaped manholes, belongs to the field of ship design technology. This invention combines the characteristics of manholes to enable production designers to efficiently complete manhole modeling. Based on the positioning origin and normal axis of the irregularly shaped manhole group established in this invention, production designers can intuitively obtain the positioning of the manholes according to the manhole design scheme without the need for additional process layout. This invention provides a parametric calculation method for feature points of various types of manholes in an irregularly shaped manhole group. Each type of irregularly shaped manhole can be created using a design software standard library with a minimal number of parameters. It should be noted that the parametric calculation method for feature points of irregularly shaped manholes in this invention is based on the positioning origin and normal axis of the manhole group established in this invention. By introducing a manhole group and the corresponding software standard library, the modeling of irregularly shaped manholes is simplified.

Description

Technical Field

[0001] This invention relates to a modeling method for parametric configuration of irregularly shaped manholes based on a standard library of ship design software, and belongs to the field of ship design technology. Background Technology

[0002] During shipbuilding, numerous temporary process holes (hereinafter referred to as "workholes") exist on hull sections and main sections. These holes are used for personnel passage, pipeline laying, ventilation and smoke extraction, and section hoisting. After the work is completed, these workholes need to be repaired. To improve the utilization rate of ship steel plates and restore the strength of the repaired plates, the original plates cut from the workholes are usually used for restoration. Although CNC cutting equipment has an automatic hole-opening function, the arc-starting and arc-extinguishing process of CNC cutting can damage the original plate inside the hole, leaving obvious cutting defects on the original plate, making it unusable for restoration. Therefore, the traditional method of cutting workholes mainly relies on manual marking on-site based on design drawings, or creating CNC marking data for CNC cutting equipment to mark, and then workers use flame cutting machines or plasma semi-automatic cutting machines to manually or semi-automatically cut the hole outline and beveling. This traditional method has obvious drawbacks such as low efficiency, difficulty in guaranteeing accuracy, and unstable cutting quality.

[0003] In recent years, some shipyards in the industry have proposed a new type of fortification hole by "equivalent conversion" (as shown in the attached figure). Figure 1 By incorporating force into the design model and introducing a small cutting arc, the manholes can be automatically cut using CNC cutting equipment. However, a problem arises because the manholes obtained through "equivalent transformation" are all irregularly shaped holes, making it impossible to apply force to the model using the standard library preset in the design software. Currently, the industry mainly relies on designers to create two-dimensional closed curves based on the shape and size of the manholes, and then apply force to the manhole model using these closed curves. Furthermore, due to the influence of the ship's structure, the shape and size of manholes in different locations vary, making it impossible to achieve rapid force application using preset closed curves. Clearly, the method of applying force to the manhole model using two-dimensional closed curves is not an efficient approach. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a set of manhole combinations based on the standard library of ship design software. This allows designers to quickly model manholes by calling the standard library and through parameterization. Furthermore, based on different types of openings within the combination, manholes of any common shape can be created by combining one or more openings.

[0005] The technical solution adopted in this invention is: a parametric configuration modeling method for irregularly shaped fortification holes based on a standard library of ship design software, including the step of calling ship 3D design software to create an opening model, comprising the following steps:

[0006] S1. Construct a standard library of irregular-shaped construction holes, which includes two types of holes: independently used construction holes and combined construction holes.

[0007] The independently used working holes include circular working holes (TMD), oval working holes (TMHO), and square-round working holes (TMHR); the combined working holes include I-shaped working holes (TMI), L-shaped working holes (TML), and C-shaped working holes (TMC); all working holes have rounded ends with a radius equal to half the hole width.

[0008] S2. Unify the positioning reference system for all manholes: Based on the geometric characteristics of the manhole's own contour, define the position of the origin O and the positive orientation of the U-axis: For independently used manholes with annular openings, the positioning origin O is taken as the geometric center of the annular contour, and the positive orientation of the U-axis determines the placement angle of the annular opening; for combined manholes, the positioning origin O is set at the reference endpoint at the end of the manhole, and the positive orientation of the U-axis is arranged along the extension direction of the straight section of the manhole.

[0009] The origin O determines the overall spatial position of the borehole, and the normal reference axis U determines the rotation angle for placing the borehole. When the borehole rotates around the origin O, the U-axis and V-axis deflect synchronously with the borehole, and the relative orientation of the coordinate axes with respect to the borehole body remains unchanged.

[0010] S3. Preset global fixed process parameters: construction joint width w, independent construction hole bridge width m, w value is 6~8mm;

[0011] S4. Selection rules for feature points of the borehole: Feature points are arranged along the outline of the borehole, and inner wall feature points and outer wall feature points are set in pairs at the same radial or width position; feature points are preferentially selected at geometric boundaries such as the end of the borehole opening, the tangent point between the straight segment and the arc segment, and the extreme position of the arc, to completely divide the straight segment and the arc segment of the outline; the relative position of the feature points is determined by the local coordinate system O-UV of the borehole; when the borehole rotates around the positioning origin O as a whole, the relative position of all feature points with respect to the borehole body remains unchanged;

[0012] S5. Configure minimum modeling specification parameters for each type of manhole in the standard library, and establish parameterized coordinate calculation formulas for all feature points of the corresponding manhole based on the local coordinate system O-UV. Connect all feature points to form the closed contour curve of the manhole.

[0013] S6. Receive the type, specifications, spatial positioning coordinates, and angle θ between the major and minor axes of the hole from the designer, and substitute them into the corresponding feature point coordinate calculation formula to solve for the coordinates of all feature points.

[0014] S7. Generate a closed curve based on the coordinates of the feature points obtained from the solution, and complete the parameterized model input of the irregular fortification hole in the ship 3D design software;

[0015] S8. If the outline of the target manhole cannot be equivalently realized by a single manhole, select at least two types of manholes from the standard library to combine and model, and reserve a bridge section between adjacent manholes to avoid cutting interference.

[0016] Furthermore, the circular construction hole TMD is configured with only a single specification parameter of diameter D, and includes 6 feature points a1~a6. The UV coordinates of each feature point are solved using the corresponding coordinate formula.

[0017] The oval-shaped working hole TMHO is configured with two sets of specifications: total length A and cross-sectional width B, and includes 16 feature points b1~b16.

[0018] The square-round construction hole TMHO is configured with four sets of specifications: total length A, cross-sectional width B, end arc radius R, and overall rotation angle θ, including 20 feature points c1~c20;

[0019] The I-shaped working hole TMI is configured with a single specification parameter of length L, including 4 feature points d1~d4;

[0020] The L-shaped working hole TML and the C-shaped working hole TMC are each configured with four sets of specifications: total length A, cross-sectional width B, corner radius R, and rotation angle θ, which correspond to 8 feature points e1~e8 and 12 feature points f1~f12, respectively.

[0021] Furthermore, the rounded transition structure at the ends of all the work holes is used to smoothly rotate the cutting flame during CNC cutting, avoiding heat concentration at right angles that could damage the original sheet metal. After cutting, the original sheet metal with the work holes can be directly used for segmented patching and restoration.

[0022] A parametric standard library for irregularly shaped shipwork holes, stored within ship 3D design software, is used to implement the aforementioned modeling method; the standard library includes:

[0023] The library classification module is used to distinguish between manholes used independently and manholes used in combination;

[0024] The benchmark definition module has a built-in unified local coordinate system O-UV positioning rule, with the origin O being the geometric center of the construction hole, the U-axis being the normal axis, and the V-axis being orthogonal to the U-axis.

[0025] The parameter storage module pre-stores global process constants: the width of the joint in the fortification, w, and the width of the bridge over the independent fortification hole, m.

[0026] The hole type feature database stores six types of standardized irregular-shaped construction holes: circular construction hole TMD, oval construction hole TMHO, square-round construction hole TMHR, I-shaped construction hole TMI, L-shaped construction hole TML, and C-shaped construction hole TMC; each type of construction hole is equipped with a minimum specification parameter group and a parameterized coordinate calculation formula for all feature points.

[0027] The modeling and calculation module receives external inputs such as hole type, size, position, and the angle θ between the major and minor axes of the hole. It then calls the corresponding feature point coordinate formula to solve for the point position and outputs the closed contour curve to the 3D modeling module.

[0028] The combined modeling module supports the splicing of multiple types of engineering holes to generate composite irregular openings, and the generation of process bridge sections between adjacent holes.

[0029] Furthermore, all the ends of the outlines of the manholes in the warehouse are provided with a rotary arc, the radius of which is equal to 1 / 2 of the width w of the manhole joint.

[0030] Furthermore, the circular manhole TMD only requires a single parameter, diameter D, to complete the solution of all feature points, with the feature points distributed in pairs on the inner and outer annular walls of the manhole; the feature points of the oval manhole TMHO and the square-round manhole TMHR are arranged in sections along the bottom opening straight section, the two end arcs, and the upper straight section, with each geometric position configured with inner and outer pairs of feature points.

[0031] Compared with existing technologies, this invention has the following advantages: This invention innovatively proposes the concept of a group of irregularly shaped construction holes and provides six types of such holes. The combination of these six types of irregularly shaped construction holes can meet the needs of the vast majority of construction hole applications in the industry. In this invention, considering the characteristics of construction holes, and to enable production designers to efficiently complete the modeling of construction holes, this invention fully considers the positioning origin and normal axis of the irregularly shaped construction hole group. Based on the positioning origin and normal axis of the irregularly shaped construction hole group set in this invention, production designers can intuitively obtain the positioning of the construction holes based on the construction hole design scheme without the need for additional process layout.

[0032] This paper provides a parameterized calculation method for feature points of various types of irregularly shaped holes in a group of holes. Each type of irregularly shaped hole can be created using a minimal number of parameters to establish a standard library in the design software. It is important to note that the parameterized calculation method for feature points of irregularly shaped holes in this paper is based on the location origin and normal axis of the hole group defined in this paper. By introducing a group of holes and the corresponding standard software library, this paper simplifies the modeling of irregularly shaped holes. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 It is an equivalent conversion type of the construction hole.

[0035] Figure 2 This is a schematic diagram of a TMD-type working hole.

[0036] Figure 3 This is a schematic diagram of a TMHO type working hole.

[0037] Figure 4 This is a schematic diagram of a TMHR type working hole.

[0038] Figure 5 This is a schematic diagram of a TMI-type working hole.

[0039] Figure 6 This is a schematic diagram of a TML-type working hole.

[0040] Figure 7 This is a schematic diagram of a TMC-type working hole.

[0041] Figure 8 This is an example of a scenario where a combined type of manhole can be applied.

[0042] Figure 9 This is a schematic diagram of the circular arc at the end of the excavation hole.

[0043] Figure 10 It is a scheme for setting the origin and normal axis of the engineering hole.

[0044] Figure 11 This is a diagram showing the parameters w / m for the borehole.

[0045] Figure 12 This is a diagram showing the configuration parameters and feature points of the TMD construction hole.

[0046] Figure 13 This is a diagram showing the configuration parameters and feature points of the TMHO construction hole.

[0047] Figure 14 This is a diagram showing the configuration parameters and feature points of the TMHR construction hole.

[0048] Figure 15 This is a diagram showing the TMI working hole configuration parameters and feature points.

[0049] Figure 16 This is a diagram showing the TML hole configuration parameters and feature points.

[0050] Figure 17 This is a diagram showing the TMC working hole configuration parameters and feature points. Detailed Implementation

[0051] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0052] This project utilizes 3D design software (such as AM, TRIBON, SPD, etc.) to create a standard library of manholes. By combining one or more manholes from the standard library, various types of manholes commonly used in shipbuilding can be covered. Designers can select the corresponding manhole type from the type library according to actual needs and set parameters such as its position, size, orientation, and bevel. Complex-shaped manholes can be parametrically written into the model.

[0053] The following section provides a detailed explanation of the various types of manholes in the manhole group in this case and the necessary parameters required for creating a standard library.

[0054] Example 1: Establishing a Standard Library for Construction Holes

[0055] In the context of this case, the manholes in the standard library (hereinafter referred to as the "standard library") are divided into two categories according to their usage scenarios: manholes used independently and manholes used in combination.

[0056] Independent use of fortification holes: This refers to fortification holes in the ship's hull structure where there are no special structures around them, and opening the fortification hole does not affect the surrounding structure. The fortification hole model can be completed by calling the fortification hole from the standard library alone. Based on the common fortification hole types in the industry, this type of fortification hole library should include the following types of fortification holes:

[0057] A) Circular TMD (TempManholeD_Type), its schematic diagram is as follows: Figure 2 As shown;

[0058] B) Oval-shaped construction hole TMHO (TempManholeHO_Type), its schematic diagram is as follows: Figure 3 As shown;

[0059] C) Square / round construction hole TMHR (TempManholeHR_Type), its schematic diagram is as follows: Figure 4 As shown;

[0060] Combined use of construction holes: This refers to construction holes in ship hull structures where, due to the influence of surrounding structures or construction process requirements, a single construction hole cannot equivalently replace the required hole style. Multiple construction holes must be combined, or a single construction hole combined with an inherent structural plate joint, or multiple construction holes combined with an inherent structural plate joint, to achieve an equivalent replacement of the required hole. This type of construction hole library must include the following types of construction holes:

[0061] D) "I"-shaped working hole TMI (TempManholeI_Type), the schematic diagram of which is shown below. Figure 5 As shown;

[0062] E) "L"-shaped construction hole TML (TempManholeL_Type), the schematic diagram of which is shown below. Figure 6 As shown;

[0063] F), "C"-shaped construction hole TMC (TempManholeC_Type), its schematic diagram is as follows: Figure 7 As shown;

[0064] It is important to note that when using a combination of boreholes for model input, a "bridge" should be left between the boreholes to prevent them from interfering with each other during steel cutting and causing defects in the part's quality. The length of this "bridge" depends on the positioning of the boreholes during modeling, not on the boreholes' inherent parameters (unlike a "bridge" used when boreholes are used independently). Specific application examples are attached. Figure 8 Indication.

[0065] It should also be noted that the design of the construction holes in this case uses a rounded transition at the ends of the holes (as shown in the attached image). Figure 9 The radius of the arc is half the width of the hole. The purpose is to ensure that the cutting flame rotates smoothly in a narrow space during the cutting process, and to avoid right-angle transitions that would cause the heat of the cutting flame to concentrate and damage the parts.

[0066] Example 2: Parametric Definition Rules for the Standard Library of Construction Holes

[0067] In commonly used design software, parametrically defining openings typically requires two sets of parameters: 1. positioning parameters; 2. specification parameters. Therefore, configuring a standard library of boreholes requires determining the reference points for borehole positioning and setting a method for calculating borehole specification parameters based on these reference points. This paper provides a scheme for determining reference points for borehole positioning and a matching method for calculating specification parameters.

[0068] 1. Scheme for determining the reference points for positioning the working hole

[0069] In ship design, the positioning of all openings requires two elements: a positioning origin and a normal axis. The positioning origin determines the position of the opening, and the normal axis determines the placement angle of the opening (a "circle" is an arbitrary axisymmetric figure, and the normal axis can be ignored when defining an opening). In this case, all manholes need to be configured with a positioning origin and a normal axis. Considering the shape of the manholes proposed in this case and the application scenario in the ship design process, the positioning origin and normal axis of the manholes are set as shown in the attached figure. Figure 10 As shown, O is the origin of the drilling hole, and the U-axis is the normal axis.

[0070] 2. Parametric Configuration of Feature Point Calculation Method for Engineering Holes

[0071] Currently, mainstream design software in the industry uses the logic of connecting the feature points of the hole to form a closed curve for parametric configuration of openings. This case will follow this logic and provide parametric coordinates of feature points of various types of engineering holes based on the positioning origin of the engineering hole in this case. It should be noted that the "engineering hole" proposed in this case can be referred to as "engineering seam" to a certain extent. In the welding process of "engineering seam" in the industry, the weld gap is generally 6~8mm. Therefore, the width of the "engineering hole" proposed in this case needs to be set according to the weld process requirements (6~8mm). In a single shipyard, this value is a fixed value and can be defined as a constant. In this case, in order to provide a more scientific parametric calculation method, this parameter is set as w. Similarly, the "bridge" of independently used engineering holes (TMD / TMHO / TMHR) can also be defined as a constant in a single shipyard. In this case, this parameter will be set as m (as shown in the attached figure). Figure 11 The parameters w and m apply to any hole in the hole group in this case, and will not be repeated in the following specific cases.

[0072] Specifically, the parametric configuration modeling method for irregularly shaped fortification holes based on the standard library of ship design software includes the step of calling ship 3D design software to create an opening model, including the following steps:

[0073] S1. Construct a standard library of irregular-shaped construction holes, which includes two types of holes: independently used construction holes and combined construction holes.

[0074] The independently used working holes include circular working holes (TMD), oval working holes (TMHO), and square-round working holes (TMHR); the combined working holes include I-shaped working holes (TMI), L-shaped working holes (TML), and C-shaped working holes (TMC); all working holes have rounded ends with a radius equal to half the hole width.

[0075] S2. Unify the positioning reference system for all manholes: Based on the geometric characteristics of the manhole's own contour, define the position of the origin O and the positive orientation of the U-axis: For independently used manholes with annular openings, the positioning origin O is taken as the geometric center of the annular contour, and the positive orientation of the U-axis determines the placement angle of the annular opening; for combined manholes, the positioning origin O is set at the reference endpoint at the end of the manhole, and the positive orientation of the U-axis is arranged along the extension direction of the straight section of the manhole.

[0076] The origin O determines the overall spatial position of the borehole, and the normal reference axis U determines the rotation angle for placing the borehole. When the borehole rotates around the origin O, the U-axis and V-axis deflect synchronously with the borehole, and the relative orientation of the coordinate axes with respect to the borehole body remains unchanged.

[0077] S3. Preset global fixed process parameters: construction joint width w, independent construction hole bridge width m, w value is 6~8mm;

[0078] S4. Selection rules for feature points of the borehole: Feature points are arranged along the outline of the borehole, and inner wall feature points and outer wall feature points are set in pairs at the same radial or width position; feature points are preferentially selected at geometric boundaries such as the end of the borehole opening, the tangent point between the straight segment and the arc segment, and the extreme position of the arc, to completely divide the straight segment and the arc segment of the outline; the relative position of the feature points is determined by the local coordinate system O-UV of the borehole; when the borehole rotates around the positioning origin O as a whole, the relative position of all feature points with respect to the borehole body remains unchanged;

[0079] S5. Configure minimum modeling specification parameters for each type of manhole in the standard library, and establish parameterized coordinate calculation formulas for all feature points of the corresponding manhole based on the local coordinate system O-UV. Connect all feature points to form the closed contour curve of the manhole.

[0080] S6. Receive the type, specifications, spatial positioning coordinates, and angle θ between the major and minor axes of the hole from the designer, and substitute them into the corresponding feature point coordinate calculation formula to solve for the coordinates of all feature points.

[0081] S7. Generate a closed curve based on the coordinates of the feature points obtained from the solution, and complete the parameterized model input of the irregular fortification hole in the ship 3D design software;

[0082] S8. If the outline of the target manhole cannot be equivalently realized by a single manhole, select at least two types of manholes from the standard library to combine and model, and reserve a bridge section between adjacent manholes to avoid cutting interference.

[0083] The following are the methods for calculating the parametric coordinates of feature points for various types of fortification holes:

[0084] Example 3: Coordinate Calculation of Circular TMD Hole

[0085] 1 parameter (diameter D), 6 feature points (a1~a6), see appendix Figure 12 :

[0086] a1:U: V: ;

[0087] a2: U: -(D / 2+w / 2); V: 0;

[0088] a3:U: V: ;

[0089] a4:U: V: ;

[0090] a5: U: -(D / 2-w / 2); V: 0;

[0091] a6:U: V: ;

[0092] Example 4: Coordinate Calculation of Circular Work Hole TMHO

[0093] 2 parameters (length A of the hole, width B of the hole), 16 feature points (b1~b16), see appendix. Figure 13 :

[0094] b1: U:m / 2; V:-(B / 2-w / 2);

[0095] b2:U:A / 2-B / 2; V:-(B / 2-w / 2);

[0096] b3: U:A / 2-w / 2; V:0;

[0097] b4: U: A / 2-B / 2; V: B / 2-w / 2;

[0098] b5: U:-(A / 2-B / 2); V:B / 2-w / 2

[0099] b6: U:-(A / 2-w / 2); V:0;

[0100] b7: U:-(A / 2-B / 2); V:-(B / 2-w / 2);

[0101] b8: U:-m / 2; V:-(B / 2-w / 2);

[0102] b9: U:-m / 2; V:-(B / 2+w / 2);

[0103] b10: U:-(A / 2-w / 2); V:-(B / 2+w / 2);

[0104] b11: U:-(A / 2+w / 2); V:0;

[0105] b12:U:-(A / 2-B / 2); V:B / 2+w / 2;

[0106] b13:U:A / 2-B / 2; V:B / 2+w / 2;

[0107] b14: ​​U:A / 2+w / 2; V:0;

[0108] b15: U:A / 2-B / 2; V:-(B / 2+w / 2);

[0109] b16: U:-m / 2; V:-(B / 2+w / 2).

[0110] Example 5: Coordinate Calculation of Square-Round Manhole TMHO

[0111] It should be noted that in practical applications, the major and minor axes of square-round holes may have a certain angle (the standard square-round hole is a special case where the angle between the major and minor axes is 90°). This solution provides a general calculation method. It includes 4 parameters (A, B, R, θ) and 20 feature points (b1~b20), see appendix. Figure 14 :

[0112] c1:U: V:-(B / 2-w / 2);

[0113] c2:U: V:-(B / 2-w / 2);

[0114] c3:U: V: ;

[0115] c4:U: V: ;

[0116] c5:U: ;V:B / 2-w / 2;

[0117] c6:U: ;V:B / 2-w / 2;

[0118] c7:U: V: ;

[0119] c8:U: V: ;

[0120] c9:U: V:-(B / 2-w / 2)

[0121] c10:U: V:-(B / 2-w / 2);

[0122] c11:U: V:-(B / 2+w / 2);

[0123] c12:U: V:-(B / 2+w / 2)

[0124] c13:U: V: ;

[0125] c14:U: V: ;

[0126] c15:U: V:B / 2+w / 2;

[0127] c16:U: V:B / 2+w / 2;

[0128] c17:U: V: ;

[0129] c18:U: V: ;

[0130] c19:U: V:-(B / 2+w / 2);

[0131] c20:U: V:-(B / 2+w / 2);

[0132] Example 6: Coordinate Calculation of the "I"-Shaped Manhole TMI

[0133] 1 parameter (hole length L), 4 feature points (d1~d4), see appendix Figure 15 :

[0134] d1: U:L; V:m / 2;

[0135] d2: U:0; V:m / 2;

[0136] d3: U: 0; V: -m / 2;

[0137] d3: U:L; V:-m / 2;

[0138] Example 7: Coordinate Calculation of the "L"-shaped Work Hole TML

[0139] It should be noted that in practical applications, the major and minor axes of an "L"-shaped hole may have a certain angle (the standard "L" shape is a special case where the angle between the major and minor axes is 90°). This solution provides a general calculation method. It includes 4 parameters (major axis A of the hole, minor axis B of the hole, diameter R of the arc connecting the major and minor axes, and the angle θ between the major and minor axes) and 20 feature points (e1~e8), see appendix. Figure 16 :

[0140] e1:U: V: ;

[0141] e2:U: V: ;

[0142] e3:U: ;V:Bw / 2;

[0143] e4:U: ;V:Bw / 2;e5:U: V:B+w / 2;

[0144] e6:U: V:B+w / 2;

[0145] e7:U: V: ;

[0146] e8:U: V: .

[0147] Example 7: Coordinate Calculation of the "C"-Shaped Work Hole TMC

[0148] It should be noted that in practical applications, the major and minor axes of a "C"-shaped hole may have a certain angle (the standard "C" shape is a special case where the angle between the major and minor axes is 90°). This case provides a general calculation method. The parameters are: 4 parameters (major axis A, minor axis B, diameter R of the arc connecting the major and minor axes, and the angle θ between the major and minor axes), and 20 feature points (f1~f12), see appendix. Figure 17 :

[0149] f1:U: V: ;

[0150] f2:U: V: ;

[0151] f3:U: ;V:Bw / 2;

[0152] f4:U: ;V:Bw / 2;

[0153] f5:U: V: ;

[0154] f6:U: V:

[0155] f7:U: V:

[0156] f8:U: V: ;

[0157] f9:U: V:B+w / 2;

[0158] f10:U: V:B+w / 2;

[0159] f11:U: V: ;

[0160] f12:U: V: .

[0161] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A parametric configuration modeling method for irregularly shaped fortification holes based on a standard library of ship design software, comprising the step of calling ship 3D design software to create an opening model, characterized in that, Includes the following steps: S1. Construct a standard library of irregular-shaped construction holes, which includes two types of holes: independently used construction holes and combined construction holes. The independently used working holes include circular working holes (TMD), oval working holes (TMHO), and square-round working holes (TMHR); the combined working holes include I-shaped working holes (TMI), L-shaped working holes (TML), and C-shaped working holes (TMC); all working holes have rounded ends with a radius equal to half the hole width. S2. Unify the positioning reference system for all manholes: Based on the geometric characteristics of the manhole's own contour, define the position of the origin O and the positive orientation of the U-axis: For independently used manholes with annular openings, the positioning origin O is taken as the geometric center of the annular contour, and the positive orientation of the U-axis determines the placement angle of the annular opening; for combined manholes, the positioning origin O is set at the reference endpoint at the end of the manhole, and the positive orientation of the U-axis is arranged along the extension direction of the straight section of the manhole. The origin O determines the overall spatial position of the borehole, and the normal reference axis U determines the rotation angle for placing the borehole. When the borehole rotates around the origin O, the U-axis and V-axis deflect synchronously with the borehole, and the relative orientation of the coordinate axes with respect to the borehole body remains unchanged. S3. Preset global fixed process parameters: construction joint width w, independent construction hole bridge width m, w value is 6~8mm; S4. Selection rules for feature points of the borehole: Feature points are arranged along the outline of the borehole, and inner wall feature points and outer wall feature points are set in pairs at the same radial or width position; feature points are preferentially selected at geometric boundaries such as the end of the borehole opening, the tangent point between the straight segment and the arc segment, and the extreme position of the arc, to completely divide the straight segment and the arc segment of the outline; the relative position of the feature points is determined by the local coordinate system O-UV of the borehole; when the borehole rotates around the positioning origin O as a whole, the relative position of all feature points with respect to the borehole body remains unchanged; S5. Configure minimum modeling specification parameters for each type of manhole in the standard library, and establish parameterized coordinate calculation formulas for all feature points of the corresponding manhole based on the local coordinate system O-UV. Connect all feature points to form the closed contour curve of the manhole. S6. Receive the type, specifications, spatial positioning coordinates, and angle θ between the major and minor axes of the hole from the designer, and substitute them into the corresponding feature point coordinate calculation formula to solve for the coordinates of all feature points. S7. Generate a closed curve based on the coordinates of the feature points obtained from the solution, and complete the parameterized model input of the irregular fortification hole in the ship 3D design software; S8. If the outline of the target manhole cannot be equivalently realized by a single manhole, select at least two types of manholes from the standard library to combine and model, and reserve a bridge section between adjacent manholes to avoid cutting interference.

2. The parametric configuration modeling method for irregularly shaped fortification holes based on a ship design software standard library according to claim 1, characterized in that: The circular working hole TMD is configured with only a single specification parameter of diameter D, and contains 6 feature points a1~a6. The UV coordinates of each feature point are solved using the corresponding coordinate formula. The oval-shaped working hole TMHO is configured with two sets of specifications: total length A and cross-sectional width B, and includes 16 feature points b1~b16. The square-round construction hole TMHO is configured with four sets of specifications: total length A, cross-sectional width B, end arc radius R, and overall rotation angle θ, including 20 feature points c1~c20; The I-shaped working hole TMI is configured with a single specification parameter of length L, including 4 feature points d1~d4; The L-shaped working hole TML and the C-shaped working hole TMC are each configured with four sets of specifications: total length A, cross-sectional width B, corner radius R, and rotation angle θ, which correspond to 8 feature points e1~e8 and 12 feature points f1~f12, respectively.

3. The parametric configuration modeling method for irregularly shaped fortification holes based on a ship design software standard library according to claim 1, characterized in that, All the rounded transition structure at the ends of the work holes is designed to allow for smooth rotation of the cutting flame during CNC cutting, avoiding heat concentration at right angles that could damage the original sheet material. After cutting, the original sheet material with the work holes can be directly used for segmented patching and restoration.

4. A parametric standard library for irregularly shaped shipwork holes, stored within ship 3D design software, characterized in that... This standard library is used to implement the modeling method described in any one of claims 1-3; the standard library includes: The library classification module is used to distinguish between manholes used independently and manholes used in combination; The benchmark definition module has a built-in unified local coordinate system O-UV positioning rule, with the origin O being the geometric center of the construction hole, the U-axis being the normal axis, and the V-axis being orthogonal to the U-axis. The parameter storage module pre-stores global process constants: the width of the joint in the fortification, w, and the width of the bridge over the independent fortification hole, m. The hole type feature database stores six types of standardized irregular-shaped construction holes: circular construction hole TMD, oval construction hole TMHO, square-round construction hole TMHR, I-shaped construction hole TMI, L-shaped construction hole TML, and C-shaped construction hole TMC; each type of construction hole is equipped with a minimum specification parameter group and a parameterized coordinate calculation formula for all feature points. The modeling and calculation module receives external inputs such as hole type, size, position, and the angle θ between the major and minor axes of the hole. It then calls the corresponding feature point coordinate formula to solve for the point position and outputs the closed contour curve to the 3D modeling module. The combined modeling module supports the splicing of multiple types of engineering holes to generate composite irregular openings, and the generation of process bridge sections between adjacent holes.

5. A parameterized standard library for irregularly shaped shipwork holes according to claim 4, characterized in that, All the ends of the outlines of the holes in the warehouse are provided with a circular arc, the radius of which is equal to 1 / 2 of the width w of the hole.

6. The parametric standard library for irregularly shaped shipwork holes according to claim 4, characterized in that, The circular tunnel TMD only requires a single parameter, diameter D, to solve for all feature points. The feature points are distributed in pairs on the inner and outer annular walls of the tunnel. The feature points of the oval tunnel TMHO and the square tunnel TMHR are arranged in sections along the bottom opening straight section, the two ends of the arc end, and the upper straight section. Each geometric position is equipped with a pair of inner and outer feature points.

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