Parameterized curved surface pipe library building method for ship pipe system design

Abstract

The invention discloses a parameterized curved-surface pipe library building method for ship pipe system design, which comprises the following steps: 1) creating a pipe parameterized model structure tree, describing curved-surface geometric characteristics of pipes, and building curved-surface pipes; 2) after creating a pipe section curve, stretching a standard length along the axis direction to generate a curved-surface pipe model, defining related parameters and a shaft system, and establishing an association relationship; 3) defining information such as a geometric figure set and a pipe end interface, and issuing a pipe end geometric center shaft system; 4) establishing a pipe design table; 5) adding material information in the pipe parameterized model structure tree, establishing association between the parameterized model and the design table, and realizing one-to-one correspondence between related parameters in the design table and attributes of the model parameter set through attribute management; and 6) analyzing and generating the curved surface standard component based on the pipe parameterized model. The curved surface standard component is analyzed and generated based on the pipe parameterized model, the data size of the model is smaller, and meanwhile pseudo interference in pipe system design can be greatly reduced.

Description

Technical Field

[0001] The invention relates to ship design technology, and in particular to a parameterized curved surface pipe library building method for ship pipe system design. Background Art

[0002] As an important component of ships, the ship pipe system is a large-scale and extensive "blood vessel" system, which is crucial for the normal operation of ships under different working conditions. During the design process, affected by the continuous changes in the overall technical status, the system design has the characteristics of large volume, long cycle, strong correlation, and frequent changes. The design process faces applications such as comprehensive layout, pipeline lofting, interference inspection, and weight and center of gravity statistics. In order to comprehensively consider how to improve the rapid iteration capability of system design under large-scale data volume, it is necessary to deeply explore the underlying modeling and use logic of the pipe system and seek appropriate model expression methods and design means.

[0003] According to previous design experience, pipes in oil-water pipelines and ventilation pipelines are usually expressed in three-dimensional entities with annular or solid cross-sections, and pipe accessories are all modeled based on three-dimensional entities, which makes the amount of pipe system model data large. Due to the surface contact between pipes and equipment and valve accessories, a large number of pseudo-interference phenomena are generated during model interference analysis, and such interference needs to be manually checked, which is time-consuming and laborious. At the same time, shell models are often used in subsequent process analysis, which requires geometric model conversion and cumbersome operations. Therefore, in order to improve the rapid iteration capability of system design and facilitate the efficient express delivery of design model data to meet application requirements such as system design, interference inspection, and process analysis, the present invention provides a parametric surface pipe library building method that serves pipe system design. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a parameterized surface pipe library building method for ship pipe system design in view of the defects in the prior art.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a parameterized curved surface pipe library building method for ship pipe system design, comprising the following steps:

[0006] 1) Create a pipe parametric model structure tree, describe the pipe surface geometry features, and build a curved pipe in combination with a custom module or development tool; the details are as follows:

[0007] Determine the section type of the ship pipeline, and create a pipe parametric structure tree according to the section type; the section types include circular, rectangular, elliptical and oval;

[0008] The pipe parameterized model structure tree is used to store pipe surface geometric features, including pipe surface geometric feature nodes and publishing nodes;

[0009] The pipe surface geometry feature node includes the following leaf nodes: part geometry, parameter set, relationship, geometry set, pipe end interface geometry set;

[0010] The part geometry leaf node is used to create a geometric model;

[0011] The parameter set leaf node is used to define the attribute information including the name, description, standard, material, diameter, specification size, and line density of the pipe surface;

[0012] The relationship leaf node is used to implement parameter definition in combination with a formula or equation, and to add a design table according to the parameters, so as to associate the data in the design table with the parametric curved surface tube model;

[0013] The leaf nodes of the geometric graphics set are used to store the encapsulated parameterized curved surface tube model, which is generated by creating a tube section curve and then stretching the standard length along the axis direction; at the same time, the geometric centers of the sections at both ends of the tube are defined in point form;

[0014] The leaf node of the pipe end interface geometry set is used to define the geometric center axis system of the pipe end face to control the direction of the pipe; each axis system defines the coordinate origin and three vector directions of X, Y, and Z;

[0015] The publishing node is used to publish the geometric center axis system at both ends of the pipe, and is associated with the pipe end interface geometry set node;

[0016] 2) After creating the tube section curve, stretch the standard length along the axis direction to generate a curved tube model, define relevant parameters and axis system, and establish an association relationship;

[0017] 3) Define the geometry set and pipe end interface information, and publish the pipe end geometric center axis system;

[0018] Define the geometric center axis system of the pipe end face according to the leaf node of the pipe end interface geometry set in the pipe parametric model to control the direction of the pipe; each axis system defines the coordinate origin and three vector directions of X, Y, and Z;

[0019] According to the published nodes in the pipe parametric model, they are associated with the pipe end interface geometry set nodes to publish the geometric center axis system at both ends of the pipe.

[0020] 4) Create a pipe design table and hang it under the leaf node of the pipe parametric structure tree;

[0021] 5) Add material information to the pipe parametric model structure tree, establish the association between the parametric model and the design table, and achieve one-to-one correspondence between the relevant parameters in the design table and the model parameter set attributes through attribute management;

[0022] 6) Generate surface standard parts based on the pipe parametric model analysis, store them in the warehouse and save them in the corresponding structure tree.

[0023] According to the above scheme, in step 1), the creation of the pipe parameterized model structure tree includes the following steps:

[0024] 1.1) Log in to the design platform and make sure the setting parameter values ​​are visible by selecting Preferences;

[0025] 1.2) Enter the surface modeling module or development tool to create a new physical product structure for the pipe;

[0026] 1.3) Insert a "3D shape" node at the top node of the physical product structure of the pipe and name it as the pipe surface geometric feature;

[0027] 1.4) Create a cross-section curve and two points on the tube end, connect the two points into a straight line, and generate a curved tube model by sweeping and stretching the circle along the straight line;

[0028] 1.5) Use the formula editor to add parameters such as name, diameter, and diameter, associate length parameters with characteristic dimensions of the curved tube, and automatically generate parameter sets and relationship leaf nodes;

[0029] 1.6) Right-click the tube surface geometry feature node and create a tube end interface geometry set leaf node in insert mode, define the axis system at both ends of the surface tube and publish it;

[0030] 1.7) After the structure tree is created, the coordinate planes and auxiliary points, lines, and surface elements used in the modeling process are set to hidden state;

[0031] 1.8) Save all node information.

[0032] According to the above scheme, in step 2), the curved tube model adopts the curved surface modeling technology, and the model is displayed as a curved surface without thickness to express the maximum external dimensions, that is, the diameter of the round tube is the outer diameter of the tube, and the height and width of the rectangular, elliptical, oval and other special-shaped tube sections correspond to the height and width of the outer wall of the tube; information such as wall thickness and curved surface direction is reflected in the attributes.

[0033] According to the above scheme, in the step 2), in the curved tube model, the pipe material expressed based on the parameterized curved tube achieves line contact with the equipment and valve accessories at the connection.

[0034] According to the above scheme, in the step 2), in the curved tube model, the tube material expressed based on the parameterized curved tube is radially offset by 0.5 times the thickness to generate the neutral layer tube surface;

[0035] According to the above scheme, in step 6), the curved pipe standard part is generated based on the pipe parametric model analysis by associating with the design table or driving with specific parameter values.

[0036] The beneficial effects produced by the present invention are:

[0037] The parametric surface pipe library building method provided by the present invention can meet the applications of system design, interference checking and process simulation, etc. It generates surface standard parts based on the analysis of the pipe parametric model, with a smaller model data volume. At the same time, it can greatly reduce the pseudo-interference in the pipe system design, and quickly provide model data for subsequent process simulation, with high reliability and good stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0039] Figure 1 It is a schematic diagram of the parameterized surface management library building process of an embodiment of the present invention;

[0040] Figure 2 2. It is a schematic diagram of the structure tree of the pipe parameterized model according to an embodiment of the present invention;

[0041] Figure 3 It is a parameterized model of water pipes serving oil-water pipelines according to an embodiment of the present invention;

[0042] Figure 4 It is a parameterized model of a rectangular air pipe serving a ventilation duct according to an embodiment of the present invention.

[0043] Figure 5 It is a schematic diagram of a standard rectangular air duct material generated by analysis according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] 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 embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0045] like Figure 1 As shown, a parameterized surface pipe library building method for ship pipe system design includes the following steps:

[0046] 1) Create a pipe parametric model structure tree, describe the pipe surface geometry features, and build a curved pipe in combination with a custom module or development tool; the details are as follows:

[0047] Determine the section type of the ship pipeline, and create a pipe parametric structure tree according to the section type; the section types include circular, rectangular, elliptical and oval;

[0048] like Figure 2 ,The pipe parametric model structure tree is used to store pipe surface geometric features, including pipe surface geometric feature nodes and publishing nodes;

[0049] The pipe surface geometry feature node includes the following leaf nodes: part geometry, parameter set, relationship, geometry set, pipe end interface geometry set;

[0050] The part geometry leaf node is used to create a geometric model;

[0051] The parameter set leaf node is used to define the attribute information including the name, description, standard, material, diameter, specification size, and line density of the pipe surface;

[0052] The relationship leaf node is used to implement parameter definition in combination with a formula or equation, and to add a design table according to the parameters, so as to associate the data in the design table with the parametric curved surface tube model;

[0053] The leaf nodes of the geometric graphics set are used to store the encapsulated parametric curved tube model, which is generated by creating a tube section curve and then stretching the standard length along the axis direction. At the same time, the geometric centers of the sections at both ends of the tube are defined in point form;

[0054] The leaf node of the pipe end interface geometry set is used to define the geometric center axis system of the pipe end face to control the direction of the pipe; each axis system defines the coordinate origin and three vector directions of X, Y, and Z;

[0055] The publishing node is used to publish the geometric center axis system at both ends of the pipe, and is associated with the pipe end interface geometry set node;

[0056] In step 1), the creation of the pipe parametric model structure tree includes the following steps:

[0057] 1.1) Log in to the design platform and make sure the setting parameter values ​​are visible by selecting Preferences;

[0058] 1.2) Enter the surface modeling module or development tool to create a new physical product structure for the pipe;

[0059] 1.3) Insert a "3D shape" node at the top node of the physical product structure of the pipe and name it as the pipe surface geometric feature;

[0060] 1.4) Create a cross-section curve and two points on the tube end, connect the two points into a straight line, and generate a curved tube model by sweeping and stretching the circle along the straight line;

[0061] 1.5) Use the formula editor to add parameters such as name, diameter, and diameter, associate length parameters with characteristic dimensions of the curved tube, and automatically generate parameter sets and relationship leaf nodes;

[0062] 1.6) Right-click the tube surface geometry feature node and create a tube end interface geometry set leaf node in insert mode, define the axis system at both ends of the surface tube and publish it;

[0063] 1.7) After the structure tree is created, the coordinate planes and auxiliary points, lines, and surface elements used in the modeling process are set to hidden state;

[0064] 1.8) Save all node information; Figure 3 It is a parametric model of water pipes serving oil and water pipelines;

[0065] 2) After creating the tube section curve, stretch the standard length along the axis direction to generate a curved tube model, define relevant parameters and axis system, and establish an association relationship;

[0066] In step 2), the curved tube model adopts the curved surface modeling technology. The model is displayed as a curved surface without thickness to express the maximum external dimensions, that is, the diameter of the round tube is the outer diameter of the tube, and the height and width of the rectangular, elliptical, oval and other special-shaped tube sections correspond to the height and width of the outer wall of the tube; information such as wall thickness and curved surface direction is reflected in the attributes.

[0067] In the curved tube model, the pipes expressed based on the parametric curved tube achieve line contact with the equipment and valve accessories at the connection points.

[0068] In the curved tube model, the tube expressed based on the parametric curved tube can generate the neutral layer tube surface by radially offsetting it by 0.5 times the thickness.

[0069] 3) Define the geometry set and pipe end interface information, and publish the pipe end geometric center axis system;

[0070] Define the geometric center axis system of the pipe end face according to the leaf node of the pipe end interface geometry set in the pipe parametric model to control the direction of the pipe; each axis system defines the coordinate origin and three vector directions of X, Y, and Z;

[0071] According to the published nodes in the pipe parametric model, they are associated with the pipe end interface geometry set nodes to publish the geometric center axis system at both ends of the pipe;

[0072] 4) Create a pipe design table and hang it under the leaf node of the pipe parametric structure tree;

[0073] 5) Add material information to the pipe parametric model structure tree, establish the association between the parametric model and the design table, and achieve one-to-one correspondence between the relevant parameters in the design table and the model parameter set attributes through attribute management;

[0074] 6) Generate surface standard parts based on the pipe parametric model analysis, store them in the warehouse and save them in the corresponding structure tree.

[0075] By associating with the design table or driving with specific parameter values, standard parts of curved pipes are generated based on the pipe parametric model analysis.

[0076] Based on the above method, an example operation steps are as follows:

[0077] Based on the Enovia and CATIA modules of the 3D EXPERIENCE platform, a parametric model of rectangular air pipes serving ventilation ducts is constructed. The specific process is as follows:

[0078] 1) Log in to the platform, check the product license: TXO-Customization and Specialization, Administrator, enter the "Default" collaboration area as an administrator, and prepare the attribute extension list;

[0079] 2) Enter the Enovia interface through the north quadrant of the compass, click "Data Model Specialization Package List", enter the details list and create a new package;

[0080] 3) Check "VPMReference" in the type list and create the "HVACRigidDuct" duct type;

[0081] 4) Expand the list of duct properties, create new properties such as "standard" and "material name", and edit specific properties;

[0082] 5) Check "VPMInstance" in the type list, create a new "HVACRigidDuctins" type, and associate the extended type "HVACRigidDuct" with "HVACRigidDuctins";

[0083] 6) Create Chinese content corresponding to "HVACRigidDuctins" to localize the attribute values, and exit Enovia;

[0084] 7) Enter the design interface through the east quadrant of the compass, enter the "Gen.Wireframe&Surface" mode, and create a parametric model of the pipe, involving structure tree construction and curved pipe modeling; Figure 4 ;

[0085] 8) Add all parameters and associate them with the characteristic dimensions of the curved tube, define the tube end axis system and publish it, and the administrator exits the platform;

[0086] 9) The library creator logs in to the platform, creates a pipe design table and hangs it under the structure tree relationship node;

[0087] 10) Add material information in the structure tree, establish the association between the parametric model and the design table, and achieve one-to-one correspondence between the relevant parameters and attributes in the design table through attribute management;

[0088] 11) Analyze the pipe standard parts and save them in the corresponding structure tree, such as Figure 5As shown in the figure, by comparing the data volume of parameterized rectangular air ducts with the system's own pipes, it is found that the percentage of single data volume reduction is 39.8%.

[0089] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A parametric surface pipe library building method for ship pipe system design, characterized in that: The following steps are involved: 1) Create a pipe parametric model structure tree, describe the pipe surface geometry features, and build a curved pipe in combination with a custom module or development tool; the details are as follows: Determine the section type of the ship pipeline, and create a pipe parametric structure tree according to the section type; the section types include circular, rectangular, elliptical and oval; The pipe parameterized model structure tree is used to store pipe surface geometric features, including pipe surface geometric feature nodes and publishing nodes; The pipe surface geometry feature node includes the following leaf nodes: part geometry, parameter set, relationship, geometry set, pipe end interface geometry set; The part geometry leaf node is used to create a geometric model; The parameter set leaf node is used to define the attribute information including the name, description, standard, material, diameter, specification size, and line density of the pipe surface; The relationship leaf node is used to implement parameter definition in combination with a formula or equation, and to add a design table according to the parameters, so as to associate the data in the design table with the parametric curved surface tube model; The leaf nodes of the geometric graphics set are used to store the encapsulated parameterized curved surface tube model, which is generated by creating a tube section curve and then stretching the standard length along the axis direction; at the same time, the geometric centers of the sections at both ends of the tube are defined in point form; The leaf node of the pipe end interface geometry set is used to define the geometric center axis system of the pipe end face to control the direction of the pipe; each axis system defines the coordinate origin and three vector directions of X, Y, and Z; The publishing node is used to publish the geometric center axis system at both ends of the pipe, and is associated with the pipe end interface geometry set node; 2) After creating the tube section curve, stretch the standard length along the axis direction to generate a curved tube model, define relevant parameters and axis system, and establish an association relationship; 3) Define the geometry set and pipe end interface information, and publish the pipe end geometric center axis system; Define the geometric center axis system of the pipe end face according to the leaf node of the pipe end interface geometry set in the pipe parametric model to control the direction of the pipe; each axis system defines the coordinate origin and three vector directions of X, Y, and Z; According to the published nodes in the pipe parametric model, they are associated with the pipe end interface geometry set nodes to publish the geometric center axis system at both ends of the pipe. 4) Create a pipe design table and hang it under the leaf node of the pipe parametric structure tree; 5) Add material information to the pipe parametric model structure tree, establish the association between the parametric model and the design table, and achieve one-to-one correspondence between the relevant parameters in the design table and the model parameter set attributes through attribute management; 6) Generate surface standard parts based on the pipe parametric model analysis, store them in the warehouse and save them in the corresponding structure tree.

2. The parameterized surface pipe library building method for ship pipe system design according to claim 1 is characterized in that: In the step 1), the creation of the pipe parameterized model structure tree includes the following steps: 1.1) Log in to the design platform and make sure the setting parameter values ​​are visible by selecting Preferences; 1.2) Enter the surface modeling module or development tool to create a new physical product structure for the pipe; 1.3) Insert a "3D Shape" node at the top node of the physical product structure of the pipe and name it as the pipe surface geometry feature; 1.4) Create a cross-section curve and two points on the tube end, connect the two points into a straight line, and generate a curved tube model by sweeping and stretching the circle along the straight line; 1.5) Use the formula editor to add parameters such as name, diameter, and diameter, associate length parameters with characteristic dimensions of the curved tube, and automatically generate parameter sets and relationship leaf nodes; 1.6) Right-click the tube surface geometry feature node and create a tube end interface geometry set leaf node in insert mode, define the axis system at both ends of the surface tube and publish it; 1.7) After the structure tree is created, the coordinate planes and auxiliary points, lines, and surface elements used in the modeling process are set to hidden state; 1.8) Save all node information.

3. The parameterized surface pipe library building method for ship pipe system design according to claim 1 is characterized in that: In the step 2), the curved tube model adopts the curved surface modeling technology, and the model is displayed as a curved surface without thickness to express the maximum external dimensions, that is, the diameter of the round tube is the outer diameter of the tube, and the height and width of the rectangular, elliptical, oval and other special-shaped tube sections correspond to the height and width of the outer wall of the tube; the wall thickness and curved surface direction information are reflected in the attributes.

4. The parameterized surface pipe library building method for ship pipe system design according to claim 3 is characterized in that: In the step 2), in the curved tube model, the pipe material expressed based on the parameterized curved tube achieves line contact with the equipment and valve accessories at the connection.

5. The parameterized surface pipe library building method for ship pipe system design according to claim 3 is characterized in that: In the step 2), in the curved tube model, the tube material expressed based on the parameterized curved tube is radially offset by 0.5 times the thickness to generate the neutral layer tube surface.

6. The parameterized surface pipe library building method for ship pipe system design according to claim 1 is characterized in that: In the step 6), the curved pipe standard part is generated based on the pipe parameterized model analysis by associating with the design table or driving with specific parameter values.

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