CN114547779A - Three-dimensional parametric modeling method based on two-dimensional middle section of middle cargo hold - Google Patents
Three-dimensional parametric modeling method based on two-dimensional middle section of middle cargo hold Download PDFInfo
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Abstract
The invention provides a three-dimensional parametric modeling method based on a two-dimensional middle section of a middle cargo hold, which comprises the following steps: s1, acquiring parameters of the middle cargo hold according to the middle sectional view of the middle cargo hold; s2, arranging the acquired parameters of the middle cargo hold into an external data file which can be read by three-dimensional modeling software; s3, reading the external data file, performing secondary development, and acquiring contour node coordinate information of the middle cargo compartment longitudinal plate and mounting node coordinate information of the middle cargo compartment longitudinal bone; s4, carrying out parametric geometric modeling on the longitudinal plates of the middle cargo compartment and the longitudinal bones of the middle cargo compartment to obtain two-dimensional geometric models of the longitudinal plates of the middle cargo compartment and the longitudinal bones of the middle cargo compartment; s5, longitudinally stretching the two-dimensional geometric models of the longitudinal plates and the longitudinal bones of the middle cargo compartment uniformly to obtain a three-dimensional model of the middle cargo compartment; the method uses the three-dimensional modeling platform secondary development technology to rapidly generate the three-dimensional model of the middle cargo hold, provides a foundation for rapid conversion of the finite element model of the middle cargo hold, and greatly shortens the construction time and the construction difficulty of the finite element model of the middle cargo hold.
Description
Technical Field
The invention belongs to the technical field of container ship construction, and particularly relates to a three-dimensional parametric modeling method based on a two-dimensional middle section of a middle cargo hold.
Background
In the auditing stage of the design and the check of the ship class agency of the submission of the ultra-large container ship, the typical middle section drawing needs to be audited and identified, and the finite element structural strength of the middle cargo hold needs to be evaluated based on the drawing to determine the size of each part, so that the safety performance of the ship body structure is further improved, and the operation safety and the stable development of the shipping logistics are ensured.
Due to the fact that international maritime organization IMO and IACS and classification society force the requirement of carrying out middle cargo hold section finite element analysis based on a middle section drawing, the rapid modeling of a finite element model is important. At present, the full life cycle design based on a three-dimensional modeling platform is gradually applied to the field of ship design, and the conversion of a CAD-CAE model can be rapidly realized. However, the current CAD geometric model needs to be manually built according to each node of the middle section, which is time-consuming, delays the development and design cycle, and puts more strict requirements on different operators.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a three-dimensional parametric modeling method based on a two-dimensional middle section of a middle cargo hold, which can quickly generate a three-dimensional model of the middle cargo hold, provide a foundation for the quick conversion of a finite element model of the middle cargo hold, greatly shorten the modeling time of the finite element model of the middle cargo hold and reduce the modeling difficulty.
In order to achieve the above objects and other related objects, the present invention provides a three-dimensional parametric modeling method based on a two-dimensional middle section of a middle cargo tank, the method comprising:
s1, acquiring parameters of the middle cargo hold according to the middle sectional view of the middle cargo hold; the middle cargo tank parameters comprise a profile depth D, a profile width B, a hatch coaming height Dh, a double-layer bottom structure height Hdb, a double-shell width Bs, a beam arch-to-midship distance Ba, a beam arch-to-main deck height Ha, a side-bottom girder spacing Bc, a container height Hc, a spacing Bp between a middle bottom girder and a side bottom girder, a total number Rcn of transverse containers, a total number Tcm of vertical containers between a first platform and a third platform, a topside strake longitudinal bone spacing H1, a first main deck longitudinal bone spacing B1, a second main deck longitudinal bone spacing B2, a hatch coaming top plate length Bw1 and a hatch coaming upper folded plate height Bw 2;
s2, arranging the acquired parameters of the middle cargo hold into an external data file which can be read by three-dimensional modeling software;
s3, reading an external data file by using three-dimensional modeling software, and performing secondary development to obtain contour node coordinate information of a middle cargo compartment longitudinal plate and installation node coordinate information of a middle cargo compartment longitudinal bone;
s4, calling a modeling function of the three-dimensional modeling software, carrying out parametric geometric modeling on the longitudinal plates of the middle cargo compartment and the longitudinal bones of the middle cargo compartment to obtain a two-dimensional geometric model of the longitudinal plates of the middle cargo compartment and a two-dimensional geometric model of the longitudinal bones of the middle cargo compartment, and finishing the two-dimensional geometric modeling of the middle cargo compartment;
and S5, longitudinally stretching the two-dimensional geometric model of the longitudinal plate of the middle cargo compartment and the two-dimensional geometric model of the longitudinal bone of the middle cargo compartment uniformly according to the length of the middle cargo compartment to obtain a three-dimensional model of the middle cargo compartment.
Preferably, when the two-dimensional geometric modeling of the middle cargo hold is performed, the two-dimensional geometric modeling of the middle cargo hold is divided into two-dimensional geometric modeling of a double-layer bottom structure and two-dimensional geometric modeling of a side structure; the two-dimensional geometric modeling of the double-layer bottom structure comprises two-dimensional geometric modeling of a double-layer bottom longitudinal plate and two-dimensional geometric modeling of a double-layer bottom longitudinal bone, and the two-dimensional geometric modeling of the broadside structure comprises two-dimensional geometric modeling of the broadside longitudinal plate and two-dimensional geometric modeling of the broadside longitudinal bone; obtaining a two-dimensional geometric model of the longitudinal plates of the middle cargo hold by completing two-dimensional geometric modeling of the double-layer bottom longitudinal plates and the two-dimensional geometric modeling of the side longitudinal plates; obtaining a two-dimensional geometric model of the longitudinal frame of the middle cargo hold by completing two-dimensional geometric modeling of the double-layer bottom longitudinal frame and the two-dimensional geometric modeling of the broadside longitudinal frame; the two-dimensional geometric modeling of the double-layer bottom longitudinal plate is prior to the two-dimensional geometric modeling of the side longitudinal plate, so that the modeling speed is increased.
Preferably, the two-dimensional geometric modeling of the double-layer bottom longitudinal plate comprises two-dimensional geometric modeling of a bottom plate of the ship, two-dimensional geometric modeling of an inner bottom plate and two-dimensional geometric modeling of an inner bottom truss; the two-dimensional geometric modeling of the double-layer bottom longitudinal bone comprises two-dimensional geometric modeling of the ship bottom longitudinal bone, two-dimensional geometric modeling of the inner bottom longitudinal bone and two-dimensional geometric modeling of the inner bottom truss longitudinal bone; the inner bottom girder comprises a middle bottom girder and a plurality of side bottom girders, and the number of the inner bottom girders is determined by the total number Rcn of the transverse containers; the two-dimensional geometric modeling of the side longitudinal plate comprises two-dimensional geometric modeling of a platform, two-dimensional geometric modeling of an outer shell, two-dimensional geometric modeling of an inner shell, two-dimensional geometric modeling of a main deck, two-dimensional geometric modeling of a hatch coaming, two-dimensional geometric modeling of an inner bottom plate and two-dimensional geometric modeling of a bilge, and the two-dimensional geometric modeling of the side longitudinal plate comprises two-dimensional geometric modeling of a platform longitudinal bone, two-dimensional geometric modeling of an outer shell longitudinal bone, two-dimensional geometric modeling of an inner shell longitudinal bone, two-dimensional geometric modeling of a main deck longitudinal bone, two-dimensional geometric modeling of a bilge longitudinal bone and two-dimensional geometric modeling of an inner bottom plate longitudinal bone.
Preferably, the data file is a csv file.
As above, the three-dimensional parametric modeling method based on the two-dimensional middle section of the medium cargo hold has the following beneficial effects:
(1) the parametric geometric modeling of the cross section of the middle cargo hold can be quickly realized, the two-dimensional geometric modeling of the cross section of the middle cargo hold is obtained, and longitudinal stretching is carried out on the basis of the two-dimensional geometric modeling to obtain the three-dimensional model of the middle cargo hold, so that a foundation is provided for the conversion and analysis of a finite element model in the later period, the design period and the design difficulty are greatly shortened, and the popularization and the use are convenient;
(2) according to the arrangement direction of the containers, classification modeling is carried out, so that a parameterization program can be quickly realized, and the modeling efficiency is improved.
Drawings
Figure 1 is a schematic view of a middle section of a cargo hold in a container.
FIG. 2 is a schematic view of a cross section of a center cargo tank with parameters of the center cargo tank marked thereon,
FIG. 3 is a schematic diagram of a two-dimensional geometric model of a center cargo tank.
Fig. 4 is a schematic diagram of a three-dimensional model of a center cargo tank.
Description of the reference numerals
The double-layer bottom structure comprises a double-layer bottom structure 1, a side structure 2 and a container 3.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 4. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
The three-dimensional parametric modeling software can be realized based on any three-dimensional modeling software capable of realizing secondary development, and the embodiment specifically explains the CATIA three-dimensional modeling software as an example.
The invention provides a three-dimensional parametric modeling method based on a two-dimensional middle section of a middle cargo hold, which comprises the following steps:
s1, as shown in the figures 1 to 2, acquiring parameters of the middle cargo hold according to the middle sectional view of the middle cargo hold; the middle cargo tank parameters comprise a profile depth D, a profile width B, a hatch coaming height Dh, a double-layer bottom structure height Hdb, a double-shell width Bs, a beam arch-to-midship distance Ba, a beam arch-to-main deck height Ha, a side-bottom girder spacing Bc, a container height Hc, a spacing Bp between a middle bottom girder and a side bottom girder, a total number Rcn of transverse containers, a total number Tcm of vertical containers between a first platform and a third platform, a topside strake longitudinal bone spacing H1, a first main deck longitudinal bone spacing B1, a second main deck longitudinal bone spacing B2, a hatch coaming top plate length Bw1 and a hatch coaming upper folded plate height Bw 2; wherein the width of the container is equal to the spacing Bc between the side bottom girders;
s2, arranging the acquired parameters of the middle cargo hold into an external data file which can be read by CATIA software;
specifically, the data file is an external data file that can be identified by modeling software such as CATIA, such as an Excel file, a csv file, an xml file, or a txt file, and the like, which is not limited to this, and the csv file is preferably selected in this embodiment.
It is understood that the middle cargo space parameters can be organized into data files by means of manual processing or software processing, which is not limited to the above.
S3, reading an external data file by using CATIA software, and programming through secondary development to obtain contour node coordinate information of a longitudinal plate of the middle cargo compartment and installation node coordinate information of a longitudinal bone of the middle cargo compartment;
it is understood that the middle cargo hold longitudinal plates comprise a bottom plate, an inner bottom truss, an outer shell, an inner shell, a first platform, a second platform, a third platform, a main deck, a hatch coaming, an inner bottom plate and a bilge; the middle cargo hold longitudinal frame comprises a ship bottom longitudinal frame, an inner bottom truss longitudinal frame, a platform longitudinal frame, a main deck longitudinal frame, an inner bottom side plate longitudinal frame and a bilge longitudinal frame.
Specifically, as shown in the subject 2 and fig. 3, firstly, the coordinate information of the contour node A, C of the bottom board, the coordinate information of the contour nodes a ' and C ' of the double bottom boards and the number of the inner bottom girders are determined by the double-layer bottom structure height Hdb, the side-bottom girder interval Bc, the interval Bp between the middle bottom girders and the side bottom girders and the total number Rcn of the transverse containers, and further the coordinate information of the contour node B ' of each inner bottom girder on the inner bottom board and the coordinate information of the contour node B on the bottom board are determined; then, trisecting the distance between two adjacent contour nodes on the inner bottom plate to obtain the coordinate information of the installation nodes of the longitudinal frame of the inner bottom plate, and trisecting the distance between two adjacent contour nodes on the bottom plate to obtain the coordinate of the installation nodes of the longitudinal frame of the bottom plate; trisecting the distance between two contour nodes on each inner bottom truss to obtain the coordinates of the installation nodes of the longitudinal bones of the inner bottom trusses;
secondly, determining coordinate information of three contour nodes D, D 'and D' on the first platform through coordinate information of a container height Hc, a double-layer bottom structure height Hdb, a profile width B, a double-shell width Bs and a contour node C, and then trisecting the distance between two adjacent contour nodes on the first platform to obtain the coordinates of the installation nodes of the longitudinal frame of the first platform; determining coordinate information of two contour nodes E, E ' on the second platform and coordinate information of two contour nodes F, F ' on the third platform through coordinate information of a contour node D, coordinate information of a contour node D ', the height Hc of a container and the total number Tcm of vertical containers between the first platform and the third platform of each platform, trisecting the distance between the two contour nodes on the second platform to obtain the coordinates of mounting nodes of a second platform longitudinal bone, trisecting the distance between the two contour nodes on the third platform to obtain the coordinates of the mounting nodes of the third platform longitudinal bone; determining coordinate information of a contour node G through the profile depth D and the profile width B, and determining coordinate information of a virtual node G' according to the coordinate information of the contour node G, the profile width B, the distance Ba between a beam arch and a midship and the height Ha between the beam arch and a main deck; determining the coordinate information of the contour node G 'according to the coordinate information of the contour node G, the coordinate information of the virtual node G', the coordinate information of the contour node D 'and the coordinate information of the contour node F'; dividing the distance between two contour nodes G, G' according to a first main deck longitudinal bone interval B1 and a second main deck longitudinal bone interval B2 to obtain the installation node coordinate information of the main deck longitudinal bone; mounting node coordinate information of the outer shell longitudinal bone is obtained by dividing between two contour nodes D, G according to the shipboard strake longitudinal bone distance H1 (namely Hc/2) and the outer plate longitudinal bone distance (namely Hc/3), and mounting node coordinate information of the inner shell longitudinal bone is obtained by dividing between two contour nodes D 'and G' according to the shipboard strake longitudinal bone distance H1 and the outer plate longitudinal bone distance;
secondly, obtaining coordinate information of a contour node P1 according to the height Dh of the hatch coaming and the coordinate information of a contour node D ', and then obtaining coordinate information of contour nodes P2 and P3 according to the length Bw1 of the top plate of the hatch coaming, the height Bw2 of the upper folded plate of the hatch coaming, and the coordinate information of contour nodes D ' and G ';
finally, according to the maximum arrangement number of the transverse containers, the distance between the contour nodes C, D is equally divided, and the coordinate information of the installation nodes of the bilge longitudinal bones is obtained; and equally dividing the distance between the contour nodes C 'and D' to obtain the coordinate information of the installation node of the inner side plate longitudinal bone.
S4, calling a modeling function of the CATIA through CAA +, and carrying out parametric geometric modeling on the longitudinal plate of the middle cargo compartment and the longitudinal bone of the middle cargo compartment to obtain a two-dimensional geometric model of the longitudinal plate of the middle cargo compartment and a two-dimensional geometric model of the longitudinal bone of the middle cargo compartment so as to complete the two-dimensional geometric modeling of the middle cargo compartment;
when the two-dimensional geometric modeling of the middle cargo hold is carried out, the two-dimensional geometric modeling of the middle cargo hold is divided into two-dimensional geometric modeling of a double-layer bottom structure and two-dimensional geometric modeling of a side structure; the two-dimensional geometric modeling of the double-layer bottom structure comprises two-dimensional geometric modeling of a double-layer bottom longitudinal plate and two-dimensional geometric modeling of a double-layer bottom longitudinal bone, and the two-dimensional geometric modeling of the broadside structure comprises two-dimensional geometric modeling of the broadside longitudinal plate and two-dimensional geometric modeling of the broadside longitudinal bone; obtaining a two-dimensional geometric model of the longitudinal plates of the middle cargo hold by completing two-dimensional geometric modeling of the double-layer bottom longitudinal plates and the two-dimensional geometric modeling of the side longitudinal plates; the two-dimensional geometric model of the longitudinal frame of the middle cargo hold can be obtained by completing the two-dimensional geometric modeling of the double-layer bottom longitudinal frame and the two-dimensional geometric modeling of the side longitudinal frame;
in order to facilitate the quick realization of a program algorithm, the specific operation steps of the two-dimensional geometric modeling of the medium cargo hold are as follows:
(1) dividing outline nodes of longitudinal plates of the medium cargo hold into type I outline nodes (namely nodes in the transverse arrangement direction of the containers) and type II outline nodes (namely nodes in the vertical arrangement direction of the containers) according to the arrangement direction of the containers, wherein the type I outline nodes are outline nodes of a double-layer bottom structure, and the type II outline nodes are outline nodes of a broadside structure; the profile nodes of the double-bottom structure include profile nodes A, A ', B, B ', C, C ', and the profile nodes of the broadside structure include profile nodes D, D ', D ", E, E ', F, F ', G, G ', P1, P2, P3;
specifically, a coordinate system YZ axis is established with a as a coordinate center, the Y-direction coordinate of the contour node A, A 'is 0, the Z-direction coordinate of the contour node A, B, C is 0, and the Z-direction coordinates of the contour nodes a', B ', and C' are Hdb; the Y-coordinate determination procedure for the contour nodes B, B ', C, C' in the double-bottom structure is as follows:
Do j＝1，Rcn-1；
Y：Bp+(j-1)*Bc；
End do
the Y-direction coordinate of the contour node D, E, F, G in the broadside structure is the profile width B, the Y-direction coordinates of the contour nodes D ', E ', F ', G ', P1 are B-Bs, the Y-direction coordinate of the contour node D "is Bp + (Rcn-2) × Bc, and the vertical coordinates of the contour nodes D, D ' and D" in the broadside structure are: hdb + Hc; the vertical coordinates of the profile node F, F' are: hdb + (Tcm +1) × Hc; the vertical coordinates of profile node E, E' are: hdb + (Tcm/2+1) × Hc; and if the vertical coordinate of the contour node G is D, the vertical coordinate of the contour node G' is as follows: d + Bs Ha/(B-Ba); the vertical coordinates of the contour nodes P1 and P2 are: dh, the Y-coordinate of the contour node P1: bp + (Rcn-2) × Bc, the Y-directional coordinates of the profile nodes P2, P3 are: bp + (Rcn-2) × Bc + Bw 1; the Y-coordinate of the contour node P3 is: Dh-Bw 2;
and determining the contour nodes of all the longitudinal plates, and then determining the installation node position of each longitudinal bone.
(2) Connecting the contour nodes A, C to obtain a two-dimensional geometric model of the bottom plate AC, and connecting the contour nodes A 'and C' to obtain a two-dimensional geometric model of the inner bottom plate A 'C'; connecting the contour nodes A, A 'to obtain a two-dimensional geometric model of the middle bottom truss AA', connecting the contour nodes C, C 'to obtain a two-dimensional geometric model of the outermost side bottom truss CC', and connecting the contour nodes B and the corresponding contour nodes B 'to obtain two-dimensional geometric models of the rest side bottom trusses BB', thereby finally obtaining a two-dimensional geometric model of each longitudinal plate on the double-layer bottom structure (namely the two-dimensional geometric model of the double-layer bottom longitudinal plate); then, endowing bone materials on the mounting nodes of the inner bottom plate, the bottom plate of the ship and the inner bottom truss to obtain a two-dimensional geometric model of each longitudinal bone on the double-layer bottom structure (namely the two-dimensional geometric model of the double-layer bottom longitudinal bone); thus, a two-dimensional geometric model of the whole double-layer bottom structure is obtained;
(3) connecting the contour node D, D 'with the contour nodes D' and D 'to obtain a two-dimensional geometric model of the first platform DD', and then endowing bone materials on the installation nodes of the first platform to obtain a two-dimensional geometric model of the longitudinal bone of the first platform; connecting the contour node E, E ' to obtain a two-dimensional geometric model of a second platform EE ', connecting the contour node F, F ' to obtain a two-dimensional geometric model of a third platform, and then endowing bone materials on the mounting nodes of the second platform and the third platform to obtain two-dimensional geometric models of a second longitudinal bone and a third longitudinal bone; connecting the contour nodes D, G to obtain a two-dimensional geometric model of the outer shell, connecting the contour nodes D 'and G' to obtain a two-dimensional geometric model of the inner shell, and then endowing the mounting nodes of the inner shell and the outer shell with bone materials to obtain two-dimensional geometric models of longitudinal bones of the inner shell and the outer shell; connecting the contour nodes G, G' to obtain a two-dimensional geometric model of the main deck, and endowing bone materials on the installation nodes of the main deck to obtain a two-dimensional geometric model of the longitudinal bone of the main deck; connecting contour nodes G', P1, connecting contour nodes P1 and P2, and connecting contour nodes P2 and P3 to obtain a two-dimensional geometric model of the hatch coaming; connecting the contour node D, C by a spline curve to obtain a two-dimensional geometric model of the bilge, and endowing bone materials on the installation node of the bilge to obtain a two-dimensional geometric model of the longitudinal bone of the bilge; connecting the contour nodes C 'and D' to obtain a two-dimensional geometric model of the inner bottom edge plate, endowing aggregate on the mounting nodes on the inner bottom edge plate, and obtaining a two-dimensional geometric model of the longitudinal bone of the inner bottom edge plate; up to this point, a two-dimensional geometric model of the entire broadside structure (including a two-dimensional geometric model of the broadside longitudinal plate and a two-dimensional geometric model of the broadside longitudinal bone) is obtained. And finishing the two-dimensional geometric modeling of the middle cargo hold.
And S5, as shown in the figures 3 and 4, longitudinally stretching the two-dimensional geometric model of the longitudinal plate of the middle cargo tank (namely, the two-dimensional geometric model of the double-layer bottom longitudinal plate and the two-dimensional geometric model of the side longitudinal plate) and the two-dimensional geometric model of the longitudinal frame of the middle cargo tank (namely, the two-dimensional geometric model of the double-layer bottom longitudinal frame and the two-dimensional geometric model of the side longitudinal frame) uniformly according to the length of the middle cargo tank to obtain the three-dimensional model of the middle cargo tank.
And finally, converting the three-dimensional model of the middle cargo hold into a three-dimensional finite element model of the middle cargo hold by utilizing the CAD-CAE conversion function of the CATIA.
In conclusion, the node coordinates of the middle cargo hold are automatically generated through the secondary development technology, the parameterized modeling technology is utilized to quickly construct the three-dimensional model of the middle cargo hold, a foundation is provided for the conversion and analysis of the finite element model in the later period, the design period and the design difficulty are greatly shortened, the self-adaptive construction of the finite element models of the middle cargo holds of containers with different sizes is effectively met, and the method is convenient to popularize and use.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (4)
1. A three-dimensional parametric modeling method based on a two-dimensional middle section of a middle cargo hold is characterized by comprising the following steps:
s1, acquiring parameters of the middle cargo hold according to the middle sectional view of the middle cargo hold; the middle cargo tank parameters comprise a profile depth D, a profile width B, a hatch coaming height Dh, a double-layer bottom structure height Hdb, a double-shell width Bs, a beam arch-to-midship distance Ba, a beam arch-to-main deck height Ha, a side-bottom girder spacing Bc, a container height Hc, a spacing Bp between a middle bottom girder and a side bottom girder, a total number Rcn of transverse containers, a total number Tcm of vertical containers between a first platform and a third platform, a topside strake longitudinal bone spacing H1, a first main deck longitudinal bone spacing B1, a second main deck longitudinal bone spacing B2, a hatch coaming top plate length Bw1 and a hatch coaming upper folded plate height Bw 2;
s2, arranging the acquired parameters of the middle cargo hold into an external data file which can be read by three-dimensional modeling software;
s3, reading an external data file by using three-dimensional modeling software, carrying out secondary development, and acquiring outline node coordinate information of a longitudinal plate of the middle cargo compartment and installation node coordinate information of a longitudinal bone of the middle cargo compartment;
s4, calling a modeling function of three-dimensional modeling software, and carrying out parametric geometric modeling on the longitudinal plates of the middle cargo compartment and the longitudinal bones of the middle cargo compartment to obtain a two-dimensional geometric model of the longitudinal plates of the middle cargo compartment and a two-dimensional geometric model of the longitudinal bones of the middle cargo compartment so as to complete the two-dimensional geometric modeling of the middle cargo compartment;
and S5, longitudinally stretching the two-dimensional geometric model of the longitudinal plate of the middle cargo compartment and the two-dimensional geometric model of the longitudinal bone of the middle cargo compartment uniformly according to the length of the middle cargo compartment to obtain a three-dimensional model of the middle cargo compartment.
2. The three-dimensional parametric modeling method based on the two-dimensional middle section of the middle cargo tank is characterized in that when the two-dimensional geometric modeling of the middle cargo tank is carried out, the two-dimensional geometric modeling of the middle cargo tank is divided into two-dimensional geometric modeling of a double-layer bottom structure and two-dimensional geometric modeling of a side structure; the two-dimensional geometric modeling of the double-layer bottom structure comprises two-dimensional geometric modeling of a double-layer bottom longitudinal plate and two-dimensional geometric modeling of a double-layer bottom longitudinal bone, and the two-dimensional geometric modeling of the broadside structure comprises two-dimensional geometric modeling of the broadside longitudinal plate and two-dimensional geometric modeling of the broadside longitudinal bone; obtaining a two-dimensional geometric model of the longitudinal plates of the middle cargo hold by completing two-dimensional geometric modeling of the double-layer bottom longitudinal plates and the two-dimensional geometric modeling of the side longitudinal plates; obtaining a two-dimensional geometric model of the longitudinal frame of the middle cargo hold by completing two-dimensional geometric modeling of the double-layer bottom longitudinal frame and the two-dimensional geometric modeling of the broadside longitudinal frame; and the two-dimensional geometric modeling of the double-layer bottom longitudinal plate is prior to the two-dimensional geometric modeling of the side longitudinal plate.
3. The three-dimensional parametric modeling method based on the two-dimensional middle section of the middle cargo tank is characterized in that the two-dimensional geometric modeling of the double-layer bottom longitudinal plate comprises two-dimensional geometric modeling of a bottom plate of the ship, two-dimensional geometric modeling of an inner bottom plate and two-dimensional geometric modeling of an inner bottom truss; the two-dimensional geometric modeling of the double-layer bottom longitudinal bone comprises two-dimensional geometric modeling of the ship bottom longitudinal bone, two-dimensional geometric modeling of the inner bottom longitudinal bone and two-dimensional geometric modeling of the inner bottom truss longitudinal bone; the inner bottom girder comprises a middle bottom girder and a plurality of side bottom girders, and the number of the inner bottom girders is determined by the total number Rcn of the transverse containers; the two-dimensional geometric modeling of the side longitudinal plate comprises two-dimensional geometric modeling of a platform, two-dimensional geometric modeling of an outer shell, two-dimensional geometric modeling of an inner shell, two-dimensional geometric modeling of a main deck, two-dimensional geometric modeling of a hatch coaming, two-dimensional geometric modeling of an inner bottom plate and two-dimensional geometric modeling of a bilge, and the two-dimensional geometric modeling of the side longitudinal plate comprises two-dimensional geometric modeling of a platform longitudinal bone, two-dimensional geometric modeling of an outer shell longitudinal bone, two-dimensional geometric modeling of an inner shell longitudinal bone, two-dimensional geometric modeling of a main deck longitudinal bone, two-dimensional geometric modeling of a bilge longitudinal bone and two-dimensional geometric modeling of an inner bottom plate longitudinal bone.
4. The three-dimensional parametric modeling method based on the two-dimensional middle section of the middle cargo tank is characterized in that the data file is a csv file.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115123481A (en) * | 2022-08-22 | 2022-09-30 | 江南造船(集团)有限责任公司 | Cargo hold collaborative arrangement method and ship |
| CN116756856A (en) * | 2023-08-15 | 2023-09-15 | 中国船舶集团有限公司第七一九研究所 | CAA-based cabin passing piece open-pore framework model automatic generation method and system |
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2022
- 2022-03-02 CN CN202210199827.4A patent/CN114547779A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115123481A (en) * | 2022-08-22 | 2022-09-30 | 江南造船(集团)有限责任公司 | Cargo hold collaborative arrangement method and ship |
| CN116756856A (en) * | 2023-08-15 | 2023-09-15 | 中国船舶集团有限公司第七一九研究所 | CAA-based cabin passing piece open-pore framework model automatic generation method and system |
| CN116756856B (en) * | 2023-08-15 | 2023-11-03 | 中国船舶集团有限公司第七一九研究所 | CAA-based cabin passing piece open-pore framework model automatic generation method and system |
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