CN115042934B - Complicated upper building line fairing method - Google Patents
Complicated upper building line fairing method Download PDFInfo
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- CN115042934B CN115042934B CN202210709885.7A CN202210709885A CN115042934B CN 115042934 B CN115042934 B CN 115042934B CN 202210709885 A CN202210709885 A CN 202210709885A CN 115042934 B CN115042934 B CN 115042934B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000009499 grossing Methods 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims description 14
- 238000013459 approach Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 238000013461 design Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000739 chaotic effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B71/00—Designing vessels; Predicting their performance
- B63B71/10—Designing vessels; Predicting their performance using computer simulation, e.g. finite element method [FEM] or computational fluid dynamics [CFD]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/15—Vehicle, aircraft or watercraft design
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Abstract
The invention relates to the technical field of hull lofting, and discloses a complex upper building line fairing method, which comprises the following steps of S1, separating an upper building from a main hull; s2, making a complete upper building line according to the separated upper building line, and smoothing the upper building line; and S3, dividing the upper building line into a plurality of sub-type lines, and respectively smoothing the plurality of sub-type lines to obtain a line library corresponding to each sub-type line. The invention firstly separates the upper building line from the main hull, makes a complete upper building line, then divides the complex part of the upper building line to form a plurality of sub-lines, respectively smoothes each sub-line, avoids the problem that three-way smoothes can not pass, and respectively names each sub-line as different line libraries, thereby avoiding the problem that modeling can not be performed due to the phenomenon that the lines are disordered in a modeling system, ensuring subsequent modeling work and improving working efficiency.
Description
Technical Field
The invention relates to the technical field of hull lofting, in particular to a complex upper building line fairing method.
Background
Hull line fairing is the first link in hull lofting. At present, line smoothing is carried out on a Hudong shipbuilding design software (Ship Product Design, SPD) building system, and then a line library is imported into the design system for three-dimensional modeling. Because of the limitation of software, the processing of the complicated upper modeling line is difficult, the phenomenon that the upper modeling line cannot pass through is often generated in the three-way fairing process, and the phenomenon that the modeling line is disordered is also easy to generate in the modeling system, so that the modeling cannot be performed.
Disclosure of Invention
In view of the above problems, the present invention aims to provide a complex upper modeling line fairing method, so as to solve the problem that in the prior art, when complex upper modeling lines are processed, a phenomenon that the complex upper modeling line fairing cannot pass through occurs frequently in a three-way fairing process, and a phenomenon that the modeling lines are disordered easily occurs in a modeling system, so that modeling cannot be performed.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention relates to a complicated upper building line fairing method, which comprises the following steps:
s1, separating an upper building from a main hull;
s2, making a complete upper building line according to the separated upper building line, and smoothing the upper building line;
and S3, dividing the upper building line into a plurality of sub-type lines, and respectively smoothing the plurality of sub-type lines to obtain a line library corresponding to each sub-type line.
Preferably, in the step S3, the side wall of the driving deck is divided into an upper portion and a lower portion, the widest position of each rib line is connected to form a smooth curve in the area where the closed curve appears, and the line is used as a dividing line to obtain two molded line libraries corresponding to the side wall of the driving deck.
Preferably, the waterline and longitudinal section lines are encrypted in the vicinity of the dividing line of the side walls of the drive deck.
Preferably, in the step S3, a tangent line of the arc of the upper opening of the cap peak is connected to form a smooth line as a parting line, and the corresponding line library of the cap peak position is obtained according to the parting line of the upper opening of the cap peak.
Preferably, in the step S3, the compass deck is divided into a compass deck plate, a compass deck side wall, a brim hat lower plate, a cap brim and an inner sealing plate, and the sub-lines corresponding to the compass deck plate, the compass deck side wall, the brim hat lower plate, the cap brim and the inner sealing plate are smoothed.
Preferably, the side wall of the compass deck extends out of the hat brim by a set distance to obtain a molded line library corresponding to the side wall of the compass deck; and extending the compass deck plate to extend out of the hat brim by a set distance to obtain a molded line library corresponding to the compass deck plate.
Preferably, in step S3, at a middle position of a top waterline of the chimney, dividing the waterline of the chimney part into a head waterline and a tail waterline, and after the head waterline and the tail waterline are respectively straightened, obtaining a molded line library corresponding to the head waterline and the tail waterline respectively.
Preferably, after the step S1 and before the step S2, the method further includes making a main hull profile according to the separated main hull, and smoothing the main hull profile;
in the step S2, the upper building line and the main hull line have overlapping portions.
Preferably, in the step S2, a longitudinal section line intersecting three intersecting points with the side wall of the driving deck is divided into an upper section and a lower section, the upper section longitudinal section line is a closed section, the lower section longitudinal section line is a non-closed section, when the closed section is straightened, the intersecting point of the closed section and the non-closed section is deleted, and when the non-closed section is straightened, the intersecting point of the non-closed section and the closed section is deleted.
Preferably, in step S2, the waterline corresponding to the cap peak on the upper side of the compass deck is divided into two sections, one section is the side waterline, the other section is the near middle waterline, and the intersection point of the side waterline and the near middle waterline is deleted.
Compared with the prior art, the complex upper-building line fairing method provided by the embodiment of the invention has the beneficial effects that:
according to the complex upper modeling line fairing method, the upper modeling line is separated from the main hull, a complete upper modeling line is made, then the complex part of the upper modeling line is divided to form a plurality of sub-lines, each sub-line is respectively straightened, the problem that three-way fairing cannot pass through is avoided, each sub-line is respectively named as a different line library, the problem that modeling cannot be achieved due to the fact that the lines are disordered in a modeling system is avoided, follow-up modeling work is guaranteed, and working efficiency is improved.
Drawings
FIG. 1 is a schematic flow chart of a complex upper modeling line fairing method according to an embodiment of the invention;
FIG. 2 is a schematic cross-sectional view of an upper build in an embodiment of the invention;
FIG. 3 is a schematic illustration of 6600 cut lines, 17050 waterline, and 17051 waterline in an embodiment of the present invention;
FIG. 4 is a schematic illustration of the parting line in an embodiment of the invention;
FIG. 5 is a schematic longitudinal cross-sectional view of a chimney portion in an embodiment of the invention;
FIG. 6 is a schematic cross-sectional view of the chimney portion of FIG. 5;
FIG. 7 is a water plane schematic view of the chimney portion of FIG. 5;
FIG. 8 is a schematic view of an overall longitudinal section of an upper building line in accordance with an embodiment of the present invention;
FIG. 9 is a schematic overall cross-sectional view of the upper build line of FIG. 8;
FIG. 10 is a schematic view of the overall water plane of the upper building line of FIG. 8;
in the figure, 1, a compass deck plate surface; 2. hat brim; 3. the side wall of the compass deck; 4. a drive deck; 5. a drive deck side wall; 6. an inner sealing plate; 7. a lower plate of the hat; 8. a dividing line; 9. encrypting the waterline; 10. diagonal cutting.
Detailed Description
In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the term "superstructure" is used in the present invention to refer to a marine superstructure. The complex building in the invention comprises a living deck, a driving deck, a compass deck, a cornice, a chimney and the like.
As shown in fig. 1 to 10, a complex upper modeling line fairing method according to an embodiment of the present invention includes:
s1, separating an upper building from a main hull; because the upper building line is too complex, if the fairing connected with the main hull is too chaotic, the three-way fairing cannot pass through at a later time, so that the main hull is separated from the upper building line;
s2, making a complete upper building line according to the separated upper building line, and smoothing the upper building line;
and S3, dividing the upper building line into a plurality of sub-type lines, and respectively smoothing the plurality of sub-type lines to obtain a line library corresponding to each sub-type line.
The invention firstly separates the upper building line from the main hull, makes a complete upper building line, then divides the complex part of the upper building line to form a plurality of sub-lines, respectively smoothes each sub-line, avoids the problem that three-way smoothes can not pass, and respectively names each sub-line as different line libraries, avoids the problem that modeling can not be performed due to the phenomenon that the lines are disordered in a modeling system, ensures the subsequent modeling and lofting work, and improves the working efficiency.
In step S1, the separation position between the upper building and the main hull is the position of the segmentation seam.
After the step S1 and before the step S2, the method further comprises the steps of making a main hull molded line according to the separated main hull and smoothing the main hull molded line; further, in the step S2, the upper building line and the main hull line have overlapping portions, and the distance between the overlapping portions is 1000-2000 mm, so as to ensure the fairing of the lines. It should be noted that if the segmentation is sewn at the location of the crease line, the upper building line and the main hull line need not have overlapping portions.
At the chimney site, the overall fairing can be difficult due to the closed curve of the waterline. Preferably, in step S2, when the upper building line is smoothed, the chimney portion is smoothed alone. In step S2, the upper building is divided into two parts, one part is a chimney part and the other part is a part outside the chimney. Further, when the chimney portion is smoothed, the profile of the chimney portion spans the segmented seam and has an overlap of 1000-2000 mm.
In the step S2, the compass deck and the driving deck are firstly made into an integral molded line fairing, the principle is that the molded line is made as large as possible, and the molded line cannot be made to be round.
Further, a longitudinal section line intersecting three intersection points with the side wall 5 of the driving deck is divided into an upper section and a lower section, the upper section longitudinal section line is a closed section, the lower section longitudinal section line is a non-closed section, when the closed section is straightened, the intersection point of the closed section and the non-closed section is deleted, and when the non-closed section is straightened, the intersection point of the non-closed section and the closed section is deleted. It should be noted that both the closed and the non-closed segments are projections parallel to the midline plane. As shown in fig. 3, the 6600 section line has three intersecting points with the side wall 5 of the driving deck, namely, point a, point B and point C from top to bottom, the longitudinal section line is divided into two sections, one section without sealing is defined as 6600 section line, and the intersecting point with the section line of the sealing section above is deleted when the section line of the non-sealing section is smooth. The closed segment is defined as 6600.1 cut line, and when the cut line of the closed segment is smoothed, the intersection point of the closed segment and the cut line of the non-closed segment below is deleted, and then the 6600.1 cut line forms a closed graph.
Further, in step S2, the waterline corresponding to the position of the cap peak 2 on the upper side of the compass deck is divided into two sections, one section is the approach side waterline, the other end is the near middle waterline, and the intersection point of the approach side waterline and the near middle waterline is deleted. As shown in fig. 2 and 3, at 17050 water line position of cap peak 2 on upper side of compass deck, because cap peak 2 is a relatively long and narrow closed figure, it is difficult to generate closed water line, and water lines can be divided into 17050 water line and 17051 water line, 17050 water line is taken near middle water line, intersection point with side section is deleted, 17051 water line is taken side section water line, and intersection point with near middle section is deleted.
In step S3, after the first half of the entire building is finished, the entire molded line is properly separated, and the principle of separation is to avoid the occurrence of a closed curve. As shown in fig. 4, the driving deck side wall 5 is divided into an upper part and a lower part, the widest positions of the rib lines are connected into a smooth curve in the area where the closed curve appears, and the line is used as a dividing line 8 to obtain two molded line libraries corresponding to the driving deck side wall 5. Further, the waterline and longitudinal section lines are encrypted in the vicinity of the dividing line 8 of the deck side wall 5 to avoid overlapping at the location of the dividing line, further to avoid the appearance of a closed curve due to overlapping, such as the encrypted waterline 9 shown in fig. 4. Further, the spacing of the encryption waterline or section line is maintained in the range of 20mm to 50 mm.
In step S3, the tangent line of the arc of the upper opening of the cap peak 2 is connected into a smooth line as the parting line 8, and the corresponding molded line library of the cap peak 2 is obtained according to the parting line 8 of the upper opening of the cap peak 2.
In step S3, as shown in fig. 4, the compass deck is divided into a compass deck plate 1, a compass deck side wall 3, a cap lower plate 7, a cap peak 2 and an inner sealing plate 6, and the compass deck plate 1, the compass deck side wall 3, the cap peak lower plate 7, the cap peak 2 and the inner sealing plate 6 are named as different names, respectively, and the sub-lines corresponding to the compass deck plate 1, the compass deck side wall 3, the cap peak lower plate 7, the cap peak 2 and the inner sealing plate 6 are smoothed. Further, after the sub-lines corresponding to the compass deck plate 1, the compass deck side wall 3, the lower cap plate 7, the cap peak 2 and the inner sealing plate 6 are smoothed, the sub-lines corresponding to the compass deck plate 1, the compass deck side wall 3, the lower cap plate 7, the cap peak 2 and the inner sealing plate 6 are compared with the integral upper building line, and if the sub-lines corresponding to the compass deck plate 1, the compass deck side wall 3, the cap peak 2 and the inner sealing plate 6 are inconsistent with the integral upper building line, the inconsistent sub-lines are adjusted.
In step S3, as shown in fig. 4, the side wall 3 of the compass deck extends out of the cap peak 2 by a set distance, so as to obtain a molded line library corresponding to the side wall 3 of the compass deck; and extending the compass deck plate 1 to extend out of the hat brim 2 by a set distance to obtain a molded line library corresponding to the compass deck plate 1. The set distance was 20cm. After the side wall 3 of the compass deck and the board surface 1 of the compass deck are respectively and properly extended, an independent molded line library is respectively manufactured, so that intersecting lines of two curved surfaces can be conveniently obtained in a modeling stage.
In step S3, at the middle position of the top waterline of the chimney, the waterline is a closed graph, so that the waterline at the chimney part is divided into a head waterline and a tail waterline, and after the head waterline and the tail waterline are respectively straightened, a molded line library corresponding to the head waterline and the tail waterline is obtained. Wherein the leading waterline and the trailing waterline do not have overlapping portions.
As shown in fig. 7, at the corner positions where the variation of the leading waterline and the trailing waterline is relatively severe, the fairing properties of the leading waterline and the trailing waterline are checked by diagonal lines 10, respectively, and if a non-fairing position occurs at the corner positions, the correction is made. Further, the head waterline and the tail waterline which are well straightened are spliced end to end, whether the splicing position is straightened or not is observed, and if the non-straightened position exists, the non-straightened position is corrected.
After step S3, each profile library is named with a different name and stored for later use. Further, the model libraries with different names are imported into a modeling system to perform three-dimensional modeling work.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (6)
1. A complex upper modeling line fairing method, comprising:
s1, separating an upper building from a main hull;
s2, making a complete upper building line according to the separated upper building line, and smoothing the upper building line;
s3, dividing the upper building line into a plurality of sub-type lines, and respectively smoothing the sub-type lines to obtain a line library corresponding to each sub-type line;
in the step S2, the upper building is divided into two parts, namely a chimney part and a part outside the chimney, wherein when the chimney part is straightened, the molded line of the chimney part spans the sectional joint and has an overlapped part of 1000-2000 mm;
in the step S3, the side wall of the driving deck is divided into an upper part and a lower part, the widest position of each rib line is connected into a smooth curve in the area where a closed curve appears, and the line is used as a dividing line to obtain two molded line libraries corresponding to the side wall of the driving deck; connecting the tangent line of the arc of the upper opening of the cap peak into a smooth line serving as a dividing line, and obtaining a molded line library corresponding to the cap peak part according to the dividing line of the upper opening of the cap peak; dividing a compass deck into a compass deck plate, a compass deck side wall, a cap lower plate, a cap peak and an inner sealing plate, and smoothing sub-type lines corresponding to the compass deck plate, the compass deck side wall, the cap lower plate, the cap peak and the inner sealing plate; and dividing the waterline of the chimney part into a head waterline and a tail waterline at the middle position of a top waterline of the chimney, and respectively smoothing the head waterline and the tail waterline to obtain a molded line library respectively corresponding to the head waterline and the tail waterline.
2. The complex upper modeling line fairing method of claim 1, wherein the waterline and longitudinal section lines are encrypted near the dividing line of the driver deck side wall.
3. The complicated upper modeling line fairing method of claim 1, wherein the side wall of the compass deck extends out of the cap peak by a set distance to obtain a line library corresponding to the side wall of the compass deck; and extending the compass deck plate to extend out of the hat brim by a set distance to obtain a molded line library corresponding to the compass deck plate.
4. The complex upper modeling line fairing method as defined in claim 1, further comprising, after step S1 and before step S2, making a main hull line from the separated main hull and fairing the main hull line;
in the step S2, the upper building line and the main hull line have overlapping portions.
5. The complicated upper modeling line fairing method according to claim 1, wherein in the step S2, a longitudinal line intersecting three intersection points with the side wall of the driving deck is divided into an upper section and a lower section, the upper section longitudinal line is a closed section, the lower section longitudinal line is a non-closed section, when the closed section is straightened, the intersection point of the closed section and the non-closed section is deleted, and when the non-closed section is straightened, the intersection point of the non-closed section and the closed section is deleted.
6. The complicated upper modeling line fairing method of claim 1, wherein in the step S2, the waterline corresponding to the upper cap peak of the compass deck is divided into two sections, one of which is the approach side waterline, the other is the near middle waterline, and the intersection point of the approach side waterline and the near middle waterline is deleted.
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| CN202210709885.7A CN115042934B (en) | 2022-06-21 | 2022-06-21 | Complicated upper building line fairing method |
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| CN202210709885.7A CN115042934B (en) | 2022-06-21 | 2022-06-21 | Complicated upper building line fairing method |
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