CN109367689B - Design method of hull deck surface platform molded line - Google Patents
Design method of hull deck surface platform molded line Download PDFInfo
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- CN109367689B CN109367689B CN201811173048.7A CN201811173048A CN109367689B CN 109367689 B CN109367689 B CN 109367689B CN 201811173048 A CN201811173048 A CN 201811173048A CN 109367689 B CN109367689 B CN 109367689B
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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
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Abstract
The invention relates to the technical field of hull manufacturing, in particular to a design method of hull deck surface platform profiles.
Description
Technical Field
The invention relates to the technical field of hull manufacturing, in particular to a design method of a hull deck surface platform profile.
Background
The smooth surface of the hull deck is realized by lofting smooth operation of the deck profile. The method is characterized in that the deck profile line fairing with the deck ridge arc in the longitudinal direction and the full-circular beam arch in the transverse direction is realized by trimming the deck ridge arc fairing degree, namely modifying the height value of the center line of the deck, and further obtaining the fairing deck ridge arc curve. The deck surface is embedded into a landing platform of the helicopter, so that the form change of the deck surface is caused inevitably, the molded lines of the deck must be modified, the levelness of the landing platform can be ensured on one hand, and the smoothness of the deck surface is ensured on the other hand.
At present, for embedding of a landing platform of a helicopter, a deck profile does not perform corresponding lofting modification work, but reaches a slipway stage, a square frame abutting operation mode is adopted on an assembly site, a deck surface is lifted through a stacking plate and an iron wedge, a plane is temporarily pulled, and the processing method is used for filling the landing platform. The platform manufactured in the way cannot meet the requirement of the landing platform on the flatness, and on the other hand, the requirement of the deck surface smoothness is difficult to meet. Therefore, the deck surface of the ship body needs to be smoothly embedded into a landing platform of the helicopter, effective lofting and modification work needs to be carried out on the deck molded lines, and the situation that the ship owner, ship inspection and quality inspection report and check fail to pass on site, so that major rework passive conditions are avoided, and the increase of the investment of ship body manufacturing is avoided.
And this causes a series of hull manufacturing problems, such as: the flatness requirement does not reach the standard, the deck plate is damaged due to excessive tearing of the stacking plate or the deck plate material becomes brittle due to excessive welding quantity caused by excessive welding feet, and the like, so that the serious rework risk that the inspection report can not pass through the disassembly and remanufacture installation is caused.
Disclosure of Invention
The invention aims to provide a design method of a hull deck surface platform profile, which is beneficial to improving the mounting efficiency of a hull landing platform and reducing the manufacturing cost of a hull.
In order to achieve the aim, the invention provides a design method of a platform profile of a deck surface of a ship body, which comprises the following steps:
a. obtaining a projection line of the opening and the square plate installed on the deck profile line plan, enabling the center of the square plate to be coincident with the center of the opening, and enabling the center line of the square plate to be intersected with the center line of the deck at a point A, B;
b. obtaining each first intersection point of a line segment AB and a rib line of a deck type line cross section diagram on a deck central line, and taking a horizontal line through the first intersection point to cross a longitudinal line to obtain a first end point;
c. making a first tangent line of a deck rib position beam arch line from the first end point to the middle part of the deck to obtain a first tangent point, and connecting the deck rib position beam arch line, the first tangent line and the horizontal line to obtain a deck rib position molded line of a rib position section where the square plate is located;
d. the deck transition areas on two sides of the first end point are divided into a plurality of equal divisions respectively according to the number of the rib lines of the deck transition area, so that a plurality of equal divisions are formed on the longitudinal section line, the equal divisions are mirrored about the deck central line to obtain mirror image points, a second intersection point of the deck central line of the deck transition area and the rib lines is obtained in a transverse plane diagram, and an arch line is made to sequentially connect the corresponding equal divisions, the second intersection point and the mirror image points;
e. and respectively making second tangents of the deck rib position beam arch lines to the middle part of the deck through a plurality of equally divided points to obtain second tangents, and connecting the deck rib position beam arch lines, the second tangents and the arch lines to obtain a deck rib position molded line of a deck transition region.
Optionally, the length of the side of the square plate is 1.5-2 times of the diameter of the opening.
Optionally, in step a, the center of the opening is located at the midpoint of the centerline of the deck.
Optionally, in step b, the step of obtaining a first intersection point on the deck type line cross-sectional diagram includes:
drawing A, B projection of the point on the side view of the deck profile, and connecting A, B points to obtain a projection line segment AB of the square plate on the side view;
and obtaining the distance between each intersection point of the line segment AB and the rib line on the lateral map and the base line, and making a point with the corresponding distance from the base line on the central line of the deck of the transverse map to obtain each first intersection point of the line segment AB and the rib line on the transverse map.
Optionally, in step c, the part of the deck rib position beam arch line between the first tangent point and the deck centerline is deleted.
Optionally, in step d, the part of the arch line between the deck centerline and the proxel is deleted.
Optionally, in step e, the part of the deck rib position beam arch line between the second tangent point and the deck centerline is deleted.
The embodiment of the invention has the following technical effects:
the method adopts a geometric drawing method, is simple and easy to operate, can finish three-dimensional fairing of molded lines, meets the performance requirement of a landing platform of the helicopter, provides a solid guarantee for smoothly assembling a landing grid on a slipway, adopts a method for fairing the molded lines of a deck in a square plate form in advance, changes a passive method for pulling and dragging the landing platform on site, reduces the serious rework risk caused by non-passing acceptance in the later period, improves the manufacturing efficiency of a hull, and reduces the manufacturing cost.
Drawings
FIG. 1 is a plan view of a deck profile in a preferred embodiment of the present invention;
FIG. 2 is a side view of the deck line in a preferred embodiment of the present invention;
FIG. 3 is a cross-sectional view of the deck profile in a preferred embodiment of the present invention;
fig. 4 is a schematic diagram of the method of the preferred embodiment of the present invention with respect to the arch line.
Description of reference numerals:
1. the center line of the deck, 2, the rib line, 3, the horizontal line, 4, the first tangent line, 5, the arch line of the deck rib position beam, 6, the arch line, 7, the second tangent line, 8, the base line, 9 and the longitudinal section line.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Referring to fig. 1 to 4, the present embodiment provides a method for designing a hull deck surface platform profile, including the following steps:
obtaining an installation opening line of the landing lattice on a deck profile line plan, taking 1.5-2 times of the diameter of an opening as an edge length value of the square plate, enabling the center of the square plate to be coincident with the center of the opening and to be located at the midpoint of a deck center line 1, and enabling the square plate to intersect the deck center line 1 at a point A, B;
drawing A, B projection of the point on the side view of the deck profile, and connecting A, B points to obtain a projection line segment AB of the square plate on the side view;
obtaining the distance between each intersection point of a line segment AB and a rib line 2 on the lateral diagram and a base line 8, projecting the distance onto the transverse diagram to obtain each intersection point of the line segment AB with the rib line 2 on a deck central line 1 of the transverse diagram of the square plate, taking the intersection point as a starting point, making a horizontal line 3 intersect with a longitudinal line 9 to obtain a first end point, and obtaining the projection of the square plate on the transverse diagram;
a first tangent 4 of a deck rib position beam arch line 5 is made from a first end point to the middle part of a deck to obtain a first tangent point, so that a tangent point connecting line of the first tangent 4 and the deck rib position beam arch line 5 is formed, the part of the deck rib position beam arch line 5, which is positioned between the tangent point connecting line of the first tangent 4 and a deck central line 1, is deleted, and a deck rib position molded line of a rib position section where a square plate is positioned is formed by connecting the deck rib position beam arch line 5, the first tangent line 4 and a horizontal line 3;
in the embodiment, the deck transition areas on two sides of the square plate are respectively five rib lines 2, so that the deck transition areas on two sides of the intersection point of the horizontal line 3 and the longitudinal section line 9 are respectively divided into five equal divisions to form four equal divisions on the longitudinal section line 9, the four equal divisions are mirrored about the deck central line 1 to obtain four mirror image points, the intersection point of the deck central line 1 and the rib line 2 in the deck transition area in the side view is projected into the cross view to obtain a second intersection point of the deck central line 1 and the rib line 2 in the cross view, the corresponding equal divisions, the second intersection point and the mirror image points are connected in an optical straight line manner to obtain an arch line 6, and the arch line 6 part between the deck central line 1 and the projection point is deleted;
and respectively making second tangent lines of the deck rib position beam arch lines 5 from a plurality of equally divided points to the middle part of the deck, deleting the parts of the deck rib position beam arch lines 5, which are positioned between the connecting line of the tangent points of the second tangent lines and the central line 1 of the deck, and connecting the deck rib position beam arch lines 5, the second tangent lines and the arch lines 6 to form deck rib position molded lines of a square plate smooth transition area.
In conclusion, the method adopts a geometric drawing method, is simple and easy to operate, can finish three-dimensional fairing of the molded lines, meets the performance requirement of the landing platform of the helicopter, provides a solid guarantee for smoothly assembling the landing grid on the slipway, adopts a method for fairing the molded lines of the deck in a square plate form in advance, changes the passive method of pulling and pulling the landing platform on site, reduces the heavy rework risk caused by non-passing acceptance in the later period, improves the manufacturing efficiency of the hull, and reduces the manufacturing cost.
The terms "first", "second", and the like are used herein to describe various information, but the information should not be limited to these terms, which are used only to distinguish the same type of information from each other. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (6)
1. A design method of a platform profile of a ship deck surface is characterized by comprising the following steps:
a. obtaining a projection line of the opening and the square plate installed on the deck profile line plan, enabling the center of the square plate to be coincident with the center of the opening, and enabling the center line of the square plate to be intersected with the center line of the deck at a point A, B;
b. obtaining each first intersection point of a line segment AB and a rib line of a deck type line cross section diagram on a deck central line, and taking a horizontal line through the first intersection point to cross a longitudinal line to obtain a first end point;
c. making a first tangent line of a deck rib position beam arch line from the first end point to the middle part of the deck to obtain a first tangent point, and connecting the deck rib position beam arch line, the first tangent line and the horizontal line to obtain a deck rib position molded line of a rib position section where the square plate is located;
d. the deck transition areas on two sides of the first end point are divided into a plurality of equal divisions respectively according to the number of the rib lines of the deck transition area, so that a plurality of equal divisions are formed on the longitudinal section line, the equal divisions are mirrored about the deck central line to obtain mirror image points, a second intersection point of the deck central line of the deck transition area and the rib lines is obtained in a transverse plane diagram, and an arch line is made to sequentially connect the corresponding equal divisions, the second intersection point and the mirror image points;
e. respectively making second tangent lines of the deck rib position beam arch lines to the middle part of the deck through a plurality of equally divided points to obtain second tangent points, and connecting the deck rib position beam arch lines, the second tangent lines and the arch lines to obtain deck rib position molded lines of a deck transition region;
in step b, the step of obtaining the first intersection point on the deck type line cross-section diagram comprises the following steps:
drawing A, B projection of the point on the side view of the deck profile, and connecting A, B points to obtain a projection line segment AB of the square plate on the side view;
and obtaining the distance between each intersection point of the line segment AB and the rib line on the lateral map and the base line, and making a point with the corresponding distance from the base line on the central line of the deck of the transverse map to obtain each first intersection point of the line segment AB and the rib line on the transverse map.
2. The design method of the hull deck surface platform profile according to claim 1, wherein the edge length value of the square plate is 1.5-2 times of the diameter of the opening.
3. The method for designing the hull deck platform profile according to claim 1, wherein in the step a, the center of the opening is located at the midpoint of the deck centerline.
4. The method of claim 1 wherein in step c, the portion of the deck rib position beam arches between the first tangent point and the deck centerline is removed.
5. The method of claim 1, wherein in step d, the arch line portion between the deck centerline and the proxel is deleted.
6. The method of claim 1 wherein in step e, the portion of the deck rib camber line between the second tangent point and the deck centerline is removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811173048.7A CN109367689B (en) | 2018-10-09 | 2018-10-09 | Design method of hull deck surface platform molded line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811173048.7A CN109367689B (en) | 2018-10-09 | 2018-10-09 | Design method of hull deck surface platform molded line |
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| CN109367689A CN109367689A (en) | 2019-02-22 |
| CN109367689B true CN109367689B (en) | 2020-10-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110083996A (en) * | 2019-05-31 | 2019-08-02 | 重庆交通大学 | A kind of shiplines design method based on susceptibility |
| CN111619755B (en) * | 2020-06-09 | 2021-05-04 | 中国船舶科学研究中心 | Hull profile design method based on convolutional neural network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1873051A1 (en) * | 2006-06-30 | 2008-01-02 | Technische Universiteit Delft | Ship |
| CN201395236Y (en) * | 2009-02-24 | 2010-02-03 | 曾海浩 | Helicopter deck |
| CN105151223B (en) * | 2015-09-24 | 2017-05-31 | 中船黄埔文冲船舶有限公司 | Transition fairing of line method |
| CN105416520B (en) * | 2015-11-17 | 2017-11-07 | 湖北海洋工程装备研究院有限公司 | A kind of beach oil storage tank |
| CN107235119B (en) * | 2017-06-14 | 2019-07-19 | 中船黄埔文冲船舶有限公司 | The method for fairing of molded line is built on a kind of |
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