Method for determining the horizontal reference of ship interior in floating state

Abstract

This invention discloses a method for determining the internal horizontal reference of a ship in a floating state, comprising the following steps: S1, when the ship is berthed, determining the highest point of the deck in the ship's internal detection area; S2, when the ship is berthed, marking contour lines at a preset distance offset from the determined highest point of the deck; S3, when the ship is floating, determining the ship's internal horizontal reference based on the ship's heel difference; if the ship's heel difference is not less than 10mm, the contour lines are used as the ship's internal horizontal reference; if the ship's heel difference is less than 10mm, the actual tilt level of the deck is used as the ship's internal horizontal reference. When the ship is berthed, the highest point of the deck and the contour lines can be measured in advance, so that when the ship is floating, the required internal horizontal reference can be obtained based on its different degrees of heel difference. This method is simple and reliable to operate, improving the efficiency of internal horizontal reference measurement.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, and in particular to a method for determining the horizontal reference of ship interiors in a floating state. Background Technology

[0002] Large cruise ships represent the last jewel in the crown of my country's shipbuilding industry, and their construction challenges are self-evident. As vessels that provide accommodation, dining, and transportation for tourists, they require extremely high levels of interior quality even when the ship is floating. Since this is the first time my country has built a large cruise ship, research into methods for determining the interior quality standards of cruise ships in a floating state has significant practical implications.

[0003] In a floating state, the selection of the interior horizontal reference is crucial. For example, after the ship has been lifted and placed on the piers, i.e., after berthing, there may be a significant difference in heel height (the difference in heel height between the ship's left and right sides, representing the degree of tilt; the difference in heel height is equal to the difference between the actual tilt angle of the deck and the zero-point position of the deck when the ship is berthed, i.e., the displacement deviation). In this state, if the ground is used as the horizontal reference for interior decoration work, the amount of material to be applied will increase, causing a significant shift in the ship's center of gravity and affecting its stability. Furthermore, the increased material application will reduce the floor height, leading to interference during interior decoration work and making it impossible to guarantee the required interior clearance height. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defect in the prior art that the internal horizontal reference of a ship cannot be determined when the ship is in a floating state, and to provide a method for determining the internal horizontal reference of a ship in a floating state.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A method for determining the horizontal reference of ship interior components in a floating state mainly includes the following steps:

[0007] S1. When the vessel is in a docked state, determine the highest point of the deck in the internal detection area of ​​the vessel;

[0008] S2. When the vessel is in a docked state, the contour line is marked by a preset distance offset from the highest point of the deck.

[0009] S3. When the vessel is in a floating state, determine the internal horizontal reference of the vessel based on the ship's roll difference;

[0010] If the ship's heel difference is not less than 10 mm, the contour lines shall be used as the ship's interior horizontal reference.

[0011] If the ship's heel difference is less than 10 mm, the actual tilt level of the deck shall be used as the ship's interior level reference.

[0012] When the vessel is berthed, the highest point and contour lines of its deck can be measured first. This allows for the determination of the required internal level reference based on the vessel's varying degrees of heel when it is afloat. This method is simple and reliable, improving the efficiency of internal level reference measurement. Furthermore, this method offers high safety, eliminating the need for level reference testing while the vessel is afloat. This significantly improves the accuracy of construction precision checks, ensuring the accuracy and quality of construction.

[0013] Preferably, in step S1, the following conditions must be met:

[0014] The hardness of the deck is within ±4mm, and the flatness of the deck is within 4mm.

[0015] Preferably, in step S1, a level measuring tool is used to measure the level of the deck in the internal detection area and determine the highest point.

[0016] Preferably, in step S1, a laser level is used to measure the level of the deck in the internal detection area and determine the highest point.

[0017] Preferably, in step S2, the contour marking includes marking a 1-meter contour line by shifting the highest point of the deck upwards by 1 meter in the vertical direction.

[0018] Preferably, step S2 further includes the following steps:

[0019] Select at least three points on the one-meter contour line in different areas of the ship to determine the surface on which the contour line is located.

[0020] Preferably, in step S2, contour lines are marked according to the highest point of the deck.

[0021] When the detection area is a public area, contour lines are marked on the support wall;

[0022] When the detection area is a cabin, contour lines are marked on the walls of the cabin.

[0023] Preferably, when the detection area is a public area,

[0024] Lines are drawn on all four sides of the rectangular pillars in the public area;

[0025] And / or, draw dashed lines on the circular pillars in the public area, with each dashed line spaced 120° apart from the circular pillars.

[0026] Preferably, when the detection area is a cabin,

[0027] Draw lines on the unstructured walls of the compartment, with one end of the line segment 4m away from the intersection of two adjacent walls.

[0028] Preferably, the following steps are included after step S3:

[0029] Using the contour lines as a reference, an interference test line for the interior height is determined based on the interior height of the ship's internal inspection area. A horizontal light meter is used to illuminate the interior height at the interference test line, and the collision point values ​​of the interior height and outfitting components in the ship's internal inspection area are measured for interference detection.

[0030] The positive and progressive effects of this invention are as follows: When the ship is berthed, the highest point and contour lines of its deck can be measured in advance. This allows the required internal level reference to be determined based on the ship's varying degrees of heel when it is afloat. This method is simple and reliable, improving the efficiency of internal level reference measurement. Furthermore, this method offers high safety, eliminating the need for level reference testing while the ship is afloat. This also significantly improves the accuracy of construction precision checks, ensuring the accuracy and quality of construction. Attached Figure Description

[0031] Figure 1 This is a flowchart illustrating a preferred embodiment of the method for determining the horizontal reference of ship interiors in a floating state according to the present invention.

[0032] Figure 2 This is a schematic diagram illustrating the determination of the interference test line for the internal component height according to a preferred embodiment of the present invention.

[0033] Figure 3 This is a schematic diagram of the contour line markings above the deck, which is a preferred embodiment of the present invention.

[0034] Figure 4 This is a schematic diagram of contour line markings on the enclosure wall, which is a preferred embodiment of the present invention.

[0035] Figure 5 This is a schematic diagram of the contour line markings for the entire cruise ship, which is a preferred embodiment of the present invention. Detailed Implementation

[0036] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0037] like Figures 1-5 This paper discloses a method for determining the horizontal reference of ship interiors in a floating state, which mainly includes the following steps:

[0038] S1. When the ship is berthed, determine the highest point of the deck in the internal inspection area of ​​the ship;

[0039] S2. When the ship is berthed, offset the predetermined distance marker contour line according to the determined highest point of the deck;

[0040] S3. When the ship is floating, determine the ship's internal level reference based on the ship's trim difference;

[0041] If the ship's heel difference is not less than 10mm, the contour lines shall be used as the ship's internal horizontal reference.

[0042] If the ship's heel difference is less than 10mm, the actual tilt level of the deck shall be used as the internal level reference for the ship.

[0043] When a ship is floating, it cannot guarantee that the plane of the deck will remain parallel to the ground. Continuing construction under these conditions necessitates establishing new benchmarks to guide subsequent work. Therefore, the floating ship interior horizontal benchmark determination method described in this invention is essential. This method can continue to guide construction while the ship is afloat, thereby improving production efficiency and ensuring on-time completion.

[0044] Therefore, in this invention, when the ship is berthed, the highest point and contour lines of its deck can be measured first. This allows the required internal level reference to be determined based on the ship's varying degrees of heel when it is afloat. This method is simple and reliable, improving the efficiency of internal level reference measurement. Furthermore, this method offers high safety, eliminating the need to check the level reference while the ship is afloat, and significantly improving the accuracy of construction precision checks, ensuring the accuracy and quality of construction.

[0045] In a preferred embodiment, step S1 requires that the deck's hardness level be ±4mm and the deck's flatness be 4mm. Under these conditions, the measurement of the highest point of the deck can be more effectively achieved.

[0046] In a preferred embodiment, in step S1, a leveling tool is used to measure the level of the deck in the internal inspection area and determine the highest point. Preferably, a laser level is used to measure the level of the deck in the internal inspection area and determine the highest point.

[0047] Step S1 specifically includes the following steps:

[0048] S11. Install a floor-standing horizontal light meter;

[0049] S12. Irradiate any basic data within the detection area;

[0050] S13. Collect deck height data at as many different measurement points as possible, i.e., obtain N hard-bar data points within the detection area;

[0051] S14. Measure the highest and lowest points of the detection area to determine the zero point of the deck, and use this zero point of the deck as the zero point of the interior height.

[0052] In step S1, the height of the deck top surface at different locations in the detection area is measured using a horizontal light meter. During the measurement process, the height of the horizontal light meter is fixed.

[0053] As a preferred embodiment, such as Figures 3-5 As shown, in step S2, the contour marking includes marking a 1-meter contour line by shifting the highest point of the deck 1 meter upward in the vertical direction.

[0054] Preferably, at least three points are selected on the one-meter contour lines in different areas of the ship to determine the surface on which the contour lines lie. In this embodiment, three points are selected, and three points determine one surface. In other embodiments, the selection can be adjusted as needed.

[0055] When the detection area is a public area, contour lines are marked on the support wall. Specifically, lines are drawn on all four sides of the rectangular support in the public area, and / or dashed lines are drawn on the circular support in the public area, with each dashed line spaced 120° apart from the circular support.

[0056] When the detection area is a cabin, the contour lines are marked on the non-structural wall of the cabin, that is, on the smooth side of the wall, so as to facilitate the marking and identification by the staff. Specifically, lines are drawn on the wall of the cabin, with one end of the line segment 4m away from the intersection of the two adjacent points.

[0057] In this embodiment, yellow paint is used to draw lines and marks on the pillars and walls. Pillars and walls in public areas need to be marked, and each compartment needs to be marked with ≥5 marks.

[0058] In a preferred embodiment, the following steps are included after step S3: using contour lines as a reference, determining the internal installation height interference test line based on the internal installation height of the ship's internal inspection area, irradiating the internal installation height with a horizontal light meter at the internal installation height interference test line, and measuring the internal installation height of the ship's internal inspection area and the collision point value of the outfitting components for interference detection.

[0059] Based on the measured highest point of the deck, the thickness of the lining material in the design area is calculated, the actual interior decoration height is determined, and the interference test line for the interior decoration height is obtained. To reduce the lining material thickness, a comprehensive discussion is held to determine whether to modify the highest point of the deck.

[0060] Specifically, such as Figure 2As shown, a represents the highest point of the deck, b represents the 1-meter contour line, c represents the interior height, and d represents the interior height interference test line. That is, by subtracting a and b from c, we can obtain the interior height interference test line d.

[0061] After measuring the collision point values, record them on the accuracy measurement table. If interference occurs, there are several possible causes, and correction methods for each cause are given:

[0062] First, the cause of the interference: the location of the outfitting model during the design phase; the corrective measures: it is recommended that the design team conduct self-checks and troubleshooting, and that interference be corrected in advance on site.

[0063] Second, the cause of the interference was the on-site outfitting and installation problem; the corrective measure was to correct it after internal inspection.

[0064] Third, the cause of the interference: insufficient interior space due to deck level and structural layer height; the corrective measure: correction after internal inspection.

[0065] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A method for determining a horizontal reference inside a ship in a floating state, characterized in that, The method mainly comprises the following steps: S1, determining the highest point of a deck in an internal detection area of a ship when the ship is in a berthing state; S2, selecting at least three points on an isohypse of different areas of the ship according to the determined highest point of the deck offset by a preset distance to mark the isohypse when the ship is in the berthing state, and determining a plane where the isohypse is located; S3, determining an internal installation level reference of the ship according to a roll difference of the ship when the ship is in a floating state; If the roll difference of the ship is not less than 10 mm, taking the isohypse as the internal installation level reference of the ship; If the roll difference of the ship is less than 10 mm, taking an actual inclined level of the deck as the internal installation level reference of the ship.

2. The method for determining the horizontal reference of ship interior in a floating state as described in claim 1, characterized in that, In step S1, the following conditions are met: The hard level of the deck meets ±4 mm, and the flatness of the deck meets 4 mm.

3. The method for determining the horizontal reference of ship interior in a floating state as described in claim 1, characterized in that, In step S1, a horizontal measurement tool is used to measure the deck in the internal detection area and determine the highest point.

4. The method of claim 1 or 3, wherein In step S1, a laser level is used to measure the deck in the internal detection area and determine the highest point.

5. The method of claim 1, wherein the step of determining the level reference comprises the step of: determining the level reference based on the waterline height and the displacement of the vessel. In step S2, the isohypse marking comprises marking a 1-meter isohypse in a vertical direction upward by 1 meter based on the highest point of the deck.

6. The method of claim 1, wherein the step of determining the level reference comprises the step of: determining the level reference based on the level of the water in the tank. In step S2, the isohypse is marked according to the highest point of the deck, When the detection area is a public area, the isohypse marking is on a support column surrounding wall; When the detection area is a cabin, the isohypse marking is on a wall surface of the cabin.

7. The method of claim 1 or 6, wherein When the detection area is a public area, Lines are drawn on four sides of a rectangular support column in the public area; And / or, a dotted line is drawn on a circular support column in the public area, and each segment of the dotted line is set at an interval of 120° of a sector of the circular support column.

8. The method of claim 1 or 6, wherein When the detection area is a cabin, Lines are drawn on a non-structural wall surface of the cabin, and one end of the line segment is 4 m away from the intersection of the adjacent two wall surfaces.

9. The method of claim 1, wherein the step of determining the level reference comprises the step of: determining the level reference based on the level of the water in the tank. The method further comprises the following steps after step S3: According to the internal installation height of the internal detection area of the ship, an internal installation height interference detection line is determined based on the isohypse, a horizontal light instrument is used for irradiation at the internal installation height interference detection line, the internal installation height of the internal detection area of the ship and the collision point value of the outfitting piece are measured, and interference detection is performed.

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