A narrow, elevated vibration control structure

Abstract

The present application belongs to the technical field of ship design and manufacturing, and discloses a vibration control structure of a long and narrow superstructure. Vertical struts are arranged at the distal end of the wing bridge of the superstructure. Inclined struts are arranged between the connection position A between the wing bridge and the side wall of the superstructure and the connection position B between the struts and the deck. A longitudinal bulkhead is arranged in the engine room area in alignment with the side wall of the superstructure. The vibration response in the X, Y and Z directions of the long and narrow superstructure can be controlled simultaneously through the three aspects of reinforcement measures, and a good working and living environment is provided for the crew.

Description

Technical Field

[0001] This invention relates to a vibration control structure for ship superstructure, belonging to the field of ship design and manufacturing technology. Background Technology

[0002] In bulk carriers, the dual fuel tanks are typically located on either side of the superstructure, causing the superstructure to become narrower. To maintain the necessary usable floor space, designers often increase the number of superstructure levels. Consequently, the superstructure is characterized by its long, narrow, and towering shape.

[0003] The primary excitation force on bulk carriers is the sixth-order unbalanced moment of the main engine. This moment is close to the natural frequency of the superstructure and is an H-shaped lateral moment. Therefore, vibration problems are particularly prominent in the long, narrow, and tall superstructure.

[0004] Traditional superstructure reinforcement generally employs two methods: such as Figure 1 and Figure 2 As shown, diagonal bracing is installed at the far end of the wing bridge and welded to the superstructure sidewall, or a support column is installed at the far end of the wing bridge and welded to the deck. Calculations show that if the traditional superstructure reinforcement method is used, the lateral vibration response of the long, narrow, and tall superstructure's bridge deck will reach 16.2 mm / s, far exceeding the allowable value.

[0005] In order to maintain good working and living conditions for the crew, there is an urgent need for an efficient vibration control structure to reduce the vibration response of the long and narrow tower. Summary of the Invention

[0006] The purpose of this invention is to provide a more efficient vibration control structure to effectively reduce the vibration response of a long, narrow, and tall building.

[0007] The technical solution of this invention is as follows: A vibration control structure for a narrow superstructure is provided, comprising a wing bridge with one end fixedly connected to the sidewall of the superstructure and the other end extending away from the sidewall. A support column is provided at the distal end of the wing bridge, extending towards the deck and fixed to it. A diagonal strut is connected at the fixed junction of the wing bridge and the sidewall of the superstructure, extending diagonally to connect with the bottom of the support column. Preferably, the width of the support column is 2-3 deck longitudinal rib spacings. The outer side plate of the support column is aligned with the deck longitudinal rib or the inner hull longitudinal bulkhead. The inner side of the support column is aligned with the deck longitudinal rib.

[0008] Preferably, the strut has parallel outer and inner side plates, with the outer side plates aligned with the inner shell longitudinal bulkhead of the fuel tank inside the engine room, and the inner side plates aligned with the deck longitudinal ribs.

[0009] Preferably, the wing bridge includes a rear railing; the upper end of the rear wall panel of the support column is aligned with the rear railing of the wing bridge, and the lower end of the rear wall panel of the support column is aligned with the crossbeam of the deck.

[0010] Preferably, the front bulkhead of the strut is aligned with the front bulkhead of the cabin. The distance between the lower end of the rear bulkhead and the front bulkhead is not less than 6m.

[0011] Preferably, diagonal struts are installed at the connection between the wing bridge and the superstructure sidewall, and between the lower ends of the rectangular supports. The cross-section of the diagonal struts is rectangular or circular. The size of the diagonal struts has little impact on the vibration of the superstructure; therefore, while ensuring construction conditions, the size of the diagonal struts should be minimized to reduce wind resistance. Installing diagonal struts can reduce the lateral vibration response by approximately 60%.

[0012] Preferably, the width B1 of the support column is 1200mm~2500mm, and the thickness of the support column's surrounding plate is 10mm~15mm.

[0013] Preferably, the cross-section of the diagonal strut is rectangular; the rectangular cross-section includes a front wall aligned with the upper front wall, the cross-section length L2 is 800mm~2000mm, the cross-section width B2 is 800mm~2000mm, and the plate thickness of the diagonal strut is 10mm~15mm.

[0014] Preferably, the cross-section of the diagonal strut is circular; the diameter of the circular cross-section is 800mm~1600mm, and the thickness of the diagonal strut is 10mm~15mm.

[0015] Preferably, the support column further includes a front wall panel and a rear wall panel arranged opposite each other, with the front wall panel aligned with the upper part of the support; the rear wall panel is arranged at an angle. Through holes are provided in the lower parts of the front and rear walls of the support column to allow personnel passage.

[0016] Preferably, longitudinal bulkheads should be installed in the cabin area aligned with the superstructure sidewalls. Compared to installing longitudinal girder and strut, installing longitudinal bulkheads can reduce vibration response by about 25%.

[0017] Preferably, the longitudinal bulkhead of the cabin area is welded to the deck and cabin platform, and its lower end is provided with longitudinal girder and support column.

[0018] The present invention has the following beneficial effects: The present invention provides a relatively efficient vibration control structure that can reduce the maximum lateral vibration response of the deck to 4.8 mm / s.

[0019] This invention provides a highly efficient vibration control structure. Its principle lies in the fact that the use of supports and the inclined arrangement of their rear walls effectively limit the vertical and longitudinal vibration response of the superstructure. By installing diagonal struts, the lateral vibration response of the long, narrow superstructure can be effectively controlled. The longitudinal bulkheads inside the engine room, aligned with the superstructure sidewalls, increase the support stiffness at the superstructure's base, simultaneously reducing vibration response in all three directions within the superstructure area. These three strengthening measures provide a good working and living environment for the crew. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a traditional method for enhancing vibration in superstructures. Figure 2 This is a schematic diagram of the second traditional method for strengthening vibration on the superstructure. Figure 3a A schematic diagram of the vibration control structure built on a narrow top provided by the present invention; Figure 3b This is a schematic cross-sectional view of the column of the present invention; Figure 3c This is a schematic cross-sectional view of the diagonal strut of the present invention; Figure 4 A side view of the column of the vibration control structure built on a narrow top, provided by the present invention. Detailed Implementation

[0021] To make the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings: This invention provides a more efficient vibration control structure to effectively reduce the vibration response of a long, narrow, and tall building.

[0022] As shown in Figure 3, a wing bridge 1 extends horizontally from the top of the superstructure sidewall. A strut 2, whose bottom connects to the deck, is located at the end of the wing bridge 1 furthest from the superstructure sidewall. The width B1 of the strut 2 is 1760 mm. The strut 2 has parallel outer side plates 21 and inner side plates 22. The outer side plates 21 are aligned with the inner shell longitudinal bulkhead of the fuel tanks inside the engine room. The inner side plates 22 of the strut 2 are aligned with the deck longitudinal ribs. Figure 4 As shown, the front bulkhead 23 of the support column 2 is aligned with the upper front bulkhead. The rear bulkhead 24 of the support column 2 is arranged at an angle, with its upper end aligned with the rear railing 3 of the wing bridge and its lower end aligned with the deck beam 4. The distance D between the lower end of the rear bulkhead 24 and the front bulkhead 23 is 6960mm. The thickness of the bulkhead 2 of the support column is 10mm.

[0023] As shown in Figure 3, point A is the intersection of the wing bridge and the superstructure sidewall, and point B is the intersection of the support column 2 and the deck. Connecting points A and B, we obtain the direction line of the diagonal strut and install diagonal strut 5 along this direction line. One end of diagonal strut 5 is fixed at point A, and the other end is fixed at point B. The cross-section of diagonal strut 5 is rectangular. The lower wall 51 of the diagonal strut is aligned with the deck longitudinal rib and is set along the direction line. The upper wall 52 of the diagonal strut is parallel to the lower wall 51, and the distance between them, B2, is 1200mm. The front wall 53 of the diagonal strut is aligned with the front wall of the superstructure, and the cross-sectional length L2 of the diagonal strut is 1200mm. The wall plate thickness of diagonal strut 5 is 12mm.

[0024] The lower part of the front wall panel 23 and the rear wall panel 24 of the support column 2 is provided with through holes 6 to allow personnel to pass through.

[0025] Align the upper sidewalls and construct longitudinal bulkheads 7 in the engine room area. Longitudinal bulkheads 7 are welded to the deck and engine room platform. Longitudinal girder and support columns 8 are installed at the lower end of longitudinal bulkheads 7.

[0026] Compared to traditional superstructure reinforcement methods, the vibration control structure provided by this invention can simultaneously control the vibration response of a long, narrow, and tall superstructure in the X, Y, and Z directions through three reinforcement measures, reducing the maximum lateral vibration response of the superstructure from 16.2 mm / s to 4.8 mm / s. Specifically, the inclined arrangement of the support column 2 and its rear wall panel 24 effectively limits the vertical and longitudinal vibration response of the superstructure; the installation of the diagonal strut 5 reduces the maximum lateral vibration response of the superstructure by approximately 60%; and the installation of a longitudinal bulkhead 7 aligned with the sidewalls of the superstructure inside the cabin increases the support stiffness at the base of the superstructure, simultaneously reducing the vibration response in the X, Y, and Z directions of the superstructure area. Compared to using longitudinal girder and support columns aligned with the sidewalls of the superstructure inside the cabin, the longitudinal bulkhead reduces the lateral vibration response by approximately 25%.

[0027] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from the present invention, and these improvements and additions should also be considered within the scope of protection of the present invention. Any modifications, alterations, and equivalent changes made by those skilled in the art based on the above-disclosed technical content without departing from the spirit and scope of the present invention are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A vibration control structure built on a narrow, elongated top, characterized in that: The structure includes a wing bridge (1) with one end fixedly connected to the superstructure sidewall and the other end extending away from the superstructure sidewall. A support column (2) is installed at the far end of the wing bridge (1), extending towards the deck and fixed to the deck. The support column (2) has an outer side plate (21) and an inner side plate (22) arranged in parallel. The outer side plate (21) is aligned with the inner shell longitudinal bulkhead of the fuel tank inside the engine room, and the inner side plate (22) is aligned with the deck longitudinal rib. The support column (2) also includes a front bulkhead (23) and a rear bulkhead (24) arranged opposite to each other. The front bulkhead (23) is aligned with the front of the superstructure. Wall; rear wall panel (24) is arranged at an angle; the lower part of the front wall panel (23) and the rear wall panel (24) is provided with through holes for personnel passage; the wing bridge (1) includes a rear railing (3), the upper end of the rear wall panel (24) is aligned with the rear railing (3) of the wing bridge, and the lower end of the rear wall panel (24) is aligned with the crossbeam (4) of the deck; the wing bridge (1) is connected to the fixed intersection with the superstructure side wall with a diagonal strut (5), the diagonal strut (5) extends diagonally to connect with the bottom of the support column (2); a longitudinal bulkhead (7) is provided in the cabin area aligned with the superstructure side wall.

2. The vibration control structure built on a narrow, elongated top as described in claim 1, characterized in that, The distance D between the lower end of the rear wall panel (24) and the front wall panel (23) is not less than 6m.

3. The vibration control structure built on a narrow, elongated top as described in claim 1, characterized in that, The width B1 of the support column (2) is 1200mm~2500mm, and the thickness of the surrounding plate of the support column (2) is 10mm~15mm.

4. The vibration control structure built on a narrow, elongated top as described in claim 1, characterized in that, The cross-section of the diagonal strut (5) is rectangular; the rectangular cross-section includes a front wall (53) aligned with the upper front wall, the cross-section length L2 is 800mm~2000mm, the cross-section width B2 is 800mm~2000mm, and the plate thickness of the diagonal strut (5) is 10mm~15mm.

5. The vibration control structure built on a narrow, elongated top as described in claim 1, characterized in that, The cross-section of the diagonal strut (5) is circular; the diameter of the circular cross-section is 800mm~1600mm, and the thickness of the diagonal strut (5) is 10mm~15mm.

6. The vibration control structure built on a narrow, elongated top as described in claim 1, characterized in that, The longitudinal bulkhead (7) of the cabin area is welded to the deck and cabin platform, and its lower end is provided with longitudinal girder and support column (8).

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