Large opening platform box type damping beam

Abstract

The application discloses a large-opening platform box-type damping beam which is arranged on a large-opening platform in a ship chimney; the large-opening platform box-type damping beam comprises a platform plate and a bottom plate, a main web plate is fixedly arranged between the left end of the platform plate and the left end of the bottom plate, the bottom of the right end of the platform plate is fixedly provided with an upper web plate, the upper end surface of the right end of the bottom plate is fixedly provided with a lower web plate, the upper web plate is not connected with the lower web plate, the upper web plate and the lower web plate are vertically aligned, the platform plate, the main web plate, the bottom plate, the upper web plate and the lower web plate all extend along the longitudinal direction of the ship, the platform plate, the main web plate, the bottom plate, the upper web plate and the lower web plate surround to form a box-type component, the inner cavity of the box-type component is provided with a plurality of partition plates, the partition plates are distributed in the transverse direction, and the bottom plate, the upper web plate and the lower web plate are all provided with a plurality of through holes for reducing the weight. The large-opening platform box-type damping beam can provide stronger vertical support for the chimney platform, meanwhile, the vibration hidden danger of the panel of the support beam is avoided, the arrangement space of the equipment in the chimney is not influenced, and the structural weight influence is very small.

Description

Technical Field

[0001] This invention relates to the field of marine technology, and in particular to a large-opening platform box-type vibration damping beam. Background Technology

[0002] As modern commercial transport ships become increasingly larger, the overall stiffness of the hull tends to decrease, and the ship's natural frequency also decreases accordingly. The increasing speed of ships raises the frequency at which the hull encounters waves, and the continuous increase in main engine power also contributes to a gradually increasing probability of vibration problems. The larger size of ships also results in increasingly taller funnels. Funnels are typically large-opening, wide-span structures. For some tall and narrow funnels, the overall structural stiffness is relatively weak, and their proximity to the stern engine room makes them prone to structural vibration problems. To improve the stiffness of the funnel platform, appropriate support beam structures must be designed.

[0003] Conventional support beams consist of two vertically connected T-shaped members, which can only guarantee the vertical strength of the chimney platform, but the support beam panels are prone to lateral vibration, affecting the safety of the structure and equipment.

[0004] Taking a large container ship as an example, this ship is a twin-island design with the funnel located above the engine room. It has eight platform decks, with the upper multi-level platforms featuring large-opening structures. The ship uses two-stroke low-speed diesel engines with heavy loads and high propeller cavitation pressure, resulting in a significant vibration risk for the funnel structure. The upper platforms of this ship are large-span, open structures, and due to equipment layout constraints, only three longitudinal support beams can be installed. The conventional design for these support beams is a vertical T-shaped profile paired with narrow-sided platforms and panels. While this conventional design provides sufficient vertical support for the funnel platforms, the large span of the platforms and the space constraints imposed by the equipment result in insufficient structural rigidity of the support beams themselves. This leads to localized vibration problems at the upper and lower panels in the middle section of the support beams. The peak vibration of the upper and lower panels in this conventional design reaches as high as 30 mm / s, posing a significant vibration risk. Simply increasing the beam height or plate thickness is insufficient to solve the panel vibration problem with this type of support beam structure. Summary of the Invention

[0005] In order to overcome the above-mentioned defects in the existing technology, the present invention provides a large-opening platform box-type vibration damping beam.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution: A large-opening platform box-type vibration damping beam is installed on a large-opening platform inside a ship's funnel. It includes a platform plate and a bottom plate located below the platform plate. A main web plate is fixed between the left end of the platform plate and the left end of the bottom plate. An upper web plate is fixed to the bottom of the right end of the platform plate. A lower web plate is fixed to the upper surface of the right end of the bottom plate. The upper and lower web plates are not connected. The upper and lower web plates are aligned vertically. The platform plate, main web plate, bottom plate, upper web plate, and lower web plate all extend longitudinally along the ship. The platform plate, main web plate, bottom plate, upper web plate, and lower web plate form a box-shaped component. The inner cavity of the box-shaped component has several partitions. The partitions are laterally distributed. The bottom plate, upper web plate, and lower web plate all have multiple through holes for weight reduction.

[0007] Furthermore, the platform plate is parallel to the bottom plate; the main web plate is perpendicular to both the platform plate and the bottom plate.

[0008] Furthermore, the upper web plate is perpendicular to the platform plate.

[0009] Furthermore, the lower web is perpendicular to the base plate.

[0010] Furthermore, the diaphragm is perpendicular to the main web plate; the diaphragm is simultaneously fixed to the platform plate, the main web plate, the bottom plate, the upper web plate, and the lower web plate.

[0011] Furthermore, the partition is a rectangular plate.

[0012] Furthermore, the partitions are parallel to each other.

[0013] Furthermore, the connection between the partition and the base plate is located between adjacent through holes on the base plate.

[0014] Furthermore, the connection between the diaphragm and the upper web is located between adjacent through holes on the upper web.

[0015] Furthermore, the connection between the diaphragm and the lower web is located between adjacent through holes on the lower web.

[0016] The beneficial effects of this invention are as follows: The large-opening platform box-type vibration-damping beam of this invention adopts a box-shaped component formed by a platform plate, main web plate, bottom plate, upper web plate, and lower web plate to form a box-type vibration-damping structure; a large number of through holes are provided on the bottom plate, upper web plate, and lower web plate to reduce weight, thereby reducing the structural weight; at the same time, multiple partitions are also provided to enhance the structural strength. Compared with conventional solutions, the main web plate of this invention can have a smaller height, and the upper web plate, lower web plate, and bottom plate can have a smaller plate thickness. Compared with the prior art, the structural weight and space occupied by the support beam of this invention are not significantly different, but the structural stiffness of the support beam itself is significantly increased. The box-type vibration-damping beam of this invention can provide stronger vertical support for the chimney platform. The support beam of this invention has greater structural stiffness and can also avoid the hidden danger of panel vibration of the support beam. In the solution of this invention, the maximum peak vibration of the support beam is only 12mm / s, the vibration risk is extremely small, and it meets the requirements of ship specifications. The large-opening platform box-type vibration damping beam of the present invention can provide stronger vertical support for the chimney platform, while avoiding the hidden danger of panel vibration of the support beam, without affecting the equipment layout space inside the chimney, and with minimal impact on structural weight. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0018] Figure 2 for Figure 1 Schematic diagram of sectional view AA.

[0019] Figure 3 for Figure 1 Schematic diagram of the BB section.

[0020] Figure 4 for Figure 1 Schematic diagram of the CC section.

[0021] Figure 5 for Figure 1 View from D direction. Detailed Implementation

[0022] The present invention will be described more clearly and completely below with reference to a preferred embodiment and the accompanying drawings.

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a large-opening platform box-type vibration damping beam is installed on a large-opening platform inside a ship's funnel. It includes a platform plate 11 and a bottom plate 12 located below the platform plate. A main web plate 13 is fixed between the left end of the platform plate 11 and the left end of the bottom plate 12. The platform plate 11 is parallel to the bottom plate 12; the main web plate 13 is perpendicular to both the platform plate 11 and the bottom plate 12.

[0024] An upper web plate 14 is fixedly provided at the bottom right end of the platform plate 11; the upper web plate 14 is perpendicular to the platform plate 11.

[0025] A lower web plate 15 is fixed to the upper surface of the right end of the base plate 12; the lower web plate 15 is perpendicular to the base plate 12.

[0026] The upper abdominal plate 14 and the lower abdominal plate 15 are not connected; the upper abdominal plate 14 and the lower abdominal plate 15 are aligned vertically.

[0027] The base plate 12, upper web plate 14 and lower web plate 15 are all provided with multiple through holes 17 for weight reduction.

[0028] Platform plate 11, main web plate 13, bottom plate 12, upper web plate 14 and lower web plate 15 all extend along the longitudinal direction of the ship; platform plate 11, main web plate 13, bottom plate 12, upper web plate 14 and lower web plate 15 form a box-shaped component; the inner cavity of the box-shaped component is provided with several partitions 16; the partitions 16 are distributed laterally.

[0029] The partition 16 is perpendicular to the main web 13; the partition 16 is simultaneously fixed to the platform plate 11, the main web 13, the bottom plate 12, the upper web 14, and the lower web 15. The partition 16 is a rectangular plate. All partitions 16 are parallel to each other.

[0030] The partition plate and the through holes are not connected. The connection between the partition plate 16 and the base plate 12 is located between adjacent through holes on the base plate. The connection between the partition plate 16 and the upper web plate 14 is located between adjacent through holes on the upper web plate. The connection between the partition plate 16 and the lower web plate 15 is located between adjacent through holes on the lower web plate.

[0031] The large-opening platform box-type vibration-damping beam of the present invention adopts a box-shaped component formed by a platform plate, a main web plate, a bottom plate, an upper web plate, and a lower web plate to form a box-shaped vibration-damping structure; a large number of through holes are provided on the bottom plate, the upper web plate, and the lower web plate to reduce the weight of the structure; at the same time, multiple partitions are also provided to enhance the structural strength.

[0032] Compared with conventional solutions, the main web plate of this invention can have a smaller height, and the upper web plate, lower web plate, and bottom plate can have a smaller thickness.

[0033] The large-opening platform box-type vibration damping beam of this invention is used as a support beam providing vertical support in ship chimneys. Compared with existing technologies, the structural weight and space occupied by the support beam of this invention remain largely unchanged, but the structural stiffness of the support beam itself is significantly increased. The box-type vibration damping beam of this invention can provide stronger vertical support for chimney platforms.

[0034] The support beam of this invention has greater structural rigidity and can also avoid the potential for panel vibration. In the solution of this invention, the maximum peak vibration of the support beam is only 12 mm / s, with minimal vibration risk, meeting the requirements of ship specifications.

[0035] The large-opening platform box-type vibration damping beam of the present invention can provide stronger vertical support for the chimney platform, while avoiding the hidden danger of panel vibration of the support beam, without affecting the equipment layout space inside the chimney, and with minimal impact on structural weight.

[0036] 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 box-type vibration damping beam for a large-opening platform, which is installed on a large-opening platform inside a ship's funnel; characterized in that, It includes a platform plate and a bottom plate located below the platform plate. A main web plate is fixed between the left end of the platform plate and the left end of the bottom plate. An upper web plate is fixed at the bottom of the right end of the platform plate. A lower web plate is fixed at the upper end of the right end of the bottom plate. The upper web plate and the lower web plate are not connected. The upper web plate and the lower web plate are aligned vertically. The platform plate, main web plate, bottom plate, upper web plate, and lower web plate all extend longitudinally along the ship. The platform plate, main web plate, bottom plate, upper web plate, and lower web plate form a box-shaped component. The inner cavity of the box-shaped component is provided with several partitions. The partitions are distributed laterally. The bottom plate, upper web plate, and lower web plate are all provided with multiple through holes for weight reduction.

2. The large-opening platform box-type vibration damping beam as described in claim 1, characterized in that, The platform plate is parallel to the base plate; the main web plate is perpendicular to both the platform plate and the base plate.

3. The large-opening platform box-type vibration damping beam as described in claim 2, characterized in that, The upper web is perpendicular to the platform plate.

4. The large-opening platform box-type vibration-damping beam as described in claim 2, characterized in that, The lower web is perpendicular to the base plate.

5. The large-opening platform box-type vibration-damping beam as described in claim 2, characterized in that, The diaphragm is perpendicular to the main web plate; the diaphragm is simultaneously fixed to the platform plate, the main web plate, the bottom plate, the upper web plate, and the lower web plate.

6. The large-opening platform box-type vibration-damping beam as described in claim 5, characterized in that, The partition is a rectangular plate.

7. The large-opening platform box-type vibration damping beam as described in claim 5, characterized in that, The partitions are parallel to each other.

8. The large-opening platform box-type vibration damping beam as described in claim 5, characterized in that, The connection between the partition and the base plate is located between adjacent through holes on the base plate.

9. The large-opening platform box-type vibration-damping beam as described in claim 5, characterized in that, The connection between the diaphragm and the upper web is located between adjacent through holes on the upper web.

10. The large-opening platform box-type vibration-damping beam as described in claim 5, characterized in that, The connection between the diaphragm and the lower web is located between adjacent through holes on the lower web.

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