Ship deck damping device

Abstract

The utility model provides a ship deck damping device which comprises a box-shaped body, a damping object is arranged in the box-shaped body, and the box-shaped body comprises a bottom plate, a first box body side plate vertically installed on the long edge of the bottom plate and a second box body side plate vertically installed on the short edge of the bottom plate. Two first L-shaped lug plates are fixed to the two ends, in the length direction, of the outer side wall of the first box body side plate on one side in a mirror symmetry mode, and the upper ends of the two first L-shaped lug plates incline in the direction deviating from each other. Second L-shaped lug plates are fixed to one sides of the two second box body side plates, the second L-shaped lug plates are vertically arranged, and the upper portions of the two first L-shaped lug plates and the upper portions of the second L-shaped lug plates are provided with bolt holes and first bolts; the upper ends of the first L-shaped lug plate and the second L-shaped lug plate are detachably connected with the longitudinal bone through first bolts. The ship deck damping device is connected with a ship deck structure in a bolt fixing mode, dismounting and mounting are convenient, and deck paint and dressing damage caused by welding operation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of ship vibration reduction, in particular to a ship deck vibration reduction device. Background Art

[0002] During the voyage of a ship, under the action of various dynamic loads such as the propulsion system and waves, it is inevitable that the ship's equipment and structures will vibrate. Excessive vibration will affect the safety and comfort of the ship, especially for the work and living cabins on the ship. Vibration directly affects the work efficiency and comfort of the crew. Relevant specifications and standards also put forward vibration control requirements. However, due to the complexity of internal and external factors of ship vibration, it is difficult to completely eliminate the vibration risk during the ship design stage. Various local vibration problems are often exposed during the ship's sea trials. Since the ship is in a state of completion and waiting for delivery at this stage, the rework caused by the vibration problem treatment will increase the construction cost. The extension of the shipbuilding cycle caused by vibration treatment may even affect the ship's delivery on schedule.

[0003] Taking the vibration problem of a deck in a living cabin exposed during the trial stage of a ship as an example, the common measure adopted in engineering is to strengthen the structure by adding frame materials or profiles to the back of the deck in the area with large vibration, changing the natural frequency of the original structure to avoid the resonance frequency. This method often requires a large amount of materials and a certain degree of installation difficulty, and the heat generated by the welding operation will damage the deck paint and dressing, causing secondary repair costs. In addition, this method is difficult to flexibly adjust during the navigation vibration test. If the actual ship test effect is not good, the structure needs to be changed and strengthened, and the vibration control efficiency and cycle are uncontrollable. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a ship deck vibration reduction device, which is used to treat the harmful vibration problem of the cabin deck exposed during the ship trial stage. The device is connected to the ship deck structure by bolt fixing, which is convenient for disassembly and installation, and avoids damage to the deck paint and dressing caused by welding operations. The device can flexibly adjust the installation position during the ship's navigation vibration test stage, and can also conveniently adjust the weight of the device, so as to achieve the regulation of the natural frequency of the deck structure system in the area with large vibration, avoid the resonant frequency and thus suppress the deck vibration.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A ship deck vibration reduction device comprises a box-shaped body, a vibration reduction object for adjusting weight is arranged inside the box-shaped body, and the box-shaped body is detachably connected to the lower end surface of the deck.

[0007] Furthermore, the deck includes a deck plate, a transverse beam installed on the deck plate along the ship width direction and downward in the plumb direction on the lower end surface of the deck plate, and a longitudinal bone installed on the deck plate along the ship length direction and downward in the plumb direction.

[0008] Furthermore, the box-type body includes a bottom plate, a first box side plate vertically installed on the long side of the bottom plate, and a second box side plate vertically installed on the short side of the bottom plate, and two first L-shaped ear plates are fixed in a mirror-symmetrical manner at both ends of the length direction of the outer wall of the first box side plate on one side, and the upper ends of the two first L-shaped ear plates are provided with bolt holes and first bolts, and the upper ends of the two first L-shaped ear plates are inclined in directions away from each other; second L-shaped ear plates are fixed on one side of the two second box side plates away from the first box side plates provided with the first L-shaped ear plates, and the two second L-shaped ear plates are vertically arranged, and bolt holes and first bolts are provided on the upper parts of the second L-shaped ear plates; the upper ends of the first L-shaped ear plates and the second L-shaped ear plates are detachably connected to the longitudinal bones through the first bolts.

[0009] Furthermore, the box-type body also includes a top cover and a plurality of baffles, wherein the top cover is horizontally placed inside the box-type body, and a plurality of groups of first flat steels perpendicular to the bottom plate are relatively arranged on the inner walls of the two first box body side plates, and a plurality of second flat steels are installed on the inner wall of the bottom plate along the long side direction, and the plurality of second flat steels are respectively and vertically intersected and connected with a group of relatively arranged first flat steels; the first flat steels are provided with a plurality of bolt holes at intervals from bottom to top, and bolt holes and second bolts are symmetrically provided at both ends of the plurality of baffles, and the baffles are placed inside the box-type body and above the top cover, and the two ends of the baffles are detachably connected to the two relatively arranged first flat steels by second bolts.

[0010] Furthermore, the first flat steels are provided in two groups, and the two groups of first flat steels are located at two trisection positions of the first box side plate along the long side direction.

[0011] Furthermore, a plurality of sets of hanging brackets are relatively provided on the outer side walls of the two first box side panels, and the hanging brackets are perpendicular to the first box side panels.

[0012] Furthermore, the hanging bracket is arranged opposite to the first flat steel.

[0013] Furthermore, the distance between the outer peripheral side of the top cover and the inner wall of the box-shaped body is 1-2 mm, a notch is provided at the relative position between the top cover and the first flat steel, and the top cover and the first flat steel are embedded.

[0014] Furthermore, the web height of the cross beam is h1, the distance between two adjacent cross beams is m, the web height of the longitudinal bone is h2, the distance between two adjacent longitudinal bones is n, the length of the box body is a, the width is b, and the height is c, wherein a <m-500mm;b=n;c=h1-h2-30mm。

[0015] Furthermore, the vibration damper is a particle.

[0016] The application method of the ship deck vibration reduction device of the utility model is:

[0017] s1. According to the ship's navigation vibration test and physical sensation, determine the area where vibration control is required on the deck, referred to as target area A;

[0018] s2. Determine the center position of the target area A, recorded as position B;

[0019] s3. According to the positioning of the first L-shaped ear plate and the second L-shaped ear plate of the vibration reduction device, drill bolt holes on the longitudinal web plate below the deck at position B;

[0020] s4, connecting the vibration reduction device pre-filled with half of the granular material (such as sand) to the deck longitudinal bone through bolts;

[0021] s5. Perform vibration measurement again to observe the vibration reduction effect. If the vibration reduction effect meets expectations, the step ends. If the vibration reduction effect is not good, go to s6;

[0022] s6, dismantle the vibration reduction device, adjust the weight by adding sand, and repeat s4 to s6 until the expected vibration reduction effect is obtained, or the sand in the vibration reduction device is filled, and then execute s7;

[0023] S7. Install one or more sets of vibration reduction devices on the adjacent longitudinals of the longitudinals below the deck at position B in a manner similar to S3 to S6.

[0024] The technical principle of the ship deck vibration reduction device of the utility model is: assuming that the natural frequency of the deck structure is , the frequency of the internal and external vibration excitation source when the ship is sailing is ,when and satisfy When the relationship is high, the deck structure will resonate and show large vibrations. Let’s use the calculation formula for the natural frequency of the local deck plate frame structure mentioned in the China Classification Society’s “Guidelines for Vibration Control on Ships” to explain: , in the formula Represents the corresponding The natural frequency of the frame is the main vibration mode, Represents the corresponding The plate frame of the main vibration mode is quite stiff. Corresponding to The ship deck vibration reduction device of the utility model is connected to the hull structure by bolt connection, and the original hull rigidity is basically not changed. , by adding or removing sand, the mass of the vibration reduction device can be adjusted to flexibly change the weight of the deck structure system , thereby adjusting the natural frequency of the deck structure, avoiding the resonant frequency and achieving the purpose of reducing the vibration of the deck structure.

[0025] Compared with the prior art, the utility model is used to control the harmful vibration problem of the cabin deck exposed during the trial stage of the ship. The device is connected to the ship deck structure by bolt fixing, which is convenient for disassembly and installation, avoiding damage to the deck paint and dressing caused by welding operations. The device can flexibly adjust the installation position during the ship's navigation vibration test stage, and can also conveniently adjust the weight of the device to achieve the regulation of the natural frequency of the deck structure system in the area with large vibration, avoid the resonant frequency and thus suppress the deck vibration; the utility model can be used as an effective alternative to solve the shortcomings of the existing vibration control technology, such as high cost, inconvenient construction, and difficulty in flexible adjustment during the navigation test stage, and has strong engineering significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional installation of the vibration reduction device of the present invention on the deck structure;

[0027] Figure 2 It is a schematic diagram of the three-dimensional structure of a ship deck vibration reduction device according to the present invention;

[0028] Figure 3 yes Figure 1 A top view of

[0029] Figure 4 yes Figure 3 Middle AA section view;

[0030] Figure 5 yes Figure 3 Middle BB section view;

[0031] Figure 6 yes Figure 3 Middle CC section view;

[0032] Figure 7 yes Figure 3 Middle DD section view.

[0033] Among them, 1-box body, 101-bottom plate, 104-top cover, 203-baffle, 102-first box side plate, 103-second box side plate, 201-first L-shaped ear plate, 202-hanging code, 203-baffle, 204-second L-shaped ear plate, 300-vibration damper, 401-first flat steel, 402-second flat steel, 501-second bolt, 502-first bolt, 601-deck plate, 602-crossbeam, 603-longitudinal bone. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] like Figure 1-Figure 7As shown, a ship deck vibration reduction device, the deck includes a deck plate 601, a crossbeam 602 installed on the deck plate 601 along the ship width direction and downward in the plumb direction on the lower end surface of the deck plate 601, and a longitudinal bone 603 installed on the deck plate 601 along the ship length direction and downward in the plumb direction; the vibration reduction device includes a box body 1, inside of which a vibration reduction object 300 for adjusting weight is placed, and the vibration reduction object 300 is sand; the box body 1 includes a bottom plate 101, a top cover 104, two baffles 203, a first box side plate 102 vertically installed on the long side of the bottom plate 101, and a second box side plate vertically installed on the short side of the bottom plate 101 103, two first L-shaped ear plates 201 are fixed in a mirror-symmetrical manner at both ends of the length direction of the outer wall of the first box side plate 102 on one side, and bolt holes and first bolts 502 are provided at the upper ends of the two first L-shaped ear plates 201, and the upper ends of the two first L-shaped ear plates 201 are inclined in directions away from each other; second L-shaped ear plates 204 are fixed on one side of the two second box side plates 103 away from the first box side plate 102 provided with the first L-shaped ear plates 201, and the two second L-shaped ear plates 204 are vertically arranged, and bolt holes and first bolts 502 are provided on the upper parts of the second L-shaped ear plates 204; the first L-shaped ear plates 201 and the second L-shaped ear plates 204 The upper end is detachably connected to the longitudinal bone 603 by the first bolt 502; two groups of first flat steels 401 perpendicular to the bottom plate 101 are arranged on the inner side walls of the two first box side plates 102, and the two groups of first flat steels 401 are located at two trisection positions of the first box side plates 102 along the long side direction; two second flat steels 402 are installed on the inner side wall of the bottom plate 101 along the long side direction, and the two second flat steels 402 are respectively connected to a group of oppositely arranged first flat steels 401 perpendicularly; the first flat steel 401 is provided with a plurality of bolt holes at intervals from bottom to top; the top cover 104 is horizontally placed inside the box body 1, and the outer peripheral side of the top cover 104 is connected to the box body 1 The spacing between the inner walls is 1~2mm, and a notch is opened at the relative position between the top cover 104 and the first flat steel 401, and the top cover 104 and the first flat steel 401 are embedded; bolt holes and second bolts 501 are symmetrically provided at both ends of the two baffles 203, and the baffles 203 are placed in the box-shaped body 1 and located above the top cover 104, and the two ends of the baffles 203 are detachably connected to the two oppositely arranged first flat steels 401 through the second bolts 501; two groups of hanging codes 202 are oppositely provided on the outer side walls of the two first box side panels 102, and the hanging codes 202 are perpendicular to the first box side panels 102, and the hanging codes 202 are oppositely arranged to the first flat steel 401.

[0036] The web height of the cross beam 602 is h1, the distance between two adjacent cross beams 602 is m, the web height of the longitudinal bone 603 is h2, the distance between two adjacent longitudinal bones 603 is n, the length of the box-shaped body 1 is a, the width is b, and the height is c, wherein a <m-500mm;b=n;c=h1-h2-30mm。

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ship deck vibration reduction device, characterized in that: The vibration reduction device comprises a box-shaped body, inside of which a vibration reduction object for adjusting weight is arranged, and the box-shaped body is detachably connected to the lower end surface of the deck.

2. A ship deck vibration reduction device according to claim 1, characterized in that: The deck includes a deck plate, a transverse beam installed on the deck plate along the ship width direction and downward in the plumb direction on the lower end surface of the deck plate, and a longitudinal bone installed on the deck plate along the ship length direction and downward in the plumb direction.

3. A ship deck vibration reduction device according to claim 2, characterized in that: The box-shaped body includes a bottom plate, a first box side plate vertically installed on the long side of the bottom plate, and a second box side plate vertically installed on the short side of the bottom plate. Two first L-shaped ear plates are fixed in a mirror-symmetrical manner at both ends of the length direction of the outer wall of the first box side plate on one side. Bolt holes and first bolts are provided at the upper ends of the two first L-shaped ear plates, and the upper ends of the two first L-shaped ear plates are inclined in directions away from each other; second L-shaped ear plates are fixed on one side of the two second box side plates away from the first box side plates provided with the first L-shaped ear plates, and the two second L-shaped ear plates are vertically arranged, and bolt holes and first bolts are provided on the upper parts of the second L-shaped ear plates; the upper ends of the first L-shaped ear plates and the second L-shaped ear plates are detachably connected to the longitudinal bones through the first bolts.

4. A ship deck vibration reduction device according to claim 1, characterized in that: The box-shaped body also includes a top cover and a plurality of baffles, wherein the top cover is horizontally placed inside the box-shaped body, and a plurality of groups of first flat steels perpendicular to the bottom plate are relatively arranged on the inner walls of the two first box side plates, and a plurality of second flat steels are installed on the inner wall of the bottom plate along the long side direction, and the plurality of second flat steels are respectively and perpendicularly connected to a group of relatively arranged first flat steels; the first flat steels are provided with a plurality of bolt holes at intervals from bottom to top, and bolt holes and second bolts are symmetrically provided at both ends of the plurality of baffles, the baffles are placed in the box-shaped body and above the top cover, and the two ends of the baffles are detachably connected to the two relatively arranged first flat steels by second bolts.

5. A ship deck vibration reduction device according to claim 4, characterized in that: The first flat steels are provided in two groups, and the two groups of first flat steels are located at two trisection positions of the first box body side plate along the long side direction.

6. A ship deck vibration reduction device according to claim 4, characterized in that: A plurality of sets of hanging brackets are arranged on the outer side walls of the two first box side panels in a relative manner, and the hanging brackets are perpendicular to the first box side panels.

7. A ship deck vibration reduction device according to claim 6, characterized in that: The hanging bracket is arranged opposite to the first flat steel.

8. A ship deck vibration reduction device according to claim 4, characterized in that: The distance between the outer peripheral side of the top cover and the inner wall of the box-shaped body is 1-2 mm, a notch is provided at the relative position between the top cover and the first flat steel, and the top cover and the first flat steel are embedded.

9. A ship deck vibration reduction device according to claim 3, characterized in that: The web height of the cross beam is h1, and the distance between two adjacent cross beams is m. The web height of the longitudinal bone is h2, and the distance between two adjacent longitudinal bones is n. The length of the box body is a, the width is b, and the height is c. <m-500mm;b=n;c=h1-h2-30mm。 10. A ship deck vibration reduction device according to claim 1, characterized in that: The vibration damping material is a particle material.

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