180results about "Hull bulkheads" patented technology

The invention belongs to the technical field of low-temperature liquid cargo storage, and particularly relates to an enclosure structure and an enclosure system at a dome corner area of a low-temperature liquefied gas storage tank, and the enclosure structure is arranged at the junction of a dome in the low-temperature liquefied gas storage tank, the top surface of a cabin and a front / rear bulkhead; comprising a corner insulation box connected to a corner, and a plane insulation box connected to a wall surface in the extension direction of the two ends; the corner area secondary-layer steel plate is attached to the inner side of the corner of the corner insulation box, and the corner area main-layer steel plate is welded to the inner side of the corner of the corner area secondary-layer steel plate through the connecting plate. The secondary shielding layer is attached to the surface of the insulation box and is welded with the corner area secondary layer steel plate; the main shielding layer is arranged on the inner side of the secondary shielding layer and is welded with the corner area main layer steel plate; and a supporting fixing plate is arranged between the two. Compared with the prior art, the problems that when an existing enclosure system structure is applied to the dome, stress is large, deformation is large, and structural stability is poor are solved. According to the scheme, the sealing performance and the use reliability of the low-temperature liquefied gas storage tank at the dome corner area are guaranteed.

The invention belongs to the technical field of ship construction, and discloses a bulkhead supporting structure and a ship. The bulkhead supporting structure is used for supporting a top plate, the top plate is used for bearing a groove-shaped bulkhead, the bulkhead supporting structure comprises a side vertical plate and a supporting assembly, the side vertical plate abuts against the top plate in the vertical direction, and the side vertical plate is arranged right opposite to a first panel of the groove-shaped bulkhead in the vertical direction; the supporting assembly comprises a supporting cross beam, the two ends, in the length direction, of the supporting cross beam are connected to the side walls of the ship body, the supporting cross beam abuts against the top plate in the vertical direction, and the supporting cross beam directly faces the second panel of the groove-shaped bulkhead in the vertical direction. The bulkhead supporting structure is only provided with the side vertical plate on one side, the upper groove-shaped bulkhead is powerfully supported, meanwhile, structural materials are reduced, the dead weight of a ship is reduced, meanwhile, the side vertical plate on the other side is omitted, the construction space and the cargo space are released, the construction environment is improved, and then the building efficiency of the ship is improved.

The invention relates to the field of ship manufacturing, in particular to an anti-collision bulkhead and a ship. A step structure is arranged on the upstream face of the anti-collision bulkhead and comprises at least one step. The transverse surface of at least one layer of step is a wave-shaped surface; in the direction parallel to the vertical face of the step, the outline of the wavy face is in a periodic waveform shape. According to the anti-collision bulkhead, the step structure is arranged on the anti-collision bulkhead, the transverse face of the step is arranged to be the wavy face, the principle of the Bragg resonance phenomenon in fluid mechanics is utilized, the wavy transverse face can interact with ocean waves to generate reflected waves, wave energy generated when the bulkhead is broken is effectively reduced, and therefore the anti-collision bulkhead can be used for preventing collision. Therefore, the impact force of ocean waves on the anti-collision bulkhead is weakened and relieved, and the ship can be better kept to continuously and stably sail.

The invention provides an arc-shaped reactor cabin corner shielding structure for a ship and a ship, the arc-shaped reactor cabin corner shielding structure is arranged in a frame type grillwork of a reactor cabin, the shielding structure is an arc-shaped structure formed by splicing layered and partitioned arc-shaped plates layer by layer, the radius R of each layer of arc-shaped plates is gradually increased from inside to outside, and the radius R of each layer of arc-shaped plates is larger than the radius R of each layer of arc-shaped plates. Comprising a shielding material A, fixing strip steel, a shielding material B, a shielding material C, angle steel and a cladding steel plate. The fixing steel bars are used for welding and fixing after the shielding material A is laid, and the unoccupied part of the layer is filled and leveled up with the shielding material B. The angle steel is used for welding and fixing after laying of the shielding material C; the covering steel plates are laid on the outer side of the stacking cabin structure and used for sealing the installation grids. According to the technical scheme, the problems of shielding integrity and light weight of the arc-shaped corner part of the reactor cabin in a nuclear power ship and a nuclear power floating platform can be solved, leakage of reactor radiation to the peripheral area is weakened to the maximum extent, and the radiation safety of personnel and equipment in the peripheral area is guaranteed.

The double-shell oil tank cabin wall structure comprises a cargo hold body and an isolation layer, the isolation layer comprises two plane bulkhead plates, a top plate, reinforcing toggle plates, a bottom plate, a ballast header pipe and a cargo oil header pipe, the two plane bulkhead plates are welded to the cargo hold body, and the top plate and the bottom plate are integrally welded to the plane bulkhead plates. The reinforcing bracket is located between the top plate and the bottom plate, the reinforcing bracket is welded to the two plane bulkhead plates, the ballast header pipe and the cargo oil header pipe are located between the bottom plate and the bottom face of an inner cavity of the cargo hold body, the double-shell oil tank cabin wall structure is mainly composed of the two plane bulkhead plates, and the two bulkheads are kept horizontal and serve as a ballast area; the two bulkheads are structurally reinforced through the reinforcing ribs, meanwhile, the reinforcing toggle plates are arranged between the bulkheads to increase the structural strength and resist deformation, the cargo oil header pipe, the ballast header pipe and the like are intensively arranged in the area to facilitate maintenance, the space in the cabin is saved, and maintenance and cabin flushing are facilitated.

The invention provides a marine right-angle edge-covered reactor cabin corner shielding structure and a ship, the shielding structure is arranged in a frame-type grillwork of a reactor cabin, the shielding structure is a square structure which is formed by layered and partitioned layer-by-layer splicing, and the shielding structure comprises a shielding body, a thin steel plate, angle steel and a cladding steel plate. The shielding structure is tightly attached to the wall of a reactor cabin and laid outwards layer by layer, and the shielding body sequentially comprises a first shielding material, a second shielding material, a third shielding material and a fourth shielding material from inside to outside. The outer side of the shielding body is coated and fixed with a thin steel plate, and is welded and fixed with a group of angle steel; a covering steel plate is laid on the outer side of the reactor cabin structure and used for sealing the installation grids and protecting shielding materials in the reactor cabin. According to the technical scheme, the problems of shielding integrity and light weight of the arc-shaped corner part of the reactor cabin in a nuclear power ship and a nuclear power floating platform can be solved, leakage of reactor radiation to the peripheral area is weakened to the maximum extent, and the radiation safety of personnel and equipment in the peripheral area is guaranteed.

The invention relates to a mounting method for a top deck section and a double-wall pipe of a fuel cabin of a dual-fuel container ship. The deck section is divided into a deck assembly, an A-area longitudinal bulkhead assembly, a B-area longitudinal bulkhead assembly and a C-area longitudinal bulkhead assembly; the deck assemblage and the C-area longitudinal bulkhead assemblage are separately constructed, and the A-area longitudinal bulkhead assemblage is integrally constructed when the deck assemblage is constructed; longitudinal bulkheads in the B area are assembled and manufactured in bulk; sand washing and coating are conducted; mounting the B-area longitudinal bulkhead assemblage in bulk under the inverted placement of the deck assemblage: respectively mounting four longitudinal bulkhead plates of the B-area longitudinal bulkhead assemblage on the deck assemblage, enabling a double-wall pipe to penetrate through the four longitudinal bulkhead plates of the B-area longitudinal bulkhead assemblage, and mounting rib plates among the four longitudinal bulkhead plates; and the C-area longitudinal bulkhead assemblage is carried on the B-area longitudinal bulkhead assemblage. According to the method, the deck is segmented and divided into different assemblies for construction, after sand washing and coating are conducted, the double-wall pipe is installed, and the assemblies are folded and carried, so that the double-wall pipe is prevented from being damaged.

The application provides a fall-preventing triangular profile structure and a mounting method. The triangular profile structure comprises a triangular cross-section structure formed by sequentially connecting a first side 1, a second side 2 and a third side 3; an angle alpha between the second side 2 and the third side 3 is 90-120 degrees; an angle beta between the first side 1 and the second side 2 is 30-60 degrees; the length of the third side 3 is less than the length of the first side 1; and an anti-skid structure is arranged on the bottom surface of the third side 3. The technical scheme can simplify the construction process, improve the operation flexibility, and save the construction cost.

A method and system for fumigating a vessel includes delivering a fumigation agent to a cargo area of ​​the vessel. In particular, the vessel may be a roll-on / roll-off vessel. In such a system, a pneumatic system is provided for maintaining a selected minimum pressure differential between a selected area of ​​the vessel above the cargo area and the cargo area such that the pressure in the selected area is greater than the cargo area. A control system may maintain the pressure differential.

The present invention belongs to the technical field of ships, and particularly relates to a design method for a curved bulkhead and a curved bulkhead. The design method for the curved bulkhead comprises the following steps: forming a bulkhead model with holes to be opened according to requirements, where the bulkhead model with holes to be opened is formed by rotating a quadrilateral ABCD around a rotation axis OO1 by an angle α; according to the hole-opening requirements, equally dividing the bulkhead model with holes to be opened into n regions with holes to be opened at intervals of (α / n) degrees. The regions with holes to be opened are provided with mounting holes that penetrate through the inner and outer surfaces of the bulkhead model with holes to be opened and have the same shape and size. The mounting holes and the regions with holes to be opened are similar figures. One mounting hole is provided in each region with holes to be opened. The upper surfaces of each mounting hole are on the same plane, the lower surfaces of each mounting hole are on the same plane, and the upper and lower surfaces of each mounting hole are respectively parallel to the plane ABA1B1; the target bulkhead is formed by opening mounting holes in the bulkhead model with holes to be opened. For the curved bulkhead provided by the present invention, the mounting holes have the same size and shape.

The utility model provides a prefabricated bulkhead plate which comprises a first bulkhead wall plate and a second bulkhead wall plate, an end limiting block is installed between the first bulkhead wall plate and the second bulkhead wall plate, a rivet is installed on the upper side of the end limiting block, a template is arranged on the side face of the first bulkhead wall plate and the side face of the second bulkhead wall plate, and the first bulkhead wall plate and the second bulkhead wall plate are connected through the rivet. Coil holes are formed in the upper portions of the mould plates, bottom connecting plates are arranged at the lower ends of the first cabin wall plate and the second cabin wall plate, waterproof pressing plates are arranged on the side faces of the bottom connecting plates, fixing plates are arranged on the upper sides of the first cabin wall plate and the second cabin wall plate, and supporting sheet metal parts are arranged on the side faces of the fixing plates. The stability of the supporting sheet metal part can be improved through the rivets, the first cabin body wall board and the second cabin body wall board can be fixed through the supporting sheet metal part, splicing and sealing between the wall boards are facilitated, and meanwhile the first cabin body wall board and the second cabin body wall board can be made into a double-layer heat preservation structure.

The invention belongs to a ship cabin structure in the technical field of ships. A ceramic wool layer is arranged on the deck (1) and comprises a framework plate (2) and ceramic wool (3), the framework plate (2) is provided with a plurality of framework plate holes (4) to form a honeycomb structure, the ceramic wool (3) is arranged in each framework plate hole (4) and covers the upper surface and the lower surface of the framework plate (4) at the same time, and a deck covering layer (5) is arranged on the upper surface of the ceramic wool layer. And a built-in enclosure bulkhead plate is arranged on the deck dressing layer (5). According to the ship cabin structure, the structure is simple, main vibration sources and noise isolation can be effectively achieved, silence and no vibration of the experiment cabin are achieved, the limitation of the arrangement position of the experiment cabin is small, an experiment can be conducted in the ship traveling period, and the requirement is met.

The embodiment of the utility model discloses a cross beam end connecting structure for a ship. The cross beam end connecting structure for the ship comprises a cross beam, a cross beam panel, a longitudinal wall plate, a reinforcing rib plate, a transverse bulkhead plate and a structural block. The cross beam is vertically arranged on one surface of the longitudinal wall plate; the transverse bulkhead plate is vertically arranged on the other surface of the longitudinal wall plate and corresponds to the cross beam; and the cross beam panel is vertically arranged on one surface of the longitudinal wall plate, is vertical to the cross beam and is arranged at the lower edge of the cross beam. According to the cross beam end connecting structure for the ship, the principle of separating shearing force from the maximum bending moment point is utilized, the insertion thickness and the plate thickness are greatly reduced by additionally arranging the structural blocks, meanwhile, the problem that the surface stress of the structure exceeds the standard balance is solved, and the safety and the economical efficiency of ship manufacturing are improved.

This invention discloses a support and reinforcement device for independent cargo holds, relating to the field of ship cargo hold technology. It includes a mounting base plate fixedly connected to the ship, two sliding brackets each with a cargo cover plate fixed to them, and a downward braking assembly for vertically locking a vertical sleeve fixed to a support column. A reinforcing arc plate is slidably mounted on the side of each cargo cover plate facing the mounting base plate. This invention uses two cargo cover plates and a support sleeve to form a cargo storage space. In extreme situations such as deck collapse, the protective top frame, supported by the support column and vertical sleeve, effectively protects the cargo cover plates. The drive slider in the retraction transmission assembly pushes against the tilting frame, causing the two tilting frames to slide towards each other and pull the two cargo cover plates together. This space contraction reduces the internal volume, significantly improving the pressure resistance of the cargo cover plates and ensuring effective protection of the cargo.

The invention discloses a multiple buffering anti-impact noise reduction structure for icebreaker bulkheads, comprising two sandwich panels for noise reduction and an anti-impact structure arranged between the two sandwich panels; the anti-impact structure comprises a load-bearing curved plate, a first buffering and resetting structure, a load-bearing buffering support structure, a second buffering and resetting structure and a load-bearing base, the load-bearing and buffering support structure comprises a buffering connecting plate, a compression sleeve connected to the load-bearing panel is arranged at the upper end of the buffering connecting plate, a guide column is arranged at the lower end, and a resetting elastic element connected to the lower sandwich panel is arranged on the guide column; the two ends of the first buffering and resetting structure are respectively pivotally connected to the load-bearing panel and the buffering connecting plate, and the two ends of the second buffering and resetting structure are respectively pivotally connected to the buffering connecting plate and the load-bearing base. The structure can accept the impact force from the outside in a large area and in multiple directions while reducing noise, and effectively alleviate the impact force through multiple shock-absorbing and buffering protective barriers; the structure is reasonable and easy to manufacture, install and maintain.

The invention discloses a connecting structure for a girder and a vertical aggregate of a ship body respectively positioned on two sides of a bulkhead, which comprises a bulkhead structure, the girder is fixedly arranged on the front surface of the bulkhead structure, and a first vertical aggregate and a second vertical aggregate are fixedly arranged on the back surface of the bulkhead structure; the girder is interrupted at the bulkhead structure; a panel of the girder is provided with a panel amplification end, and the panel amplification end is fixedly connected to the bulkhead structure; the width of the enlarged end of the panel is greater than that of the panel of the girder; the web part of the first vertical aggregate is aligned with the web of the girder; a reverse reinforcing plate is fixedly arranged on the back surface of the bulkhead structure; the reverse reinforcing plate is arranged between the two second vertical aggregates; the reverse reinforcing plate is flush with the panel of the girder; no toggle plate is arranged between the girder and the first vertical aggregate. According to the invention, the space below the girder can be fully utilized and is used for arranging equipment such as a ventilation pipe system and a cable.

This invention provides a high-efficiency ship cabin bulkhead panel, relating to the technical field of ship cabin bulkhead panels, comprising: a combined bulkhead panel and a combined locking component; the combined bulkhead panel consists of an adjustable bulkhead panel A and an adjustable bulkhead panel B, with adjustable bulkhead panel A connected to adjustable bulkhead panel B, and both ends of the combined bulkhead panel connected to two adjacent combined bulkhead panels; a rotating locking block is installed inside the adjustable bulkhead panel B, the rotating locking block being connected to the adjustable bulkhead panel A, and square grooves are provided at both ends of the rotating locking block, located on the outside of the adjustable bulkhead panel B. This invention allows for adjustment of the connection between the adjustable bulkhead panel A and the adjustable bulkhead panel B according to different cabin specifications, changing the width of the combined bulkhead panel itself, thus better adapting to the installation and use requirements of cabins of different specifications. It solves the problem that existing ship cabin bulkhead panels mostly adopt an integrated design, requiring custom-made dimensions and unable to be adaptively adjusted according to different cabin specifications, resulting in limitations in use.

The present invention relates to a container ship cargo hold capable of loading and unloading cargo under a superstructure, and relates to the technical field of cabin layout design of container ships, including a cargo hold, a watertight transverse bulkhead, a supporting transverse bulkhead, a main deck, a superstructure, a container trolley and a container transfer device; watertight transverse bulkheads are arranged at the front and rear of the cargo hold, a supporting transverse bulkhead is arranged in the middle, and containers can be loaded inside; the front half of the cargo hold is in a large opening form, the rear half is arranged with a main deck, and a superstructure is arranged on the main deck; a container trolley is arranged at the bottom of the cargo hold, and a container transfer device is arranged under the main deck, and the container trolley and the container transfer device cooperate to realize the loading of containers in the hull space under the superstructure. The present invention can realize the loading of containers in the hull space under the superstructure through the coordinated use of the container trolley and the container transfer device, which is beneficial to improving the utilization rate of the hull space, increasing the loading capacity of the container ship, and making the ship type more economical.

A methods and systems of fumigating a vessel include delivering fumigant to a cargo area of the vessel. In particular, the vessel may be a roll-on / roll-off vessel. In such a system, an air pressure system is provided for maintaining a selected minimum pressure differential between a selected area of the vessel above the cargo area and the cargo area, such that pressure of the selected area is greater than the cargo area. A control system may maintain the pressure differential.

The invention provides a design and manufacturing construction method of an anti-instability arc-shaped wall plate of a liquid tank, and belongs to the technical field of marine industry. The design method of the anti-instability liquid tank arc-shaped wall plate comprises the steps that a simulation model of the anti-instability liquid tank arc-shaped wall plate is constructed firstly, then simulation evaluation is conducted on the bearing capacity of the constructed simulation model, the bearing capacity of the simulation model is analyzed, and the anti-instability liquid tank arc-shaped wall plate is an arc-shaped bulkhead with curvature instead of a flat bulkhead. The concave face of the arc-shaped bulkhead bears pressure, and the arc-shaped bulkhead is welded to a hull plate. The manufacturing construction method of the anti-instability arc-shaped wall plate of the liquid tank comprises a preliminary forming process and process, a subsequent welding process and process and a surface and overall treatment process and process. The problems that a traditional liquid tank wall plate structure is prone to losing stability, and additional weight needs to be increased when rigidity is increased are solved, the defects existing in traditional design are overcome, and the stability and safety in the taking process of liquid in a tank are improved.

The invention relates to the technical field of ship vibration and noise reduction, in particular to a detachable ship corridor area wall plate and bulkhead elastic connecting structure and a mounting and dismounting method. The detachable ship corridor area wall plate and bulkhead elastic connecting structure is provided with a bulkhead, a wall plate and a ceiling, the side face of the bulkhead is connected with the wall plate through an elastic noise reduction assembly, and the ceiling is connected with the upper end of the wall plate; the elastic noise reduction assembly comprises an upper elastic clamping piece, a lower elastic clamping piece, a supporting cushion block and a supporting plate, each of the upper elastic clamping piece and the lower elastic clamping piece comprises a connecting block, a wedge-shaped rubber pad and a connecting bent plate, and the wedge-shaped rubber pad of the upper elastic clamping piece is clamped on the wedge-shaped rubber pad of the lower elastic clamping piece. The device has the advantages of being simple in structure, good in noise reduction effect, capable of improving the comfort level of a ship cabin, good in working environment, beneficial to physical and psychological health of sailors and passengers and the like.

The invention relates to a vibration reduction and isolation bulkhead structure of an underwater vehicle and a design method thereof, the vibration reduction and isolation bulkhead structure comprises a bulkhead main body panel, the bulkhead main body panel comprises an equipment mounting part, a core adjacent equipment part, a middle transition part and a peripheral vehicle connecting part which are arranged from inside to outside; the inner ring vibration-resistant ring is arranged between the core adjacent equipment part and the middle transition part; the outer ring vibration damping ring is arranged between the middle transition part and the peripheral aircraft connecting part; the inner groove of the inner ring vibration-resistant ring and the inner ring rotating groove form an inner ring integral rotating groove, and the inner groove of the outer ring vibration-resistant ring and the outer ring rotating groove form an outer ring integral rotating groove; a sleeve chain type vibration isolation ring is fixed in the inner ring integral rotating groove and the outer ring integral rotating groove; composite damping materials are laid on the surfaces of the sides, away from the inner ring rotating groove and the outer ring rotating groove, of the core adjacent equipment part and the middle transition part. According to the invention, underwater radiation noise generated by operation of mechanical equipment mounted on the bulkhead can be greatly reduced.

The present invention relates to the field of ship processing, and specifically discloses a connection structure at the position of a sectional joint, including a first joint deck. A second joint deck is arranged on one side of the first joint deck. A bulkhead is installed on the lower surface of the first joint deck. A side stiffener is arranged on the side of the bulkhead close to the transverse stiffener. A triangular bracket is arranged between the side stiffener and the transverse stiffener. A hemmed opening is formed at the connection between the triangular bracket and the transverse stiffener. The side stiffener is cancelled in the first joint deck, simplifying the structural form, making it more convenient for the processing and manufacturing of the section, reducing the welding workload. The end of the transverse stiffener in the second joint deck is no longer aligned with the sectional joint, reducing the welding workload during the closing process. Through the deformation processing within the effective range of the hemmed triangular bracket for welding, the bulkhead stiffener and the deck stiffener are connected, improving the efficiency of on-site closing welding.

This application relates to a corrugated plate and a method for arranging corrugated units in an LNG carrier cargo containment system. The corrugated plate is formed by staggered splicing of multiple identical corrugated units with corrugated protrusions. The bottom surfaces of any two adjacent corrugated units are not aligned on a continuous straight line, and there is a blank area without corrugated protrusions between any two non-adjacent corrugated units. This application avoids the design limitations of traditional corrugated unit arrangement methods, allowing for more choices and optimization of the corrugated unit's form. The edges with the weakest tensile strength of the corrugated units are not aligned on a continuous straight line, thus avoiding the concentration of cold contraction stress along a continuous straight line.

The invention belongs to the technical field of ship parts, and discloses a fireproof through device and a ship. The fireproof through device comprises an installation pipe mechanism, an installation mechanism, a circulation mechanism and an elastic mechanism. The installation pipe mechanism is arranged in a through hole of a fire-resistant partition bulkhead of the ship in a penetrating mode, and the installation mechanism is connected between the peripheral side portion of the installation pipe mechanism and the fire-resistant partition bulkhead. The circulation mechanism penetrates through the mounting pipe mechanism and is configured to allow a heat source pipe system to penetrate through, and the two ends of the circulation mechanism can be connected to the parts, located on the two sides of the fireproof partition bulkhead, of the heat source pipe system respectively. The elastic mechanism is arranged between the installation pipe mechanism and the circulation mechanism, the circulation mechanism can be stretched or compressed in the axis direction, and the elastic mechanism can stretch out and draw back in the axis direction of the circulation mechanism. The fireproof through device can achieve the effects of heat insulation, vibration prevention and noise reduction when the heat source pipe system passes through the fireproof partition.

The present invention relates to a corrugated bulkhead with variable groove spacing, wherein at least one of the upper or lower sides of the corrugated bulkhead is provided with a pillar; the conventional corrugated width of the corrugated bulkhead is s; then, a first special corrugation with a spacing of L1 is provided on both sides with the position of the corrugated bulkhead directly facing the pillar as the center; at the edge of the bulkhead plate that is not entirely or partially connected to the longitudinal bulkhead and the side plate, the corrugation of the edge support steel is set to a second special corrugation with a spacing of L2; the corrugation adjacent to the second special corrugation is set to a third special corrugation with a spacing of L3; L2<L1<S, and L2<L3<S. The present invention can effectively improve the buckling and excessive buckling deformation problems of the free edge or the area with large pressure on the corrugated bulkhead, and ensure the safety of the ship structure.

The present invention relates to a flow guiding structure on the aluminum alloy outer wall of a ship, belonging to the technical field of ship design and manufacturing. The flow guiding structure includes a flow guiding profile that is arranged at the bottom of the aluminum alloy outer wall plate and above the steel-aluminum composite joint for collecting and guiding condensed water; a plurality of flow guiding profiles are connected front and back and then connected to the ship's downcomer. The flow guiding structure provided by the present invention is used to prevent the side cabin of the aluminum alloy superstructure from generating an electrochemical reaction when the condensed water that may be generated on the inner side of the outer wall flows to the steel-aluminum composite joint at the lower end of the outer wall due to the temperature difference inside and outside, corroding the composite joint and the aluminum alloy outer wall; the flow guiding structure can also improve the structural stiffness at the bottom of the outer wall and serve as a pipe support bracket. The present invention protects the safety of the aluminum alloy outer wall of the superstructure and the steel-aluminum composite joint, takes into account aesthetics, and has a certain maintenance and preservation function for the pipe system and interior fitting.

The utility model relates to a yacht bulkhead and bulkhead bottom connecting structure which comprises a bulkhead and a bulkhead bottom, the bottom of the bulkhead is welded and fixed on the top surface of the bulkhead bottom, and a first L-shaped plate, a second L-shaped plate and a third L-shaped plate are sequentially welded on connecting corners on two sides between the bulkhead and the bulkhead bottom from inside to outside. According to the connecting structure for the cabin wall and the cabin bottom of the yacht, by increasing the inertia moment of the cross section, the bending resistance and the shearing resistance of the area are remarkably improved. Local stress is dispersed into a bulkhead and a bulkhead bottom structure in a larger range through the L-shaped plates, and fatigue cracks or deformation caused by single-point overload is avoided.

The invention relates to the technical field of cabins, and discloses a bottom side tank structure of a bulk cargo ship, which comprises a ship bottom plate, a plurality of groups of grooves are formed in two sides of the interior of the ship bottom plate, damping clamping pieces are inserted into inner cavities of the grooves, and a plurality of groups of first reinforcing assemblies are inserted into the plurality of groups of damping clamping pieces together; compared with the prior art, the damping device has the advantages that the designed damping clamping pieces and the rib plates are connected in an inserted and welded mode, damping protection is effectively conducted on the rib plates, the rib plates are provided with large holes, the stress condition of the positions of the round holes is better, stress is relatively more uniform, and the damping effect is better. The structure is safer, weight reduction of a ship structure is facilitated, so that the cost of a ship is reduced, the rib plates are quickly inserted, fixed and assembled, then interval measurement, positioning and installation are performed, the assembling efficiency is effectively improved, the working difficulty of assembling is reduced, the rib plates are effectively fixed in an anti-inclination manner, and the strength of the whole bottom side tank is improved.

The embodiment of the invention discloses a piezoelectric stack clamping device for active vibration reduction of a bulkhead, relates to the technical field of structural vibration control, and can implement faster active control on the vibration response of the bulkhead on the premise that the structure is simple and the stability is high. The device is characterized in that a pair of bases are installed on the bulkhead in a non-punching mode, and the size and the shape of the bottom of each base are matched with the size and the shape of the bulkhead; one end of the piezoelectric stack actuator is fixedly connected with a base of the clamping device through a bearing seat, and the other end of the piezoelectric stack actuator is in threaded connection with the flexible hinge; the flexible hinge is fixedly connected to the inner side of the other base; the piezoelectric stack actuator serves as a source of excitation force, excitation voltage generates displacement response after being input into the piezoelectric stack actuator, the displacement response is transmitted to the clamping device through the flexible hinge, the displacement response is converted into the excitation force under the limitation of the clamping device, and therefore a pair of force which is equal in magnitude and opposite in direction is output to the base, and excitation is formed.