593 results about "Hull structure" patented technology

A whole ship strain field rapid reconstruction method using ship motion and discrete strain information can rapidly reconstruct a whole ship structure strain field through fusion analysis of ship motion information and finite discrete strain monitoring data, and provides a more reliable reference basis for ship structure safety assessment and auxiliary decision making. The method comprises the following steps: firstly, acquiring ship motion monitoring data, and establishing a wave time-frequency parameter inversion Kalman filtering model based on ship motion information; secondly, according to the wave height obtained through inversion, the wave pressure load on the surface of the ship body is solved by combining phase parameters and relative positions of the wave surface and the ship body; thirdly, establishing a whole ship structure strain field dynamic reconstruction artificial intelligence model fused with a physical information neural network-finite element method, and formulating a layout strategy of measuring points; and finally, performing network parameter optimization on the PINN-FEM strain field reconstruction model by using strain monitoring data of finite discrete measurement points, and improving the overall calculation precision of the model.

The invention provides a production method of 440MPa-grade normalized high-strength structural steel for a ship body, and belongs to the field of ship body structural steel manufacturing, the production process route of the steel comprises smelting, die casting, rolling, rapid cooling, finishing, normalizing and tempering, the thickness of a produced steel plate is 8-20mm, and the steel comprises the following chemical components in percentage by mass: 0.06-0.10% of C; si: less than or equal to 0.40%; mn is equal to 0.90%-1.20%; less than or equal to 0.015% of P; s: < = 0.005%; the ratio of Ni to Cr is (0.90%-1.30%): (0.50%-0.65%); v is equal to 0.030 percent to 0.050 percent; cu is equal to 0.15%-0.35%; n is less than or equal to 0.0040%, and the balance is Fe and inevitable impurities. The microstructure of the steel is a bainite tempered structure and ferrite, and the average grain size of the ferrite is smaller than or equal to 10 micrometers. The yield strength of the steel is larger than or equal to 440 MPa, the tensile strength is larger than or equal to 600 MPa, the yield ratio is smaller than or equal to 0.75, the impact absorbing energy at the temperature of 60 DEG C below zero is larger than or equal to 200 J, the ductile-brittle transition temperature is not higher than 80 DEG C below zero, and a product has good corrosion resistance.

The invention discloses a method for replacing a ship rudder horn, which comprises the following steps of: measuring rudder blade gap data, measuring old rudder horn data as an original record, so that a new rudder horn is measured and compared again after being installed, and a center line of a guyed rudder system is established; hoisting a new rudder horn in place, adjusting the position of the rudder horn by taking the center line of the steering engine as a reference, assembling the new rudder horn and a ship body structure together, symmetrically welding, and performing ultrasonic flaw detection and magnetic powder flaw detection on a welding seam; boring the new rudder horn by taking the center line of the guyed rudder system as a reference; and a rudderstock lower cloth and a rudder pintle cloth of the rudder horn are machined, and the steering engine, the rudder blade, the rudderstock and the rudder pintle are installed back. According to the replacement method of the ship rudder horn, the parameters of the old rudder horn are collected to serve as the positioning parameters of the new rudder horn, accurate replacement of the rudder horn can be achieved, accurate folding of the replaced new rudder horn and the ship body is facilitated, and the installation accuracy of the rudder horn can be improved by establishing the center line of the guyed rudder system.

The invention provides an underwater explosion hull local structure damage assessment method, and relates to the technical field of data processing. The method comprises the following steps: acquiring underwater explosion working condition parameters, wherein the working condition parameters comprise a charge TNT equivalent and an explosion position; obtaining hull structure data; according to the working condition parameters and the ship body structure data, based on an equivalent simulation method, the initial damage degree of the ship body under the underwater explosion effect is calculated; determining the ship body area with the initial damage degree greater than the preset damage degree as a key local area; and according to the working condition parameters and the structural data of the key local area, the accurate damage degree of the key local area of the ship body under the underwater explosion effect is calculated based on a finite element analysis method. According to the method, fine finite element analysis can be carried out on a key local area with a large initial damage degree, the fine and accuracy of local structure damage evaluation are improved, simulation does not need to be carried out on the whole ship body every time, and the complexity and time consumption of simulation are reduced.

The invention discloses a steel structure welding device and method for hull structure construction, and particularly relates to the technical field of welding, the steel structure welding device for hull structure construction comprises a walking unit and an annular outer gear ring, the annular outer gear ring is concentrically arranged outside the walking unit in a sleeving mode to complete welding guiding, and a welding arm is movably arranged on the annular outer gear ring. Following switching of the welding unit and the processing unit is completed through dynamic sensing of the sensing mechanism, so that the welding unit and the processing unit can rapidly move to the preset position of a machining area, repeated debugging is avoided, meanwhile, the purification mechanism can complete active limitation at the limiting position in the switching process of the welding unit and the processing unit, and the welding efficiency is improved. And by means of the design of the control piece, follow-up opening and closing can be completed with the welding unit and the processing unit, the purification precision is guaranteed, meanwhile, the processing unit in the running state can complete the active cleaning action of the processing unit, and the good cleaning state is guaranteed.

The invention relates to a wind power equipment installation transport ship structure design method, and belongs to the technical field of ship and ocean engineering, a continuous middle longitudinal wall is arranged between an operation deck and an outer plate, an inner wall and the middle longitudinal wall are determined according to the size of a pile leg, and a main deck, an inner bottom, the outer plate and the middle longitudinal wall are of a continuous structure and bear the total longitudinal strength; the local platform and the inner wall are of a local structure and do not bear the total longitudinal strength. A cabin defined by the main deck and the inner bottom is a cargo hold, the cargo hold is of a full-through structure from the bow to the tail of the ship body, the ship is of a ship body structure with discontinuous structural strength in the transverse direction, and the discontinuous strength comprises a structure without a transverse bulkhead, a supporting column and a typical strong frame. The ship width is greatly optimized, so that the structural stress level under the torque effect is reduced, a feasible scheme is provided for the design of a transverse bulkhead-free structure of the ship, and due to the implementation of the transverse bulkhead-free structure design, it can be guaranteed that the pile legs are stored in a cargo hold, and transportation is convenient.

The invention provides a water surface cleaning unmanned ship assisted by an unmanned aerial vehicle to perceive and an operation method thereof, the unmanned ship adopts a double-ship-body structure, and a sensor module, a controller module, a data transmission module, a power supply module and an execution module are arranged on a ship body. And the unmanned ship receives a two-dimensional grid map obtained by executing the SLAM mapping task by the unmanned aerial vehicle and junk information identified by the unmanned aerial vehicle through the data transmission module. And the controller module plans a floating garbage cleaning task according to the received information. Further, the unmanned ship uses a sensor module to perform secondary identification on the garbage preliminarily identified by the unmanned aerial vehicle, and dynamically corrects the predetermined route in combination with the real-time environment information. The application condition of the unmanned water surface garbage cleaning ship is improved, and the problem that an existing garbage cleaning ship is not high in detection and cleaning precision is effectively solved.

The utility model discloses a marine lean leveling tool for segmented welding. The marine lean leveling tool comprises a flat-bulb steel leveling device, a T-shaped profile leveling device and an angle steel leveling device, the three devices are optimized, so that the use is more convenient, the original limitation is overcome, and the requirements of an actual production field are met; the three devices achieve leveling and butt joint of steel plates such as flat-bulb steel, T-shaped profiles and angle steel on a ship body, plate stacking and folding are omitted, steel structures in the steel plates are not damaged, base metal is protected, operation is easy, a large number of welding materials and polishing working hours are saved, working efficiency is improved, and the working environment of workers is improved; the tool is long in service life and convenient to disassemble and maintain, the work efficiency is improved, the hull structure is effectively protected, and all leveling work can be completed through single-person operation.

The invention provides a greedy algorithm-based unreinforced hull plate inverse finite element measuring point optimal arrangement method, and belongs to the field of ship structure health monitoring. The problem that it is difficult to reduce the number of arranged measuring points under the condition that the required reconstruction precision is kept is solved. The method comprises the steps that discretization processing is conducted on an unreinforced hull plate, and the unreinforced hull plate is divided into four-node units meeting preset conditions; generating a primarily selected measuring point scheme, namely arranging measuring points along the diagonal direction of a ship body plate, and performing array copying and segmented movement to obtain a plurality of initial measuring point arrangement schemes; and inputting the primarily selected measuring point scheme into a greedy algorithm, performing cyclic displacement reconstruction and node error calculation in combination with an inverse finite element method, iteratively removing the measuring point which has the minimum influence on the reconstruction error until all unit errors meet a preset precision threshold value, and outputting an optimized arrangement scheme which has the minimum number of measuring points and meets the precision requirement. The method is mainly used for hull structure safety assessment in the whole life cycle.

A marine anti-pirate grille comprises grille bodies, the grille bodies are located below an inclined ladder and continuously arranged in the length direction of the inclined ladder, one end of each grille body is connected with a hull structure at the top end of the inclined ladder through a fixed steering device, and the other end of each grille body is connected with a hull structure at the bottom end of the inclined ladder through a locking device. The fixed steering device is composed of a bottom eye plate and a U-shaped steering ring, the bottom eye plate is fixed to a ship body structure, water retaining flat steel is arranged around the inclined ladder, the water retaining flat steel at the bottom of the inclined ladder is arranged on the side, away from the inclined ladder, of the bottom eye plate, the U-shaped steering ring is arranged in an inverted buckling mode and covers the water retaining flat steel, one end of the U-shaped steering ring is hinged to the bottom eye plate, and the other end of the U-shaped steering ring is hinged to the inclined ladder. And the other end is integrally connected with the grille main body frame. According to the anti-pirate grille, the anti-pirate grille body and the fixed steering device are connected in a protruding mode, the grille locking device adopts an anti-theft component, the possibility that pirates open bolt components of all parts of the anti-pirate grille is avoided, and the reliability and safety of the overall structure of the anti-pirate grille are greatly improved.

The invention provides a ship service platform. The ship service platform comprises a deck, a supporting frame and a plurality of connecting pieces. The deck is laid on a hull frame structure of a ship; the supporting frame is provided with a transformer base platform frame and a frequency conversion equipment base platform frame, and the transformer base platform frame and the frequency conversion equipment base platform frame are arranged at the bottom of the deck and support corresponding areas on the deck; and the connecting piece is used for connecting the transformer base platform frame and the frequency conversion equipment base platform frame and connecting the ship body frame structure. The supporting frame is additionally arranged through the transformer base platform frame and the frequency conversion equipment base platform frame, the influence of vibration on the whole ship body structure is reduced, further caused damage is reduced, and the technical problem that in the prior art, a part of equipment is lacked for reducing damage to a ship body deck and reducing damage to a deck structure is solved.

The invention discloses an efficient binding method of a standard container for ship transportation, which comprises a ship body provided with a plurality of mooring holes and binding parts, and comprises the following steps: arranging a matrix according to the mooring holes on the ship body, the layer height of a loading cabin and the permissible range of the mooring force of a mooring rigging; the single-layer number, the arrangement mode and the stacking layer number of the container units are determined; stacking a plurality of standard containers in a longitudinal and transverse array manner according to the determined number and layer number, and fixing to form a container unit; and the four corners of the standard container on the upper layer of the container unit are bound in a matched mode through mooring holes and binding pieces in the ship body. A plurality of 1t standard containers can be bound at a time, and the ship loading space is fully utilized; the heap cone for positioning and supporting the bottom layer container is not welded with the hull deck, and the hull deck does not need to be holed, thereby facilitating the integrity of the hull structure; and the standard container or the container unit is bound and tied by using the original mooring rigging and the mooring hole of the ship, so that the refitting cost is reduced.

The invention relates to a slamming strength evaluation method for a duct fin at the tail of a ship, which comprises the following steps of: (1) establishing finite element models of the duct fin and an adjacent ship body structure, and setting boundary conditions; (2) selecting the lower surface of the upper region of the conduit and the lower surface of the fin as slamming pressure acting surfaces, and calculating a slamming pressure peak value of each point; (3) applying slamming pressure to the finite element model, and applying a slamming pressure peak value as a static load to a plurality of local areas of the conduit and the fin to generate different loading conditions; and (4) calculating the structure response, evaluating the Von Mises stress of the plate shell unit and the axial stress of the rod unit, and judging whether the Von Mises stress and the axial stress meet the allowable stress related to the grid size or not. Compared with a method for calculating the slamming load based on CFD, the slamming strength evaluation method has the advantages that the calculation efficiency is extremely high, and the slamming strength of the conduit fin can be quickly evaluated in a short time; the method is more suitable for slamming pressure calculation of the tail conduit fin, and the considered loading mode is more comprehensive.

The utility model relates to the technical field of pipeline installation, in particular to a heat insulation type pipeline cabin penetration framework which comprises a cabin wall, a cooling assembly and an installation assembly, a casing pipe is arranged on the cabin wall, a high-temperature pipeline is arranged in the casing pipe, the high-temperature pipeline penetrates through the casing pipe, the casing pipe is provided with the cooling assembly corresponding to the high-temperature pipeline, and the casing pipe is provided with a fixing plate. A connecting plate is arranged on the high-temperature pipeline, and the rear end of the connecting plate is attached to the fixing plate. When the device is used, the motor is started to drive the rotating shaft and the first gear to rotate, the first gear drives the first gear ring to rotate, the first gear ring drives the second gears to rotate, and the second gears drive the rotating rod and the fan blades to rotate, so that the speed of air between the sleeve and the high-temperature pipeline is increased conveniently; cooling between the sleeve and the high-temperature pipeline is facilitated, heat of the high-temperature pipeline is prevented from being transmitted to a hull structure, and the heat insulation effect between the high-temperature pipeline and the hull bulkhead is improved.

The invention discloses a ship independent liquid cargo tank traction floating stopping mechanism and a supporting system. According to the traction floating stopping mechanism and the supporting system, the traction floating stopping mechanism (6) is arranged between the inner bottom of a main hull structure (1) and the bottom of an independent liquid cargo tank (2), and the traction floating stopping mechanism can form downward traction on the independent liquid cargo tank based on the main hull structure; the traction floating stopping mechanism comprises two rope fixing seats (61) and a traction rope (62), the two rope fixing seats are fixedly arranged at the inner bottom of the main ship body structure and the bottom of the independent liquid cargo tank respectively, and the two ends of the traction rope are assembled and connected with the two rope fixing seats respectively; the supporting system comprises the traction floating stopping mechanisms, and the multiple traction floating stopping mechanisms are evenly and discretely arranged. When the main hull structure is damaged, water enters the independent liquid cargo tank, and the independent liquid cargo tank begins to float upwards, the independent liquid cargo tank cannot float upwards and collide with the main hull structure under the traction action of the traction floating stopping mechanism.

The invention belongs to the technical field of ship body structure health monitoring, and provides a ship body structure health monitoring method based on digital twinning, which comprises the following steps: S1, acquiring multi-dimensional data such as stress, strain, vibration and temperature of a ship body structure in real time by using various sensors arranged on the ship body structure; s2, on the basis of the collected historical data, combining a physical model, material attributes and manufacturing process information of the ship body structure, constructing a digital twin body of the ship body structure; s3, performing feature extraction on the data acquired in real time; according to the invention, the multi-dimensional data of the hull structure is collected in real time and the digital twinborn body is constructed, so that comprehensive and real-time monitoring and accurate evaluation of the hull structure are realized; according to the method, abnormal data in the ship body structure can be found in time, the future health state of the ship body structure can be predicted, powerful support is provided for maintenance and reinforcement decisions, early warning can be conducted in time when the health state is abnormal, the safety and reliability of the ship are effectively improved, and the maintenance cost is reduced.

The embodiments of the present disclosure provide a method for mounting a membrane-type containment system carrying cryogenic liquid cargo. A membrane-type containment system comprises a primary membrane layer, fastening engagement plates, a primary insulation layer, a secondary membrane layer and a secondary insulation layer, which are sequentially connected and fixed to a hull structure by means of penetrating fasteners, wherein the primary membrane layer, the primary insulation layer, the secondary membrane layer and the secondary insulation layer enclose to form a cryogenic liquid cargo storage tank for containing an ultra-low-temperature medium. In a planar area, the method comprises: mounting spacer plates on a bulkhead of the hull structure according to set marked lines, and mounting secondary insulation modules on the spacer plates; performing fixation by means of the penetrating fasteners; after mounting is completed, mounting the secondary membrane layer and primary insulation modules in sequence; then mounting each fastening engagement plate disposed above a gap formed by two adjacent primary insulation modules; and mounting the primary membrane layer, wherein the boundary of each primary membrane is welded and fixed to fixing welding plates and sealing metal pieces provided on the fastening engagement plates disposed on the primary insulation modules.

The invention provides a ship equipment base modeling method and a ship, and relates to the field of ship manufacturing, and the ship equipment base modeling method comprises the following steps: creating a universal base template, and creating an equipment model; a base structure form is supplemented on the basis of the universal base template, and a virtual universal base model is created and put into a base model library so as to be convenient to call; and reading the installation interface and weight information of the equipment, calling the virtual universal base model, and generating an equipment virtual base model under the structure tree of the equipment model. Arranging the equipment virtual base model and the equipment model on the whole ship body structure; and according to the final arrangement position of the equipment model, the equipment virtual base model identifies the boundary of the hull structure, matches the corresponding plate thickness and material, and automatically converts the equipment virtual base model into an entity base model. According to the method, rapid generation of the equipment base model can be achieved, it is guaranteed that the technical state consistency of the bases of equipment of the same specification is adjusted adaptively after the whole ship is arranged for multiple times, and the base modification efficiency is improved.

The invention provides an unmanned ship grabbing and positioning system based on multi-body configuration design, and belongs to the technical field of unmanned ships, the unmanned ship grabbing and positioning system comprises a multi-body ship body, a machine vision module, a positioning calculation unit, a stable platform, a grabbing device and a control module, the multi-body ship body is composed of a double-hull structure or a three-hull structure; the machine vision module is used for identifying a target object and acquiring visual information of the target object; the positioning calculation unit is connected with the machine vision module and is used for calculating spatial position coordinates of the target object according to the acquired vision information; the stable platform is arranged on the multi-hull ship body; the grabbing device is installed on the stable platform and used for grabbing the target object according to the coordinates calculated by the positioning calculation unit. The robot has the comprehensive advantages of being high in environmental adaptability, high in positioning precision, flexible in operation, good in controllability, high in maintainability and the like, and can efficiently cope with target object grabbing operation in the complex water environment.

The invention relates to a large-scale crane boom hinge point construction process. The process comprises the following steps: step 1, pretreatment and rough machining of a hinge point seat lug plate; 2, splicing and welding hinge point seat lug plates; step 3, segmented manufacturing and construction precision control of the hinge point seat; step 4, controlling the construction precision of the ship body sections at the positions of the hinge point seats; 5, hull center line marking and hull closure construction precision control at the hinge point seat position are carried out; sixthly, hinge point bases are assembled, installed and welded in a segmented mode; 7, hinge point seat closure opening bulk parts are installed and welded; 8, machining the hinge point seat; in the building process, the hinge point seat and the ship body structure are synchronously manufactured in a segmented mode, the hinge point seat is integrally installed in a segmented mode, the amount of bulk objects on site is reduced, the construction efficiency is improved, the total building period is shortened by 30 days, and the construction cost is reduced by conducting refined precision control over the building and folding welding procedures. The deviation of the installed hinge point seat can be controlled within 4 mm, and the machining requirement is met.

The invention relates to a sharp-included-angle hull optimization design method and a ship, a narrow space of a sharp-included-angle structure is optimized, a deck structure extends to the position close to the narrow space of the sharp-included-angle structure in the direction of a ship linear outward-floating outer plate to be provided with a cut-off end point, and a short beam structure is arranged below the cut-off end point of the deck structure for supporting; a transverse reinforcing toggle plate is arranged on the side, close to the edge of the ship linear floating outer plate, of the short beam structure, a panel is arranged above the transverse reinforcing toggle plate, the panel covers the transverse reinforcing toggle plate, and the panel extends towards the edge of the ship linear floating outer plate along the short beam structure from the position below a cut-off end point. The deck structure is cut off in advance, the deck structure does not extend to the edge of the ship linear floating outer plate any more, the deck structure is supported through the short beam structure, and the problems that construction is inconvenient and stress is concentrated due to the fact that the deck structure extends to the edge of the ship linear floating outer plate are solved.

The invention belongs to the technical field of ships, and discloses a steering engine system installation method which comprises the following steps that a steering engine room is inverted, a steering engine platform is located above an operation area, and a rudder hole is perpendicular to the operation area; hoisting the rudder stock and loading the rudder stock into the rudder hole; the steering engine is placed on a rest stand above the steering engine base and located above the rudderstock; the rudderstock is moved until the lower end of the rudderstock is located below the upper rudder twist and above the lower rudder twist, and then the rudder blade is installed at the lower end of the rudderstock; the steering engine is lifted upwards and leaves the rest stand, after the rest stand is removed, the steering engine is downwards placed on the steering engine base and assembled with the rudderstock, the steering engine and the rudderstock are smoothly installed by adjusting and optimizing the installation sequence of the steering engine system and through a space and time dislocation method, and normal press-fitting operation can be conducted under the condition that the deck layer height is insufficient. In addition, the installation method avoids forming process holes in the hull structure, avoids damaging the hull structure and the strength, and also reduces the workload of field installation.

The invention discloses a cable penetration assembly structure trepanning inspection method, device and program based on AM software, and the method comprises the steps: carrying out the collision inspection of a cable penetration assembly model and a hull structure, giving out an alarm prompt if there is interference, or obtaining the position coordinate and direction information of a cable penetration assembly, establishing a virtual cable penetration assembly based on the obtained coordinate and direction information, and then extending the section of the virtual penetration assembly; performing collision inspection on the extended virtual penetration assembly and the ship body structure, and if no interference exists between the extended virtual penetration assembly and the ship body structure, giving an alarm prompt; if interference exists, tapping is normal. And finally, based on the names of the structural grillages, the assembly names and the plate materials of the structural grillages are called, the assembly flow direction codes of the structural grillages are obtained through the assembly names, and installation stage matching and material matching are carried out. According to the invention, the cable penetration piece structure can be subjected to rapid trepanning inspection, and the working efficiency is greatly improved.

The split mounting type non-self-propelled cutter suction dredger body structure comprises a main buoyancy tank and side buoyancy tanks, and each side buoyancy tank is formed by sequentially connecting a first-section side buoyancy tank single body, a middle-section side buoyancy tank single body and a tail-section side buoyancy tank single body; a first sealing transition void cabin and a second sealing transition void cabin are arranged at the splicing ends of the head section and the middle edge buoyancy tank single bodies and are in sealing connection through fasteners; a third sealed transition void is arranged on the side, close to the main buoyancy tank, of the middle side buoyancy tank single body, a fourth sealed transition void is arranged on the side, close to the middle side buoyancy tank single body, of the tail side buoyancy tank single body, a fifth sealed transition void is further arranged on the tail side buoyancy tank single body, and the third sealed transition void and the fifth sealed transition void are connected with the main buoyancy tank in a sealed mode. A main buoyancy tank sealing chamber corresponding to the sealed transition void is welded to the inner wall of the main buoyancy tank body, a sealing assembly is arranged between the main buoyancy tank sealing chamber and the sealed transition void, and sealed connection or detachment of the side buoyancy tanks and the main buoyancy tank is achieved by operating the sealed transition void. The structure is matched with the sealing transition void and the sealing assembly, the problems that a traditional splicing mode is low in construction efficiency, poor in sealing performance, inconvenient to maintain and the like are effectively solved, and the ship body splicing construction efficiency and reliability are improved.

The invention provides an underwater vehicle stern shell structure noise reduction method, and relates to the technical field of underwater vehicle noise reduction, and the method comprises the steps: obtaining the structure data of an underwater vehicle and a vibration signal in the operation process; determining a noise reduction target for the underwater vehicle according to the vibration signal; obtaining constraint conditions for the underwater vehicle; analyzing stern flow field characteristics and horseshoe vortex formation of the underwater vehicle on the basis of fluid dynamics analogue simulation; the method comprises the following steps: arranging a transition part of the underwater vehicle, vortex eliminating rectiblocks and reinforcing ribs; simulating vibration sound radiation of the underwater vehicle under fluid excitation by applying a finite element method in combination with sound-structure interaction analysis; optimizing the size of the transition part and the mounting position of the vortex elimination rectifying piece, and further optimizing the design parameters and the mounting position of the reinforcing rib by using a genetic algorithm; and outputting the target setting position of the reinforcing rib when the vibration sound radiation reaches the noise reduction target. According to the invention, systematic noise reduction analysis of the underwater vehicle structure can be realized.

According to the simulation calculation method for successive collapse of the hull structure in the waves, a set of load-structure integrated numerical analysis method is summarized, and the method is different from a method for calculating an external load and structural strength separately in a traditional method. On one hand, the hull ultimate strength calculation precision is improved, and on the other hand, the hull structure successive collapse characteristics are more truly presented. Firstly, a theoretical basis and a calculation process of the method are introduced; then, in order to verify the feasibility and rationality of the method, a series of simulation analysis of successive collapse of the hull structure in waves is carried out according to the method, and the ultimate strength of the hull structure and the characteristics of stress distribution, deformation and the like in the successive collapse process are obtained. The result shows that the load-structure integrated numerical analysis method is reasonable and feasible, can be used as a simulation calculation method for successive collapse of ship body structures of various ships, and has important application value.

The present invention discloses a steel structure welding guide alignment device and method for ship hull structure manufacturing, which relates to the field of welding technology, and includes two housings, wherein a driving motor and an air suction pump are disposed inside the two housings, and a wire take-up mechanism for aligning the welded ship plates is disposed at the lower ends of the two housings, and a mounting mechanism is disposed between the two wire take-up mechanisms. When the angle between the two ship plates is large, the present invention can rotate on the outer surface of the second round rod through an extrusion tube, and under the action of the cable winding, drive the mounting ring to move toward the angle of the ship plates, thereby accurately adjusting the angle of the ship plates to ensure that they are in the correct docking position, and applying appropriate pressure to the ship plates through the extrusion tube can reduce the welding gap and avoid the occurrence of cold welding. At the same time, good angle alignment helps to evenly distribute the welding stress and prevent the problem of excessive local stress.

Provided is a mounting method for a dihedral-corner-area arrangement structure of a thin-film-type enclosure system. The thin-film-type enclosure system comprises a main-layer thin film layer, a fastening attachment plate, a main-layer insulating layer, a secondary-layer thin film layer and a secondary-layer insulating layer, which are sequentially connected and fixed to a ship body structure by means of penetrating fasteners. The mounting method comprises: according to set scribe lines and on a cabin wall of the ship body structure, mounting spacer plates and studs for positioning the spacer plates for a dihedral-corner-area planar transition secondary insulating module and a dihedral-corner-area secondary insulating module in a secondary-layer dihedral corner area; and then mounting the dihedral-corner-area planar transition secondary insulating module, the dihedral-corner-area secondary insulating module and other modules. A double-layer sealed storage carrier for an ultra-low-temperature medium is effectively built, and storage and leakage-prevention problems of the ultra-low-temperature medium are solved.

The invention relates to a mounting process of a fireproof and heat-insulating material for A-level fireproof separation of a ship. The fireproof and heat-insulating material is flatly laid on the upper surfaces of a structural plate and reinforcing ribs in a transverse or longitudinal lap joint or splicing manner after fire resistance detection is performed on the fireproof and heat-insulating material; or the fireproof thermal insulation material is firstly and continuously laid on the structural plate in a covering manner, and the reinforcing ribs are laid in an independent coating manner; the fireproof heat insulation material is limited on the structural plate or the reinforcing rib through a touch nail, and then the fireproof heat insulation material is fixed on the structural plate or the reinforcing rib through a pressing piece in cooperation with the touch nail. The installation process is simplified, the installation efficiency is improved, the fireproof heat insulation material can be tightly attached to the ship body structure, an effective fireproof heat insulation layer is formed, the stabilizing effect of the fireproof heat insulation material can be enhanced, the safety performance of the ship can be improved, and the installation and subsequent maintenance cost can be reduced; therefore, the problems of single installation method, low efficiency, attractive appearance and installation process defects of the existing fireproof separation material are solved.

The invention relates to the field of ocean engineering production, in particular to a floatable building for an island reef, which comprises a hull structure, a floating building body and an adjusting plate, the right end of the hull structure sinks into the seabed along one side of the island reef, and the adjusting plate is arranged at the top of the hull structure and is integrally of an L-shaped structure; according to the floating building, the pushing claw anchoring assembly is arranged, a fixing piece, an auxiliary plate, a pushing claw plate and a pushing claw piece of the pushing claw anchoring assembly are matched with one another, the pushing claw piece is driven by the gravity of the ship body to laterally extrude seabed soil, the seabed soil is accumulated in the pushing claw plate, and the seabed soil is separated from the ship body; the V-shaped push claw pieces with the sharp ends increase the contact area and the road holding force with seabed soil, the anchoring effect of the floatable building on the seabed is improved, meanwhile, the driving assembly drives the three sets of push claw pieces to do radial movement on the seabed through gravity transmission of the hull structure to achieve radial fixing, and the stability is further enhanced.