78 results about "Ship stability" patented technology

The invention provides a cargo allocation method for improving quay crane operation efficiency and ship stability for containers. First, the quantity, size and weight of containers for shipment and departure, the quantity of the ship container positions and the destination port of the containers are determined; then, the decision variable of the ship container position for stacking each container is determined; an objective function of the ship stability and the constraint condition of the quay crane operation efficiency and the ship stability are established; the ship container positions are distributed in advance by utilizing a heuristic algorithm; the ship container position specifically for stacking each container is further determined, and the containers are loaded on a ship and allocated. The cargo allocation method is provided for solving the problems that the optimal stability and the least container loading and unloading frequency are difficult to be both considered according to an allocation schedule and long time is consumed in the making process, the constraint conditions needing to be met by making the cargo allocation schedule are fully considered, wherein the constraint conditions include ship performance, a ship structure, container types and sizes, port operation and the like. A container position distribution result is obtained with the aim of minimizing the ship stability deviation and the loading and unloading operation frequency in the ship unloading operation process.

The invention aims to provide a longitudinal movement attitude control device for a catamaran. The longitudinal movement attitude control device comprises a deck. A first sheet and a second sheet are respectively mounted at the left end and the right end of the lower side of the deck, a first front strut and a second front strut are respectively mounted at the front end of the first sheet and the front end of the second sheet, a first rear strut and a second rear strut are respectively mounted at the rear end of the first sheet and the rear end of the second sheet, a front hydrofoil is mounted at the lower end of the first front strut and the lower end of the second front strut, a rear hydrofoil is mounted at the lower end of the first rear strut and the lower end of the second rear strut, a first flap and a second flap are respectively arranged at the rear end of the front hydrofoil and are connected with the front hydrofoil by a first transmission shaft, a third flap and a fourth flap are respectively arranged at the rear end of the rear hydrofoil and are connected with the rear hydrofoil by a second transmission shaft, and the first transmission shaft and the second transmission shaft are respectively connected respective servo systems. The longitudinal movement attitude control device has the advantages that a heeling angle of the catamaran during pitching/heaving movement and rotation can be effectively reduced when the catamaran sails at a high speed, and accordingly the stability of the catamaran is improved.

The invention discloses a marine electromagnetic counter-rotating hub-type rim water jet propeller, which comprises a water spray pipe, an annular permanent magnet motor device, a counter-rotating rim propeller, a bearing assembly and a sealing assembly; wherein, the water spray pipe includes a shell The body and the water outlet and water inlet arranged at both ends of the shell; the annular permanent magnet motor device and the counter-rotating rim propeller are arranged on the shell near the water outlet; the counter-rotating rim propeller includes a first-stage rim propeller and a second-stage rim propeller The rim propeller, the first-stage rim propeller and the second-stage rim propeller are connected to each other through a bearing assembly; there are two annular permanent magnet motor devices, which are respectively arranged on the outer shell of the first-stage rim propeller and the second-stage rim propeller On the body; the annular permanent magnet motor device and the bearing assembly are provided with a sealing assembly. The invention has the advantages of high maneuverability, high propulsion efficiency, high ship stability, low vibration and noise, high strength, safety and reliability, and the like.

The invention discloses a double-draft three-body scientific research ship. The double-draft three-body scientific research ship comprises a main deck, wherein a main ship body is arranged rightly below the main deck in the front-back direction; side ship bodies are respectively arranged at the left and right sides of the lower side of the main deck; at least one shallow-draft water spraying propeller is arranged at the lower part of the back end of the main ship body in the front-back direction; deep-draft water spraying propellers are arranged at the lower parts of the back ends of the two side ship bodies in the front-back direction; multiple conventional ballast tanks and multiple deep water ballast tanks are symmetrically arranged at the left and right two sides of the main ship body; multiple deep water ballast tanks are symmetrically arranged at the left and right sides of the two side ship bodies; and the main ship body is additionally provided with more than one ballast adjusting pumps for adjusting water quantities stored in the conventional ballast tanks and the deep water ballast tanks and more than one generating sets. The double-draft three-body scientific research ship can be synchronously applied to a coastal shoal water area and a deep water area, has a wide deck area and a large in-cabin laboratory area, and has higher speediness, excellent ship stability and wave resistance.

The invention discloses a container floating breakwater and a construction technology thereof. The breakwater comprises a plurality of breakwater units and an anchoring system. The breakwater units are container floating bodies. The container floating bodies are connected end to end to form the floating breakwater which is anchored and positioned by the anchoring system. The construction technology of the container floating breakwater comprises the following steps that 1, the container floating bodies are assembled; 2, an anchor block is installed on site; 3, the container floating bodies are hoisted on site and connected to form the floating breakwater; and 4, an anchor chain is installed to anchor and position the floating breakwater. In this way, the formed floating breakwater is convenient to construct, fast to assemble and disassemble, low in manufacturing cost, good in breakwater effect, and capable of well blocking ship waves produced by a high-speed passenger ship, reducing influences of the ship waves on the construction ship stability and blocking natural waves, so that the natural wave height of a construction point is reduced, and a temporary support on the construction point is stable.

The invention relates to a control method for a clam-shaped bilge keel. A main body structure of the lam-shaped bilge keel comprises two parts of a fixed clamshell structure (2) and a rotary clamshell structure (1), wherein the rotary clamshell structure (1) is connected with the fixed clamshell structure (2) through a rotating shaft system. The control method comprises the following steps of monitoring a rolling angle, an angular velocity and an angular acceleration of a ship during ship navigation; obtaining ship draft information; checking ship stability variation; if any one of the three parameters of the rolling angle, the angular velocity and the angular acceleration continuously exceeds a corresponding safety threshold upper limit within a set time, driving the rotating shaft system by using a motor so as to unfold the rotary clamshell structure of the bilge keel; and if the three parameters of the rolling angle, the angular velocity and the angular acceleration are all continuously lower than corresponding safety threshold lower limits within a set time, driving the rotating shaft system by using the motor so as to fold the rotary clamshell structure of the bilge keel. According to the invention, the opening and closing of the bilge keel can be intelligently controlled.

The invention discloses a rotatable ship rudder with bulge front edges, which relates to the technical field of rudder structures. The rudder comprises a main rudder blade and a tail rudder blade, thetail rudder blade is arranged at the rear end of the main rudder blade, and the main rudder blade comprises a body and a plurality of bulge front edges which are arranged at the front end of the bodyand protrude forwards. The bulge front edge structure can improve the flow field structure, the main rudder blade and the tail rudder blade can increase the bending degree of the rudder blades, and the combination of the two can improve the hydrodynamic performance of the rudder and improve the stability of the ship; cavitation erosion can be reduced through the oval front edge or the curvature continuous front edge blade profile, and the service life of the rudder is effectively prolonged; the bulge front edge and the body curvature of the main rudder blade are in continuous transition combination, or the bulge front edge and the body ellipse of the main rudder blade are in transition combination, so that the rudder resistance during advancing can be reduced, and the oil consumption is reduced; the main rudder blade is connected with the ship body through the rudder stock, the tail rudder blade is connected with the ship body through the auxiliary rudder stock, bearing of the rudderstock can be reduced, and stability of the cantilever rudder is improved.

The invention provides a ship ballast water chamber structure and a ship. The ship ballast water chamber structure provided by the invention comprises a left ballast water chamber, a right ballast water chamber and a separation chamber wall, the left ballast water chamber and the right ballast water chamber are adjacent and symmetrically arranged, and the separation chamber wall is used for separating the left ballast water chamber and the right ballast water chamber; and a communicating valve capable of being opened or closed is arranged on the separation chamber wall, when the communicatingvalve is opened, the left ballast water chamber and the right ballast water chamber are communicated, and when the communicating valve is closed, the left ballast water chamber and the right ballast water chamber are independent of each other. According to the ship ballast water chamber structure and the ship, the stability of the ship can be improved, and the ship overturning risk is reduced.

The invention discloses a multi-mast rotating-type stack-up wind sail for ships. The wind sail comprises a mast component, a plurality of wind sail components and multiple pairs of cables. The mast component comprises multiple masts, and the masts are different in length and are sequentially fixed together in a stacked mode according to the length. The wind sail components are connected with the corresponding masts in a matched mode respectively. The cables are in a circular ring shape. One ends of the pairs of the cables are arranged on the corresponding masts in a sleeved mode respectively, and the pairs of cables are fixedly connected with the corresponding wind sail components at the same time. According to the multi-mast rotating-type stack-up wind sail for the ships, the masts different in length are arranged, the wind sail components are arranged on the masts, due to the fact that the larger the distance is from the sea level, the richer the wind energy is, the wind velocity gradient change on the sea is considered, a wind sail device designed according to the wind velocity gradient can fully utilize the wind energy of a higher space where the wind power is large and stable, the turbulence level of the air flow is small and interference factors are fewer, and thus ship stability is facilitated.

The invention discloses a power generation propulsion roll-weakening integrated device suitable for ships. The power generation propulsion roll-weakening integrated device suitable for the ships comprises a push rod and a power generation propulsion roll-weakening system, the push rod is connected with the top end of a rotary device, and the bottom end of the rotary device is connected with a linear motor through a rotary shaft. The power generation propulsion roll-weakening system comprises a generator, an electric motor, a water turbine and a propeller, the propeller is connected with the front end of the electric motor through a connecting rod, the water turbine is connected with the front end of the electric motor through the connecting rod, the electric and the rear end of the generator are fixed through a second support, one end of the second support is connected with the linear motor, and the other end of the second support is connected with a first support. The first support isenclosed on the outer side of the propeller and the water turbine and fixed through the linear motor, and fixing devices are mounted on the outer side, opposite to the propeller and the water turbine, of the first support. According to the power generation propulsion roll-weakening integrated device suitable for the ships, in addition to using tides to generate electricity, the functions of propulsion and weakening roll can further be achieved, the marine environmental pollution is reduced, the ship cruising ability is improved, the ship navigation speed is sped up, and the ship stability isenhanced.

The invention relates to a control method of a frog mouth type bilge keel. A main structure of the frog mouth type bilge keel comprises a fixed clamshell structure (2) and a rotary clamshell structure (1). The rotary clamshell structure (1) is connected with the fixed clamshell structure (2) through a rotary shaft system. The control method of the frog mouth type bilge keel includes the steps that when a ship sails, the rolling angle, the angular speed and the angular accelerated speed of the ship are monitored, ship draught information is obtained, and the ship stability change is checked; if any index of the three parameters including the rolling angle, the angular speed and the angular accelerated speed continuously exceeds the upper limit of a corresponding safety threshold value within a set time, a motor is used for driving the rotary shaft system to unfold the rotary clamshell structure of the bilge keel; and if the three parameters including the rolling angle, the angular speed and the angular accelerated speed are continuously lower than the lower limit of the corresponding safety threshold value within the set time, the motor is used for driving the rotary shaft system to fold the rotary clamshell structure of the bilge keel. By the adoption of the control method of the frog mouth type bilge keel, the bilge keel can be intelligently controlled to be unfolded and folded; and the rolling damping of the ship can be increased, rolling of the ship is effectively reduced, and rolling stability is enhanced.

The invention provides a monitoring system for the stern gantry structure of a large-scale ocean trawler, which belongs to the field of ship structure monitoring. The system comprises a sensor system,an information acquisition and processing system, an information communication and transmission system, an information analysis and monitoring system, and an intelligent loading system. A fiber grating strain sensor in the sensor system collects structural strain data of the stern gantry. A fiber grating demodulator in the information acquisition and processing system converts a wavelength signalof a reflected light wave into an electrical signal. An information analysis computer in the information analysis and monitoring system analyzes the data through software with a damage diagnosis function, determines the location of the damage, identifies the damage degree, and evaluates the health status of the structure. The intelligent loading system can use the data of the information analysisand monitoring system to calculate ship stability, ship strength and structural stress. The system reasonably combines the loading system and the monitoring of the stern gantry structure of large-scale ocean trawler, and intuitively displays the force of the tailgate.

[Object] Conventionally, measures for securing stability of a ship when it is damaged are required.

[Solution] The invention is characterized by having a remotely openable seawater inlet means provided to a lowermost watertight deck that forms a void space at the bottom of the ship. Thereby, when a side shell plate or the like of the ship is damaged and seawater enters the ship, the seawater that has entered the ship can be introduced into the void space by opening the seawater inlet means provided to the lowermost watertight deck, so that the void space, which usually provides a huge auxiliary buoyancy, can be made to function as a sort of a seawater ballast tank, whereby the ship's stability can be recovered.

The invention relates to the technical field of ship design, in particular to a tumbler ship model. A bottom balance cabin is additionally arranged, so that the height of the gravity center of a ship is effectively reduced; due to the fact that the volume of displacement of the ship is increased, freeboards are heightened, and the water inflow angle is relatively increased; folded edges are arranged on the double-layer bottom and the bottom edge, resistance is increased in the rolling process of the ship, and the rolling frequency is reduced; the area moment in the position of the fifty percent of the liquid level is relatively reduced, so that free liquid level influences are reduced. Thus, the ship is in a stable and balanced state, the safety performance is greatly improved, through a stability calculation method, the ship stability and balance reliability can be improved by increasing a GM value, and the safety performance is higher.

The invention provides a telescopic water surface garbage cleaning ship. The telescopic water surface garbage cleaning ship comprises a gathering mechanism, a conveying mechanism, a garbage bin, buoys, telescopic mechanisms, an operation table and a main ship body which form a stable water surface garbage cleaning platform. When the whole ship is unfolded, the gathering mechanism slides downwards,a gathering net is unfolded outwards, the conveying mechanism rotates downwards, the telescopic mechanisms are unfolded, the buoys move downwards and meanwhile move to both sides, the transverse sizeis increased, and the stability of the ship is improved; and when the whole ship is folded, the gathering mechanism slides upwards, the gathering net rotates inwards, the conveying mechanism rotatesupwards, the telescopic mechanisms are folded, the buoys move inwards, the transverse size of the whole ship is reduced, and the space utilization rate is reduced. A garbage bin unloading bin door islocated at the bottom to be convenient to unload, a smashing device is arranged in the garbage bin, efficiency is improved, and occupied garbage space is reduced. The garbage cleaning ship is variablein transverse size, attractive in appearance, capable of being operated remotely or manually and good in garbage cleaning effect, and has important popularization value.

The invention discloses a horizontal swinging-resistance device for a transport ship cargo bin for cargos with the easy flowing state. The horizontal swinging-resistance device comprises the cargo bin and is characterized in that guide rails are mounted on the left bin wall and the right bin wall of the cargo bin in a uniform distribution mode; moving blocks are clamped on the guide rails; swinging-resistance partition plates are hinged to the bottom ends of the moving blocks; and one ends of hydraulic oil cylinders are hinged to the moving blocks, and the other ends of the hydraulic oil cylinders are hinged to the swinging-resistance partition plates. Racks are arranged on the inner sides of the guide rails; the moving blocks are internally provided with gears through sliding bearings; the gears and the racks are engaged; the moving blocks are engaged with the guide rails through the gears and the racks; the tops of the moving blocks are hinged to the hydraulic cylinders; and the hydraulic cylinders are hinged to the guide rails. The horizontal swinging-resistance device has the beneficial effects that under the condition that the moisture content of the cargos with the easy flowing state is not excessively restricted, the horizontal swinging-resistance partition plates which can make two-degree-of-freedom movement are arranged in the bin, thus horizontal movement of the cargos with the easy flowing state is restrained, and ship stability is guaranteed; and the system is simple in structure, convenient to operate, high in practicability and wide in application range.

The invention discloses an auxiliary device for overcoming defects in ship stability. The device comprises a connection arm (1) and a floating barrel (2), wherein one end of the connection arm (1) is inserted into a mounting hole (3) at the center of the floating barrel (2) and is detachably connected with the floating barrel (2); the other end of the connection arm (1) is detachably connected with the ship body; a push device is arranged in the axial position of the connection arm (1), and pushes the connection arm (1) to move forwards; the ship body is connected with the floating barrel (2) through the connection arm (1); an operation structure is arranged at the top of the floating barrel (2); a valve is arranged at the bottom of the floating barrel (2); and the operation mechanism controls the valve to be opened/closed. Through the invention, the ship stability can be improved; when in use, the auxiliary device is firmly connected with the ship body; and the auxiliary device is convenient to disassemble.

The invention discloses a ship situation detection system, which is characterized in that a central processing unit generates ship motion state information, oil consumption energy efficiency information, meteorological environment information, navigation information, ship stability information and cargo loading and unloading information according to basic information; the ship motion measurement system sends the motion state basic information, the motion speed basic information and the motion acceleration basic information to a central processing unit; the ship navigation system sends the position basic information and the course basic information to a central processing unit; the navigation meteorological information system sends meteorological basic information to the central processingunit; the loading computer sends the ship stability basic information, the cargo hold strength basic information, the ship water tank basic information, the oil tank data basic information and the cargo loading and unloading basic information to the central processing unit; and the human-computer interface control center displays the ship motion state information, the oil consumption energy efficiency information, the meteorological environment information, the navigation information, the ship stability information and the cargo loading and unloading information sent by the central processingunit on the display device.

The invention provides a high-mobility ship propelling mechanism. The high-mobility ship propelling mechanism comprises an airscrew propeller and a hull internal power supply device, wherein the screwpropeller is installed on a side wall of a hull, and comprises a propeller housing, a propeller connecting device, a fixing device, a sealing cabin, a fairing, a sealing door, a motor fixing housing,a motor and an airscrew; and the hull internal power supply device is installed in the hull, and comprises a switch control device, a generator, a main power distribution module, a ship electric appliance, a frequency converter, a battery converter and a battery. The high-mobility ship propelling mechanism is capable of realizing in-situ rotation, greatly reducing a turning radius of a ship, thereby improving mobility of the ship, and because the propelling device is positioned at two sides of the ship, a horizontal direction force moment is increased, and ship stability in a turning processof the ship is improved, and because the airscrew propeller is installed at the outer side of the hull, a hull internal structure is not changed, so the high-mobility ship propelling mechanism is beneficial to upgrading and rebuilding of an old-type hull.

The invention discloses a cargo bay deck loading optimization method. According to the method, finite element analysis and ship stability are performed on a 46000DWT bulk cargo bay to obtain the mean thickness of a middle deck and the areas of first, second and fifth cargo bay covers by changing the mean thickness of a side deck on the previous basis, and therefore, the loading capacity of the cargo bay deck is optimized. The cargo bay deck loading optimization method is capable of confirming the loading weight of the ship deck on the basis of ensuring the existing ship structure design; the loading height of the deck is determined on the basis of ensuring the stability of the ship. The cargo bay deck loading optimization method is capable of increasing the ship cargo capacity to the utmost extent, and the key points of the method are the finite element calculation of the ship structure after loading on the deck and the calculation of the ship stability. The deck freight load is increased to the utmost extent by virtue of the finite element calculation and the ship stability calculation, and therefore, the cargo capacity of the ship in operation can be increased by about 11000 tons.