31results about "Ship vibration reduction" patented technology

Methods and systems are provided for nautical stationkeeping of free-floating objects. In one example, a method includes adjusting translational motion of a body freely floating in water by rotating the body. The translational motion may be adjusted, for instance, to maintain the body within a geographic area. In certain examples, the adjustment of the translational motion may be realized via a Magnus effect induced by rotating the body. The body may be configured as, for example, a free-floating object such as a wave engine.

This invention discloses a semi-submersible offshore platform with movable wave-breaking plates, belonging to the field of floating wind turbine turbulence. It comprises multiple platform components connected by trusses. Each platform component includes a column with a vertically oriented axis. Several movable wave-breaking plates are provided on the outer wall of the column, spirally distributed around the column's axis. Each movable wave-breaking plate includes an anti-roll plate fixed to the column's peripheral wall. A hinge is located at the lower end of the anti-roll plate; one side of the hinge is fixedly connected to the anti-roll plate, and the other side is connected to an arc-shaped cover plate. The hinge's rotation axis is horizontally oriented. The side of the arc-shaped cover plate facing the column's outer wall bulges upwards, allowing it to rotate around the hinge's axis under buoyancy. This invention can reduce vortex-induced motion and decrease platform oscillation.

The invention discloses an image recognition intelligent sensing type full-cavity magneto-rheological floating fan stabilization system and method. The system comprises an environment intelligent sensing module, a digital twinning module, a full-cavity magneto-rheological execution module and a central control module. The environment intelligent sensing module collects a wave image in real time and outputs a sea wave period; the digital twin module reconstructs a six-degree-of-freedom motion state of the variable floating type fan platform and a three-dimensional scene view of surrounding sea waves; the full-cavity magneto-rheological execution module moves and excites according to the sea wave period, the acting area and intensity of a magnetic field are adjusted, the chaining degree of magneto-rheological fluid is changed, and damping stepless adjustment is achieved. The central control module generates a corresponding control instruction and sends the control instruction to the full-cavity magneto-rheological execution module; according to the method, digital and physical double reproduction of floating type fan platform motion and the sea wave environment is achieved, self-adaptive damping adjustment can be accurately and rapidly conducted on broadband sea waves, and the power generation efficiency and platform safety are remarkably improved.

The invention belongs to the technical field of semi-submerged platforms, and discloses a transverse supporting structure and a semi-submerged platform, the transverse supporting structure comprises two transverse supporting pieces which are arranged in the transverse direction of the semi-submerged platform and arranged in the longitudinal direction of the semi-submerged platform at intervals, and the two transverse supporting pieces are located between two stand columns of the bow or the stern of the semi-submerged platform; each transverse supporting piece is used for being connected with two stand columns of the bow portion or the stern portion of the semi-submersible platform. The heaving plate is arranged between the two transverse supporting pieces and connected with the two transverse supporting pieces, and first reinforcing ribs are arranged on the heaving plate. According to the cross arm structure, the heaving, rolling and pitching periods of the semi-submerged platform can be prolonged, resonance, equipment damage and the like caused by the fact that the inherent period of the semi-submerged platform is close to the wave period are avoided, the motion response of the semi-submerged platform is reduced, and the seakeeping performance of the semi-submerged platform is improved.

The invention discloses an FLNG-LNGC combined loading and unloading operation control method and system based on real-time working condition feedback, and the method comprises the steps: firstly constructing a system state space with time-space synchronization, and collecting the time calendar of a wave field and the motion response of a ship body; and reconstructing an instantaneous wave energy spectrum, resolving ship body modal parameters, and calculating a frequency detuning safety factor. When the resonance risk exists, the system executes asymmetric loading path planning based on frequency detuning optimization, and the rotational inertia of the ship body is changed by adjusting cabin flow distribution so as to shift the inherent frequency; and meanwhile, a gas-liquid coupling active suppression instruction containing variable stiffness pressure modulation and pulse momentum damping is generated, the recovery stiffness is changed through gas phase pressure, and damping torque is generated through fluid momentum. And finally, the instructions are synthesized to drive an execution mechanism. Active regulation and control of ship body modal frequency and instant dissipation of wave disturbance are achieved, the resonance risk is effectively reduced, and the stability of double-ship operation under the severe sea condition is improved.

The invention relates to a system (2) for forming an anchoring point for a floating body of an offshore wind turbine, comprising at least one capsule (6) having an open bottom (8) and an open top (10), which capsule is at least partially filled with a solid particulate material (12) capable of withstanding shear forces with the seabed (4) on which the capsule is intended to sit, the capsule further comprises at least one attachment (14) for securing a mooring line (16) of the floating body.

The application provides a water photovoltaic system and an arrangement method thereof, which comprises a ring-shaped wave-preventing slope, a plurality of integrated fan-shaped floating plates are arranged in an array along the axis of the ring-shaped wave-preventing slope, the same connecting disc is fixedly connected to the ends of the plurality of integrated fan-shaped floating plates away from the ring-shaped wave-preventing slope, the fixed seat and the piston float are abutted through extrusion springs, the piston float is provided with a one-way air inlet valve for pumping water into the buffer groove from the outside, and the blocking net is retracted in the blocking net groove arranged in the upper portion of the ring-shaped wave-preventing slope. The ring-shaped wave-preventing slope is arranged around the floating photovoltaic device, which can effectively weaken the large fluctuation of the photovoltaic floating plate caused by the fluctuation of the water surface in each direction, and can also absorb the large fluctuation of the internal water surface through the lifting of the piston float, convert the energy generated by the water surface into the kinetic energy of the lifting of the blocking net, further prevent the photovoltaic assembly in the internal from being washed away under extremely complex conditions, and effectively ensure the safety of the water floating photovoltaic assembly.

The invention provides an active yaw adjusting system and method for a floating platform, the active yaw adjusting system comprises a monitoring unit, an anchor cable control system and three anchoring units, the three anchoring units are installed on three linear type buoys of the floating platform respectively, each anchoring unit comprises a linear guide rail, a movable anchor gear and an anchor cable, the linear guide rail extends in the length direction of the linear buoy, the movable anchor gear can move along the linear guide rail and can be locked on the linear guide rail, one end of the anchor cable is installed on the movable anchor gear, the other end of the anchor cable is provided with an anchoring part arranged on the water bottom face, and the movable anchor gear can take back or pay off the anchor cable. The included angle between the linear guide rails of every two adjacent anchoring units is 60 degrees. The control system is in control connection with the movable anchor machines of the three anchoring units; the monitoring unit is in communication connection with the control system and comprises a wave monitoring mechanism used for obtaining the period and direction of waves and a platform angle detection mechanism used for monitoring the direction of the floating platform.

A suspension system for a vessel (1) is disclosed, the vessel having at least one port hull (11), at least one starboard hull (12), and a underframe portion (10). The suspension system includes: supports (20) for at least partially supporting the underframe portion relative to the port and starboard hulls; and a left front damping plunger and a left rear damping plunger (31, 33) connected between the underframe portion and longitudinally spaced points on the at least one port hull, and a right front damping plunger and a right rear damping plunger (32, 34) connected between the underframe portion and longitudinally spaced points on the at least one starboard hull. The suspension system further includes a deck attitude control system (250) comprising a controller (252) for each of at least two orthogonally spaced damper plungers, sensors, and corresponding actuator devices. These actuators control the position of at least one point on the underframe relative to at least one reference.

The invention discloses a wind-wave-fish high-stability integrated system which comprises a floating fan platform, a heaving type wave energy power generation device and an ocean fishing net. The heaving type wave energy power generation device is installed in the center of a buoy of the floating type draught fan platform, captures energy through the vertical oscillation motion of the floating type draught fan platform under the action of waves and converts the energy into electric energy. And the ocean fishing net is fixed on the floating fan platform base. According to the floating fan platform, deep and far sea aquaculture can be achieved, and meanwhile the floating fan platform is further subjected to oscillation reduction and stabilization.

This invention proposes a floating photovoltaic platform, comprising a photovoltaic support platform, a flexible membrane, and several floats. The photovoltaic support platform includes buoys floating on the water surface and a deck positioned above the buoys. The buoys provide buoyancy, and the deck is used to mount photovoltaic modules. The floats are fixed around the photovoltaic support platform by mooring lines connected to the seabed and are spaced apart from the platform. The flexible membrane connects the deck and the floats, surrounding the photovoltaic support platform. This invention can buffer wave energy in advance using the flexible membrane, while simultaneously guiding water flow to cool the photovoltaic modules, thereby improving photovoltaic power generation efficiency.

The invention relates to the technical field of ocean, and particularly discloses a modular honeycomb floating body unit ocean platform structure and method.The modular honeycomb floating body unit ocean platform structure comprises a floating plate, wave-resistant units, connecting pieces, clamping and embedding blocks, connecting screw rods and fence columns, the wave-resistant units are fixedly connected with the floating plate and located at the lower end of the floating plate, and the two clamping and embedding blocks are arranged on the two sides of the connecting pieces correspondingly; the connecting piece is arranged on one side of the floating plate, one set of clamping and embedding blocks are embedded in the floating plate and detachably connected with the floating plate through connecting screw rods, the number of the fence columns is multiple, and each set of fence columns is in threaded connection with the floating plate and located at the upper end of the floating plate. The modularized structure is adopted for combination, transportation and installation are facilitated, meanwhile, when a single module breaks down, rapid maintenance and upgrading are facilitated, the required number of modules are correspondingly used according to requirements, the modules are flexibly installed and combined to form the required platform shape and structure, and the use and installation flexibility of the ocean platform is improved.

This invention discloses an adaptive stability adjustment device for the heave motion of an amphibious vehicle and its working method. The device includes a fixed deck at the stern of the amphibious vehicle, a folding deck at the bow, and buffer decks on both sides of the amphibious vehicle. The fixed deck is fixedly connected to the stern and has semi-cylindrical strip structures evenly spaced at its bottom. The folding deck is rotatably connected to the bow via a rotating shaft and has cylindrical strip structures evenly spaced at its bottom. This invention, through the folding and fixed decks, combined with buffer decks at different positions on both sides of the amphibious vehicle, can quickly adjust the large-amphibious heave motion of the amphibious vehicle after being impacted by waves, based on the principle of increasing impact resistance and restoring torque, allowing it to reach an adaptive dynamic equilibrium state in a short time.

The invention relates to the technical field of offshore wind power generation, in particular to an offshore wind power floating platform anti-overturning structure which comprises a platform body, a ballast tank, an adjusting valve, a conveying pump, a ballast collecting unit, a damping unit, an intelligent detection unit and a central control unit. The damping unit is movably arranged on the outer side of the platform body and connected with the central control unit, the intelligent detection unit is fixedly arranged on the outer side of the platform body and connected with the central control unit, the ballast tank is fixedly arranged on the inner side of the platform body, and the input end of the conveying pump is connected with the outer side of the ballast tank through a pipeline and electrically connected with the central control unit. The adjusting valve is connected with the ballast tank through a pipeline and electrically connected with the central control unit, the ballast collecting unit is fixedly arranged in the ballast tank and connected with the central control unit, and therefore the anti-overturning effect of the platform is achieved.

The invention provides a ship energy feedback suspension system and a cooperative control method thereof, and relates to the technical field of ship energy conservation and vibration reduction control. The TPMLG is integrated to serve as an energy converter and a variable damper, and three subsystems of energy feedback execution, energy management and cooperative control are combined, so that efficient conversion from wave energy to electric energy and intelligent suppression of ship motion are achieved; according to the system, cooperative control of three modes of energy recovery priority, stable balance and high damping priority can be dynamically switched according to sea conditions, power generation and vibration reduction performance is optimized through wavelet analysis and duty ratio adjustment, and the key technical problems of energy conservation, carbon reduction, endurance improvement, sailing stability and the like of the ship are synchronously solved.

The present application relates to a kind of zigzag damping device for cylindrical hull, including cylindrical hull and three damping box body.Three damping box body is same shape, and it is arranged at the bottom of the side of the cylindrical hull at equal intervals.Damping box body includes rotary box and multiple tooth-shaped box.Rotary box and tooth-shaped box are both shell plate structure, and independent of each other.Tooth-shaped box is closed shell plate structure, not communicated with seawater, inside is empty cabin, not load ballast water.Tooth-shaped box is same shape, horizontal section is arc side trapezoid or arc side triangle, vertical height is same with the vertical height of the outside of rotary box, convenient to be welded on the outside of rotary box.Tooth-shaped box and rotary box are independent of each other, and the welding strength between tooth-shaped box and rotary box is lower than the welding strength between rotary box and cylindrical hull, and the damage or drop of single or multiple tooth-shaped box will not cause greater influence to the stability, safety etc.of cylindrical FPSO.

The present invention relates to a system (2) for forming anchor points for a floating body for an offshore wind turbine, the system comprising at least one housing (6) having an open bottom (8) and an open top (10), the housing being at least partially filled with solid granular material (12) that can withstand shear with the seabed (4) on which the housing is intended to be placed, and the housing further comprising at least one attachment (14) for securing a mooring line (16) of the floating body.

A suspension system for a watercraft (1) having a port hull (11), a starboard hull (12), and a chassis portion (10), the suspension system including supports (20) for at least partially supporting the chassis portion relative to the port and starboard hulls, front left and back left damping rams (31, 33) connected between the chassis portion and longitudinally spaced apart points on the port hull, and front right and back right damping rams (32, 34) connected between the chassis portion and longitudinally spaced apart points on the starboard hull. The suspension system further includes a deck attitude control system (250) having a controller (252), sensors, and respective actuator arrangements for each of the at least two orthogonally spaced apart damper rams. The actuators control the position of at least one point on the chassis relative to at least one reference.

This invention discloses a marine photovoltaic system, comprising a float and a buoy assembly. Photovoltaic panels are mounted on the float, and the buoy assembly includes two buoys located on opposite sides of the float. Elastic cables are connected to the buoys, with anchors connected to the bottom ends of the elastic cables. A plurality of mooring line groups are connected between the two buoys, distributed horizontally and passing through the float. This structure can withstand harsh sea conditions, support marine photovoltaic systems in deep-sea areas, and improve the utilization rate of marine space.

The invention discloses an FLNG-LNGC combined operation platform passive vibration reduction system based on anti-resonance tuning. The system comprises a main hydraulic conversion unit, a hydrostatic pressure sensing variable stiffness unit, a pressure sensitive type variable inerter unit and a differential type clearance fluid capture damping unit. The main hydraulic conversion unit converts vertical motion of the hull into hydraulic circuit fluid flow. The hydrostatic pressure sensing variable stiffness unit adjusts the loop stiffness through external water pressure. The pressure-sensitive deformation inerter unit compresses a fluid channel through external water pressure to reduce the sectional area, so that the fluid inertia coefficient is remarkably increased along with increase of draught. According to the method, the parameter evolution relation that the fluid inertia coefficient growth rate is larger than the rigidity growth rate is constructed, so that the inherent frequency of the system is automatically reduced along with the increase of the draught, the frequency drift caused by the increase of the loading capacity of the FLNG is passively tracked, the interstitial resonance is effectively inhibited, external energy sources are not needed, and the environmental adaptability is high.

The application provides a ship energy feedback suspension system and a cooperative control method thereof, and relates to the technical field of ship energy saving and vibration reduction control. The application realizes efficient conversion of wave energy into electric energy and intelligent suppression of ship body movement by integrating a TPMLG as an energy converter and a variable damper, combining three subsystems of energy feedback execution, energy management and cooperative control; the system can realize cooperative control of three modes of energy recovery priority, stable balance priority and high damping priority according to the sea state, and can utilize wavelet analysis and duty cycle adjustment to optimize power generation and vibration reduction performance, thereby synchronously solving key technical problems such as ship energy saving and carbon reduction, endurance improvement and navigation stability.

This invention discloses a mooring structure for a combined floating marine photovoltaic system, relating to the field of marine photovoltaic power generation technology. It includes several floating bodies assembled into an annular platform via connectors. Cables are movably connected to the sides of the annular platform via a V-shaped connection structure. An anchorage is connected to the end of the cable furthest from the floating body. Bearing hooks are arranged in a circular array on the sidewalls of the floating bodies, with ring clamps penetrating the hooks. These ring clamps are movably connected to the V-shaped connection structure. This invention connects the photovoltaic platform to the anchorage via elastic cables, effectively coping with dynamic loads from waves, currents, and strong winds. It avoids structural damage caused by stress concentration in traditional fixing methods, significantly improving the stability and reliability of the photovoltaic platform structure under harsh sea conditions. Furthermore, compared to traditional structures, the connection and fixing method of this invention is simpler to install and maintain, significantly reducing the construction and operation costs of marine floating photovoltaic projects.

The application discloses a wave energy power generation device, which comprises an underwater floating body, an energy conversion unit installed in the underwater floating body, and a central floating body fixed to the upper end of the underwater floating body, wherein the outer wall of the central floating body is sleeved with a main float, the main float is connected with the energy conversion unit through a pressure cylinder, the circumferential side of the underwater floating body is provided with at least two groups of anchoring units, the circumferential side of the main float is symmetrically distributed with a plurality of auxiliary float units, and the auxiliary float units are rigidly connected with the main float. The wave energy power generation device has the beneficial effects that the circumferential side of the main float is provided with the plurality of auxiliary float units which are rigidly connected and are circumferentially distributed, the auxiliary float units increase the contact area between the device and the sea surface, enhance the water resistance effect of the device as a whole, can effectively inhibit the freedom of the main float in five directions of sway, surge, yaw, roll and pitch, the device can independently maintain the initial floating state, keep the wave energy capturing movement in the single degree of freedom of heave, and improve the wave energy capturing efficiency.

The application discloses a variable-structure wave-adaptive catamaran, which comprises two floating cylinder hulls (1) symmetrically distributed along a rolling axis of the catamaran, a deck platform (4) located between the two floating cylinder hulls (1) and a power propeller (5) installed at the tail of the floating cylinder hull (1), wherein the deck platform (4) is installed on the two floating cylinder hulls (1) through a hydraulic deformation mechanism (3), so that the height of the deck platform (4) and the distance between the two floating cylinder hulls (1) can be adjusted.

A suspension system for a vessel (1) having at least one left hull (11), at least one right hull (12) and a chassis portion (10), the suspension system including supports (20) for at least partially supporting the chassis portion relative to the left and right hulls, and a front left and back left damping ram (31, 33) connected between the chassis portion and longitudinally spaced points on the at least one left hull, afront right and back right damping ram (32, 34) connected between the chassis portion and longitudinally spaced points on the at least one right hull. The suspension system further includes a deck attitude control system (250) comprising a controller (252), sensors, and a respective actuator arrangement for each of at least two orthogonally spaced damper rams. The actuators control a position of at least one point on the chassis relative to at least one reference.

The invention relates to the technical field of offshore photovoltaic, and discloses a self-adaptive buffering offshore photovoltaic platform floating body module connecting device which comprises a floating body and a butt joint groove formed in the floating body, and further comprises a butt joint plate with the two ends fixed to the butt joint groove through bolts; the mounting grooves are formed in the four sides of the floating body; the buffer part is fixed on the mounting groove; the airtight piece is fixed in the buffer piece; the early warning piece is fixed in the buffer piece; the buffer cylinder is positioned in the mounting groove; the first conical vortex sheets and the second conical vortex sheets are arranged in a rhombus shape to form a multi-directional elastic bearing structure, and the multi-directional elastic bearing structure can accurately adapt to the complex composite acting force of up-down swinging and four-side deviation of the floating body; the first conical vortex piece, the second conical vortex piece, a magnetic current box, a magnetic current pipe, a magnetic current cylinder, a magnetic current main piston, a universal seat, a universal swing rod, a magnetic isolation pad, a magnet exciting coil, a magnetic current auxiliary piston and a magnetic current spring form an efficient cooperation mechanism of vortex piece elastic buffering and magnetic current damping regulation and control.

The application discloses a marine multi-element weather observation instrument, and belongs to the technical field of marine observation. The weather observation instrument comprises a floating body, a frame body is arranged on the floating body, a first collector is arranged on the frame body, a through hole is arranged at the center of the floating body, at least one first slot communicating with the through hole is arranged on the side surface of the floating body, and a first connecting piece is arranged between adjacent slot surfaces of the first slot. The device can collect marine and atmospheric interaction data, weather data and the like. The observation instrument can solve the problems of too large floating moving range of the buoy on the sea surface and stability of the buoy on the sea surface, has a long service life and low maintenance frequency.

A suspension system for a vessel (1) having at least one left hull (11), at least one right hull (12) and a chassis portion (10), the suspension system including supports (20) for at least partially supporting the chassis portion relative to the left and right hulls, and a front left and back left damping ram (31, 33) connected between the chassis portion and longitudinally spaced points on the at least one left hull, a front right and back right damping ram (32, 34) connected between the chassis portion and longitudinally spaced points on the at least one right hull. The suspension system further includes a deck attitude control system (250) comprising a controller (252), sensors, and a respective actuator arrangement for each of at least two orthogonally spaced damper rams. The actuators control a position of at least one point on the chassis relative to at least one reference.

This invention relates to the field of marine photovoltaic technology and discloses an adaptive buffering floating block connection device for marine photovoltaic platforms, comprising: a floating body and a docking slot formed on the floating body, further comprising: a docking plate, both ends of which are bolted to the docking slot; mounting slots formed on the four sides of the floating body; a buffer component fixed to the mounting slot; an airtight component fixed inside the buffer component; a warning component fixed inside the buffer component; and a buffer cylinder located inside the mounting slot. This invention uses a first conical vortex plate and a second conical vortex plate arranged in a rhomboid pattern to form a multi-directional elastic bearing structure, which can accurately adapt to the complex combined forces of the floating body's vertical swing and four-sided offset. The first and second conical vortex plates, together with the magnetic flux box, magnetic flux tube, magnetic flux cylinder, magnetic flux main piston, universal seat, universal swing rod, magnetic isolation pad, excitation coil, magnetic flux auxiliary piston, and magnetic flux spring, construct an efficient synergistic mechanism for the elastic buffering of the vortex plate and the control of magnetic flux damping.

The invention provides a moon pool structure of a drilling ship, and relates to the field of drilling ship equipment, the moon pool structure comprises a moon pool opening, a moon pool enclosure bulkhead and a moon pool bottom, and further comprises a flow guide buffer mechanism which is arranged on the inner side of the moon pool enclosure bulkhead in a surrounding mode and comprises a flow guide cover, a buffer plate and a hinge supporting assembly connected with the flow guide cover and the buffer plate; the sealing system is arranged on the periphery of the opening of the moon pool and comprises a sealing ring, a hydraulic actuator for driving the sealing ring and a sensor for sensing the height of waves; the telescopic protective fence is arranged on the edge of the opening of the moon pool and comprises a plurality of protective fence units, a telescopic mechanism for driving the protective fence units and a locking device. Wave impact is reduced through the flow guide buffering system, intelligent sealing adapts to different sea conditions, safe operation is ensured through telescopic protection, the structural service life is prolonged through the vibration suppression device, the working face is stabilized through the hydraulic compensation platform, the emergency system quickly responds to emergency situations, and the operation safety and operation efficiency of the drilling ship are comprehensively improved.