201 results about "Propulsive efficiency" patented technology

The invention provides a ship main engine power real-time optimization method based on a hybrid network model, and belongs to the technical field of ship energy saving.A hybrid neural network model is constructed, the hybrid neural network model is based on a physical information neural network, a KAN network is introduced to serve as a front-end network structure, and the power of a ship main engine is optimized in real time; the high-dimensional nonlinear mapping module is used for establishing high-dimensional nonlinear mapping from navigational speed, a ship type parameter matrix, propulsive efficiency, fuel conversion efficiency and environmental factors to the minimum power of a main engine; a composite loss function is adopted to train the hybrid neural network model, wherein the composite loss function is formed by weighted summation of mean square error loss, dynamics constraint loss, propulsive efficiency constraint loss and fuel consumption constraint loss; using the trained hybrid neural network model to receive ship operation parameters and environment parameters collected in real time, and outputting a minimum power prediction value of the ship main engine through one-time forward propagation calculation to realize real-time optimization of the main engine power.

The invention discloses a muck treatment capacity monitoring method and a muck treatment capacity monitoring system, and relates to the technical field of shield construction and muck treatment capacity prediction treatment, and the method comprises the following steps: collecting operation parameters of a shield tunneling machine deslagging and conveying link, calculating a muck flow coupling index, evaluating a deslagging link coupling state, and carrying out optimization; the load coupling index of the shield tunneling machine is calculated, the energy distribution balance is judged, and dynamic adjustment is conducted according to the unbalance state; calculating the energy consumption deslagging propulsion efficiency, evaluating the matching degree, and optimizing the power and conveying parameters of each link; a CNN and LSTM combined multi-scale modeling method is adopted to predict the future muck handling capacity, and online correction is carried out through a sudden change adaptive network; and finally, fusing the standardized data set with the actual operation parameters to generate a unit time muck handling capacity sequence. By means of the method, the deslagging and propelling matching degree of the shield tunneling machine can be improved, the energy utilization efficiency is optimized, and high-precision prediction and real-time regulation and control of the muck handling capacity are achieved.

The invention provides a double-rotor direct-drive coaxial reverse-propeller electric ducted fan, which is characterized in that a single motor with an inner rotor and an outer rotor directly drives two pairs of blades, an intermediate transmission device and an inner rotor excitation group to generate a rotating magnetic field, and a first-stage propulsion component and a second-stage propulsion component with the same rotational inertia are driven under the action of electromagnetic torque with the same acting force and counter-acting force; one-way rotation deflection torque is balanced, and coaxial reverse propeller movement is achieved; the rectification duct reduces the induced resistance of the blades and improves the propulsive efficiency, the convergence and expansion guide sleeve and the motor frame body dissipate heat to form circulating heat dissipation of the Brayton heat engine, meanwhile, air is heated, expanded and ejected out to generate thrust, the efficiency is high, and the thrust is large. The dual-rotor motor direct-driven coaxial reverse propeller ducted fan propulsion unit is simple in mechanism, light in structure, large in power-to-weight ratio, high in reliability, beneficial to use in a narrow space and vertical take-off and landing, especially suitable for an EVTOL (electric vertical take-off and landing aircraft), and capable of promoting popularization of small aircrafts and vertical take-off and landing urban transportation carriers.

The invention provides an underwater running double-stator beam flow rim propeller structure which comprises a guide pipe, the interior of one end of the guide pipe is connected with a front propeller hub, a front propeller hub cap is installed at one end of a propeller shaft, a front deflection stator, a rim transmission device and a rear deflection stator are sequentially installed on the propeller shaft, and the front deflection stator is connected with the front deflection stator. The other end of the conduit is connected with the tail beam tube; the wheel flange transmission device comprises a wheel flange transmission ring, the wheel flange transmission ring is connected with a paddle, and the paddle is installed on the rotor inner shaft. The guide pipe is used as a connecting carrier of the stator, the rim and the beam tube, and the rim transmission device is used as a power source device of the propeller. The front torsion stator plays a role in enabling inflow of the rotor to generate prerotation, the rear torsion stator plays a role in adjusting the torsion angle of the blades according to the fluid speed so as to better absorb wake flow energy, and the beam barrel is used for restraining the wake flow and concentrating pressure at the tail of the propeller on beams in the same direction, so that the effect of improving the propelling efficiency is achieved.

According to the light helium storage spray pipe with the integrated efficiency of efficiency increasing, pushing changing, phase change heat prevention and infrared stealth, by means of the high phase change latent heat characteristic of liquid helium, the liquid helium is directly injected into the spray pipe to be mixed with high-temperature fuel gas; the temperature of fuel gas and thermal stress borne by a spray pipe material are remarkably reduced through phase change heat absorption, heat convection and gas film cooling, efficient thermal protection is achieved, the infrared radiation intensity of exhaust plume is effectively restrained, and the infrared stealth effect is achieved; the characteristic that helium is small in molecular weight is utilized, the expansion power capability of mixed gas and the propulsive efficiency and specific impulse of the engine are improved, meanwhile, through real-time regulation and control of helium injection flow, thrust adjustment to a certain degree can be achieved, and the maneuverability of the engine is enhanced. According to the designed composite interlayer structure, the thickness of the wall face of the spray pipe can be greatly reduced, the structural strength of the spray pipe is improved, and then the overall mass of an engine is reduced.

The invention discloses a clover-shaped superconducting magnetofluid thruster and a thrusting system.The thruster comprises a thrust generating module, a flow guiding module and a reversing transmission module, the thrust generating module comprises at least two superconducting coil assemblies and a protection shell, and the superconducting coil assemblies are rotationally connected into the protection shell; a seawater channel is formed in each superconducting coil assembly, the area of the cross section of each seawater channel is gradually reduced from the inlet end to the outlet end of the seawater channel, the flow guide module wraps the protective shell and is in a streamline shape from the inlet end of the seawater channel to the outlet end of the seawater channel, and the reversing transmission module is fixedly connected with the flow guide module. On the premise that the quiet performance is guaranteed, the propelling efficiency of the superconducting magnetofluid propeller is improved, and the navigation efficiency and navigation safety are guaranteed through cooperation of a series of intelligent devices.

The invention discloses a shaftless rim propeller with bearing and motor integrated driving steering. The shaftless rim propeller comprises a full-rotation device and a shaftless rim propelling unit. The full-rotation device comprises a main shell assembly and a full-rotation motor, the full-rotation motor is sleeved with the main shell assembly, the full-rotation motor comprises a water-lubricated bearing rotor and a first permanent magnet, and the first permanent magnet is embedded into the water-lubricated bearing rotor; the shaftless rim propelling unit comprises a propeller shell assembly, a spherical driving motor and blades, the propeller shell assembly is arranged on the outer side of the spherical driving motor in a sleeving mode and connected with the main shell assembly, and the spherical driving motor is in transmission connection with the blades. The structure of the full-rotation device is simplified, the structure is compact, a transmission mechanism is omitted, the full-rotation device is driven by the motor, and the full-rotation efficiency of the full-rotation device is improved. The three-degree-of-freedom rotation characteristic of the spherical motor is utilized, the propelling direction of propagation is adjusted in any direction, the propelling efficiency is improved, and the maneuverability of the ship under the non-design working condition is improved.

The invention discloses a ship propeller energy-saving rectifying device with diversion wings, and particularly relates to the technical field of ships, the ship propeller energy-saving rectifying device comprises a ship body, a driving rod is arranged at the rear end of the ship body, a propeller is arranged at the rear end of the driving rod, and a plurality of diversion wings are fixedly installed on the outer wall of the driving rod in an annular array mode. An L-shaped fixing support is arranged above the driving rod, the L-shaped fixing support is installed on the rear side of the ship body, a rectifying mechanism is installed at the bottom end of the vertical position of the L-shaped fixing support, the rectifying mechanism comprises an annular flow guide cover, and the propeller is located on the inner side of the annular flow guide cover. According to the ship propeller energy-saving rectifying device with the flow guide wings, through the synergistic effect of the flow guide wings and the rectifying mechanism capable of being dynamically adjusted, the inflow condition of the disc face of the propeller is improved, pre-rotation and non-uniformity of water flow are effectively weakened, and therefore the propelling efficiency of the propeller is improved, and fuel consumption and operation cost are reduced.

The invention discloses a water jet propulsion boat low-speed working condition energy-saving device based on the coanda effect. The water jet propulsion boat low-speed working condition energy-saving device comprises a flow guide plate, a fixed connecting piece and an angle adjusting device. The guide plate is arranged behind a nozzle of the water-jet propeller and is an S-shaped curved surface, the front end is hinged with the fixed connecting piece, and the rear end is hinged with the angle adjusting device; under a low-speed working condition, the guide plate rotates to a folded state, the upper wall surface covers a nozzle of the water-jet propeller and can guide jet flow to flow in a manner of being attached to the guide plate by means of the coanda effect, and the lower wall surface guides circulating vortex in a boat rear wake flow field; under the medium-high speed working condition, the guide plate rotates to a put-down state, the upper wall face is far away from jet flow of the water-jet propeller, and the lower wall face does not generate additional flow field disturbance in the boat body wake flow field. The jet flow of the water-jet propeller and the circulating vortex of the wake flow field of the boat body are guided based on the coanda effect, adverse flow coupling between the jet flow of the water-jet propeller and the circulating vortex is restrained, recycling of effective momentum in the corresponding wake flow field vortex is synchronously improved, and therefore the propelling efficiency of the water-jet propelling boat under the low-speed working condition is improved.

The application provides a variable impulse method for manta ray-like vehicle attitude control through bypass internal flow distribution, a propeller serving as a propelling system and a flow distributor with adjustable position arranged at an outlet end of a power duct module are fused and designed, axial water flow generated by the single propeller is directly used as propelling power and attitude control direct power, the flow of each jetting outlet can be adjusted without changing the propeller rotating speed through position adjustment of the flow distributor arranged at the outlet end of the power duct module, the impulse of water flow of upper and lower jetting outlets is quickly changed, upper and lower thrust difference is formed on the bionic body, the pitching moment is changed without changing the propelling process, the attitude adjustment of the bionic vehicle is accurately realized, and the system efficiency, dynamic response and task adaptability are coordinately improved on the basis of keeping the original propelling efficiency advantage.

The purpose of the present invention is to provide a hull-direct-connection-type propulsion device of a contra-rotating propeller and a method for manufacturing the same, the propulsion efficiency of an electrically propelled ship being greatly improved by disposing the contra-rotating propeller attached to the electrically propelled ship so as to be directly connected to the hull. In order to achieve the purpose, the hull-direct-connection-type propulsion device of the contra-rotating thruster according to the present invention comprises: a contra-rotating thruster comprising a front propeller and a rear propeller; a dual-rotor motor for generating respective rotation directions of the front propeller and the rear propeller; and the double shafts are used for connecting the contra-rotating thruster and the double-rotor motor.

The invention relates to a turbofan engine based on a multi-stage fan, which belongs to the technical field of aviation turbofan engines and comprises an inner duct, an outer duct, a high-pressure compressor system, a low-pressure compressor system, a high-pressure turbine, a low-pressure turbine and a multi-stage fan module. The high-pressure turbine drives the high-pressure compressor through the first transmission shaft, and the low-pressure turbine drives the low-pressure compressor and the multi-stage fan module through the second transmission shaft. And the multi-stage fan module comprises at least three stages of fans, transmits power and performs speed regulation and direction conversion through a gear set arranged on a second transmission shaft, so that the rotation directions of the odd-stage fans and the even-stage fans are opposite, and the rotation speeds of the odd-stage fans and the even-stage fans meet a certain proportional relation. The thrust load of the fan is dispersed to multiple stages of fan blades, so that the load of the fan blades is effectively reduced, the total thrust and the propulsive efficiency of the engine are improved, and meanwhile, the noise is favorably reduced.

The invention belongs to the technical field of floating equipment, and particularly relates to a tethered airship with a propelling device and a conveying system for the tethered airship. A connecting part is arranged on the outer surface of a boat body, a propelling device comprises a horizontal propelling part and a vertical propelling part, the horizontal propelling part is arranged on the peripheral surface of the boat body and used for moving the boat body in the horizontal direction, and the vertical propelling part is arranged on the peripheral surface of the boat body and used for moving the boat body in the vertical direction. The horizontal direction is perpendicular to the vertical direction, and the mooring rope is detachably connected with the connecting part. According to the tethered airship with the propelling device in the technical scheme, the horizontal propelling part is used for providing propelling force in the horizontal direction to achieve the functions of headwind adjustment, yaw control and the like of the airship body, and the vertical propelling part is used for providing pulling force in the vertical direction to achieve height adjustment and pitching control of the airship body. The propulsion device improves the propulsion efficiency of the boat body, and further enhances the wind measurement resistance and attitude stability of the boat body.

The invention provides an underwater propulsion vehicle device with high steering efficiency and low noise, and belongs to the technical field of underwater vehicle propulsion. The invention aims to meet the requirement of changing various sailing postures of the aircraft and ensure high steering efficiency and low noise. The sealed cabin comprises a sealed cabin body, a signal assembly, a lifter assembly and a propeller assembly. The signal assembly and the lifter assembly are installed on the sealed cabin body, and the propeller assembly is installed at the tail of the sealed cabin body. The thruster assembly comprises a rim thruster, a propeller, a transmission shaft component and a rudder component; the transmission shaft component is installed at the tail end of the sealed cabin body, and the propeller is installed on the transmission shaft component. The four rim propellers are distributed in a cross shape, connected with the sealed cabin body through rudder components and installed at the tail contraction position of the sealed cabin body. The condition of unreasonable layout of the rudder and the propeller at the tail contraction section of the aircraft is effectively improved, the problems of flow field disturbance and mutual interference caused by too close distance between the rudder and the propeller are avoided, the propelling efficiency is improved, and the flow noise is reduced.

This invention discloses a high-efficiency, low-noise waterjet propulsion pump, belonging to the field of marine engineering technology. The propulsion pump includes a shroud, a nozzle, a drive shaft, a drive shaft casing, a hub, an impeller, and a guide vane. The shroud and nozzle are connected, and the drive shaft and hub are coaxially connected and supported by the drive shaft casing inside the shroud and nozzle. The impeller and guide vane are fixed to the hub. The inner surface of the constricted nozzle at the rear of the impeller and guide vane has recesses, which are evenly distributed on the inner surface. This invention can reduce the flow resistance of the waterjet propulsion pump and improve propulsion efficiency.

The application discloses a flow field stabilizing mechanism of a double-throat aerodynamic vector nozzle and a control method thereof, which comprises two groups of guide vane arrays arranged in the double-throat aerodynamic vector nozzle and a servo control mechanism located outside the double-throat aerodynamic vector nozzle. When the double-throat aerodynamic vector nozzle is in a working state, according to the profile and flow field structure of the flow channel in the nozzle, the opening angle of the guide vane is adjusted through the servo control mechanism, so that the main flow of the double-throat aerodynamic vector nozzle is stabilized, and the vector performance of the double-throat aerodynamic vector nozzle is ensured, and the propelling efficiency and stability of the double-throat aerodynamic vector nozzle are improved.

An aircraft and an aircraft control method. The aircraft comprises: a fuselage (100), a frame (200), front propellers (300) and rear propellers (400), wherein the frame (200) tilts relative to the fuselage (100) about a pitch axis (001), with a tilt angle being adjustable; and the front propellers (300) and the rear propellers (400) are spaced apart along a longitudinal axis (002), and at least one of the front propellers (300) and the rear propellers (400) tilts relative to the fuselage (100) about an axis parallel to the pitch axis (001), with a tilt angle being adjustable. The frame (200) can tilt relative to the fuselage (100) about the pitch axis (001), thereby preventing the fuselage (100) from tilting and improving the stability of the aircraft. In addition, the tilted frame (200) can enable the front propellers (300) and the rear propellers (400) that are tilted to a horizontal state to be offset in a horizontal direction, thereby reducing aerodynamic interference of the front propellers (300), the rear propellers (400) and the fuselage (100), and ensuring the propulsion efficiency of the aircraft.

To provide a hull direct connection type propulsion device for a reciprocal rotation propeller greatly improving propulsion efficiency of an electric propulsion vessel by being composed so that the reciprocal rotation propeller loaded on the electric propulsion vessel is directly coupled to a hull, and a manufacturing method of the same.SOLUTION: A hull direct coupling propulsion device includes: a relative rotation propeller composed of a front propeller and a rear propeller; a double rotor electric motor generating respective rotational directions in a front propeller and a rear propeller; and a double shaft coupling the relative rotation propeller and the double rotor electric motor.SELECTED DRAWING: Figure 1

The invention relates to the technical field of ducted fans, and provides a ducted fan and a ducted fan unmanned aerial vehicle for fire fighting. The ducted fan comprises a ducted body, a fan body and a fan body, the wheel hub, the stationary blade and the movable blade are arranged in the flow channel, the stationary blade is connected with the wheel hub and the duct body, and the movable blade is rotatably arranged on the wheel hub; wherein the duct body comprises a main body section and a lip section which are arranged in the axial direction and connected, an inlet of the duct body is formed in the end, away from the main body section, of the lip section in the axial direction, an outlet of the duct body is formed in the end, away from the lip section, of the main body section, the inner diameter of the lip section is gradually reduced in the direction from the inlet to the outlet, and the lip section is provided with a plurality of through holes; the multiple through holes are formed in the circumferential direction of the lip section at intervals. According to the technical scheme, the pressure difference between the windward side and the leeward side of the lip area of the duct body can be reduced, the lateral resistance borne by the ducted fan is reduced, and then the propelling efficiency of the ducted fan is improved.

The invention belongs to the technical field of motors, and particularly relates to a rotary exposed electrostatic motor with an embedded stator and an aircraft, the rotary exposed electrostatic motor comprises a stator module, a rotor module, a bearing assembly, a charge transfer assembly and a power supply assembly, the stator module is embedded in the inner side of a bearing, and the rotor module sleeves the outer side and is partially exposed; the rotor blades can directly drive an external load to rotate, the power supply assembly enables the adjacent stator blades to be electrified alternately to form a driving electric field, and the charge transfer assembly achieves charge exchange during rotation so as to drive the rotor module to rotate. According to the structure, direct output of energy is achieved through the layout that the stator is embedded and the rotor is exposed, mechanical transmission loss is reduced, energy conversion efficiency is improved, and when the structure is applied to an aircraft, a motor can directly drive a propeller to generate thrust, the gravity center of the aircraft is lowered, and attitude stability and propelling efficiency are improved.

The invention discloses a compressible fluid reducing vortex method and device, and belongs to the technical field of fluid machinery and jet propulsion. The problems that in the prior art, the energy loss is large, the efficiency is low, and the gas temperature is sharply increased in the compression process are solved. Efficient and controllable conversion among fluid pressure energy, internal energy and kinetic energy can be achieved, an air injection device based on the method can more fully convert heat energy into directional injection kinetic energy through the synergistic effect of acceleration and vortex elimination guide vanes, and the propelling efficiency is remarkably improved; and the stable recovery and conversion of kinetic energy are realized through vortex expansion, and an approximately isentropic mild pressurization process can be realized, so that the temperature rise is obviously inhibited, and the compression energy consumption and the cooling requirement are fundamentally reduced.

The utility model discloses a catamaran propelling device which comprises a catamaran body (1), a paddle propelling device (2), a deck (3), paddles (4), a gear (5), a chain (6), a roller (7), an inner chain plate (8), a sleeve (9), a pin shaft (10), an outer chain plate (11) with paddles and an outer chain plate (12) with paddles. The paddles are driven through rotation of the chain, and the catamaran is pushed to move through interaction of the paddles and water. Water flow between the two ship bodies can be adjusted and rectified, the flowing state of the water flow is changed, and resistance received by the catamaran is reduced. Due to the action characteristics of the paddles, cavitation bubbles can be reduced, the propulsion efficiency is improved, and the navigation stability and the operation performance of the ship are improved.

The invention discloses a gearless propulsion device suitable for a ship in an ice region, which comprises a main bracket for supporting and connecting; the propelling assembly is used for providing propelling force; the steering assembly is used for providing adjustment of the propelling direction; when the ship sails, the propelling assembly is used for propelling the ship to sail, and when the direction needs to be adjusted, the steering assembly is used for adjusting the direction. According to the device, the energy loss in the transmission process is reduced by canceling a gear box and shortening the shafting length, so that the propulsive efficiency is improved. The multi-stage connecting rod is adopted for power transfer, small torque and high rotating speed output by the steering motor can be converted into motion with large torque and low rotating speed needed for driving the large rudder blade, power transfer is more direct and efficient, ships or equipment can obtain better power performance, the device is suitable for low-speed operation of the ships in the ice area, and the service life of the ship is prolonged. The gearless design eliminates gear meshing noise and vibration, reduces tip vortex cavitation bubbles and turbulence noise, and meets the requirement of a high-silence scene.

The utility model discloses a kind of ship body structure and ship of wave can be pressed, wherein a kind of ship body structure including wave can be pressed comprises: ship body and wave plate. The ship body includes stern plate and ship body, the stern plate is located in the tail of the ship body, the bottom of the ship body has propeller tunnel;The wave plate is set on the stern plate, the wave plate is located in the tail end of the propeller tunnel, part structure of the wave plate overlaps with the stern plate, another part of the wave plate is located in the tail end of the propeller tunnel. The wave plate is set on the stern plate of ship body, simultaneously part structure of the wave plate is located in the tail of propeller tunnel in the bottom of the ship body, so when ship starts, the wave plate can suppress the upward rolling wake formed by propeller rotation, to reduce the resistance formed by propeller rotation to tail wave, to effectively improve the propulsion efficiency of propeller.

The coupling propulsion structure comprises a propeller arranged at the tail end of the tail of an aircraft and the semicircular empennage, the semicircular empennage starts from the lower portion of a wing and extends upwards along an arc path to exceed the propeller at the tail end of the tail of the aircraft, and a semicircular pneumatic structure is formed in a vertical plane; wherein the highest point of the front edge of the semi-annular empennage is located in the vertical plane of the longitudinal axis of the fuselage, and the minimum vertical height L from the highest point of the front edge of the semi-annular empennage to the tip of the propeller is equal to 0.1-0.2 time of the radius R of the tip of the propeller. According to the coupling propelling structure special for the semi-annular empennage, the propelling efficiency of the propeller can be remarkably improved by optimizing the coupling relation between the propeller and the semi-annular empennage, and meanwhile the coupling propelling structure has the structural advantages of the semi-annular empennage.

The invention discloses a ship electric propulsion efficiency evaluation method and system based on multi-modal data fusion, and the method comprises the steps: obtaining a blade cavitation corrosion image of a propeller, and constructing a multi-modal propulsion state data set through space-time alignment in combination with ship state parameters and electric propulsion parameters; extracting structural dynamic characteristics and electric propulsion state characteristics of the propeller, and fusing to generate a real-time propulsion state characteristic vector; based on the real-time propulsion state feature vector and the multi-modal propulsion state data set, obtaining a real-time propulsion efficiency estimated value and a corresponding propulsion efficiency risk level through a pre-constructed efficiency evaluation model; performing risk association analysis in combination with an efficiency risk mode library, determining an efficiency risk mode and associated data, and further obtaining a data adjustment amount through efficiency trend association analysis; and finally, generating a ship evaluation result according to the data adjustment amount and the efficiency risk mode so as to improve the comprehensiveness of ship evaluation.

The invention relates to the technical field of robot manufacturing, in particular to an underwater robot motion performance optimization method, device and equipment and a medium. The structure of the robot is optimized according to fluid dynamics so as to research the hydrodynamic characteristics of the propulsion system, and reference is provided for optimizing the structure of the underwater robot propulsion system and improving the flexibility and efficiency of movement of the underwater robot propulsion system. The thrust, the lateral force and the total resistance of the underwater robot driving device are directly extracted, complex formula derivation is not needed, the performance of different working modes of the propeller is verified respectively, the open water performance of the underwater robot can be visually and conveniently observed from a simulated diagram, and the method has the advantages of being high in practicability and easy to popularize. In addition, the simulation result of the robot performance is compared with pool test data to correct the robot model, so that the structure of the underwater robot is visually optimized. The propulsive efficiency of the underwater robot in different modes is calculated, and the problems of fluid resistance and delayed maneuvering response are solved according to the propulsive efficiency.

This invention belongs to the field of electronic digital data processing and discloses a propulsion modeling method for FPSOs based on Modelica, comprising the following steps: S1: Modeling the propulsion coefficient model of the propeller, including calculating the following parameters: thrust coefficient, thrust torque coefficient, thrust gain coefficient, and thrust torque gain coefficient; S2: Modeling the propeller performance model, including calculating the following parameters: wake coefficient, advance number, thrust loss coefficient, and relative rotational efficiency; S3: Based on the results of steps S1 and S2, outputting the thrust and thrust torque of the propeller, thereby obtaining the propulsion efficiency of the propeller. This method can comprehensively simulate the thrust and torque variation characteristics of the propeller under different operating conditions through a discrete dynamic modeling approach, thus providing accurate simulation support for the dynamic response of FPSO systems in complex marine environments.

This application discloses a marine propulsion system and a vessel. The marine propulsion system comprises a frame; at least two propulsion mechanisms detachably connected to the frame; the propulsion mechanisms comprise a power mechanism and a propeller connected to the power mechanism, the power mechanism providing power to the propeller to rotate. In this manner, this application improves the propulsion efficiency of the marine propulsion system, expands its application range, and reduces costs.

The invention provides a bionic propeller based on a dolphin dorsal fin shape blade section and a paddle, the blade section of the paddle comprises a blade back and a blade surface, the blade back comprises two body parts and a dorsal fin part located between the two body parts, one ends of the two body parts are connected to the two opposite ends of the blade surface respectively, and the other ends of the two body parts are connected to the dorsal fin part. The dorsal fin part comprises an ascending section and a downward bent section which are sequentially connected in the blade width direction of the paddle, and the end, away from the downward bent section, of the ascending section and the end, away from the ascending section, of the downward bent section are connected with the other ends of the two body parts correspondingly, so that a wing-shaped structure in the shape of a dolphin is formed. The problems of insufficient performance and cavitation effect of a traditional propeller can be solved, so that the propelling efficiency of the propeller is improved.