44 results about "Wave force" patented technology

The invention provides a composite tension sand blocking and silt reducing facility and method.The facility is composed of one or more units, each unit comprises a floating body, a composite tension curtain and an anchor point located at the bottom of a water body, one end of the composite tension curtain is connected to the floating body, and the other end of the composite tension curtain is connected to the anchor point; the composite tension curtain forms a sand blocking surface in the water between the bottom of the water body and the floating body by virtue of the buoyancy of the floating body, and the floating body is positioned on the water surface or suspended in the water; the composite tension curtain is formed by sewing two layers of geotechnical cloth together, a plurality of steel cables are inserted between the two layers of geotechnical cloth, a composite tension structure is formed to serve as a sand blocking and silt reducing curtain face, and main water flow force and wave force are borne by the steel cables. The flexible sand blocking curtain structure facility is economical, convenient to construct, suitable for large flow velocity and wave conditions and capable of blocking sand and reducing silt.

The invention discloses a ship maneuverability prediction method, a ship maneuverability prediction system and a ship maneuverability prediction device taking propeller performance changes into regular waves. The method comprises the following steps: firstly, calculating the motion response, the second-order wave drift force and the drift moment of a ship body under different regular wave conditions based on a potential flow theory, establishing a wave force fitting equation taking the wave direction and the navigational speed as variables, and performing ship manipulation motion numerical simulation in regular waves based on an obtained calculation result; acquiring an input parameter range of the propeller in a manipulating motion state; establishing a CFD numerical model of ship propeller performance in regular waves, simulating heaving and pitching motion of the propeller under motion response, determining the range of the heaving and pitching motion, and calculating propeller thrust data under different wave conditions and input parameters; and carrying out regression analysis on the propeller thrust data, and fitting to obtain a prediction formula of the propeller thrust coefficient in the regular waves. The formula couples the wavelength-to-length ratio, the advance speed coefficient and the wave direction angle, and quantifies the dynamic influence of the wave on the propeller thrust.

The invention belongs to the technical field of calculation of horizontal bearing capacity of foundations, and particularly discloses and provides an accurate calculation method for horizontal bearing capacity of an offshore wind power foundation, which comprises the following steps: integrating wave spectrum, wind regime, tide and soil mass parameters to form a multi-dimensional data set; a three-dimensional pile-soil model is constructed, and wave force and wind load are coupled; calculating a stiffness coefficient and identifying a pile body type in combination with a length-diameter ratio; quantifying an environment deviation compensation coefficient according to the pile body type; after the initial horizontal bearing capacity is calculated, the bearing capacity failure critical state is judged based on real-time displacement monitoring data, and if the critical state is reached, the initial bearing capacity is corrected through linear weighting of the displacement deviation compensation coefficient and the environment deviation compensation coefficient. According to the method, the time-varying environment load is dynamically coupled, the pile-soil interaction is finely simulated, a rigidity self-adaptive grading mechanism and a double compensation feedback system are established, and the calculation precision and the real-time early warning capability of the horizontal bearing capacity in the complex marine environment are remarkably improved.

The invention relates to the technical field of ocean engineering, in particular to a wave force estimation method which can accurately predict a circular rod piece and the like in an ocean structure located in an area near a free surface, and is particularly suitable for wave force estimation of a cylindrical structure horizontally arranged in an extreme wave environment under the action of transient strong nonlinear waves. The wave load calculation method for the near-free-surface cylindrical structure in the marine environment specifically comprises the steps that a wave force calculation model is established based on a classical Morrison equation, a focused wave field is constructed, focused waves are constructed by superposing a plurality of regular wave components, and the focused wave field is constructed by superposing a plurality of regular wave components; compared with the prior art, the method has the advantages that the applicability is wider, broadband multi-component focused wave field modeling can be effectively processed, and the method is particularly suitable for being applied to engineering early-stage design and parameter sensitivity analysis.

The invention relates to the technical field of ocean engineering, in particular to a method for acquiring a wave force load of a cylindrical structure under a complex array in an ocean environment, and the method is used for improving the safety and reliability of an engineering structure. According to the method, the phenomena of non-uniform distribution and local amplification of wave force borne by a single component due to interaction between waves and a hydrodynamic interference effect in an array structure are considered, a wave force calculation model is determined through combination of numerical simulation and a physical test, and the wave force is calculated through the model provided by the invention. According to the method, the wave force load of the independent cylindrical structure in the original array can be rapidly obtained, and experiments prove that the method is high in precision and small in error and can provide reliable basis for engineering construction.

The invention relates to a wave flow water tank test device and method for impact of a solitary wave on a deep sea wind power jacket foundation structure, and the device comprises a water tank, a solitary wave generation device, a wave dissipation grid, a wave height meter, a pressure sensor, a high-speed camera, a jacket foundation model, a cement platform base, and a data collection device. The solitary wave generating device is arranged in the front-end concrete section, the jacket foundation model is installed in the middle test section through the cement platform base, the wave dissipation grid is arranged in the rear-end concrete section, and a plurality of wave height meters are arranged on the front side of the jacket foundation model and used for monitoring the wave height of the head wave face of a jacket. A plurality of pressure sensors are uniformly arranged on the jacket basic model and are used for measuring the wave force borne by the local structure of the jacket; the wave height meters and the pressure sensors are electrically connected with the data acquisition device. The device and the method can effectively simulate and measure the impact effect of different forms of solitary waves on the deep and far sea wind power jacket model.

The application relates to the technical field of ocean engineering, in particular to a wave load calculation method for a near-free-surface cylindrical structure in a marine environment, which can accurately predict a circular rod and the like in a marine structure located in a region near a free surface, is especially suitable for wave force estimation of a horizontally arranged cylindrical structure under the action of transient strong nonlinear waves in an extreme wave environment, and improves the precision of structure stress prediction and the safety of engineering design, and specifically comprises the following steps: a wave force calculation model is established based on a classic Morison equation, a focused wave field is constructed, wherein the focused wave is constructed by superimposing multiple regular wave components, so that an idealized free liquid surface profile is formed, and then horizontal wave force and vertical wave force are respectively calculated in the focused wave field, compared with the prior art, the method has wider applicability, can effectively process wide-frequency multi-component focused wave field modeling, and is especially suitable for application of engineering early design and parameter sensitivity analysis.

The application belongs to the technical field of foundation horizontal bearing capacity calculation, and specifically discloses a kind of offshore wind power foundation horizontal bearing capacity accurate calculation method, the method comprises: integrating wave spectrum, wind condition, tide and soil parameters to form multidimensional data set;Three-dimensional pile soil model is constructed and wave force and wind load are coupled;Stiffness coefficient is calculated and combined with length-diameter ratio to identify pile type;According to the type of pile, the environmental deviation compensation coefficient is quantified;After calculating the preliminary horizontal bearing capacity, the bearing capacity failure critical state is judged based on real-time displacement monitoring data, if the critical state is reached, the preliminary bearing capacity is modified by linear weighting of displacement deviation compensation coefficient and environmental deviation compensation coefficient.The application dynamically couples time-varying environmental load, simulates the interaction between pile and soil in detail, establishes a stiffness self-adaptive grading mechanism and a double compensation feedback system, significantly improving the accuracy and real-time warning capability of horizontal bearing capacity calculation in complex marine environment.

The invention discloses a device and a method for synchronously measuring wave force and pile foundation scouring in real time, the device is used for a single-pile physical model in an ocean structure, the device comprises a vertical cylinder, an upper cylinder, a lower cylinder, a fixed pulley, a slidable bolt, a fixed chassis, a high-elastic rubber pipe and a steel wire rope, and a gap is reserved between the upper cylinder and the lower cylinder; when the bottom round hole of the upper cylinder and the top round hole of the lower cylinder are aligned by utilizing the slidable bolt, the bolt is automatically located in the lower cylinder under the traction of the high-elastic rubber tube on the fixed chassis, and the wave force borne by the cylinders can be measured after the force sensor is fixed at the top end of the upper cylinder. After the lower cylinder is buried in a sand bed, pile foundation scouring can be achieved under the condition of incoming waves and incoming flows. The device can simultaneously complete measurement of wave force and pile foundation scouring, solves the problem that pure wave force cannot be measured due to bottom bed stress after the pile foundation is buried in a sand bed, can better reproduce actual conditions faced by the pile foundation of an ocean structure, and lays a foundation for wave force research under pile foundation scouring.

The present application relates to a kind of simple calculation method of shallow foundation and clay seabed interface failure time under extreme storm surge action.The technical scheme is: measuring the roughness R of shallow foundation a , making structure;Collecting seabed clay at shallow foundation, carrying out dynamic simple shear test, test structure and the initial undrained shear strength S of clay interface u ;Select and set 0.4S u , 0.6S u , 0.8S u And 1S u As the typical amplitude of extreme storm surge load;Measured structure and the corresponding period number N of clay interface failure;Fitting extreme storm surge load amplitude and period number N logarithmic curve;According to wave force calculation formula, load amplitude is calculated;The amplitude is substituted into logarithmic curve and the corresponding period number N of interface failure and failure time are obtained.The present application can calculate the failure time of shallow foundation and seabed interface under extreme storm surge, provide the time length of shallow foundation against storm surge, determine the stability of shallow foundation, provide feedback for whether the shallow foundation of engineering site needs to be reinforced to resist extreme storm surge.

The invention relates to the technical field of wave power generation, in particular to a wave power generation conversion device and a power generation system.The wave power generation conversion device comprises a floating body and a pull rod assembly connected into the floating body in a sliding mode; at least one power generation unit and at least one resonance unit are installed in the floating body, the power generation unit is in power connection with the pull rod assembly, when the floating body floats up and down, the pull rod assembly drives the power generation unit to generate power, and the resonance unit is used for generating power when the floating body floats up and down. According to the wave power generation device, the floating body floating on the water surface is adopted, relative movement is generated between the floating body and the pull rod assembly under driving of up-and-down fluctuation of the waves, the power generation unit is driven by means of the movement to generate power, and therefore the purpose of wave power generation is achieved; and secondly, the resonance unit is matched with the relative movement between the pull rod assembly and the floating body, more wave energy can be captured, the floating body and waves generate resonance, and more energy is captured for power generation.

The invention discloses a method for calculating the hydrodynamic force value of a posture-adjustable culture net cage, and the method comprises the steps: defining a wave field where the net cage is located, and setting the wave coverage range, the seabed range and the water depth where the net cage is located; establishing a net cage frame finite element model; establishing a netting finite element model; establishing a net cage mooring system model; environment variables are defined, and ocean current waves are simulated; loading the attitude parameters of the net cage; solving the motion response and the structure stress of the net cage; and comparing and analyzing each attitude motion response and structure stress difference of the net cage. Wherein the step of establishing the net cage frame finite element model comprises the substeps of defining circular tube nodes and section attributes; and performing beam unit simulation, and calculating the wave force by using a Morison equation. And establishing a netting finite element model, namely simulating the netting by adopting an equivalent surface unit, defining compactness parameters, and calculating resistance and lift force by using a screen model.

The application belongs to the field of hydrodynamic calculation of ocean engineering, and particularly relates to a liquid surface grid modeling method for wave force analysis of a small water plane TLP wind turbine platform, comprising the following steps: determining a free liquid surface outer radius and a high-density grid area radius; constructing a high-density area within the high-density grid area radius; taking the center of the wind turbine platform as an origin, constructing a star-shaped structured grid framework according to the number and layout of the platform columns, and performing grid division on the free liquid surface in the star-shaped structured grid framework according to the maximum grid length; establishing a transition area between the high-density grid area radius and the outer boundary of the transition area, and establishing an edge area between the outer boundary of the transition area and the free liquid surface outer radius; and performing grid division on the transition area and the edge area by using a concentric ring division method; and obtaining a free liquid surface calculation model based on the high-density area, the transition area and the edge area after grid division. The application can significantly improve the calculation accuracy of the second-order wave force under extreme sea conditions.

The invention discloses a damping control method for wave force prediction based on AUKF, and belongs to the technical field of wave power generation. The method provided by the invention comprises the following steps: acquiring wave time domain data and calculating exciting force; constructing a state space model taking the instantaneous parameter of the exciting force as a state quantity; the instantaneous frequency and amplitude of the exciting force are estimated online in real time by adopting an AUKF algorithm, and the AUKF algorithm dynamically and adaptively adjusts a noise covariance matrix through an innovative sequence so as to improve the estimation precision and stability; and finally, dynamically calculating and outputting an optimal damping coefficient according to the estimated instantaneous frequency, so that the impedance of a wave energy converter (WEC) is matched with the current sea condition, and maximum power capture is realized. According to the method, the problems of poor adaptability, low precision and insufficient stability of a traditional fixed damping or EKF / UKF-based control method under complex and time-varying sea conditions are solved, and the energy capture efficiency of wave energy and the robustness of a control system are remarkably improved.

A method for calculating the high-frequency resonance response of waves and tall structures includes obtaining dimensional information of the tall structure and calculating wave information within the water area; performing a third-order perturbation expansion on the translational component, rotational component, velocity potential, and wave surface rise; establishing a nonlinear time-domain mathematical model of the interaction between waves and the tall structure based on the third-order perturbation expansion and the obtained dimensional and wave information; obtaining the velocity potential using the nonlinear time-domain mathematical model; and then using the velocity potential to obtain the wave force and motion response of the high-frequency resonance response of waves and tall structures. The advantages of the present invention are that the use of the nonlinear time-domain mathematical model not only enables the study of the high-frequency resonance response of waves and tall structures, but also improves the computational efficiency of model testing; the nonlinear time-domain mathematical model also takes into account the effects of nonlinearity, resulting in higher accuracy in the calculation results of the high-frequency resonance response of waves and tall structures.

The present application belongs to the technical field of offshore wave energy power generation, and specifically relates to a multi-dimensional pendulum wave energy power generation device and its energy acquisition method. The device includes an outer pendulum body, an energy-capturing swing mechanism, a base and an inner pendulum body, wherein the energy-capturing swing mechanism is composed of a plurality of hydraulic rods, a swing arm bracket and an energy conversion system. The base is connected to the wind turbine floating platform, and the energy conversion system is connected to the hydraulic rods through pipelines to convert hydraulic energy into electrical energy. The outer pendulum body is a hemispherical shell that can capture the multi-dimensional force of waves; the inner pendulum body includes a linear motor, a rotating shaft and a reversing rod, and the reciprocating motion of the linear motor drives the energy conversion system to generate electricity. The present application solves the problems of low energy conversion efficiency and instability of existing wave energy devices. Through the coordinated movement of the outer pendulum body and the inner pendulum body, as well as the capture of multi-dimensional wave forces and the flexible hydraulic system structure, the wave energy conversion efficiency is improved, the anchoring and structural layout are optimized, and the utilization efficiency of the sea area is improved.

The present application provides a kind of breakwater wave force real-time calculation method and system, it is related to port safety monitoring technical field.The method is by wave monitoring sensor array and structural response monitoring sensor network synchronous acquisition wave parameter and structural response data;Based on wave parameter and initial wave force calculation model, obtain initial wave force value;Utilize structural response data through structural mechanics model conversion and numerical difference analysis, obtain error signal;Combined with error signal and environmental state monitoring data, using reinforcement learning algorithm dynamically adjusts model parameter;Finally, based on the model parameter of optimization, recalculate to obtain real-time wave force value.The present application realizes the dynamic correction and self-adaptive optimization of wave force calculation, effectively improves the accuracy and real-time of breakwater safety monitoring.

This invention discloses a float-type power generation device that combines wave and current utilization, addressing the technical problems of single-source marine energy utilization and low power generation efficiency in existing power generation devices. It includes a float power generation component, a turbofan power generation component, and a support column. During operation, the float, under the influence of wave forces, undergoes relative oscillation motion with the support column. A hydraulic cylinder, driven by a rigid disc, converts the mechanical energy absorbed by the relative motion into hydraulic energy. The hydraulic energy is converted into kinetic energy by a rotating hydraulic motor, which in turn drives a generator to generate electricity. The turbofan power generation component is rigidly connected to the support column. During the oscillation motion of the float, the turbofan, under the influence of ocean current forces, maintains rotation in one direction, continuously generating electricity through a transmission mechanism. The turbofan and float hydraulic systems each employ an independent transmission mechanism, enabling effective comprehensive utilization of wave and tidal energy and improving the utilization rate of marine energy. The device's transmission system has a simple structure and high energy transfer efficiency.

The application provides a short-crested wave dynamic response analysis method and system based on a finite volume method, a short-crested wave model is established based on wind wave characteristic parameters under different sea states and ship motion state parameters, a first wave surface equation is calculated under a ground coordinate, a coordinate and frequency conversion method is used to convert the first wave surface equation under the ground coordinate system into a ship body stable coordinate system, a second wave surface equation suitable for the environment around the ship is obtained, a wave-induced pressure model caused by the sea wave is established, a Smith correction term method is used to correct the wave-induced pressure model, and a multi-wave superposition wave-induced pressure model is obtained through a harmonic superposition analysis method; finally, a generalized disturbance force is constructed based on the finite volume method, the dynamic response of the ship in the wind wave can be more accurately predicted, the wave force on the complex ship body can be effectively modeled and simulated, and the calculation precision is effectively improved.

The objective is to provide wave power generation equipment with construction costs kept to a level that does not hinder widespread adoption. [Solution] The wave power generation device 1 of this embodiment comprises a floating body 2 having a specific gravity less than seawater, an installation body 3 held in the sea, a power generation device 4 fixed to the installation body 3, an anchor weight 6 installed on the seabed, and a wire rope 7 connecting the installation body 3 and the anchor weight 6. The floating body 2 is provided with a rack gear 14, and the power generation device 4 is provided with a pinion gear 19. The rack gear 14 and the pinion gear 19 mesh together, and as the floating body 2 moves up and down due to wave force, the pinion gear 19 rotates and the power generation device 4 generates electricity.

This application relates to the field of marine engineering technology, and discloses a floating breakwater with a resonant cavity and its hydrodynamic performance analysis method. The method includes: constructing a floating breakwater model; determining the target length and target width of the resonant cavity, the wave-facing open-type wave-dissipating chamber, and the wave-repelling open-type wave-dissipating chamber on the leeward side; dividing the entire fluid domain of the floating breakwater into multiple regions; obtaining the velocity potential of each region; calculating the wave force of the floating breakwater; using the velocity potential of each region to express the added mass and radiation damping of the floating breakwater when it undergoes unit forced oscillation, so as to construct the motion response equation of the floating breakwater in the frequency domain under wave action; obtaining the transmission coefficient and energy dissipation coefficient of the floating breakwater through the equation set, and evaluating the shielding performance and wave-dissipating performance of the floating breakwater based on each coefficient. The synergy of the resonant cavity and the open-type wave-dissipating chamber can improve the wave-dissipating efficiency, and the analysis method can provide an efficient and reliable basis for the design of breakwaters.

This invention relates to the field of breakwater technology, specifically to a floating breakwater structure integrating aquaculture, wave dissipation, and power generation. It includes buoys and multiple side floats. Each side float has a vertical breakwater plate detachably connected to its bottom symmetrically. A side fixing plate is detachably connected to one side of each vertical breakwater plate at equal intervals. A horizontal column is detachably embedded in the side fixing plate, and a movable locking block slides through the column. Multiple movable locking blocks share a common connecting column. Vertical columns are equidistantly embedded in the vertical breakwater plate, and side breakwater plates are movably connected to each column at symmetrical positions. The other end of each side breakwater plate is rotatably connected to a connecting column. In this invention, when the first spring is stretched and the second spring is compressed to a certain extent, the first and second springs return to their initial triangular state between the two side breakwater plates and the vertical breakwater plate. At this point, the impact force of the waves forces the side breakwater plates to repeat the above movement, continuously reciprocating to achieve the wave dissipation effect.

The invention discloses an elastic anchor cable capable of self-adaptively stretching along with tide level change, and relates to the field of ocean engineering. The elastic anchor cable comprises a hydraulic telescopic assembly, an elastic telescopic assembly, an anchor cable body and an anchoring end. The hydraulic telescopic assembly comprises a hydraulic cylinder and a piston rod, and the hydraulic cylinder is connected with a hydraulic control system. The hydraulic telescopic assembly and the multiple elastic telescopic assemblies are connected in series and integrated, so that the problem that a traditional anchor cable cannot adapt to the slowly-changing tide level and the rapidly-changing wave force at the same time is solved. The hydraulic telescopic assembly initiative adjusting part initiatively stretches out and draws back to compensate tide level changes; the multiple elastic telescopic assemblies serve as passive adjusting parts, impact energy of waves is passively buffered and absorbed through elastic deformation of elastic pieces, peak tension caused by dynamic wave force is smoothed, and instantaneous overload is prevented. According to the floating breakwater, the maximum anchoring force transmitted to the anchoring end is reduced, so that the requirement for an anchoring foundation is reduced, and meanwhile the viability and the wave absorbing stability of the floating breakwater under the severe sea condition are greatly improved.

The invention discloses a mathematical model-based wave visual simulation method and simulation system. The mathematical model-based wave visual simulation method comprises the following steps of: constructing a consistent wave spectrum model; initializing a wave spectrum model, and calculating and generating a wave amplitude array; acquiring the position, speed and course of the ship, and calculating encounter frequency; a wave height field is calculated and generated, and the height of encountered waves is calculated according to the position of the ship; wave force is calculated, the wave height field is accelerated through a GPU to generate a wave height map, and a wave scene is generated; calculating the position, speed, course and attitude of the ship, and updating the three-dimensional model display of the ship; according to the method, the problem that visual simulation and a dynamic response model are disjointed is effectively solved, the ship motion visual scene is highly consistent with a physical calculation result, immersive ship motion visual scene experience can be provided for a user, real interaction between a ship and waves can be accurately simulated, and the ship motion visual scene experience is improved. The practical value of visual simulation in the fields of ship control system design, seakeeping analysis and sailor safety training is improved.

The present invention provides a wave inertial-force electricity generating apparatus configured to receive an energy of a wave on a water surface and including a main body unit, a mass unit, and an energy conversion unit. The main body unit includes a main body disposed on the water surface, a surrounding wall disposed at the main body and enclosing an accommodating space, and a fixed body connected to the main body, where the main body is pushed by the wave to move with respect to the fixed body, and the fixed body is configured to limit a movement range of the main body. The mass unit includes a mass body movably disposed in the accommodating space, where the mass body is pushed by the main body to move inertially in the accommodating space. The energy conversion unit includes an electricity generating module disposed at the main body and connected to the mass body, where the electricity generating module absorbs an inertial force of the mass body and converts the inertial force to electricity. Therefore, a wave force can be obtained for electricity generation while the coastline is protected.

The invention provides a wave power generation method and system with a self-protection function, and the method comprises the steps: obtaining an original image of each power generation unit in real time, and obtaining the number of available power generation units through image recognition; and if the available quantity is greater than zero, monitoring wave information and judging whether the sea condition is an extreme sea condition. Normal power generation is carried out in non-extreme sea conditions; and if the sea condition is the extreme sea condition, entering a self-protection mode. In the mode, a self-protection electromagnetic torque instruction is generated according to the real-time wave force and a preset threshold value, then q-axis and d-axis current instructions are obtained, a generator is driven to enable a floater to actively jump, and power generation self-protection is achieved. According to the wave energy power generation method and system with the self-protection function, available power generation modules are judged through image recognition, the floater is actively controlled to jump to avoid wave impact, and the reliability, safety and power generation efficiency of a wave energy power generation device in a complex marine environment can be effectively improved.

The present invention discloses a wave dynamic response analysis method for marine structures based on ABAQUS-OpenFOAM. The present invention establishes a fluid-solid coupling algorithm based on the two calculation modules of ABAQUS and OpenFOAM, develops a fluid-solid coupling interface data transfer interface, and realizes the new function of ABAQUS-OpenFOAM coupling analysis. The present invention first uses OpenFoam to carry out wave dynamic analysis to obtain the pressure field data group of all discrete grid nodes in the fluid calculation area; then establishes KDTree to store the pressure field data group in blocks to achieve the purpose of rapid retrieval of pressure field data; then establishes a dynamic analysis model of the marine structure in ABAQUS. KDTree is used to quickly obtain the wave force at a certain spatial position, and the wave force is transferred to ABAQUS through the custom subroutines Displ() and Dload(), and applied to the surface of the marine structure as a boundary condition; finally, ABAQUS is used to analyze the dynamic response characteristics of the marine structure under the impact of waves, including displacement, pore water pressure and effective stress, and then the stability of the marine structure is evaluated.

The invention belongs to the field of ocean engineering, and particularly discloses a floating type wind power-gyro device coupling dynamic response analysis method which comprises the following steps: decoupling a Cummins equation and estimating a state space model; establishing a gyroscope device dynamic model; establishing a floating type wind power-gyro device coupling dynamic equation based on the coupling dynamic equation; and calculating the reaction torque of the gyro device to the floating type wind power structure, combining the reaction torque with the wave force, substituting the combined reaction torque into a state space model formed by the equivalent state space model and the coupling dynamic equation, and calculating the coupling motion response of the floating type wind power-gyro device. According to the method, the dynamic response of the coupling system can be accurately analyzed, and theoretical support is provided for design of a gyro device and effective suppression of pitching motion of a floating type offshore wind power structure.

The invention relates to the technical field of ocean engineering, and discloses an energy dissipation floating breakwater with a resonance type cavity and a hydrodynamic performance analysis method of the energy dissipation floating breakwater. Respectively determining target lengths and target widths of the resonant cavity, the wave head side perforated wave dissipation chamber and the wave back side perforated wave dissipation chamber; the whole fluid domain of the floating breakwater is divided into a plurality of areas; solving the speed potential of each region; calculating the wave force of the floating breakwater, and expressing the additional mass and radiation damping when the floating breakwater performs unit forced oscillation by utilizing the speed potential of each region so as to construct a motion response equation of the floating breakwater in a frequency domain under the action of waves; the transmission coefficient and the energy dissipation coefficient of the floating breakwater are obtained through the equation set, and the shielding performance and the wave dissipation performance of the floating breakwater are evaluated according to all the coefficients. The cooperation of the resonant cavity and the perforated wave dissipation chamber can improve the wave dissipation efficiency, and the analysis method can provide an efficient and reliable basis for the design of the breakwater.

The invention relates to the technical field of aquatic culture, in particular to a liftable net cage with a wave dissipation function and a use method thereof. Comprising a cross beam; the inclined struts are fixedly connected between the cross beams; the pile column is vertically and fixedly connected below the cross beam; the pile legs are slidably connected to the bottoms of the piles; and the control rods are rotationally connected into the piles. Compared with the prior art, the structure can overcome the defects that a traditional breeding unit is poor in wave resistance and prone to being damaged in a strong wave environment, wave force transmitted to the breeding unit is reduced through the wave energy dissipation effect of the overall rigid structure and the inclined strut net-shaped face, the stability and safety of the breeding unit are enhanced, and the breeding unit can be used for breeding a large number of breeding plants. The service life of the device in a complex marine environment can be prolonged; and in combination with the height function of the net-shaped surface capable of being adjusted along with the tide level in a linkage manner, the wave dissipation structure is always located at the optimal working position, and the adaptability and the buffering effect under the severe sea condition are further improved.