76 results about "Wave force" patented technology

The invention belongs to the technical field of port, coast and offshore engineering breakwaters, and discloses a method and system for evaluating the stability performance of a wave dissipation embankment of a combined seawall. The method comprises the steps of obtaining hydrological data of an area where the combined seawall is located and structural section data of the combined seawall, establishing a wave power numerical model, and performing breakwater body wave climbing simulation and breakwater top wave overtopping simulation on the target combined seawall by adopting the wave power numerical model, the wave force and the wave moment of the breakwater are obtained through calculation, and a wave load index is determined; calculating the self gravity of the wave dissipation embankment of the target combined seawall, the connection force between the wave dissipation embankment and the slope type seawall and the moment of the wave dissipation embankment to the overturning fulcrum to obtain the gravity and the gravity moment of the wave dissipation embankment, and determining the structural index of the wave dissipation embankment; and according to the wave load index and the wave dissipation embankment structure index, the anti-tilting stability and anti-sliding stability safety coefficients are calculated. According to the invention, the accuracy of disaster early warning is improved. The practical application value is realized.

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 discloses a deep learning-based wave force sensing modeling ship control motion forecasting method, which comprises the following steps of S1, pre-data processing: cleaning and standardizing original data; s2, secondary interpolation: estimating an intermediate value through the secondary interpolation step so as to better represent the continuous effect of the wave force and improve the time resolution of input data; and S3, LSTM network prediction: processing refined data to predict ship maneuvering motion, utilizing the advantage of the LSTM network in the aspect of capturing time dependence and having robustness for interpolation input, providing a robust mathematical model to predict ship maneuvering characteristics under wave interference under deep water and shallow water conditions, and improving the ship maneuvering performance. By adopting an improved LSTM model of three times of splicing interpolation, the method proves reliable prediction capability in the aspects of eliminating wave height, direction and current speed, and the method has relatively high accuracy and can improve navigation safety and reduce economic risks.

The invention belongs to the technical field of offshore wave energy power generation, and particularly relates to a multi-dimensional swing type wave energy power generation device and an energy obtaining method thereof.The device comprises an outer swing body, an energy capturing swing mechanism, a base and an inner swing body, the energy capturing swing mechanism is composed of a plurality of hydraulic rods, a swing arm support and an energy conversion system, the base is connected with a draught fan floating platform, and the swing arm support is connected with the draught fan floating platform; the energy conversion system is connected with the hydraulic rod through a pipeline and used for converting hydraulic energy into electric energy. The outer swinging body is a hemispherical shell and can capture multi-dimensional acting force of waves; the inner swing body comprises a linear motor, a rotating shaft and a reversing rod, and the energy conversion system is driven to generate power through reciprocating motion of the linear motor. The problems that an existing wave energy device is low in energy conversion efficiency and unstable are solved, and through cooperative movement of the outer swing body and the inner swing body, capturing of multi-dimensional wave force and a flexible hydraulic system structure, the conversion efficiency of wave energy is improved, anchoring and structural layout is optimized, and the utilization efficiency of a sea area is improved.

The invention discloses a ship second-order wave force numerical forecasting method in a maneuvering state, and the method comprises the following steps: S01, reading calculation parameters including ship body grids, navigational speed and frequency, extracting ship body waterline information based on discrete grids, and calculating object plane normal vector n and m items; s02, solving a flow velocity potential by using a high-order analysis moving pulsation source method; s03, calculating a hydrodynamic coefficient, a wave exciting force and a motion response; and S04, forecasting the second-order wave force of the ship in the maneuvering state. By means of the method, reasonable, efficient and practical numerical forecasting can be provided for longitudinal, transverse and yawing second-order force (moment) caused by waves in maneuvering states such as forward / oblique navigation of the ship.

The invention provides a short-peak wave dynamic response analysis method and system based on a finite volume method, and the method comprises the steps: building a short-peak wave model based on the wind wave characteristic parameters under different sea conditions and the motion state parameters of a ship, and carrying out the calculation under ground coordinates to obtain a first wave surface equation; a first wave surface equation located in a ground coordinate system is converted into a ship body stable coordinate system through a coordinate and frequency conversion method, a second wave surface equation suitable for the surrounding environment of the ship is obtained, then a fluctuation pressure model caused by sea waves is established, the fluctuation pressure model is corrected through a Smith correction term method, and the ship body stable coordinate system is obtained. A multi-wave superposition fluctuation pressure model is obtained through a harmonic superposition analysis method; finally, the generalized disturbing force is constructed based on a finite volume method, the dynamic response of the ship in stormy waves can be predicted more accurately, modeling and simulation can be effectively conducted on the wave force borne by a complex ship body, and the calculation precision is effectively improved.

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 present invention relates to a hydrodynamic analysis method for a baffle-rockfill breakwater, comprising the following steps: developing a new structural type of a baffle-rockfill breakwater, that is, dumping rockfill on the back-wave side of the baffle, and fixing the two sides of the rockfill structure with fence plates; for the new baffle-rockfill breakwater structure, establishing a hydrodynamic analysis mathematical model of the baffle-rockfill breakwater based on potential flow theory, porous medium theory, and separation of variables method; using a matching characteristic function method, establishing a linear equation group based on the boundary conditions of fluid motion; and determining the undetermined coefficients in the velocity potential by solving the equation group. The baffle-rockfill breakwater proposed in the present invention is an environmentally friendly structure with the advantages of low transmission, small wave force, and prevention of scouring of the bottom of the dike. The theoretical analytical hydrodynamic analysis method of the baffle-rockfill breakwater provided by the present invention has an efficient calculation speed and can provide a scientific basis for the engineering design and optimization of the baffle-rockfill breakwater.

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 invention provides an offshore photovoltaic steel pipe and truss combined pile which comprises a steel pipe of an upper pile section and a truss of a lower pile section, the truss can sink into seabed soil, and the transverse sectional area of the truss is larger than that of the steel pipe; a connecting section is connected between the bottom of the steel pipe and the top of the truss, the connecting section is provided with a closed section extending into the truss at the lower end of the steel pipe, the truss is provided with an extending section at the top end of a vertical rod of the truss, and lap joint parts which are connected and matched with each other are arranged between the closed section and the extending section. The steel pipes and the trusses are combined to form the combined pile, and the combined pile is of a steel pipe structure above the lowest water level (including the low tide level and the wave trough), so that wave force and ice pressure can be reduced; meanwhile, the truss structure below the lowest water level can further improve the bending resistance and horizontal bearing resistance of the pile foundation, and under the same material consumption, the bending resistance of the truss structure is improved by several times compared with a pile of a solid web structure.

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 introduces a wave energy conversion system that utilizes the kinetic energy of water body waves, transforming it into usable energy. The system is innovatively designed with two buoyant bodies that, through their multi-dimensional non-parallel arrangement, form a recess optimized for capturing wave energy from. One of the system's distinctive features is its capacity to passively modify the relative orientation of the buoyant bodies, to become more parallel, in response to large wave forces, which serves to maintain stability under varying sea conditions. Concurrently, the system boasts advancements in the realm of installation and maintenance, presenting a streamlined approach that significantly alleviates the challenges traditionally associated with deploying and upkeeping marine energy converters. These aspects together underscore the system's novel contributions to enhancing the operational efficiency and sustainability of wave energy conversion technology.

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 present application provides an internal solitary wave force measurement device, system and method. The measurement device is used to measure the internal solitary wave force exerted on an underwater target arranged in an experimental water pool, and includes a support structure and a measurement unit. The support structure is used to support the measurement unit. The measurement unit includes a first measurement unit, a second measurement unit and a force transmission unit. The first measurement unit is used to measure the vertical force exerted on the center of mass of the underwater target by the internal solitary wave, and is used to transmit the horizontal force exerted on the center of mass of the underwater target by the internal solitary wave, wherein the positive direction of the horizontal force is the propagation direction of the internal solitary wave. The force transmission unit is virtually connected to the first measurement unit and fixedly connected to the second measurement unit, and is used to amplify and transmit the horizontal force to the second measurement unit. The second measurement unit is used to measure the amplified horizontal force. The technical solution of the present application can accurately measure the vertical force and horizontal force of the internal solitary wave.

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 provides a design method of a straight hole type wave absorbing structure for an ecological revetment, and belongs to the technical field of ecological channel wave absorbing. The technical problems that in the prior art, bank slope vegetation is eroded by ship waves for a long time, riverway water quality is damaged, and the process of designing a wave absorbing structure is tedious are solved. According to the technical scheme, the method comprises the steps that S1, ship traveling wave elements are calculated; s2, calculating a transmission coefficient and a reflection coefficient; s3, calculating wave force; s4, determining a structure design environment, and establishing a relation; s5, carrying out stability checking calculation; s6, selecting vegetation; and S7, determining the overall design of the wave absorbing structure. The method has the beneficial effects that the building structure of the vertical wall body with the straight holes is arranged in front of the ecological revetment, the holes are formed in the wave absorbing structure, and the ship traveling wave elements are treated; the problems that bank slope vegetation is eroded, water circulation in front of and behind the wave absorbing structure is poor, and design is tedious are solved through the technical means that the size of the straight hole type wave absorbing structure is calculated through a theoretical formula.

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.

The invention relates to the technical field of mooring ships, in particular to an LNG mooring ship wave load calculation method which comprises the steps that ship parameters and wave parameters of a target ship are obtained; calculating an estimated transverse force and an estimated longitudinal force of the target ship according to the wave parameters, the ship parameters and a preset wave force comprehensive coefficient; the maximum mooring force, the wind load and the water flow load borne by the target ship are calculated; calculating the transverse wave force and the longitudinal wave force of the target ship according to the maximum mooring force, the wind load and the water flow load; the estimated transverse force and the estimated longitudinal force are compared with the transverse wave force and the longitudinal wave force respectively, if the difference value between the two is larger than or equal to a preset threshold value, the wave force comprehensive coefficient is adjusted and recalculated, and otherwise, the wave load of the target ship is calculated according to the current wave force comprehensive coefficient; according to the method, the precision of wave load calculation can be effectively improved, and the method is suitable for wave load analysis of different types of LNG ships in the mooring state.

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 depth-adjustable internal solitary wave force measurement system and measurement method, the measurement system includes an experimental pool, a wave-making mechanism, a wave-breaking mechanism, an underwater target and a measurement device, the measurement device includes a first measurement part, a second measurement part, a force transmission part and a support structure; the first measurement part includes an upper connecting rod, a first dynamometer, a first lower connecting rod and a second lower connecting rod, the lower end of the second lower connecting rod is fixedly connected to the underwater target at its center of mass and the distance from the lower end of the second lower connecting rod to the upper end of the upper connecting rod is adjustable; the second measurement part includes a front connecting rod, a second dynamometer and a rear connecting rod; the force transmission part includes a connecting part and a virtual connection part, wherein the virtual connection part has a virtual connection channel that runs through in the vertical direction, and one of the upper connecting rod, the first lower connecting rod and the second lower connecting rod passes through the virtual connection channel and is virtually connected with the virtual connection part. The measurement device provided by the present application can accurately measure the internal solitary wave force exerted on the underwater target at different depths.

The invention belongs to the field of offshore wind power, and discloses an anti-typhoon combined type fan system which comprises a foundation assembly, a tower drum arranged on the foundation assembly and a fan arranged on the tower drum, and the foundation assembly comprises a central ballast water tank and a plurality of corner ballast water tanks annularly distributed around the central ballast water tank. The central ballast water tank is connected with the corner ballast water tanks through trusses, the central ballast water tank is of a hollow structure, the tower drum is inserted into the central ballast water tank in a penetrating mode, a gap is formed between the tower drum and the central ballast water tank, the tower drum can move up and down and rotate horizontally relative to the central ballast water tank, and a tower drum ballast water tank is arranged on the tower drum. The ballast water tank is installed, the internal draft can be changed every time and every second, foundation deviation caused by wind speed and wave force is compensated, the draft depth and weight of the platform are increased when stormy waves are large, and good stability is kept.

The present invention provides a single pile foundation wave energy power generation device and a cluster power generation system, wherein the single pile foundation wave energy power generation device comprises a support system, a power generation system, a mass adjustment system and an analysis control system; the support system is a single pile foundation, fixedly connected to the seabed to support the power generation system and the mass adjustment system; the power generation system is used to drive its power generation by gravity potential wave energy, and comprises a power generation float, and the power generation float is used to perform heave and sink motion in the support system by gravity potential wave energy; the analysis control system is used to control the mass adjustment system according to the change of the outstanding period of waves in the sea area to adjust the natural period of the power generation float to maximize the heave displacement amplitude of the power generation float. The present invention has a simple structure, wide applicability, high power generation efficiency, small wave force, high safety, high reliability, simple maintenance and low cost, and is very suitable for wave energy power generation in medium and shallow waters.