272 results about "Wave loading" patented technology

A floating foundation for wind turbines is disclosed, where the foundation essentially comprises at least three submerged buoyancy bodies connected to the lower end of the tower of the wind turbine at a common node member situated well above the surface of the sea. The buoyancy bodies are connected to the node member by means of relatively thin leg sections, whereby wave load on the foundation is reduced. By applying the foundation according to the present invention, stress concentrations and torques in the node member are reduced, whereby it becomes possible to apply a relatively lightweight and hence cheap node member. The overall weight of the construction is thereby reduced and hence the volume of the buoyancy bodies necessary to counteract the overall weight of the construction.

The invention discloses a drop weight type dynamic and static combined load impact experimental device which is characterized by comprising a body (1) and a sample bearing table (2), wherein the sample bearing table (2) is positioned on the body (1); a sample is arranged on the sample bearing table (2) and is connected with a hydraulic static load pressure mechanism which applies static pressure; an impact mechanism which can move up and down along a guide post (7) is arranged on the upper part of the body (1) and is connected with a lifting mechanism arranged on the lower part of the body. According to the experimental device disclosed by the invention, the coal and rock sample can be dynamically and controllably loaded in different dynamic and static combined forms, and multiple stress wave loading modes of coal and rock materials are simulated, so that the experimental result has the high practical engineering significance. The drop weight type dynamic and static combined load impact experimental device is simple in structure, convenient to operate and good in controllability. According to power failure tightening states of a brake driving motor and an electric hook, the impact mechanism is prevented from falling to injure people during unexpected power failures, so that the effective safety protection is realized.

The invention relates to a self-propelled ship model test device suitable for any wave direction and a use method thereof, belonging to the technical field of wave load testing of ships and marine engineering. The invention solves the technical problem that accurate test data cannot be obtained in the self-propelled ship model test in any wave direction at present. The present invention includes track I, track II, track III, a universal base and an elastic device. The universal base is arranged at the bottom end of track III, two tracks of track III are arranged in parallel, two tracks of track II are arranged in parallel, track I and track II Vertical and in the same plane, track III is perpendicular to the plane where track I and track II are located, track III is connected to track I through a sliding device, both ends of track I are connected to two tracks II through sliding devices, and the two ends of track I are connected. The sides are respectively provided with elastic devices, one end of the elastic device is connected with the end of the track I, and the other end is connected with the track II. The invention is used for self-propelled ship model test.

The invention provides a torsion calibration device for a measurement beam used for a ship model wave load test. The torsion calibration device for the measurement beam used for the ship model wave load test comprises a measurement beam. A beam surface of a measurement profile of the measurement beam is provided with a foil gage. One end of the measurement beam is fixed on a support, and the other end of the measurement beam is fixedly connected with a rod piece. The rod piece is vertical to the axis of the measurement beam. A tray is hung on one end of the rod piece through steel wire ropes, and weights can be placed on the tray. The distance between one end of the rod piece and a hanging end is equal to the distance between the other end of the rod piece and the hanging end. The torsion calibration device for the measurement beam used for the ship model wave load test provides a torsion calibration method for a measurement beam used for a ship model wave load test. According to the torsion calibration method for the measurement beam used for the ship model wave load test, by independently conducting gradation loading and weight unloading on two ends of the rod piece, the strain of each measurement profile is collected, fitting coefficients of the weight acting force and the strain are obtained, and a coefficient factor of the strain of each measurement profile of the measurement beam and a torsion in the wave load which is actually suffered by each measurement profile of the ship model is counted. The coefficient factor between the strain of each measurement profile of the measurement beam and a torsion in the sea load which is actually suffered by each measurement profile of the ship model can be demarcated through the torsion calibration device and the method for the measurement beam used for the ship model wave load test.

The invention provides an improved particle swarm algorithm-based optimized configuration method of a distributed electrical connection power distribution system. The optimized configuration method comprises the following steps: 1, inputting optimized configuration calculation parameter data, initializing particles and the flying speed of a particle swarm and a connected distributed power factor; 2, selecting an optimized configured type, selecting an entrance according to distributed power optimized configuration scheme types, namely addressing tolerance, sizing location optimization and location optimization and tolerance with a specified access number N; 3, selecting an optimization configuration goal and recording power distribution system parameters and distributed power system parameters, wherein the parameters includ system grid loss and average voltage level parameters; 4, performing optimized configuration calculation, performing fundamental wave load flow calculation and harmonic load flow calculation under each particle to obtain the system node voltage, the system fundamental wave loss and the harmonic loss under the particle, and then calculating a system node deviation index and a system total loss index; and 5, checking and outputting the result of the optimized configuration calculation.

Belongings to the technical field of rock dynamics, the invention relates to a pendulum load intermediate strain rate split Hopkinson pressure bar test device and a method. According to the invention, the hammerhead impact speed can be controlled by adjusting the pivot angle of a pendulum, thus realizing same dynamic stress wave loading under an intermediate strain rate loading condition. The device comprises a pendulum bracket that is provided with a pendulum; a calibration support is arranged on one side of the pendulum bracket, an incident bar and a transmission bar are disposed on the calibration support, and the incident bar, the transmission bar and the hammerhead axis are on one straight line; the incident bar and the transmission bar are provided with strain foils, which are in connection with the input end of an oscillographic recorder through pre-signal amplifiers, and the output end of the oscillographic recorder is connected to a computer. The method includes: adjusting the height and position of the calibration support, and ensuring alignment of the incident bar, the transmission bar and the pendulum hammerhead centere; making a sample clamped between the incident bar and the transmission bar; adjusting the pendulum pivot angle according to a required hammerhead impact speed; and releasing the pendulum to conduct an impact test, and recording and storing test data.

The invention belongs to the technical field of ship model wave load test and relates to a device and a method for bending moment calibration of a measurement beam for ship model wave load test. The device for bending moment calibration of the measurement beam for ship model wave load test comprises the measurement beam, strain gauges are arranged on the beam surface at positions of measurement profiles of the measurement beam, one end of the measurement beam is fixed on the support, a tray is hung at the other end of the measurement beam via a steel wire rope, and weights can be placed on the tray. The method for bending moment calibration of the measurement beam for ship model wave load test includes: by the aid of a mode of stepwise loading and then stepwise unloading of the weights, collecting strain of each measurement profile, computing fitting coefficient of acting force of the weights and the strain, and computing coefficient of relationship between the strain of each measurement profile of the measurement beam and bending moment in actually born wave load of each measurement profile of a ship model by the aid of the fitting coefficient and space between each measurement profile and the hanging end. The device and the method are capable of calibrating the coefficient of relationship between the strain of each measurement profile of the measurement beam and the bending moment in the actually born wave load of each measurement profile of the ship model.

The invention relates to a design method for simplifying fatigue for a semi-submersible type platform structure, comprising the following steps: (1) a semi-submersible type platform wave loading long-term forecast is carried out; (2) semi-submersible type platform structure stress long-term Weibull distribution shape parameter is determined; (3) the return-period maximum permissible stress range curve of the semi-submersible type platform structure life period is determined; (4) the return-period hotspot stress range of the semi-submersible type platform structure life period is calculated; (5) the fatigue life of the semi-submersible type platform structure is estimated. Compared with the existing fatigue design method of the platform structure, the design method for simplifying fatigue for semi-submersible type platform structure provided by the invention has the advantages of small workload and accurate calculation result, and can be used in the structure fatigue design of the semi-submersible type platform in the South China Sea.

The invention discloses a deep-sea SPAR floating-type draught fan fatigue damage analysis method taking a vortex-induced effect into account. The method includes the following steps of (1) analyzing avortex-induced movement phenomenon of a SPAR-type floating-type draught fan, and obtaining the overall force characteristics, movement trails and response frequency of the SPAR-type floating-type draught fan; (2) on the basis of FAST software, under a working sea condition and a survival sea condition, analyzing a movement response time interval of the SPAR-type floating-type draught fan and theforce condition of tied cables under the combined action of a wind load, a wave load and a current load; (3) according to a Miner linear fatigue damage superposition theory, S-N curves and a rain-flowcounting method, compiling an MATLAB program, conducting fatigue damage analysis under the action of a vortex-induced load and wave load of the draught fan separately, and correspondingly obtaining the total fatigue damage of the tied cables within the design life to provide an effective settlement strategy for accurately evaluating power response of the floating-type draught fan and the fatiguedamage of the tied cables.

The invention discloses a rigidity-adjustable type ship model sea load vertical bending moment measuring device comprising a round steel pipe. A left solid steel lever and a right solid steel lever are connected to the round tube in the radial direction of the round steel pipe in a rigid mode, wherein the two solid steel levers are symmetrical. The solid steel levers are provided with an upper steel sliding block and a lower sliding block in a penetrating mode, wherein the upper steel sliding block and the lower sliding block are symmetrical and can slide vertically along the solid steel levers. The left end of the round steel pipe and the right end of the round steel pipe are each in rigid connection with a flange plate. Two one-way strain gauges adhere to the upper surface and the lower surface of the round steel pipe in the length direction and are connected in a half-bridge bridge circuit mode. The rigidity-adjustable type ship model sea load vertical bending moment measuring device is suitable for ship model sea load tests with the inertia moment of the cross section changing within a certain range, accurate simulation of the inertia moment of the cross section of a ship model can be achieved, the inertia moments of all sections of a multi-section ship model can be different, the accuracy of a vertical wave bending moment test is improved, and the reliability of model test data is improved.

The invention provides a test sample gas sealing device for a gas-enriched coal rock gas solid coupling state impact test so as to research the impact mechanical property of a gas-enriched gas coal rock. The device comprises a support, a gas sealing storehouse, a sealing storehouse cover, a transmission rod connecting end, an incident rod connecting end, a transmission rod, an incident rod, an O-shaped sealing ring, a YX-shaped sealing ring, an incident rod connecting end and storehouse cover fixing bolt, a transmission rod connecting end and sealing storehouse fixing bolt, a gas inlet hole, a gas outlet hole, an electromagnetic adjusting control valve, a gas inlet adjusting gas valve, a gas tank, a gas outlet gas valve, a gas suction pump, a high-frequency gas gas-pressure sensor, a super-dynamic gas pressure acquisition instrument, a gas pressure monitoring instrument, a computer, a balance adjusting bolt and a fixing bolt. By adoption of the device, the gas content of a test sample is constant in the impact stress wave loading process in the gas-enriched gas coal rock impact test process. A unique test device is provided for research on the mechanical property of the gas coal rock.

The invention discloses a floating structure connected by a tension connector with adjustable length. Floating body cells are connected by the tension connector with adjustable length, and elastic buffer material is installed among the floating body cells; a pull force is borne by the tension connector; a pressure is borne by the elastic buffer material and the floating body cells; and a shear force is borne by an inclined tension connector which forms an angle with a connection surface. Both a rigid joint and a hinge joint of the combined floating structure have certain elasticity and can bear a large wave load. Because the length of the tension connector can be adjusted and the requirement on the manufacturing precision of the floating body cells is low, bigger floating body cells can be used so that a bigger floating structure can be combined. Because of being not welded together with the floating body cells, the tension connector can be changed so that the service life of the floating structure is not limited by the fatigue life of the connector.

The invention relates to a small waterplane double-hull wave load test model design and test method. Models which are consistent with the weight distribution, geometric similarity and motion similarity of all sections of a real ship are manufactured, the models are subjected to segmentation processing, a measuring beam frame is arranged, and through load collection and analysis calculation of strain gauges on the measuring beam frame, ship motion state parameters and main loads borne by the ship body are accurately obtained. The method can be used for measuring data of six-degree-of-freedom motion and acceleration of a small waterplane catamaran model in waves and for measuring seven key wave load values such as vertical wave bending moment and shearing force, vertical shearing force of amiddle longitudinal section, transverse opposite opening force and transverse wave bending moment, horizontal torque and overall asynchronous pitching torque. The method has very important significance in mastering wave load characteristics of the type of ship and determining reasonable structural design loads.

The invention belongs to the technical field of water surface aircrafts, and relates to a water surface aircraft wave-collision load all-machine non-power model water pool test system and method. A wing fixing device (2) limits the rolling angle of a model, a gravity center fixing device (3) and a tail wing fixing device (12) limit the pitching angle of the model, and a trailer side bridge (8) limits the height of the model from the water surface. Before the model test, the height of the model from the water surface and the initial longitudinal inclination angle are adjusted and recorded. During test, a trailer pulls to enable the model to run to the required speed, the speed of the trailer, the height of the model from the water surface, the overload and the pressure value are collected and recorded, and the collected data information is analyzed, so that the wave-collision load data of the whole-machine non-power model of a water surface aircraft with fixed attitude when dragged on the wave surface can be accurately tested, and the collision wave load during the near-water surface flying can be accurately forecasted. The strength and the structural design of the water surface aircraft can be better verified. The method is practical and feasible, and is simple to operate, reliable in test result and wide in application range.

A tension-based tension leg platform (TBTLP) for use in ultra deepwater applications to support dry-tree oil and gas production utilizes a tension base or artificial seabed that simplifies tendon design at deepwater locations in harsh environment and has a truss pontoon structure that reduces vertical and horizontal wave loadings. The platform may include a riser support tower that makes production risers feasible in 8,000 ft water depths without riser pretension to the hull and reduces or eliminates vortex induced vibration problems.

The invention discloses a slope model experimental method and system for researching an exploitation and blasting dynamic instability mechanism from an open pit to underground. The method comprises the following steps of manufacturing of an experimental model; loading of the experimental model, wherein an initial stress condition and different blasting vibration simulating loads of an experimentaltest block are loaded; model experiment testing. The system comprises a model manufacturing system, a model loading system and a structural plane shearing resistance strength test system, the model manufacturing system comprises an upper-lower side rock surrounding mold, a similar upper-side rock surrounding material, a similar lower-side rock surrounding material and an experimental model frame;the model loading system comprises an experimental test block initial stress state applying device and a blasting vibration simulating load applying device, and the structural plane shearing resistance strength test system comprises a stress control type shearing device, a lifting jack and a dial indicator. The slope model experimental method and system for the researching exploitation and blasting dynamic instability mechanism from the open pit to underground have the advantages that the aim of repeatable operability for simulating blasting vibration wave loading is achieved, and the attenuation law of the shearing resistance strength of the slope rock body structural plane under repeated blasting vibration effects can be objectively and visually reflected.

The invention discloses wave-overtopping type wave power generation buoy which is applied to the field of ocean energy exploitation and ocean monitoring. Through the wave-overtopping type wave power generation buoy, wave is introduced into a water storage cavity in a device by an oblique wave introducing surface, a turbine generator unit at the bottom of the water storage cavity is driven to generate power continuously and efficiently by using difference between an inner water head and an outer water head of the water storage cavity, thereby enabling various power devices of the buoy to work; meanwhile, the wave introducing surface also has breakwater function and is capable of ensuring that the buoy is not damaged under the extreme wave load. The wave-overtopping type wave power generation buoy has the beneficial effects that the wave is introduced into the water storage cavity by using the oblique wave introducing surface, the unstable wave energy is converted into stable potential energy, and the turbine generator unit is driven to generate power continuously and efficiently; the damage of the wave load to the buoy can be effectively reduced, and the resistance to severe environment of the buoy is improved; meanwhile, the interior of the wave introducing surface of the buoy is a cavity structure and is used for storing water or air; and the buoy is towed, sunk, floated and recycled by means of gravity and buoyancy.

The invention discloses a safety factor calculation method for seabed slope stability. The safety factor calculation method comprises the steps of acquiring and calculating wave characteristic parameters and seabed soil mass strength parameters of a sea area; establishing a numerical model based on the wave power characteristics and the soil body strength parameters; analyzing the wave field dynamic model and the seabed slope numerical model based on numerical wave generation and a finite element strength reduction method to obtain a slope stability safety coefficient; and acquiring stabilitychange analysis and estimation under a certain slope rate based on different relative positions of waves and slopes. The stability coefficient of the underwater side slope under the wave load can be estimated, and convenience is provided for selection of the construction slope rate of the underwater temporary side slope. The optimized design slope rate is obtained on the basis of different designparameters and calculation working conditions by utilizing the convenience of numerical simulation calculation. When certain safety requirements are met, the earth excavation and backfill amount of the whole foundation trench is reduced, and damage to the seabed natural ecological environment is reduced to a certain extent.

The invention relates to the field of offshore wind power generation, in particular to a novel energy drawing-shock absorbing deep sea wind power generating floating type semi-submersible platform. The novel energy drawing-shock absorbing deep sea wind power generating floating type semi-submersible platform comprises a draught fan blade, a draught fan, a tower barrel and a semi-submersible platform body; the semi-submersible platform body comprises three floating barrels and a triangular floating box; and a wave energy drawing-shock absorbing system is installed in the floating barrels and comprises a power generator, an inertia container, a return spring and a plurality of bearing springs. According to the semi-submersible platform, according to the sea condition or the actual requirement, by adjusting the load power of the power generator and the hydraulic oil flowing speed of the inertia container, influences on normal running of an upper draught fan by the vertical swinging, transverse rocking and longitudinal rocking freedom degree wave frequency response caused by wave loads and the problems of fatigue damage and the like are inhibited, and meanwhile, wave energy is converted into electric energy; and the energy drawing-shock absorbing system serves as a passive control system and fully utilizes the platform stand column space, the shock absorbing performance of the system is reliable, meanwhile, wind power generating and wave energy power generating are integrated, and the whole system has good economical efficiency.

The invention relates to an ocean platform wave removal icebreaking structure. The ocean platform wave removal icebreaking structure is characterized by comprising an upper cone ring, a middle cone ring and a lower cone ring, wherein the upper cone ring, the middle cone ring and the lower cone ring are sleeved on a pile leg of an ocean platform in sequence from top to bottom, the upper cone ring and the lower cone ring are respectively fixed with the pile leg in a welding mode, the inside of the middle cone ring is fixed with the pile leg in the welding mode through a plurality of supporting beams which are arranged in a spaced mode, the top of the middle cone ring is fixedly connected with the bottom of the upper cone body through a plurality of upper inclined angle prismatic bodies which are arranged in a spaced mode along the circumferential direction, the bottom of the middle cone ring is fixedly connected with the top of the lower cone ring through a plurality of lower inclined angle prismatic bodies which are arranged at intervals along the circumferential direction, an edge angle of each upper inclined angle prismatic body and an edge angle of each lower inclined angle prismatic body are both outside arranged, and the upper inclined angle prismatic bodies and the lower inclined angle prismatic bodies are symmetrical to the middle cone ring. The ocean platform wave removal icebreaking structure is low in manufacture and installation difficulty, can be widely applied in the process of ocean platform icebreaking, is particularly applicable to ocean platform structures which are large in diameters of pile legs, and are greatly influenced by wave load.

The invention belongs to the design technology of marine oil and gas equipment, and in particular relates to a fatigue design method of a deepwater riser. This method considers the coupling effect of vortex-induced motion of the floating platform and vortex-induced vibration of the riser when calculating the fatigue damage of the deep-water riser. The influence of fatigue damage caused by vortex-induced motion of the floating platform on the fatigue damage of the riser caused by the current is considered, and the influence of the fatigue damage caused by the extreme wave load on the fatigue damage of the riser is considered. The present invention is more in line with the actual fatigue damage accumulation essence of the deep water riser, more in line with the known Miner's linear damage accumulation criterion, more in line with the current environmental load change trend and characteristics, more scientific and reasonable, and the design result is safer and more reliable.

The invention discloses a pile-soil simulating device and method under a wave load. The device comprises a wave simulator, a plurality of pipes, and a model pile. The pipes are sequentially and axially connected to form a cylindrical pipe. The bottom of the cylindrical pipe is arranged on a base platform. The top of the cylindrical pipe is provided with a top cover. The model pipe is arranged in the cylindrical pipe. Fillers are filled between the model pipe and the internal wall of the cylindrical pipe. The wave simulator is connected to the top cover. The provided pile-soil simulating device can precisely simulate the mechanical characteristics of sea. By directly applying a simulated wave load on the water pressure of pores, accurate data can be obtained. Furthermore, the structure of the whole device is simple; the operation is convenient; the device can work for a long time, and can simulate many conditions of seabed and wave; the experiment material can be repeatedly used, the pollution is little, and the cost of single experiment is low.

The invention relates to an architectural structural system, in particular to the structural system used for an ocean platform. A swing wall structural system comprises a main body piece, a connecting piece and a swing wall body. The bottom end of the main body piece is fixedly arranged on a ground base, the connecting piece is connected with a lateral surface of the main body piece and a lateral surface of the swing wall body respectively in a hinged mode, and the bottom end of the swing wall body is connected with the ground base in a hinged mode. The swing wall structure is capable of increasing the ability of a tube and frame type ocean platform structure to entirely resist an external load, greatly increasing abilities to resist the ice loading, the wave loading, the wind loading and the earthquake load, even the tsunami (lessons of the tsunami caused by a big earthquake in Japan in 2011 are painful and the ocean platform structure cannot be destroyed because of the destruction of a regional rod piece.

The invention discloses a full-submersible separation type fan foundation and relates to the technical field of offshore wind power generation. Through the full-submersible separation type fan foundation, influence on a buoy by wave load is directly avoided, and the whole power response of a fan is obviously lowered. The full-submersible separation type fan foundation mainly comprises two parts including a submerging and surfacing type foundation and a fan system. The submerging and surfacing type foundation is composed of a sleeve, a supporting frame, submerging and surfacing drums, tensioning wires and catenaries; the fan system is composed of a fan and a tower drum; the tower drum penetrates through a middle sleeve, capable of realizing floating up and down; the sleeve is fixedly connected with a submerging and surfacing box through the supporting frame; the sleeve, the supporting frame and the submerging and surfacing drums are fixed beneath the ocean surface to form the submerging and surfacing type foundation, serving as a directed supporting seat of the tower drum, through the tensioning wires and the catenaries; and the bottom of the tower drum is connected with a seabed through the tensioning wires. The full-submersible separation type fan foundation is in a completely-new offshore fan foundation structure form and is suitable for building an offshore fan foundation.