60 results about "Regular wave" patented technology

The invention discloses a rocking plate type regular wave and an irregular wave maker. The irregular wave maker comprises a wave making plate, wherein the wave making plate is of a swinging structure, the bottom of the wave making plate is hinged with the bottom of the water tank and the top is connected with a connection rod, the connection position of the rotation rod and the turnplate is adjustably connected with the turnplate, the swing of the wave making plate is controlled by the connection position of the connection rod on the turnplate, the turnplate is connected with the motor for driving the turnplate, and the motor is connected with a variable-frequency governor for adjusting the frequency of the motor. The irregular wave maker has the advantages of being capable of generating regular and irregular wave, simple structure, convenient operation, and being applicable to various water tanks for generating wave.

Vehicle pneumatic tire includes a carcass having sidewalls and a tread rubber. A sidewall area is covered on an outside by a sidewall rubber strip. A moiré pattern is arranged on the sidewall rubber strip and is formed by a superimposition of at least two linear non-identical families of curves. A first family of curves of the at least two linear non-identical families of curves is formed by undulatory curves having regular wave form. A second family of curves of the at least two linear non-identical families of curves is formed by undulatory curves having irregular wave form. This abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.

The invention provides a three-dimensional numerical simulation method for ship large-scale rolling motion, which comprises the following steps of reading a grid file to carry out ship hydrostatic calculation; calculating an influence coefficient matrix of boundary integral equation for Taylor expansion boundary element method; solving velocity potential of laminated modes and its spatial first and second derivatives and mj terms; carrying out the green's function in time domain and its spatial derivative solution; calculating a roll damping coefficient; carrying out the irregular wave decomposition, linear superposition into incident wave time calendar; carrying out the direct time-domain disturbance wave force calculation by taylor expansion boundary element method; calculating incidentwave force and hydrostatic recovery force; modeling a large-scale motion forecasting equation; using the fourth-order runge-kutta method to solve the motion equation step by step to evaluate the nonlinear motion of the ship in the top wave or oblique wave; and carrying out the numerical simulation and characteristic statistics of ship large amplitude motion in irregular waves. The method of the invention can predict the large amplitude motion of a container ship in regular waves and irregular waves, and can be used for numerical simulation and characteristic statistics of the large amplitude motion of a ship in irregular waves.

The invention discloses a machine vision-based ship hull six-degree-of-freedom measurement method. The method includes the following steps that: a RGB three-color marker is posted on a target ship, when the hull of the ship moves, the marker moves with the hull of the ship, two cameras are mounted at different positions, and the angles of the cameras are adjusted, so that the shooting range of the cameras can cover the movement range of the marker, and the cameras carry out image acquisition; images acquired by the cameras are preprocessed, and a RGB color occupancy volume-based segmentation algorithm is adopted to perform image segmentation operation, so that boundary parameters can be obtained, qualified feature points are made to be contained in a boundary range; and a binocular three-dimensional reconstruction method is adopted to obtain the three-dimensional coordinate values of the feature points; and the six degrees of freedom of the hull of the ship are decomposed, and the three-dimensional coordinates of P (x, y, z) at any one time point and the coordinates P'(x', y',z') of a next time point are known, so that a translation vector T(delta x, delta y, delta z) and a rotation vector R (alpha, beta, gamma) which are corresponding to the movement of the hull of the ship are obtained. With the machine vision-based ship hull six-degree-of-freedom measurement method of the invention adopted, real-time and non-contact measurement of six-degree-of-freedom movement of the hull of the ship in regular waves and irregular waves can be realized, and accuracy satisfies engineering requirements.

The invention discloses a system for measuring ship draft and river water level based on special micro wave amplitude and a water gauge, belonging to the measurement field of the ship draft and the river water level and solving the technical problem that a measurement field video image comprising high-precision ship draft or river water level data can be displayed in real time by just using one miniature video picture. In the system, a technology of displaying the average height of irregular wave surfaces, a special micro technology of wave amplitude and ship water gauge maker or river water gauge, a video image monitoring system technology, an automatic tracking and shooting target technology of miniature camera equipment and the like are mainly adopted. The system has the advantages that visual, real, objective, just, clear and high-precision measurement data and measuring field live action which can be put on records is provided in real time by the video image and can be transmitted outside. The system has low cost, is simple and practical, is convenient to operate, carry and maintain and is energy-saving and environmentally-friendly, and the automatic measurement of the ship draft and the water levels of the river and the like is easily achieved.

The invention discloses a movable sand-adding and wave-making muddy water model test device with an automatic sand-removing function and a method. The movable sand-adding and wave-making muddy water model test device comprises a test water tank system, a wave-making system, a sand-adding and sand-removing system, a monitoring system and a control system. The wave-making system adopts the arrangement that a movable type wave-making machine is combined with a fixed type wave-making machine, and a vertical type energy dissipation box is combined with a slope type energy dissipation net, and simulation of a three-way regular wave and a multiway irregular wave can be achieved; the sand-adding and sand-removing system can achieve sand adding in a multi-section and movable mode, and can achieve the automatic sand-removing function; and the monitoring system and the control system can achieve closed-loop control of the device, so that the device achieves a simulation test where sand adding is synchronously matched with the waves according to a given sand-adding spatial and temporal process curve. According to the movable sand-adding and wave-making muddy water model test device with the automatic sand-removing function and the method, multi-direction and multi-waveform waves can be generated, further the stability of test sand-adding can be guaranteed, the functions of automatic, movable type and multi-direction wave-making and sand-adding are achieved, test water-sediment can be circularly utilized, the automatic sand-removing function is achieved, and the test cost is effectively reduced.

The invention discloses an unmanned aerial vehicle remote sensing-based wave and floating body movement forecasting system, and belongs to the technical field of ships and marine engineering. A shipborne unmanned aerial vehicle is used to obtain a ship's periphery distant wave flow field, and the information on the picture is analyzed and inversely deduced to obtain wave elevation information; thewave elevation information obtained by the unmanned aerial vehicle is processed, and an irregular wave surface is decomposed into superposition of a plurality of regular waves; the moments of all monochromatic waves reaching the ship are calculated according to wave propagation models, the proportion of the monochromatic waves, reaching the ship at every moment, in total monochromatic waves is calculated, and forecasting is carried out if the proportion is higher than a preset threshold; and all monochromatic waves generate wave surfaces according to a predetermined wave model, the wave surfaces are the forecast wave surfaces, and the movement of a floating body is calculated through RAO, a pulse response function and other fast algorithms. The system provides long-period accurate wave field information and self movement forecasting information for offshore structures and engineering work, and improves the working efficiency.

The invention provides an active absorption type plate-pushing wave generation device based on moment feedback, and the device comprises an industrial personal computer, a controller, a servo motor, a moment sensor, an absorption filter, and a push plate, wherein the industrial personal computer is connected with the controller, and is used for transmitting a position signal of a wave generator. The controller is connected with the servo motor, and drives the servo motor to rotate according to the received signal. The servo motor drives the push plate to move through a mechanical structure. The moment sensor is located in the servo motor, and is used for collecting the output torque of the motor in real time. One end of the absorption filter is connected with the moment sensor, and receives the collected real-time torque, and the other end of the absorption filter is connected with the controller, and enables a motion signal after feedback correction to be transmitted to the controller. The device is high in precision of the wave generation technology, and the impact on the device from an environment is small. The feedback signal is convenient to obtain. The wave generation technology can generate a long-time stable regular wave and random wave sequence, and improves the accuracy of wave model tests.

The invention relates to a button polymer lithium ion battery and a circular waved edge pressing method thereof. The edge pressing method includes cold pressing or hot pressing. The cold pressing doesnot require heating, and other methods are the same as hot pressing. The hot pressing comprises the following steps of: S1, preparing molds: preparing a upper mold and a lower mold of which the sidesclose to each other are configured in waved shapes; S2, loading a heating mechanism: preparing heating elements and loading the heating elements on the upper mold and the lower mold; S3, die cutting:die cutting the button polymer lithium ion battery; and S4, hot pressing: putting the button polymer lithium ion battery die cut in the S3 in the lower mold having the heating mechanism described inthe S2. The method is reasonable in design, can press the circular sealing edge of the die cut button polymer lithium ion battery into waved shapes staggered up and down, can conveniently presses thesealing edge from a plane into a regular wave, and makes the battery appearance regular.

The invention discloses a slope breaking wave impact pressure calculation method. At present, slope breaking wave impact pressure calculation is an important link of slope-type seawall engineering design, and plunging breaking wave is a most serious and most dangerous breaking wave type; on the basis of simplified assumed conditions, a half-experience half-theory plunging breaking wave impact pressure calculation formula is put forward, existing regular wave flume experiment data and on-site observation data are utilized, the formula and some empirical formulas adopted currently at home and abroad are compared and analyzed, and the result shows that a former Soviet Union formula adopted currently in China in a standard manner is small in calculation result in a calculation condition with large wave height. The method is similar to calculation results of the Stanczak improved formula and has good wrapping performance on used verifying experiment data.

The invention provides a wave detection system including a data processor, a data collector, a wave-height gauge, and a flow velocity instrument, one end of the wave-height gauge leads out of the liquid surface and the other end of the wave-height gauge is immersed into the fluid, The flow velocity instrument is arranged in the fluid, the wave-height gauge and the flow velocity instrument are arranged on the same section, the data collector acquires the signals fed back by the wave-height gauge, and the flow velocity instrument and transmits the signals to the data processor. The system is high in precision, wide in application, and flexible in instrument arrangement, can obtain the time domain process curve of the incident wave and the reflection wave, is suitable for regular wave and irregular wave, and effectively improves the accuracy of a wave model test.

The invention provides a three-dimensional numerical method for predicting wave resistance increase of low-speed fat large ships under bad sea conditions. Read the mesh file and carry out the hydrostatic calculation of the ship; Calculating the influence coefficient matrix involved in the boundary integral equation; Velocity Potential of Laminated Modes and Its Spatial First and Second Derivativesand Mj Terms; Green s Function in Time Domain and Its Spatial Derivative Solution; Roll damping coefficient calculation; The Velocity Potential at the Center Point of the Discrete Mesh of the SteppedFree Surface in Time Domain with the Free Surface Condition of Integral Scheme; Direct Time-Domain Disturbance Wave Force Calculation by Taylor Expansion Boundary Element Method; Calculation of Incident Wave Force and Hydrostatic Recovery Force; Modeling, solving equations of motion; Calculation of wave resistance; According to the motion response RAO and drag-increasing RAO, the large amplitudemotion and wave drag-increasing spectrum in irregular waves are analyzed and calculated. The method of the invention can predict the large amplitude motion RAO of a container ship in regular waves, the wave resistance RAO, and the analysis results of the large amplitude motion of the ship and the wave resistance spectrum in irregular waves.

The invention discloses a reflection wave separation method of a nonlinear wave based on the principle of waveform superposition. Through using a single fixed wave height meter to measure an incident wave with enough duration and a synthesis wave with the superposition of the incident wave and a reflection wave, the principle of waveform linear superposition is applied, the excellent stability and repeatability of the incident wave created by a wave tank are considered, the synthesis wave is directly subtracted from the incident wave, a reflection waveform can be obtained, and thus the purpose of separating the reflection wave is achieved. According to the method, only the single fixed measurement instrument is needed, and the method is suitable for linear and arbitrary high-order nonlinear regular wave problems. The measurement method is simple, the solution process is easy, and the separation efficiency of the reflection wave is improved.

The invention discloses a helicopter rolling response forecasting method with flexible airbags under irregular waves, and belongs to the field of helicopter forced landing overwater floating and overturning. The method comprises: dividing finite element grids for a certain type of helicopter with a flexible air bag; importing the finite element grids into finite element calculation software to obtain a helicopter transverse static stability curve and helicopter rolling response curves under a calm water surface and two regular waves; obtaining a damping term in the rolling kinetic equation according to the damping formula considering the nonlinear term and the helicopter rolling response curve under the quiet water surface; through Matlab programming, obtaining wave surface equations underregular waves and irregular waves; and substituting the wave surface equation under the irregular wave and the helicopter transverse static stability curve into a rolling kinetic equation to obtain ahelicopter rolling response curve under the irregular wave. According to the method, the rolling response condition of the helicopter under the irregular waves can be forecasted only through simple programming and helicopter fluid-solid coupling simulation calculation under a plurality of simple water surface conditions.

The invention relates to an automatic massage brush for a cattle body. The automatic massage brush comprises a crawler belt device and strip-shaped brushing plates. The automatic massage brush is characterized in that the strip-shaped brushing plates are inserted into a groove of a crawler belt and arranged on the crawler belt; the crawler belt device is driven by a power transmission shaft and rotates at a constant velocity; and an infrared induction switch starts a motor and drives the crawler belt to work when the cattle body contacts brush hairs, and the regular wave-typed brush hairs of the strip-shaped brushing plates are attached on the cattle body for massaging and brushing. The automatic massage brush is large in contact area with the cattle body and is convenient to dismantle, clean and sterilize, and accords with the physiological structure of the cattle body.

The invention provides an antenna irregular wave port modeling and directional diagram solving method based on a moment method. The antenna irregular wave port modeling and directional diagram solving method comprises the following implementation steps: 1) performing grid division on an electromagnetic field plane of an antenna model wave port; 2) determining electromagnetic field modes satisfied by wave ports of different types of antennas; 3) determining an equation conforming to an antenna wave port; 4) acquiring an approximate difference format of an operator L in an equation which the antenna wave port conforms to; 5) solving an equation satisfied by an antenna wave port surface by adopting a moment method; 6) obtaining a solving result of the antenna wave port mode; and 7) solving an antenna radiation pattern. According to the method, the two-dimensional moment method for solving the wave port mode and the three-dimensional moment method for solving the antenna pattern are combined, the application range of the wave port model of the moment method is widened from a regular waveguide to an irregular waveguide, the problems that in the prior art, the wave port modeling capacity is insufficient, and the application range is limited are solved, and the method is used for solving practical engineering problems.

The invention relates to a composite door filling core plate manufacture technology and a filling core plate and particularly relates to a one-step molded V-shaped plate forming technology and a molded V-shaped plate. The forming technology comprises the steps of step one, collecting leftover materials produced during production of a composite door, putting the leftover materials in a pulverizer to be pulverized, exposing and drying the pulverized materials, sending the dried pulverized materials to a glue blender for glue blending, laying the pulverized materials after glue blending on a plate holding trolley on a conveying belt in a fixed thickness, and sending the pulverized materials into a cold press by the plate holding trolley to be pre-pressed into pulverized material slabs; step two, conveying the pulverized material slabs in the first step to molds with V-shaped grooves of the hot press through the conveying belt to be molded into V-shaped plates through hot pressing. One section of a plate body of the molded V-shaped plate is in a directly connected line shape, the other section is in a regular wave shape, and the regular wave shaped section is formed by integral connection of a plurality of identical V-shaped sections. By means of the forming technology and the molded V-shaped plate, the energy consumption is reduced, and production costs are reduced.

The invention belongs to the technical field of ocean engineering, and provides a deep ocean netting forced oscillation testing device considering the impact from flow velocity attenuation. The device comprises a fishing net frame module and a forced oscillation module. The fishing net frame module can be slidingly connected to a first vertical sliding module and a second vertical sliding module through a first connection module and a second connection module. The fishing net frame module is perpendicular to the first and second vertical sliding modules, and the first and second vertical sliding modules are respectively connected to the bottom of a trailer. A forced oscillation device is disposed on the trailer, and is connected with the fishing net frame module. The forced oscillation module drives the fishing net frame module to vibrate. The device carries out the sinusoidal oscillation or random oscillation through a forced netting module, so as to simulate the movement of water particles under the conditions of regular waves and irregular waves. The device employing the fishing ground netting module under the uniform flowing condition forces the front and rear nets to carry out oscillation at the same time, so as to simulate the flowing speed attenuation condition under the condition of a big KC number of waves.

The invention discloses a method for quickly forecasting vertical motion response of a ship, and the method comprises the following steps: obtaining a heaving motion differential equation and a pitching motion differential equation of the ship in regular waves, and measuring ship type parameters and navigation working condition parameters of the ship; according to the heaving motion differential equation, the pitching motion differential equation, the ship type parameters and the working condition parameters, obtaining a frequency response function of heaving motion at the gravity center of the ship and a frequency response function of pitching motion of the ship; and employing a frequency response function of heaving motion at any cross section of the ship and a frequency response function of vertical acceleration at any cross section of the ship for realizing the rapid prediction of vertical motion of the ship. According to the rapid forecasting method for the vertical movement of the ship, complex steps of geometric modeling of the ship body, hydrodynamic mesh generation, hydrodynamic calculation analysis and the like are avoided, and calculation time and computer memory resources are greatly saved. The invention relates to the technical field of ships.

The invention relates to an eye-imitating wave energy collector which comprises transmission assemblies, electromagnetic power generation assemblies, coil arrays, piezoelectric cantilever beam assemblies, a coil panel and side plates. The two side plates are symmetrically arranged relative to the coil panel; the transmission assemblies are installed on the outer sides of the side plates; the electromagnetic power generation assemblies are installed on the inner sides of the side plates; the front face and the rear face of the coil panel are each provided with two sets of coil arrays in an embedded mode; the coil arrays and the electromagnetic power generation assemblies are arranged correspondingly; the coil panel and the side plates are installed on a lower installation base through lug bases; an upper cover is installed on the lower installation base; the piezoelectric cantilever beam assemblies are installed at the lug bases of the coil panel; a waterproof sealing rubber strip is installed in a groove of the connecting face of the lower installation base and the upper cover; the transmission assemblies swing left and right under excitation of sea waves and drive the electromagnetic power generation assemblies to rotate; and the electromagnetic power generation assemblies and the coil arrays generate relative motion and then generate power through electromagnetic induction. Compared with the prior art, according to the eye-imitating wave energy collector provided by the invention, the wave energy in the marine environment can be effectively collected for power generation under the excitation of low-frequency irregular waves.

The invention relates to a light source containing an internal light distribution curve. The light source comprises a glass bulb with a reflective coating, a lamp cap, a stem and a luminophor, wherein the area of the reflective coating is less than the area of a transmission area, and the distance between the edge of the reflective coating and the center of the transmission area H is equal to 1/2 to 1/3R (the maximum radius of the glass bulb); the upper surface of the glass bulb is a regular wave arc surface, and the reflective coating and the upper surface of the glass bulb are matched in shape; and the luminophor is an ion luminous ball. The shape of the traditional glass bulb is changed, the internal light distribution curve is a double-wing flat curve, the angle is greater than 120 degrees, a huge lamp does not need to be matched, the reflection rate of the light source is increased to 98%, the luminous efficiency is greater than 92%, the luminous efficiency of the system is greater than 110 to 160 lumens watts, the illumination and light distribution is more uniform, the interference of glare is reduced, the light source meets the requirement of GB50034-2004 and the Ministry of Construction CJJ45-2006 ' city road lighting design standard' that the waterproof and dustproof grade achieves IP65 above, the life of the light source is prolonged, the intensity of the light source and the irradiation effect are improved, and the purposes of energy saving and environmental protection, low price and convenience in use are achieved.

The invention discloses a high-pressure wave water tank device. The high-pressure wave water tank device comprises two civil engineering foundations arranged in a bilateral symmetry mode, a wave generation water tank, a wave generation piston, an I-shaped beam, a hydraulic rod and a hydraulic pump; the wave generation water tank is in dynamic sealing connection with the wave generation piston andis used for generating high-pressure conditions in the wave generation water tank and increasing the wave generation height; the wave generation piston is composed of a rigid iron plate and can realize simulation of a wave shape through rubber flexible connection; the bottom of the hydraulic rod is connected with the wave generation piston to control regular movement of two sides and the middle part of the wave generation piston; and the hydraulic pump is connected with a hydraulic pipeline of the hydraulic rod to control the lifting motion of the hydraulic rod so as to control the wave generation piston to form different regular waves. The device is small in size and simple in structure, can increase the wave generation height and simulate large storm surge, and can be used for researching the problems of sediment movement, seabed instability and the like under the action of waves.

The invention provides a disordered incremental sparse point cloud reconstruction method for ship traveling wave numerical simulation, and relates to the field of ship and ocean engineering, and the method comprises the following steps: S1, obtaining ship traveling wave free surface data caused by a target ship body in a regular wave environment through a viscous flow CFD numerical simulation method; S2, performing three-dimensional modeling in a physical engine according to the ship traveling wave free surface data to obtain a ship traveling wave model; S3, obtaining a three-dimensional point cloud on the free surface of the ship traveling wave by adopting a stereoscopic vision disordered incremental sparse point cloud reconstruction algorithm; and S4, comparing the three-dimensional point cloud and the viscous flow CFD numerical simulation ship traveling wave free surface data, and verifying the accuracy of the ship traveling wave three-dimensional reconstruction result. A physical engine is used for building a stereoscopic vision simulation environment, and a disordered incremental sparse point cloud reconstruction method is used for obtaining three-dimensional coordinate points. Therefore, the accuracy of three-dimensional reconstruction of the free surface of the ship traveling wave is verified, and the observation of the ocean wave is finer.