122 results about "Wave simulation" patented technology

The invention provides an active reflection compensation type single-board wave making device which comprises a computer control and drive system, a mechanical system and a wave measurement and feedback system which are sequentially connected. By adopting an active reflection compensation wave making technology, waves meeting the requirement of test precision are made, and meanwhile, waves reflected from a ship model, an opposite pool wall and a wave absorber can be effectively eliminated; and more than 80 percent of reflection waves are absorbed, thus the condition that the reflection waves strike a wave making mechanism to generate reflection waves once again is avoided so as to effectively improve the wave simulation quality of a pool or a water tank. A servo motor is used as a drive device, and a stepper motor control card and an encoder counting card are adopted to carry out two-position control, thereby the frequency response and the wave making control precision are improved, the drive mechanism is simplified and the maintenance cost is greatly reduced.

The invention relates to a human body terahertz wave simulation rehabilitation physiotherapy apparatus for conditioning sub-health, wherein the physiotherapy apparatus comprises a signal source generator, a modulator, a terahertz wave generator, a terahertz wave loudspeaker antenna and a controller; the signal source generator is used for generating a signal source of low--frequency terahertz wave signals; the modulator, by controlling an electric frequency, is used for modulating the amplitude of the low-frequency terahertz wave signals of the signal source in various modes including pulse and sine, and the modulator is used for inputting the modulated terahertz electromagnetic wave signals into the terahertz wave generator; the terahertz wave generator is used for receiving the modulated low-frequency terahertz electromagnetic wave signals, conducting amplification and frequency multiplication on the low-frequency terahertz electromagnetic wave signals by virtue of a frequency extended link so as to generate a specific terahertz wave frequency band and for transmitting the specific terahertz wave frequency band to the terahertz wave loudspeaker antenna which is in charge of radiating the frequency band; and the controller is used for processing and controlling complete machine signals. With the implementation of the physiotherapy apparatus, various diseases, in particular cardiac diseases, can be conditioned by virtue of abundant human body terahertz electromagnetic wave sources.

Embodiments of the present invention provide a novel method and discretization for animating water waves. The approaches disclosed combine the flexibility of a numerical approach to wave simulation with the stability and visual detail provided by a spectrum-based approach to provide Eulerian methods for simulating large-scale oceans with highly detailed wave features. A graphics processing unit stores a one-dimensional texture referred to as a wave profile buffer that stores pre-computed results at a number of discrete sample points for performing wave height evaluation. The water surface is rendered according to water height values computed using the wave profile, accounting for advection, spatial diffusion, angular diffusion, boundary reflections, and dissipation.

The invention discloses a low-altitude wind shear three-dimensional backscattering wave simulation method for an airborne meteorological radar. The low-altitude wind shear three-dimensional backscattering wave simulation method comprises the following steps: establishing a three-dimensional meshed computational domain by utilizing scene parameters including a scene range and boundary conditions; performing fluid simulation on the computational domain to generate original wind field data; correcting the original wind field data; establishing an simulation scene and reading the corrected wind field data according to settings of the scene parameters; according to the simulation scene, simulating low-altitude wind shear of the airborne meteorological radar, and performing coherence stack on scattering points within a radar beam to form a radar backscattering wave signal of a scanning direction; respectively updating airplane position information, corrected wind field data and radar beam angle scanning information by utilizing the airborne parameters, the scene parameters and the scanning parameters; judging whether the scanning is completed or not according to a scanning range of the radar parameters. The method can be used for truly reflecting meteorological characteristics of the wind shear three-dimensional backscattering wave signal, so that the simulation data is effective and reliable.

The invention aims to provide a gate type internal solitary wave maker. The gate type internal solitary wave maker comprises a gate plate, a voltage stabilizing direct current power supply, a support and an elastic material. The support comprises an upper beam, vertical slide ways and limiting beams. The upper beam is fixed between the upper end portions of the two vertical slide ways, the limiting beams are arranged are arranged on the front side and the rear side of the two vertical slide ways, the gate plate is arranged between the two vertical slide ways, and the two end portions of the elastic material are fixed to the gate plate and the upper beam respectively. The elastic material is stretched out when the gate plate moves downward so that the gate plate can produce upward rebounding force, electromagnets are arranged on the gate plate and one of the limiting beams respectively, and the voltage stabilizing direct current power supply is connected with the electromagnet on the gate plate and the electromagnet on one of the limiting beams through a switch. The gate type internal solitary wave maker is simple in structure, convenient to operate, small in size and low in energy consumption, can well meet the requirements of small tests for ocean internal solitary wave simulation, is particularly suitable for small-scale double-layer gutter channels, and has good application value and good market value.

The invention, which belongs to the technical field of physical simulation of laboratory waves, provides a wave simulation method and device for a pool wave maker and a wave making device. On the basis of a full-domain method of combination of a virtual wave domain and a physical wave domain, a completely non-linear moving boundary differential equation between two domains is established and is processed by numerical discrete treatment and a wave-making signal is obtained directly. Different from the traditional linear analytical solution method, the provided method considers the nonlinearityof the wave completely and does not require calculation of the complex hydrodynamic transfer function in the frequency domain, so that the simulation accuracy and efficiency are improved effectively,the uncoordinated phenomenon of the wave plate motion is reduced, and the stability and effectiveness of wave physics simulation are enhanced. Moreover, the method having high universality and versatility can be adapt to the conventional single-sided linear wave-making machine, L-type wave-making machine, rectangular wave-making machine, circular wave-making machine, or other more complicated planar arbitrary-form wave-making machine systems.

The invention relates to a non-interference terahertz wave simulation physiotherapy instrument for lung cancer. The physiotherapy instrument comprises a processing end and a wave transmitting terminalconnected with the processing end; the processing end comprises a signal source generator, a modulation module and a main control module; the wave transmitting terminal comprises a housing and a horn-shaped suction cup disposed at the front side of the housing, the front end in the housing is provided with a fixing frame, the middle is provided with an installation frame, and the installation frame divides the housing into a terminal installation cavity at the front side and a heat dissipation cavity at the rear side; a terahertz wave generator is arranged in the terminal installation cavity;a wave source transmitting end at the front side of the terahertz wave generator is fixed to the fixing frame, the front side of the fixing frame is provided with a waveguide window, and the waveguide window is provided with a wave focusing lens covering the waveguide window; one side wall of the terminal installation cavity is provided with a through hole connected with a wire of the processingend; the heat dissipation cavity is provided with a heat dissipation structure, the heat dissipation structure comprises a heat conductor laid transversely and a heat dissipater disposed at the rear side of the heat conductor, and the heat conductor is provided with a connecting part connected with the non-interference terahertz wave generator. The physiotherapy instrument realizes detection and treatment integration and has a good physiotherapy effect on lung cancer.

The invention discloses a finite element method for precisely simulating transmission line waving through an ANSYS software. According to the finite element method, beam elements with a bending freedom degree under condensed local coordinates are adopted to simulate sub-wires of a transmission line assisted with the characteristic that stress mentoring guarantee cables only have tension; meanwhile, multiple connection modes of the sub-wires and spacers are considered, three-component aerodynamic parameters of all the sub-wires under a full-blast attack angle are precisely acquired through an icing split gas aerodynamic characteristics wind tunnel test, and then an APDL is compiled to directly load aerodynamic loads relevant to motion states; and last, precise waving simulation is realizedthrough nonlinear iteration solving. Through the finite element method, an icing multi-split transmission line waving phenomenon can be precisely reproduced, the application range is wide, and complicated anti-waving measures can be taken based on the simulation method.

The invention discloses a method for achieving large-range dynamic wave efficient real-time rendering on a stream processor. According to the method, a novel grid model based on the LOD (Level of Detail) technology is involved, dynamic wave simulation is achieved based on a Gerstner model, a concave and convex texture mapping method accelerates remoter wave rendering, and animation concave and convex textures are utilized for improving the wave rendering effect. The method is characterized in that the reflecting effect on the sky and the sun is achieved through the cube textures, a Phong illumination model is applied to achieve wave illumination and achieve Fresnel reflection, the animation textures are adopted for simulating foam in waves, and the special effects such as shadows, projected onto the sea surface, of clouds are achieved. The method can carry out real-time interactive rendering on waves within the hundred-kilometer-level range on a computer platform with the stream processor, and has the advantages that the speed is high, the simulation degree is high, and platform compatibility is good.

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 discloses a hypersonic velocity blunt front edge streaming turbulent kinetic energy inlet boundary setting method, which comprises the following steps of S1, calculating a basic flow field, and obtaining a steady basic flow field variable; S2, performing direct disturbance wave simulation by using a numerical simulation system to obtain an unsteady flow field variable; S3, analyzing the flow field to obtain a disturbance field [phi]', and obtaining turbulent energy distribution characteristics; S4, setting a turbulent energy inlet boundary; and S5, calculating turbulence/transition and the like. According to the method, the turbulent energy equation in the turbulence model does not need to be modified, the calculation deviation of the turbulent energy equation at the shock wave downstream can be avoided by setting the inlet boundary condition, the more accurate turbulent energy inlet boundary condition is set based on a direct numerical simulation result, and the method has the advantages of reasonable calculation result, high realizability and high reliability, and can be popularized to three-dimensional flow conditions and the like.

The invention relates to a multi-axis control system and method for wave simulation. The multi-axis control system for wave simulation comprises a host computer and at least one multi-axis manager. Each multi-axis manager comprises controllers connected by a CAN bus. The host computer issues motion instructions through Ethernet. The host computer is connected to multi-axis controllers through I/O ports. The multi-axis controllers transmit the motion instructions to the corresponding controllers through the CAN buses so that corresponding motions are carried out. The motion instructions are transmitted to the multi-axis managers through Ethernet, and the CAN bus-based multi-axis managers control wave generation units to complete corresponding motions on the basis of the motion instructions. In this way, the real-time performance, accuracy and reliability of wave simulation control can be ensured.

The invention discloses a staggered grid finite difference method for wave field simulation, which is suitable for wave field simulation of wave equations in any medium. The invention aims at the unstable phenomenon caused by the solution of the difference coefficient in the high-order staggered grid finite difference method, and provides an algorithm based on the Vandermonde matrix to solve the difference coefficient, which effectively overcomes this problem. The method can provide accurate and stable wave field simulation results; the technical solution is easy to implement and has wide applicability.

The present invention discloses a full waveform inversion method and system aiming at a target layer. The method comprises the steps of carrying out the inversion based on the land seismic data comprising all offsets to establish an initial speed model based on the full wave field inversion; preferring the offsets, and carrying out the characteristic wave simulation corresponding to the target layer based on the preferred offset and the initial speed model; carrying out the update iteration on the initial speed model aiming at the residual of an actual characteristic wave of the target layer and based on a simulated characteristic wave and the preferred offset to establish a full waveform inversion model aiming at the target layer. According to the present invention, the full offset inversion results are used as an initial model, and the full waveform inversion is carried out again by utilizing the middle-long offset information, so that the inversion results are improved greatly.

The invention provides a wave field simulation method and device for various seismic sources based on a moment tensor. The wave field simulation method comprises the steps of constructing a staggereddifference scheme of a three-dimensional elastic wave equation by using a moment tensor elastic wave equation forward modeling method; inputting a velocity model of a target area into the staggered difference scheme of the three-dimensional elastic wave equation, and obtaining a three-dimensional elastic wave field simulation difference equation of the target area; and loading a target seismic source into the three-dimensional elastic wave field simulation difference equation of the target area by using a seismic source theory of the moment tensor, and performing field wave simulation of the seismic data. Wave field simulation of different media and different seismic sources is realized by using each embodiment in the invention, and the seismic data processing accuracy is improved.

The invention discloses a device for calibrating a wave height and a wave period of a wave buoy. The device comprises a wave simulating device, a motor, a braking device, a controller device and a terminal control device, wherein the wave simulating device comprises buoy carrying platforms, a swing mechanism, a north half ring shaft, a double-ring truss mechanism and a south half ring shaft. The device can be used for vividly simulating movement tracks of the wave buoy on a sea surface, and ensures that the wave buoy can swing on the basis of a translational motion, with regulated swing angle, when rotating along with the calibrating device, so that the sine characteristic movements of waves are accurately simulated, and the wave height and the wave period of the wave buoy are accurately measured and calibrated; and after the wave buoy is clamped once, the wave buoy can be transferred to a next detection point without being detached. The device is capable of calibrating the wave buoy within a wave height range of 2m to 10m and a wave period range of 3.7s to 60s. The rotating direction of the device is changeable, so that the device can be used for correspondingly simulating two opposite wave directions.

The invention relates to a PSH wave simulation method applied to helicopter ditching, and belongs to the technical field of the helicopter simulation experiment. The method comprises the following steps: giving waveform of classical wave according to wave shape, wherein the waveform comprises forward wave and standing wave; solving parameters of various particles in a choppy water area, wherein the parameters comprise speed, acceleration and pressure intensity. Through the SPH wave simulation method applied to helicopter ditching disclosed by the invention, the movement and kinetic parameter of various particles in the wave shape can be directly computed according to hydrodynamics rule; the time-consumed previous wave generation computation is unnecessary, the effect of pushing plate for wave-making can be achieved, and the time consumed for computation can be greatly reduced.

The invention relates to a noise wave simulation data generating method based on environmental information. The noise wave simulation data generating method based on environmental information is characterized in that environmental information around a radar and noise wave features are collected, related and mapped, wherein the environmental information comprises weather information, ocean information and geographic information. The environment information is divided into reseaus according to the longitude and the latitude and the sizes of the reseaus are set according to resolution cells of the radar. Environmental information parameters or noise wave feature parameters which influence a noise wave model are recorded in each reseau; according to the environmental information parameters or the noise wave feature parameters stored in each reseau, modeling is performed on sea noise waves and noise wave data are generated; according to the coordinates of the longitude and the latitude of the radar and the coordinates of the longitude and the latitude of all reseau centers, the noise wave data are converted into noise wave data under polar coordinates of the radar and the resampling technology is used for generating radar noise wave echo data which are expressed with the polar coordinates.

The invention relates to a wind wave joint action offshore wind power generation set vibration performance test system which is characterized by comprising a wave water source supply control system, a wave vortex forming control system, a wave motion forming control system, a sea wind simulation control system, a test model system, a test space system and a test testing system. The wave water source supply control system, the wave motion forming control system and the sea wind simulation control system which are connected with an inner casing are arranged between the inner casing and an outer casing of the test space system. The wave vortex forming control system, the test model system and the test testing system are arranged in the inner casing. A motor control technology can be utilized to achieve rotating wave simulation. Electric hydraulic control is utilized to achieve all-dimensional wave motion to form force simulation and advancing direction controllability. An electric control technology is utilized to achieve sea wind speed and direction simulation. Water supply automatic control is achieved. The test system is reasonable in structure, reliable in performance and high in working efficiency.

The invention discloses a water tank active absorption type wave maker system and a control method, the system comprises a head end active absorption type wave maker, a tail end active absorption type wave maker, a reflectivity measuring device, a central servo controller and a computer, the head end and the tail end of a water tank are respectively provided with an active absorption type wave maker; and wave height sensors are arranged on the wave making plates at the two ends respectively and used for feeding back wave height data on the plates in real time, and a central servo controller is adopted to control servo motors at the two ends at the same time to drive the wave making plates to operate. According to the scheme, all operation data and feedback data are synchronously acquired and calculated, and high-precision wave simulation is carried out while high-performance wave absorption is realized. Meanwhile, by adopting the control method provided by the invention, high-efficiency reflected wave absorption can be realized, a wider wave spectrum range can be adapted, and the experimental use requirements of high simulation precision and large wave height in a short water tank are met.

The invention discloses a method for generating failure travelling wave simulation signals and belongs to the technical field of power transmission detection. The method comprises the following steps: receiving and analyzing a waveform data downloading command and downloading waveform data into corresponding memory units by a main control unit, and respectively reading the waveform data from the memory units and outputting the data of the memory units to a digital-to-analog conversion unit through an auxiliary control unit; providing a playback address for the memory units and providing a playback clock for the digital-to-analog conversion unit through the auxiliary control unit; converting the quantity of the waveform data output by the memory units to an analog quantity by the digital-to-analog conversion unit; converting the analog quantity output by the digital-to-analog conversion unit to high-frequency current and outputting the high-frequency current by a current modular unit; inputting clock pulses into the main control unit by a global positioning system module. The method can solve the problems that true and effective failure travelling wave signals are difficult to obtain, the output travelling wave signals easily distort, and travelling wave signal sources are difficult to be synchronously triggered during double-terminal location.

The present invention discloses a high-frequency surface acoustic wave device acoustic-electric coordination full-wave simulation method. The method comprises: firstly, constructing a high-frequency surface acoustic wave device acoustic-electric coordination full-wave simulation system, wherein the constructed system comprises an HFSS modeling simulation module and an Ansoft Designer circuit coordination simulation module; then performing physical modeling and simulation on a radio-frequency effect of an encapsulated portion of a surface acoustic wave surface-mounted device; and finally, enabling the Ansoft Designer circuit coordination simulation module to construct a radio-frequency equivalent circuit by using an Ansoft Designer and acquire a circuit coordination simulation result. The method disclosed by the present invention has high modeling efficiency and a simple implementation process, can effectively solve the problem of failing to precisely simulate the surface acoustic wave surface-mounted device under a high-frequency operating condition, and has an excellent promoting function for research and development of high-frequency surface acoustic wave devices.

A method for generating circularly polarized vortex electromagnetic waves comprises the following steps: (1) setting parameters; (2) calculating the spatial phase delay distribution from a feed sourceto the surface of a reflective array; (3) calculating the desired phase distribution of the surface of the reflective array so that an antenna can radiate vortex electromagnetic waves along the direction as defined in the description; (4) calculating the rotation angle distribution of a reflective array element; (5) according to the rotation angle of the reflective array element, establishing a full-wave simulation model of the surface of the reflective array; and (6) performing numerical value calculation on the full-wave simulation model of the reflective array and calculating to obtain full-wave simulation results of an amplitude pattern and a phase pattern of the reflective array. The invention effectively solves the problems of complex structure, large processing difficulty and lowconversion efficiency of the existing circularly polarized vortex electromagnetic wave generating device, can be used as a transmitting antenna or a receiving antenna of a circularly polarized OAM communication system, and can improve communication capacity.

The invention relates to the field of wave simulation, in particular to a wave maker movement control method and system. According to the control method, made forward wave shapes and target wave shapes are compared, so that the forward wave shapes are regulated; finally, forward waves or inclined waves meeting user requirements are obtained. The wave making mode is simple; the wave making speed is high; the control precision is high; a corresponding control system uses a host computer and a controller for controlling a wave making unit; the cost performance is high; distribution wires are saved; the control structure is optimized; the energy consumption is reduced; the communication is faster and more stable; the control precision is higher; the requirements of synchronism and real-time performance of a wave making control system are met.

The invention relates to a three-dimensional ocean wave simulation optimization method for dynamic positioning ship offshore operation. Firstly, the terrain blocks are triangulated to form triangularmeshes to construct sea level. Then, considering the main action and influence factors of ocean waves-wind, current and so on, the height map is generated based on Fast Fourier Transform (FFT), and then the height field is calculated and simulated to generate ocean waves. Then the GPU and CPU are used to speed up the parallel computing. Finally, the Vega Prime visual development platform is used to simulate and show the wave simulation results. The optimized simulation method can model and render ocean waves scientifically, realistically and realistically, realizes real-time 3D ocean wave scene simulation, and increases the real-time and interaction of ocean waves to a certain extent.

The invention belongs to the technical field of sea wave simulation, and particularly relates to an insertion type breaking wave simulation device. The insertion type breaking wave simulation device comprises a driving motor, a transmission assembly, a water bucket, an adjusting screw rod and a supporting bracket, wherein the supporting bracket is fixedly arranged above a wave-making water tank, the water bucket is arranged in the wave-making water tank in a parallel direction relative to the supporting bracket and movably connected below the supporting bracket through the adjusting screw rod,the driving motor is fixed on the supporting bracket and connected with the water bucket through the transmission assembly, so that the water bucket is driven to go up and down in the wave-making water tank to further simulate insertion type braking wave generated by the vertical action of the wave in a descending process. The insertion type breaking wave simulation device employs an integral structure. The structure is simple, the stability is good, the cost is low, the installation and operation are convenient, and the available range is wide. The volume of the extracted water amount is increased by the dustpan-type water bucket, and the height range of the produced wave is also increased. The requirements of simulating breaking waves with different intensities and different wave heights in natural marine conditions in a laboratory can be met.

The invention relates to a dynamic and static multifunctional test servo loading system, and belongs to the technical field of civil engineering. The system includes a steel reaction force platform, areaction force wall, a rigid cross type load beam and a dynamic actuator. The reaction force wall includes a first reaction force wall 1 and a second reaction force wall 2 at an angle of 90 DEG. Thedynamic actuator includes a plurality of horizontal dynamic actuators and a plurality of vertical dynamic actuators. The horizontal dynamic actuators are respectively connected with the reaction forcewall and the rigid cross type load beam. The vertical dynamic actuators are respectively connected with the steel reaction force platform and the rigid cross type load beam. The system component of the system can be freely disassembled to form a test servo loading system with different functions, and can realize free switching of static multi-dimensional loading, dynamic multi-dimensional loading, vertical high-speed impact loading and ocean wave simulation loading systems through disassembly and connection and the control actuators. The system can greatly save investment of manpower and material resources, and is a multifunctional test servo loading system which is reasonable in design, and is efficient and convenient, and can be dismounted freely.

The invention discloses a wave generation device suitable for a wave simulation test and an operation method thereof and relates to the field of wave simulation generation and model testing. The wavegeneration device applicable to a wave simulation test mainly comprises a test water tank, a power and transmission system, a wave generation system, a ratchet mechanism and a bank slope simulation system. The power and transmission system generates and outputs kinetic energy required by operation of the whole device, the wave generation system generates waves with different motion properties andforms, the ratchet mechanism can control the kinetic energy transmission process of the whole device and protect the motor, and the bank slope simulation system is used for simulating dam slopes and bank slopes with different gradients. The wave generation device is simple in structure, has less external energy consumption, can generate waves with different wave elements and slopes with differentinclination angles according to test working conditions, and is conductive to deep exploration of the processes of wave propagation, deformation, climbing, crushing and the like.