11 results about "Irregular waves" patented technology

1. Name of the product in this design: Half skirt (ruffled trim, layered hazy gauze, irregular wave-like hem 26ssBBL708). 2. Intended use of this design: for wearing. 3. The key design features of this product are the combination of shape and pattern. 4. The image or photograph that best illustrates the design's key features: the front view. 5. Since the information is already clearly expressed in the submitted views, other views are omitted. 6. Other situations requiring explanation: The clothing models are only for better product display and do not require protection.

The application provides a flow field reconstruction and deduction method based on K-A theorem, and belongs to the technical field of ship hydrodynamics. First, multi-dimensional data such as the direction, amplitude, period, frequency and flow velocity of irregular waves are collected and integrated into high-dimensional wave vectors. Then, the KAN network with B-spline curve as a learnable function is used to map the high-dimensional input into a low-dimensional parameter list, obtain the amplitude, angular frequency and initial phase of the dominant equivalent regular wave, calculate the decoupling target function by constructing an equivalent wave superposition model, compare the decoupling target function with the true value to obtain a loss function, and then optimize the network parameters by backward propagation until convergence. Finally, based on the network output parameters, a wave superposition model is constructed to represent the real wave in the form of a series of interpretable regular waves superimposed in time sequence, so that efficient and accurate flow field reconstruction and deduction are realized.

The present application belongs to the field of ship hydrodynamics and motion prediction, and in particular to a device and method for predicting the hydrodynamics and motion of a ship coupled with ice, which first derives a Green function that satisfies the boundary conditions of the ice layer and the free surface, as well as all other conditions except the surface condition of the ship, and through the Green function, the differential equation of the velocity potential is converted into a boundary integral equation on the surface of the ship only, which introduces an extended surface at the waterline of the ship body to eliminate the influence of irregular wave frequencies; an asymptotic solution formula of the Green function is analytically derived, thereby establishing an approximate and effective solution program for the coupled interaction of the ship / wave / ice layer, and numerically calculating the results of the added mass, damping coefficient and wave exciting force of the ship body; through the method, the interaction mechanism of the water wave / ship / ice layer under different parameter characteristics can be deeply understood, and theoretical support is provided for the hydrodynamic problems, motion prediction and rational design of polar ships.

The application provides an irregular wave slamming construction platform stress analysis method and system and a computer readable storage medium thereof. According to platform basic dimensions and wave basic parameters, a stress condition of the irregular wave slamming construction platform is directly, quickly and efficiently calculated based on a large amount of test measurement data. The defects of the direct calculation complexity, measurement cost and the like of the slamming pressure load prediction in the existing theoretical calculation and model test are solved.

The present application relates to the technical field of sea wave height prediction, and discloses a multiscale physical enhancement type irregular sea wave prediction method, comprising the following steps: (1) collecting marine wave historical data, preprocessing the data, and dividing the data into a training set, a verification set and a test set; (2) decomposing the wave data into three components of high, medium and low frequencies through wavelet decomposition; (3) constructing a WaveFormer model; (4) training the WaveFormer model; and (5) inputting the test set into the trained WaveFormer model to obtain a wave height prediction value. The present application decomposes the original wave sequence into three components of high, medium and low frequencies through two-layer stationary wavelet transformation, explicitly allows the model to capture the multiscale characteristics of irregular waves, ensures the rationality of wave prediction, realizes sequence-level prediction on the premise of ensuring prediction accuracy, improves the prediction efficiency, and constructs a data-driven item based on the wave prediction result, so that the model prediction accuracy is further improved.

The invention discloses a method for calculating a wave flow force shielding coefficient of a sea-crossing bridge pile group foundation, and belongs to the technical field of pile group foundation wave flow force research. The method comprises the following steps: making a bridge pier, a bearing platform and a pile group foundation in a scaling-down manner, simulating an application scene and installing in a test wave pool; irregular waves are generated in the test wave pool through a wave maker, and the wave height and period of the waves in the test model are simulated; the water depth, the wave height, the wave period, the pile diameter and the pile distance in the test wave pool and the wave flow force borne by the pile foundation are measured respectively; and a wave flow force shielding coefficient calculation formula is provided based on analysis of the on-way change rule of the pile foundation wave flow force shielding coefficient. Compared with a calculation method in the current specification, the calculation method provided by the invention provides convenience for single pile stress re-checking calculation in the pile group, the calculation precision is improved, the cost increase caused by too conservative engineering design calculation is avoided, and the engineering construction cost is effectively saved.

This invention provides a method for predicting linear wave loads in ship structural design, relating to the field of ship engineering structural design technology. Based on optimized Latin hypercube sampling and three-dimensional potential flow calculation, this invention constructs a dataset of hydrodynamic pressure fields and load components under regular wave conditions. It extracts the basis function system and establishes a linear mapping relationship between the combination coefficients and the loads. For irregular wave sea states, it interpolates to determine the state transition matrix and control matrix. Combined with the main wave disturbance force, it performs a time-series recursion of the combination coefficients, triggering local transient calculations at preset intervals, and performing sparse verification corrections on the recursive state. Finally, it outputs the load history in real time through the mapping relationship and statistically analyzes the extreme values ​​to generate a wave load design parameter table. This method replaces full-order solutions with low-dimensional recursion, triggering a small number of full-order verifications at preset intervals. While maintaining prediction accuracy comparable to full-order solutions, it significantly reduces computation time, providing efficient and reliable load input for ship structural design.

The application discloses a method for evaluating ship riding wave probability in irregular waves based on AIS data, which comprises the following steps: 1, establishing a probability density function of ship density based on ship AIS data; 2, selecting a representative route and multiple test points at equal intervals, and obtaining the probability of occurrence of a specific random sea state in a target sea area according to a wave scatter diagram of a sea area near the test points; 3, calculating the riding wave probability of a ship in random waves; 4, calculating the riding wave probability of a ship in a specific irregular wave of a test point of the representative route in random waves; 5, calculating the riding wave probability of the ship under each random sea state of the test point, and calculating the riding wave probability of the ship of other test points according to the same steps. The application solves the related problem of solving the riding wave motion of a ship in irregular waves, can predict the probability of the riding wave motion of the ship in irregular waves, the calculation result can directly obtain the riding wave motion probability of the ship in irregular waves, the solving precision is high, the efficiency is high, and the application is suitable for various ship types.

The application discloses a ball-shaped non-contact friction nanogenerator for efficiently collecting low-frequency wave energy, and relates to the field of wave energy collection.The ball-shaped non-contact friction nanogenerator is composed of a stator and a rotor, and the stator and the rotor correspond to the outer shell and the inner shell of a concentric ball respectively.A copper electrode on the inner surface of the outer shell and a polytetrafluoroethylene (PTFE) film on the outer surface of the inner shell form a non-contact TENG, which converts mechanical energy into electrical energy.The widely-distributed, low-frequency and irregular-peak wave energy can be collected to supply power to small electronic devices.The provided non-contact TENG is low in cost, simple in structure and stable in performance, and provides a feasible scheme for collecting / using irregular wave energy, and has important practical significance.

The invention discloses a self-adaptive hydrodynamic load calculation method for a large-diameter single pile. The self-adaptive hydrodynamic load calculation method comprises the following steps: determining geometrical parameters of a large-diameter single pile foundation and establishing a coordinate system; determining a water depth and irregular wave surface time sequence; the discrete amplitude, circular frequency and wavelength of the irregular waves are obtained; distinguishing a low-frequency band and a high-frequency band according to the relationship between the wavelength and the single pile diameter; the wave load of the low-frequency band on the large-diameter single pile at the current moment is calculated; the wave load of the high-frequency band on the large-diameter single pile at the current moment is calculated; 5, the total wave load on the large-diameter single pile at the current moment is obtained through integration, the simulation process is started from the moment 0 to the preset moment T, and if the simulation time does not reach the preset moment T, the fifth step is executed again until the moment T is reached. According to the calculation method, the hydrodynamic load calculation of the large-diameter single-pile foundation is more accurate.

The invention discloses a method for determining a wind energy utilization coefficient of a semi-submersible fan, which relates to the technical field of marine sciences, and is characterized by comprising the following steps of: (1) determining an actual wind speed at an infinitesimal point of a fan impeller according to a blade element plane and a flow velocity triangle of the infinitesimal point; (2) determining an inflow angle; (3) correcting an axial induction factor a and a radial induction factor b; (4) according to the six-degree-of-freedom motion relation of the floating platform, the factors of the wave load of the irregular waves for generating the substantial influence on the wind speed are surging, heaving and pitching, and then the wind speed is determined; (5) determining an effective tip speed ratio under the wind wave load coupling influence; and (6) the influence factors of the wind energy utilization coefficient (Cp) are decomposed into the tip speed ratio and the pitch angle, and therefore a correction formula of the Cp is obtained.