13 results about "Wave pressure" patented technology

The invention relates to a double-pile foundation seabed dynamic response simulation method under the wave action based on a multi-physics field coupling model. According to the method, a Wave-Stratum-Seabed Interference (WSSI) model integrating wave-seabed-structure interaction is constructed, the interaction between waves and a double-pile foundation under different pile spacing ratios and incoming flow deflection angles is simulated on an OpenFOAM platform through a finite volume method (FVM), and then the dynamic response of a seabed is analyzed. The model comprises a wave sub-model and a seabed sub-model based on the Biot three-phase consolidation theory, and key parameters such as free surface rise, dynamic wave pressure, vertical pore water pressure, vertical effective normal stress and liquefaction depth can be accurately calculated. An effective simulation tool and method are provided for pile foundation design and safety evaluation in ocean engineering, optimization of the pile foundation layout is facilitated, and the stability of an ocean structure is improved.

The present application relates to the technical field of structural response simulation, in particular to a ship container wave pressure intensity simulation method and system, in the present application, based on Fourier transform, frequency value, direction angle, energy coefficient, pressure amplitude and phase quantity are composed into a unified frequency domain vector, and the surface element pressure history is reconstructed by time step by time, so that the wave load is uniformly distributed in the spectrum domain phase, the frequency component phase superposition and the speed and heading offset are synchronously transmitted to each time point, the surface element pressure history and the sea state spectrum parameters are one-to-one corresponding, through the penalty function method, the displacement difference value and the allowable gap limit value are read at the node layer, the penalty coefficient is selected according to the constraint type to generate the penalty quantity, and the penalty quantity is superimposed to the node pressure record with the time step, the supporting, limiting and allowable movement state is quantified as the penalty term and is updated with the iteration increment, the constraint strength is uniformly controlled by the penalty coefficient grade table, and the working condition switching can reuse the grid and material input by replacing the matrix and penalty coefficient library.

Disclosed in the present disclosure are a surface-acoustic-wave temperature and pressure sensing device and a manufacturing method thereof. The surface-acoustic-wave temperature and pressure sensing device includes a first high-temperature-resistant substrate and a second high-temperature-resistant substrate bonded together, where a recess is formed in the second high-temperature-resistant substrate to form a sealed cavity between the first high-temperature-resistant substrate and the second high-temperature-resistant substrate; first surface-acoustic-wave temperature sensors and surface-acoustic-wave pressure sensors are formed on a first surface of the first high-temperature-resistant substrate located in the cavity, and second surface-acoustic-wave temperature sensors are formed on a second surface of the first high-temperature-resistant substrate opposite the first surface; and the first surface-acoustic-wave temperature sensors, the second surface-acoustic-wave temperature sensors, and the surface-acoustic-wave pressure sensors are electrically connected to one another.

This invention discloses a method for calculating the impact pressure of an open cavity entering the water under wave conditions, relating to the field of marine engineering technology. It is used to predict the entry process of an open cavity into the water. The method includes constructing a geometric model of the open cavity, constructing a wave field, simulating the motion of the target cavity entering and within the wave field, constructing the time-domain motion equation of the target cavity, solving the time-domain motion equation of the target cavity using numerical integration, calculating the hydrostatic pressure component, the impact pressure component, the air wave pressure component, and the wave-induced pressure component of the target cavity, and decoupling the calculation of the impact pressure based on these four sub-components. This invention improves the accuracy of calculating the impact pressure distribution and time history characteristics of an open cylindrical cavity under wave conditions by establishing a coupled dynamic model of the wave field and the entry process of the open cavity through a multi-phase coupling mechanism.

The invention provides a pressure and acceleration sensor frequency characteristic calibration combined device, which is characterized in that a turntable adopts a single air channel structure, when a pressure sensor is mounted in a mounting interface of a pressure chamber bracket, the turntable is a set of pressure sensor frequency characteristic calibration device, and when a piston assembly is mounted, the turntable is a set of acceleration sensor frequency characteristic calibration device. The two pressure sources are trapezoidal wave pressure sources, and the pressure rise time in the pressure chamber is consistent with the time from opening to complete opening of an air inlet of the pressure chamber, so that the excitation frequency and the static acceleration value are known quantities, and related parameters of phase-frequency characteristics and amplitude-frequency characteristics can be obtained from response waves. The piston assembly can measure the sensitivity of the acceleration sensor and the influence value of boundary conditions such as carrier mass and rigid connection strength under the simulation real condition. When the rotating disc air channel has a blocking section, pulse waves and platform acceleration waves can be generated and used for measuring the frequency characteristic of the acceleration sensor under the pulse excitation condition and the variable quantity of overshoot along with the excitation frequency.

The application discloses a method for predicting the maximum depth of a cliff top crack of a sea cliff under extreme sea conditions, which comprises the following steps: obtaining the gravity of a cliff top structure; obtaining the height of the structure above the ground; obtaining the maximum wind speed; obtaining the wind force acting on the structure; obtaining the average water depth, wave height and wave duration in front of the sea cliff; obtaining the trough height, trough depth and sea cliff height of a sea erosion trough; calculating the average wave pressure of waves acting on the cliff face above the average water depth; calculating the seawater infiltration rate of the sea cliff soil; calculating the seawater infiltration distance of the sea cliff above and below the average water depth; obtaining the natural and saturated specific gravity of the cliff soil; obtaining the cohesion and internal friction angle of the cliff soil; calculating the seawater infiltration volume in the cliff; calculating the weight of the cliff after seawater intrusion; obtaining the cohesive friction strength of the cliff soil; obtaining the maximum crack depth provided by the cohesive friction strength and tensile strength; and calculating the maximum depth of the cliff top crack.

The application provides a method for testing and calculating wave pressure of an inclined dam surface under the action of a landslide surge, comprising the following steps: (1) according to the Froude similarity criterion, a large-scale three-dimensional physical model containing complex terrain, a river channel, an inclined dam body and a hydraulic gate is constructed in proportion; (2) the hydraulic control system is used to simulate the landslide body entering water under different working conditions to carry out the test; (3) the test data are processed to obtain the characteristics that the wave pressure above the water surface sharply attenuates and the wave pressure below the water surface is relatively uniform; (4) a dimensionless mathematical model is established; (5) the test data of each working condition are substituted into the mathematical model to carry out multiple nonlinear regression analysis, and a calculation coefficient is fitted to finally establish an explicit calculation formula for calculating the maximum wave pressure of the inclined dam surface. The application solves the technical problem that the existing empirical formula is inaccurate in predicting the landslide surge wave pressure because it is based on a vertical dam body or a wind wave condition, and provides a reliable basis for evaluating the safety threat of the surge to the dam and the protection design.

The invention relates to the technical field of structural response simulation, in particular to a ship container wave pressure intensity simulation method and system.According to the ship container wave pressure intensity simulation method and system, a frequency value, a direction angle, an energy coefficient, a pressure amplitude and a phase quantity form a unified frequency domain vector based on Fourier transform, and a surface element pressure history is reconstructed moment by moment according to a time step length; wave loads are distributed in a spectral domain phase consistent mode, frequency component phase superposition and navigational speed and course deviation are synchronously transmitted to all time points, surface element pressure courses correspond to sea condition spectrum parameters one by one, a displacement difference value and a permissible gap limit value are read on a node layer through a penalty function method, and the sea condition spectrum parameters are obtained; penalty coefficients are selected according to constraint types to generate penalty quantities, the penalty quantities are superposed to node pressure records along with time steps, supporting, limiting and allowable movement states are quantified into penalty terms and are updated along with iteration increments, constraint strength is uniformly controlled by a penalty coefficient grade table, and grids and material input can be reused only by replacing a matrix and a penalty coefficient library during working condition switching.

Provided is an artificial intelligence overtopping prediction device including first and second pressure measurement parts 103 and 105 configured to measure a collision pressure of waves colliding with a marine structure 10 and a pressure of waves introduced into a road surface 20, an overtopping alert part 109 configured to collect images around the overtopping prediction device 100 and output an alert sound, an information collection and control part 107 including a drone storage 170 configured to fly the drone 202, and a collection controller 160 configured to control the overtopping prediction device 100, receive and store the wave pressure information and the overtopping amount information, and transmit the information to an overtopping prediction system 500 to predict and generate overtopping prediction information, and a frame part 101 including a support frame 110. Also, disclosed herein is an overtopping prediction system using the artificial intelligence overtopping prediction device 100.

This invention belongs to the field of ocean wave observation technology and discloses a wave parameter inversion method based on a pressure sensor array under strong tidal conditions. The method includes synchronously acquiring pressure time series and mean water depth of the pressure sensor array; constructing a dynamic localized tidal model for each sensor and generating tidal forecast sequences; calculating the common pattern of the tidal forecast sequences of all sensors in the array and subtracting it from the original data; then performing singular value decomposition on the subtracted data matrix to obtain a pure wave pressure signal; and using the array cross-spectrum matrix and fusing the main tidal current direction extracted from the local tidal model as a priori constraints, employing an iterative maximum likelihood method with a penalty function to invert the high-resolution wave direction spectrum. This invention can effectively separate wave signals under conditions of short observation sequences, strong tidal interference, and data discontinuity, completely preserving long-period wave information, eliminating tidal residual inconsistencies between sensors, and significantly improving the accuracy and stability of wave direction inversion.

The application belongs to the technical field of ocean wave observation, and discloses a wave parameter inversion method under strong tidal environment based on a pressure sensor array. The method comprises the following steps: synchronously collecting pressure time sequences and average water depths of the pressure sensor array; for each sensor, a dynamic localized tidal model is constructed and a tidal prediction sequence is generated; a common mode of tidal prediction sequences of all sensors of the array is calculated and deducted from original data, and a singular value decomposition is performed on the deducted data matrix to obtain pure wave pressure signals; based on an array cross-spectrum matrix and by fusing a tidal current main flow direction extracted from the local tidal model as a priori constraint, an iterative maximum likelihood method with a penalty function is used to invert a high-resolution wave direction spectrum. The application can effectively separate wave signals under the conditions of short observation sequences, strong tidal interference and data discontinuity, completely retain long-period wave information, eliminate tidal residual inconsistency between sensors, and significantly improve wave direction inversion accuracy and stability.

The application discloses a resonant cavity pressure feedback control method for infrasound wave generation and relates to the technical field of industrial control. The resonant cavity pressure feedback control method for infrasound wave generation comprises the following steps: S1, obtaining pre-wave cavity pressure observation data and performing time axis repositioning and period scale unification; S2, calculating a peak value phase difference, and evaluating pre-wave pressure window adaptation; S3, evaluating cavity pressure loss sequence deviation, and performing cavity pressure loss state feature matching; and S4, constructing a control direction matrix, writing a closed-loop control vector into a controller, and generating a lock identification. The application effectively improves the stability of resonant cavity pressure concentration, pressure relief control and frequency lowering in the infrasound wave generation process, and solves the problem that existing infrasound wave generating equipment can only rely on driving frequency or driving power adjustment, and it is difficult to determine whether an effective pressure window is formed in front of a quarter wavelength in the cavity.

This application relates to the field of drilling technology, specifically to a shale pressure transmission experimental device and its usage method. The device includes a core holder, a high-pressure fluid supply module connected to the upstream end of the core holder, an upstream loading module, a confining pressure loading module connected to the confining pressure chamber of the core holder, a vacuum pumping module connected to the core holder, and a downstream receiving module connected to the downstream end of the core holder. Specifically, the upstream loading module includes a wave loading component, which is used to superimpose a time-varying wave pressure onto the downstream pressure provided by the high-pressure fluid supply module, and apply the superimposed wave pressure to the upstream end of the core sample. This more closely resembles the actual drilling process, including mud pump pulsation, pump start-up and shutdown, and circulating pressure fluctuations, thereby improving the simulation capability of the shale pressure transmission experiment for the real downhole environment and enabling more accurate acquisition of the pressure transmission response law under wave pressure conditions.