9 results about "Steady state simulation" patented technology

The application discloses an air insulation structure verification method and device based on surface flashover voltage calculation, a terminal equipment and a storage medium, and belongs to the technical field of voltage testing. The method comprises the following steps: obtaining an original structure parameter set; establishing a three-dimensional model according to the original structure parameter set; performing steady-state simulation on the three-dimensional model to obtain an initial electric field distribution; correcting the initial electric field distribution according to surface roughness to obtain a first corrected electric field distribution; performing transient simulation on the three-dimensional model to obtain a surface charge density distribution; correcting the first corrected electric field distribution according to the surface charge density distribution to obtain a second corrected electric field distribution; accumulating the volume with a second corrected electric field value not less than a preset gas critical ionization field strength to obtain a critical volume; and calculating the surface flashover voltage based on the critical volume, and verifying the original insulation structure according to the surface flashover voltage. Therefore, by implementing the application, the problem of inaccurate surface flashover voltage calculation in the prior art can be solved.

This invention relates to a brake disc optimization method, device, and medium based on four-factor constraints. The method includes: obtaining the mass of a target brake disc; establishing a model with an undercarriage structure based on the parameters of the target brake disc, and obtaining the maximum limiting temperature of each part; performing optimization design without exceeding the original mass to obtain the optimized brake disc; performing CFD steady-state simulation to calculate the steady-state cooling pump air ratio; when the maximum temperature is lower than the maximum limiting temperature, determining whether it meets the preset optimization target based on the steady-state cooling pump air ratio; performing CFD transient simulation analysis on candidate brake discs to calculate the transient cooling pump air ratio; when the maximum temperature is lower than the maximum limiting temperature, determining whether it meets the optimization target based on the transient cooling pump air ratio; if so, the target brake disc is the preferred brake disc. Compared with the prior art, this invention solves or partially solves the problem that existing brake disc optimization methods lack constraints during the optimization process, leading to unsatisfactory optimization.

The application relates to the technical field of hydrogen production by water electrolysis, and particularly provides a method and system for establishing a simulation model of an alkaline water electrolysis hydrogen production system, which comprises the following steps: establishing dynamic mathematical models of an electrolytic tank subsystem and an auxiliary subsystem of the alkaline water electrolysis hydrogen production system; connecting the models of the electrolytic tank subsystem and the auxiliary subsystem according to the input-output relationship of the system, taking the gas-liquid two-phase flow work medium flow as the input, taking the temperature and pressure of the work medium at the outlets of the subsystems as the output, performing simultaneous solution, and obtaining the model of the alkaline water electrolysis hydrogen production system; performing steady-state simulation by using system design parameters, and in the case of passing the consistency verification, building a PID control module, and determining the control strategy of the simulation model of the alkaline water electrolysis hydrogen production system. The application realizes the dynamic simulation of the changes of internal physical parameters and external performance of the electrolytic tank under various working conditions by analyzing the component models of the alkaline water electrolysis hydrogen production system and establishing the dynamic mathematical models of the components.

This invention belongs to the technical field of high-field magnet structure design, specifically involving an adaptive selection method for simulation type in pulse magnet structure design. The method includes: establishing a model of the pulse magnet; using a circuit model to calculate the actual current waveform of the magnet at the required power supply voltage; importing this waveform into an electromagnetic finite element model to calculate the peak electromagnetic load of the magnet; applying this load as a single step load to the structural finite element model; extracting the stress-time curve of each target component; and extracting the fundamental component of this curve using Fourier transform to determine the natural vibration frequency of the component. ω m Perform a Fourier transform on the actual current waveform to determine its fundamental component. ω i If all target components ω m All are greater than N × ω i If a steady-state simulation evaluation is selected, then this invention can solve the problem of the lack of a standardized operating system in the existing pulse magnet structure design that can reasonably use static analysis results to approximate transient analysis results.

This application provides a method and apparatus for designing control laws for a thermally managed combined power unit, belonging to the field of aerospace electromechanical systems. The method includes: establishing mathematical models for the core components of the thermally managed combined power unit; constructing an initial steady-state simulation model by combining flow rate, pressure, and energy conservation relationships; revising the initial steady-state simulation model to obtain a faithful steady-state simulation model; building a transient simulation model based on the faithful steady-state simulation model, incorporating mode switching logic, fuel supply strategy, control target selection rules, and system safety boundaries, and designing a basic control law; employing a particle swarm optimization algorithm, using the fuel control PID parameters of the transient simulation model as the optimization object, and using mode switching time, system overshoot, and power turbine exhaust temperature as optimization indicators to optimize the control parameters of the transient simulation model; updating the optimized parameters to the transient simulation model to obtain a transient simulation model of the thermally managed combined power unit.

The application belongs to the technical field of laser, and discloses a steady-state simulation method, equipment and storage medium of a solid laser. A pump source model is constructed to calculate pump light intensity and photon flux; a crystal heat source distribution is solved based on the pump light intensity, a three-dimensional temperature field and a thermal lens focal length are obtained by using a step-by-step Fourier solving method; the stability is analyzed by dynamically updating the equivalent g parameter and the curvature radius of the resonant cavity by using the thermal lens focal length; the pump absorption and gain distribution are calculated in combination with the pump light intensity, the photon flux and the crystal boundary reflection characteristics; the pump-laser mode overlap factor is calculated based on the beam parameter calculated according to the equivalent g parameter, the pump light intensity and the laser light intensity; the laser threshold power is calculated, and the output power is calculated in combination with the threshold power and the input pump power; the steady-state laser field is iteratively solved based on the equivalent g parameter, the thermal lens focal length and the gain distribution, and finally the simulation result is output, the dynamic coupling feedback of the thermal lens focal length and the resonant cavity parameter is realized, and the simulation precision is significantly improved.

A method for constructing an equivalent electromagnetic transient model of a wind turbine that reflects energy balance transfer includes: a controlled current source module considering the energy balance transfer between the impeller and rotor sides, used to describe the transient steady-state energy transfer process of wind energy captured by the wind turbine impeller through the mechanical transmission shaft system, generator, and to the unit-side converter; a controlled voltage source module considering the energy balance transfer between the DC bus side and the grid-side converter, used to describe the energy transfer process between the wind turbine's DC bus side and the grid through the grid-side converter; determining the fundamental frequency amplitude of the controlled voltage source according to the wind turbine control strategy; determining the harmonic amplitude based on the equivalent switching devices; and a controlled power interaction module, where the controlled current source is connected to the grid in parallel with the controlled voltage source via an uncontrolled rectifier bridge to realize the interaction between the controlled current source and the controlled voltage source. This invention can accurately reflect the energy balance transfer process from wind energy captured by the wind turbine to electrical energy, improving simulation efficiency while ensuring the accuracy of the model's transient steady-state simulation.

The application relates to the technical field of optimization control of energy storage power converters, and particularly provides a high-voltage battery energy storage power converter optimization system and method, which comprises a working condition simulation module, a loss calculation module and a comprehensive analysis module; the working condition simulation unit is used for performing transient state simulation on the high-voltage battery energy storage power converter; the loss calculation unit is used for calculating the loss of the high-voltage battery energy storage power converter in the transient state simulation environment; and the comprehensive analysis unit is used for comprehensively optimizing the high-voltage battery energy storage power converter based on the loss of the high-voltage battery energy storage power converter in the transient state simulation environment. The technical scheme provided by the application can provide a basis for three-level converter control, modulation strategy algorithm selection, device parameter selection and thermal design.