The invention discloses a total flow field numerical simulation method for a finite volume weighted essentially non-oscillatory scheme.Specific steps of the structured grid FVWENO5 (Finite Volume Weighted Essentially Non-oscillatory) scheme are given; then aiming at the Cartesian grid non-body-fitted feature, an object plane boundary is treated through a virtual unit immersed boundary method; a compressible inviscid flow problem of complex objects contained in a flow field can be solved under structured grid coordinates by combining the former operation.A numerical experiment is performed aiming at multiple classic complex analysis examples, and the reliability and effectiveness of the method can be fully verified.

Total flow field numerical simulation method for finite volume weighted essentially non-oscillatory scheme

The invention provides a fluid-solid coupling response calculation method for ceramic matrix composite. The fluid-solid coupling response calculation method comprises the steps: calculating a CMCs unit cell model loading and unloading stress-strain hysteresis curve through a multi-scale method; calculating an obtained loading and unloading hysteresis loop through a unit cell model, interpolating any loading and unloading hysteresis loop response, and using the response as an agent model for fluid-solid coupling solid domain dynamics calculation; on the fluid-solid coupling interface, calculating the fluid load through CFD, writing a program to read the fluid load and map the fluid load to the solid node, reading the displacement of the solid node and mapping the displacement to the fluid node, wherein the same time step length is adopted for the fluid domain and the solid domain. According to the fluid-solid coupling response calculation method, the calculation of the CMCs fluid-solidcoupling response is realized, and the variable stiffness and hysteresis behavior description under CMCs loading and unloading is simple and easy to realize; and the robustness of kinetic solution isgood, and divergence is not easy to occur.

Fluid-solid coupling response calculation method for ceramic matrix composite

The invention relates to a wind turbine blade fluid-solid coupling mode design method. The method comprises following steps: (1)determining the aerodynamic parameters of the blade and dividing the blade equally in the span-wise direction according the wind turbine blade length to obtain n sections, then determining the various structural parameters of the blade and the section airfoil; (2) constructing a three-dimensional model of the blade and importing the three-dimensional model of the blade into analysis software; (3) constructing a flow field calculation model of a wind wheel to determinethe calculation area of the external flow field; a finite element model of the blade is constructed at the same time; (4) setting initial conditions and boundary conditions and calculating to obtainpressure distribution results of the blade under a set condition; (5) setting blade material parameters and corresponding constraints, dividing the grid and partitioning the blade in different directions; (6) extracting the surface pressure distribution data of the blade and performing modal calculation analysis after the pressure is correspondingly loaded into the divided area. (7) calculating the natural frequency of the designed blade and verifying the structural rationality of the designed blade. The blade structure of the invention has reliable design and stable operation.

Wind turbine blade fluid-solid coupling mode design method

The invention discloses unpowered motion prediction of an underwater detection device, and an automatic calculation method thereof. A dynamic model of an establishing device, an equal-duration superposition algorithm and the automatic calculation method are included; the dynamic model of the establishing device comprises drawing of the model, non-structural grid partition of the model, setting of a flow field and model resistance solving; the equal-duration superposition algorithm is an accumulation algorithm established according to an Euler formula and a trapezoid formula improved based on a prediction-correction system, and realized in an automatic calculation manner; and the automatic calculation method comprises three parts including self-defined flow field speed transmission, automatic resistance outward transmission and calculation process automation. The method integrates the dynamic model of the device and seawater power influence; a non-structural grid generation technology is simple to use, reliable and good in self-adaptation; and underwater motion prediction of an unpowered deep sea device can be realized accurately and effectively.

Automatic calculation method for unpowered motion prediction of underwater detection device

The invention discloses a water simulation analysis method based on fluid-solid coupling and an agent model. By designing a GUI (Graphical User Interface) adopting Matlab as a platform, the following modules are constructed: a pre-processing module for adjusting a finite element grid model structure to the required initial state, giving an initial water area range by recognizing the spatial coordinate range of the structure, selecting a corresponding wave model to meet the requirement of the calculated working condition, generating a calculation file and submitting the calculation file to a solver; the solver for performing water simulation calculation on the calculation file based on fluid-solid coupling analysis; a post-processing module for performing filtration and coordinate transformation on the calculation result data according to needs, and drawing and outputting a data curve; and an agent model module for saving the required calculation result, and then generating a corresponding fluid-solid coupling analysis agent model for subsequent water simulation calculation. The method refers to a little software, can output the data required by the actual design process, and is low in calculation cost.

Water simulation analysis method based on fluid-solid coupling and agent model

The present invention relates to a fluid-solid coupling computing method based on a fixed grid technology and belongs to the technical field of fluid-solid coupling simulation. The method comprises the following steps of: A, calling a grid dividing module which adopts two sets of grids including an overall physical area formed by fluid and solid and a solid area; B, calling a fluid field computing CFD module to update a fluid field state variable and simultaneously obtain a force applied to a solid boundary node by the fluid; C, calling a solid computing CSD module to update a solid state variable and simultaneously obtain displacement and speed of the solid boundary node; D, calling a result output module to output the solid state variable and the fluid field information to a file for use in post-processing; and E, judging whether to end computing. According to the fluid-solid coupling computing method, a movable grid module is successfully avoided, so that the computing resources for updating the grid are greatly saved; and the defect that the action force on a fluid-solid interface is hard to calculate accurately because of traditional complex inner grid updating and boundary grid control computing on the basis of movable grid technology can be overcome.

Fluid-solid coupling computing method based on fixed grid technology

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Fluid-solid coupling computing method based on fixed grid technology