167 results about "Surface element" patented technology

The invention discloses a road slope modeling method based on an unmanned aerial vehicle inspection route, and relates to the technical field of unmanned aerial vehicle inspection. The method comprises the following steps: measuring the road slope length, the landform and the geological complexity, and selecting an adaptive unmanned aerial vehicle type and sensor combination according to the road slope length, the landform and the geological complexity; planning unmanned aerial vehicle surface inspection and shallow geological exploration routes, ensuring space matching, and synchronously obtaining high-resolution images and ground penetrating radar data; and processing image data through a photogrammetry technology, generating a digital elevation model and an orthophoto map, and combining to construct a three-dimensional model of the earth surface. Geophysical inversion is carried out on the ground penetrating radar data, reflection features are extracted and projected to the ground surface three-dimensional model, and space correlation between the ground surface and a shallow layer structure is established; the reflection features are digitalized and geometrically reconstructed into three-dimensional surface elements, the three-dimensional surface elements are embedded into an earth surface model to form a three-dimensional geologic body model, time dimensions are introduced, and a dynamic evolution model is constructed. According to the dynamic evolution model, the dynamic analysis of the slope stability is realized.

The invention provides a as-built drawing multi-element extraction and vectorization method and device, equipment and a storage medium. Relates to the technical field of as-built drawing processing. The method comprises the following steps: segmenting a as-built drawing to obtain binary mask images of a field parcel, a road, a water channel, a building and a wellhead; performing opening and closing operation, morphological smoothing, noise removal and / or hole filling operation on each binary mask image to generate an optimized single-category mask; dividing the optimized single-category masks into three categories of planar elements, linear elements and point-shaped elements according to geometric types of the elements, and respectively adopting a vectorization strategy to generate vector files; and writing the geographic coordinate system and the projection parameters of the as-built drawing into the corresponding vector file to generate an independent layer file with geographic coordinate reference. According to the method, the as-built drawing element extraction precision, the complex element processing capability and the vectorization quality and efficiency are remarkably improved, and the robustness of the model in a complex scene is enhanced.

The invention discloses a non-uniform hexahedral mesh generation method based on a region density distribution rule, and relates to the technical field of software development technologies, and the method comprises the following steps: S1, for a solving target, carrying out mesh generation by adopting triangular surface elements, and dividing regions according to different region densities to obtain the maximum and minimum mesh sizes corresponding to each region; s2, after the step S1 is executed, grid lines are sequentially generated in the Cartesian coordinate system according to the x dimension, the y dimension and the z dimension, optimization is started from the area with the minimum maximum grid size, and the maximum grid size is obtained; the method has the advantages that the conversion from a triangular surface element grid to a non-uniform hexahedral grid is realized through modules for identifying and calculating the density distribution of a triangular surface element region, generating three-dimensional grid lines of a Cartesian coordinate system, reconstructing a ray intersecting hexahedral grid, outputting the grid and the like; the problems of mesh generation and geometric target modeling of a finite difference time domain (FDTD) method are solved.

The invention provides an underwater multi-mode intelligent sensing method for a marine ranch, and the method comprises the following steps: introducing a sonar sensing mode based on a YOLO underwater multi-mode detection module, and constructing a dynamic self-adaptive multi-mode sensing system; semantic SLAM and dense coarse mapping are carried out; the semantic SLAM and dense coarse mapping process comprises the steps of preprocessing, initialization and joint optimization of visual-inertial data, dense mapping based on surface elements and semantic fusion mapping; physically-driven 3D GS fine reconstruction is carried out, wherein the 3D GS fine reconstruction comprises initial 3D GS modeling and underwater medium estimation and compensation; and outputting the multi-scale semantic map. According to the invention, the physical imaging model is embedded into the 3DGS rendering process, and the attenuation coefficient and the scattering parameter are estimated through iteration, so that the color fidelity of the reconstructed scene is improved. And compared with the traditional method, the reconstruction loss of the compensated image and the original image is obviously reduced.

The arrangement comprises a projection system (22) for microlithography and a wall element (28) for thermally shielding the projection system (22) from an illumination system (10). The projection system (22) has an object field that can be illuminated by the illumination system (10) and optical elements (M1-M6) for imaging the object field onto an image plane (21). The wall element (28) also includes a passive shielding surface element (30) arranged in a transition region between a last beam section (41) of the illumination system (10) and a first beam section (42) of the projection system (22). According to the invention, the arrangement further comprises an active cooling element (31) positioned in the transition region, with a cooling surface (32) that extends at least partially along a surface area of ​​the passive shielding surface element (30).The active cooling element positioned in the transition area can significantly reduce the rate of change of the heat flow from the lighting system to the projection system.

The invention relates to the technical field of industrial parameter design, in particular to an industrial design system and method. The method comprises the following steps: obtaining a to-be-laid industrial structural member; performing to-be-laid layer curved surface model reconstruction on the to-be-laid layer industrial structural member, and performing surface element discretization processing to generate to-be-laid layer discrete geometric surface element data; according to the discrete geometric surface metadata of the to-be-laid layer, carrying out laying layer direction field identification, and generating laying layer direction field data; according to the layering direction field data, carrying out layering process analogue simulation, solving stress, strain and displacement distribution on each surface element, and obtaining surface element mechanical state data; performing process defect analysis according to the surface element mechanical state data to obtain layering process defect data; and performing intelligent layering process parameter combination based on the layering process defect data so as to realize industrial structural member shell layering design. According to the invention, the intelligent design of the layering process of the complex curved surface industrial structural member is realized.

The invention relates to a two-dimensional and three-dimensional boundary point association method based on improved boundary point coding and a medium, and the method comprises the steps: carrying out the preprocessing of original land parcel red line data, sequentially numbering land parcels, converting all the land parcels into plane boundary point elements, determining a first boundary point in each plane boundary point element, processing each land parcel into a clockwise land parcel, and carrying out the coding of the clockwise land parcels. Performing two-dimensional boundary point continuous numbering on all vertexes of the land parcel, taking the land parcel after encoding the two-dimensional boundary points as a two-dimensional surface element, and converting the land parcel into a land parcel three-dimensional stereoscopic model comprising three-dimensional boundary points, boundary lines and boundary surfaces; and continuously numbering all the three-dimensional boundary points in sequence by using a cross section analysis method to obtain a land block after coding the three-dimensional boundary points, and establishing an association relationship between the three-dimensional boundary points with successfully matched coordinates and the corresponding two-dimensional boundary points. Therefore, automatic coding of the three-dimensional boundary points of the land parcel red line data and automatic association between the two-dimensional boundary points and the three-dimensional boundary points are realized, and the three-dimensional boundary point management efficiency in land parcel management is improved.

The invention relates to a multi-target structured scene electromagnetic calculation method based on a bounce ray algorithm, and the method comprises the steps: generating a corresponding ray tube based on a surface element for a structured complex scene; ray tube tracking is accelerated by adopting a BVH method; and completing ray tube electromagnetic calculation by adopting a GPU parallel calculation mode to obtain an electromagnetic scattering characteristic result corresponding to the structured complex scene. Compared with the prior art, aiming at single-target and multi-target structured scenes, a bounce ray (SBR) method is developed, a ray tube is constructed through a triangular patch, ray tracing is carried out based on forward and backward rays, a hierarchical bounding volume acceleration tree structure is adopted in the ray tracing process to improve the calculation efficiency of the SBR method, GPU acceleration calculation is adopted in the scattered field calculation process, and the calculation efficiency of the SBR method is improved. The bottleneck that a traditional moment method is low in calculation efficiency when processing a large scene and a physical optical method is limited in calculation precision can be broken through, and the calculation efficiency and the calculation precision are effectively improved.

The invention discloses a high-fidelity dynamic sea-sky scene infrared three-dimensional imaging modeling simulation method and device, and relates to the technical field of computer simulation, and the method comprises the steps: obtaining the scene information of a sea-sky scene three-dimensional model in each frame according to a preset time interval; converting the current sea spectrum into an ocean grid height field so as to determine the position and the property of the ocean water body micro surface element; establishing a full-link sea-sky scene infrared radiation link transmission model according to the position and the property of the ocean water body micro surface element; the full-link sea-sky scene infrared radiation link transmission model is used for describing the transmission process that radiation energy starts from a target or background radiation source and reaches a detector after being attenuated by the environment; after a script file is generated according to the full-link sea-sky scene infrared radiation link transmission model, the scene information and the script file are imported into a rendering engine, and rendering is completed. According to the invention, the reflection condition of the real ocean to the sun can be better simulated, and the authenticity is improved when the dynamic change scene of the sea surface is simulated.

The application provides a curved surface optical element surface defect scattering detection method and system, which comprises the following steps: setting a pre-focusing incident light beam in a detection light path, so that the incident light beam forms a virtual object point behind the curved surface optical element; adjusting the distance from the virtual object point to the vertex of the curved surface to satisfy a conjugate relationship with the distance from the detector to the vertex of the curved surface; discretizing the illuminated local curved surface region into an array of micro surface elements; calculating the projection of the unit vector of the scattered light and the unit vector of the incident light on the local tangent plane of each micro surface element to establish a local spatial frequency mapping relationship; performing surface-detector geometric modeling, micro surface BRDF calculation, radiation transmission and irradiance calculation of the scattered light field, constructing a curved surface scattering physical model and reconstructing the irradiance distribution on the detector target surface; performing total integral scattering processing on the irradiance distribution to identify defects, extracting the power spectral density of the defect region to obtain five frequency domain characteristic values, and inputting the five frequency domain characteristic values into a machine learning classifier for defect classification.

The invention belongs to the technical field of OVT domain pre-stack time migration imaging, and particularly relates to an OVT piece division method for a subdivision surface element observation system. The method comprises the following steps: firstly, calculating the non-longitudinal and longitudinal coverage times of an OVT sheet divided according to a conventional observation system, obtaining the non-longitudinal and longitudinal coverage times of the OVT sheet divided according to a subdivision surface element observation system by combining the non-longitudinal and longitudinal surface element sizes and the non-longitudinal and longitudinal surface element sizes of the subdivision surface element observation system, and then calculating the non-longitudinal and longitudinal coverage times of the OVT sheet divided according to the subdivision surface element observation system by combining the non-longitudinal and longitudinal maximum offset. And obtaining non-longitudinal and longitudinal division scales of the OVT sheet divided according to the subdivision surface element observation system, and dividing the OVT sheet by using the non-longitudinal and longitudinal division scales so as to carry out subsequent regularization and offset processing work. The method can effectively solve the problem that traditional OVT piece division is not suitable for the subdivision surface element observation system, and a feasible method is provided for processing the OVT domain of the subdivision surface element observation system.

The invention relates to an arrangement comprising a projection system (22) for microlithography and a wall element (28) for thermally shielding the projection system (22) with respect to a lighting system (10). The projection system (22) has an object field which can be illuminated by the lighting system (10) and optical elements (M1-M6) for imaging the object field into an image plane (21). The wall element (28) additionally comprises a passive shielding surface element (30) which is arranged in a transition region between a last beam portion (41) of the lighting system (10) and a first beam portion (42) of the projection system (22). According to the invention, the arrangement also has an active cooling element (31) which is positioned in the transition region and has a cooling surface (32) which extends at least partially along a surface area of the passive shielding surface element (30). With the aid of the active cooling element positioned in the transition region, a rate of change of the heat flow from the lighting system into the projection system can be significantly reduced.

The invention belongs to the technical field of electromagnetic field calculation, and discloses a method and a system for calculating an electromagnetic scattering field of a moving target coated with a lossy dispersive medium. The method comprises the following steps: firstly, carrying out three-dimensional modeling on a target surface by adopting triangular surface elements to form a model file, and importing the model file into a main program to obtain geometric feature data of a target; secondly, carrying out relativistic coordinate transformation on the space-time component by utilizing Lorentz transformation, and mapping a dynamic problem to an inertial coordinate system synchronous with a target; then establishing an equivalent reflectivity model for the lossy dispersive medium coated area by adopting a transmission matrix method; then efficiently solving a transient scattering field in the motion coordinate system by adopting a time domain physical optical method; and finally, reconstructing a calculation result to a laboratory coordinate system through inverse Lorentz transformation, and outputting electromagnetic field distribution in a dynamic scene. Through the method provided by the invention, the electromagnetic scattering field of the moving target coated with the lossy dispersive medium can be quickly calculated.

The invention relates to the technical field of geotechnical engineering, in particular to a rock joint surface roughness measuring method and system. The method comprises the steps of firstly obtaining a triangular mesh of a rock surface; further based on the spatial distribution of the unit external normal vector in the global coordinate system, carrying out shielding detection on the local surface elements along a shearing reverse direction, and screening out potential contact surface elements; further analyzing each potential contact surface element in the global coordinate system, and calculating frictional sliding work in combination with preset working condition parameters; the rock mass supporting thickness is further obtained, and root cutting work is calculated in combination with preset working condition parameters and the projection area of the shear plane; root cutting work and friction sliding work are further compared, an energy consumption mode is marked, a shear energy consumption digraph is constructed, and equivalent shear resistance roughness is calculated, so that the problem that thin ridge bulges which are easy to cut off are counted into the roughness by mistake under high stress in a traditional method is solved, and stress-sensitive effective roughness measurement is realized.

Embodiments of the present application provide a method and device for constructing a surface element sub-area of a three-dimensional observation system and electronic equipment. The method for constructing a surface element sub-area of a three-dimensional observation system comprises: converting an established orthogonal observation system template into a cross arrangement template according to parameters of a target three-dimensional observation system; generating shot-receiver distance data information of a surface element sub-area of the target three-dimensional observation system according to the cross arrangement template; obtaining a number of surface elements and a coverage frequency of the surface element sub-area of the target three-dimensional observation system according to distribution information of a center point of a shot-receiver pair in the cross arrangement template; establishing a blank surface element sub-area of the target three-dimensional observation system according to the coverage frequency and the number of surface elements; and assigning shot-receiver distance data information to each surface element of the blank surface element sub-area in sequence according to a corresponding relationship between an arrangement rule of a shot-receiver pair in the target three-dimensional observation system and an arrangement rule of a shot-receiver pair in the cross arrangement template, to obtain surface element sub-area data after full coverage.

The application discloses a high angle of attack nonlinear separated flow aerodynamic force correction method, which comprises the following steps: obtaining aircraft surface pressure distribution data at zero reduced frequency by using a DES method; dividing surface elements on the surface area of the aircraft, and generating an AIC matrix AIC by using a dipole grid method based on the geometric information of each surface element; obtaining the aerodynamic force and moment of each surface element according to the AIC, and generating an aerodynamic force matrix A DLM,k＝0 of all surface elements at zero reduced frequency by using the aerodynamic force and moment of each surface element; interpolating the aircraft surface pressure distribution data obtained by using the DES method to each surface element to obtain the aerodynamic force matrix A DES of all surface elements; obtaining a force correction matrix W according to A DLM,k＝0 and A DES ; correcting the AIC matrix AIC by using the force correction matrix W to obtain a corrected aerodynamic force influence coefficient matrix AIC * ; and performing aerodynamic force correction and aeroelastic calculation by using the corrected aerodynamic force influence coefficient matrix AIC * , so as to complete the high angle of attack nonlinear separated flow aerodynamic force correction. The application can have both the calculation precision of CFD and the calculation efficiency of an engineering method.

Aspects described herein disclose a full-viewing-angle depth information construction method. Aspects provide for obtaining a virtual scene, the virtual scene including a camera configured to present a view of the virtual scene in a direction of at least one viewing angle and at least one virtual object, generating a plurality of surface elements in the virtual scene, a surface element being a plane figure having a direction and a size and wherein each virtual object has at least one surface element. Aspects further provide for obtaining a depth value of each of the plurality of surface elements, the depth value being a distance value between the surface element and the camera and constructing full-viewing-angle depth information of the virtual scene by using the obtained depth values. Aspects provided herein reduce time and processing resources for constructing the full-viewing-angle depth information and while improving quality of the full-viewing-angle depth information.

This invention discloses a method, system, medium, and device for determining the reference pH value for acid etching to regulate the surface state of a material. The method includes: first, acquiring a test electrode containing the material to be treated; measuring the change in electrode resistance with temperature within a preset environmental condition and temperature range to obtain the resistance-temperature relationship; performing linear fitting on this relationship to determine a fitted straight line; and obtaining the material's conductivity activation energy based on the slope of the fitted straight line; determining the chemical bonds that preferentially break in the acid etching environment and the charge transfer number during the breaking process, based on the material's crystal structure and chemical bond characteristics; and finally, calculating the theoretical reference pH value for acid etching based on the conductivity activation energy and charge transfer number. Acid etching based on this reference pH value can effectively adjust the surface morphology and surface elemental composition of the material while ensuring the stability of the main material structure, significantly improving the consistency and reliability of the acid etching effect, and solving the problem of relying on experience to select the pH value in traditional processes.

The invention provides a laser real-time positioning and mapping SLAM method and device based on surface element characteristics, and the method comprises the steps: carrying out the parameterization processing of a continuous time motion track of a robot, and obtaining a parameterization result; according to the parameterization result, the initial pose of the robot is calculated; obtaining point cloud data of the space where the robot is located, obtaining surface elements of the space where the robot is located according to the point cloud data of the space where the robot is located, and performing surface element matching calculation on the surface elements of the space where the robot is located based on a preset time threshold to obtain a surface element matching result; according to the surface element matching result and the initial pose of the robot, calculating the corrected pose of the robot; updating the continuous time movement track of the robot according to the corrected pose of the robot; and according to the updated continuous time motion trail of the robot, the pose of the robot is updated and calculated. According to the invention, robot trajectory updating and pose estimation with higher precision can be realized in a complex environment based on a continuous time trajectory optimization framework.

An image-processing device generates a three-dimensional model of a background scene of the image frame based on three-dimensional information about the background scene. The image-processing device defines a three-dimensional bounding box of the object in the three-dimensional model. The image-processing device defines a centre coordinate in the three-dimensional model and a colour value of surface elements of the three-dimensional bounding box. The image-processing device determines a three-dimensional coordinate of a surface in the three-dimensional model which reflects light from a surface element into the camera, by tracing rays from the centre coordinate and based on a normal of the surface. The image-processing device further identifies a first pixel in the image frame corresponding to the three-dimensional coordinate and detects the reflection of the object.

The application discloses a fast and accurate mutual coupling electromagnetic scattering area distinguishing method, belongs to the technical field of electromagnetic scattering characteristic calculation, determines the maximum boundary of the whole ship target, and decomposes the target into a plurality of local solid closed boundaries, positions each surface element, determines the array space to which each surface element belongs, and generates an incident ray tube for the directly visible surface element of the target, and all the ray tubes have triangular cross sections; the array space in which the surface element exists multiple scattering relationship with the reflection ray tracing of the first surface element is utilized to lock the search in the corresponding array space after decomposition; the surface element capable of generating multiple scattering with the first surface element is screened, and the improved Z-Buffer algorithm suitable for electromagnetic scattering calculation is adopted to perform shielding discrimination, so as to exclude two visible surface elements shielded by the intermediate surface element. The application greatly improves the calculation efficiency on the basis of ensuring the precision through adaptive ray tube division.

The invention relates to a gap seal (10) for sealing a gap between a movable platform (64) and a frame (66) of a loading bridge (12), comprising a sealing profile (14) formed from at least one elongated, strip-shaped, reversibly deformable surface element (18). To improve the gap seal in terms of ease of manufacture and durability, the surface element (18) is formed into a loop (20) such that a first strip-shaped surface area (22) and a second strip-shaped surface area (24), located on the same side of the surface element (18) and spaced apart from each other, are attached to one another in a direction towards each other.As a result, a first longitudinal edge area (26) of the sealing profile (14) is formed as a thinner fastening area (28) relative to the loop (20), while on the second longitudinal edge area (32) of the sealing profile (14) the thicker loop (20) is formed relative to the fastening area (28), which elastically deforms accordingly in the gap (62) to create a seal.

This invention discloses a numerical inversion method for nonlinear stress fields, comprising: selecting a study area and constructing a three-dimensional geological model; discretizing the boundary surface of the three-dimensional geological model into multiple surface elements, assigning a nonlinear variation coefficient to each surface element to generate the nonlinear variation coefficient of the model boundary surface; determining the stress components with significant influence on the study area based on measured geostress values ​​as linear boundary conditions applied to the model; adjusting the nonlinear coefficients of the linear boundary conditions to obtain nonlinear boundary conditions; determining the calculated stress component values ​​at measured points under preset working conditions based on the nonlinear boundary conditions; determining the regression coefficients for each preset working condition using the principle of linear superposition and the least squares method based on the measured and calculated stress component values; and generating a nonlinear geostress field based on the nonlinear boundary conditions and regression coefficients and a numerical calculation model. This method achieves the loading of nonlinear stress boundaries, thereby determining the optimal nonlinear geostress field.

The present application relates to a kind of acoustic radiation fast estimation method of fluid domain structure, belong to acoustic radiation estimation technical field, wherein, the method includes: establishing structure model;Structure model includes the coupling surface of structure and fluid domain, coupling surface includes multiple first surface elements, and first surface element includes structure node;Establish fluid domain model;Fluid domain model also includes above-mentioned coupling surface;The coupling surface of fluid domain model includes the second surface element corresponding to first surface element;First pulsating pressure information on second surface element is obtained by fluid dynamics simulation;Second pulsating pressure information of each structure node is obtained by mapping first pulsating pressure information on second surface element to the structure node on the first surface element corresponding to second surface element by neural network model, by neural network model to the structure node on the first surface element corresponding to second surface element;Second pulsating pressure information is used to determine the acoustic radiation of structure.The present application improves the estimation efficiency and the convergence of calculation of the acoustic radiation of structure with fluid domain.

This disclosure provides an object imaging method based on spherical surface elements for penetrating radar surround detection, which can be applied in the field of radar technology. The object imaging method includes: acquiring a target model; determining the centroid of triangular surface elements based on the vertices of these elements; projecting the triangular surface elements onto the surface of a corresponding curvature sphere to obtain a surface element corresponding to the triangular surface element, wherein the center of the curvature sphere is determined based on the geometric center of the target model, and the radius of the curvature sphere is determined based on the distance between the centroid and the geometric center of the triangular surface element; determining the distance information between the surface element and the penetrating radar; processing the radar parameters and distance information of the penetrating radar using a predetermined echo signal function to obtain a second echo signal; and imaging the target object based on the second echo signal to obtain an imaging result.

The invention belongs to the technical field of oil and gas seismic exploration, and particularly relates to a three-dimensional observation system surface element attribute display method. A target surface element in a work area is subjected to square grid division in the same mode under a theoretical observation system and a design observation system, the length and the width displayed in the target surface element are the maximum offset, and the length of each square grid is the shot line distance; counting the number of coverage times corresponding to each square grid, wherein the number of coverage times refers to the number of offset pairs of which the offset length belongs to the square grid; according to the statistical result, the correlation between the theory and the design of the target surface element is evaluated, the target surface element is displayed according to the correlation evaluation result, and the difference between the theory and the design can be visually known, so that proper remedial measures can be selected when the correlation evaluation result does not meet the requirement.

The invention relates to a microwave thermal imaging-based stealth coating damage area three-dimensional reconstruction method, which belongs to the technical field of measurement, solves the problem of insufficient reconstruction accuracy of stealth coating damage in the prior art, and comprises the following steps: S1, carrying out microwave thermal imaging treatment on a stealth coating with damage to obtain an infrared temperature cloud picture of the surface of the stealth coating; s2, processing to obtain a to-be-reconstructed invisible coating damage area; s3, dividing a to-be-reconstructed invisible coating damage area into triangular surface element grids of a plurality of planes; s4, the center of each triangular surface element grid obtained through division is calculated, the center temperature of each triangular surface element grid is obtained, and the generalized reflectivity of the center of each triangular surface element grid is calculated; s5, calculating the depth of the center of each triangular surface element grid; s6, constructing a triangular body element by combining the depth of the center of each triangular surface element grid; and S7, combining all the triangular voxels to obtain the damage area of the three-dimensional reconstructed stealth coating.

This invention discloses a method for inverting spatial thermal radiation data based on micro-surface element theory, comprising the following steps: S1, acquiring BRDF data from multiple angles, and simultaneously acquiring measured directional emissivity data of the target rough surface; obtaining initial data; S2, fitting the initial data from S1 to the initial physical emissivity model based on micro-surface element theory; S3, applying the measured directional emissivity data of the target rough surface to the initial physical emissivity model for fitting. If the model does not meet the standard, the model parameters are automatically adjusted using optimization algorithms such as backpropagation, and iterative fitting is performed until the error meets a preset threshold; if the standard is met, the current model parameter set and structure are locked. This invention offers high precision and strong physicality; by using a small amount of measured emissivity data to correct and fine-tune the model, high-precision target emissivity information can be quickly obtained under different roughness conditions.

To provide a simulator allowed to suppress the lowering in accuracy of simulation even where an object has a curved surface.SOLUTION: A simulator comprises: an input section that inputs a simulation condition including information representative of a shape and position of an object arranged in an analysis space and fluid flowing in the analysis space and initial and boundary conditions; a processing section that defines a plurality of secondary curved-surface elements to reproduce a surface of the object, arranges a plurality of fluid particles representative of the fluid in the analysis space and calculates the shortest distance from respective ones of the plurality of fluid particles to the secondary curved-surface elements and furthermore calculates, on the respective ones of the plurality of fluid particles, a force to undergo from the surface of the object based on a calculation value of the shortest distance and determines a behavior of the plurality of fluid particles based on the force calculated; and an output section that information reflecting the behavior of the plurality of fluid particles is outputted.SELECTED DRAWING: Figure 7