Method for creating finite element three-dimensional entity based on terrain remote sensing data

A technology for remote sensing data and three-dimensional entities, which is applied in image data processing, electrical digital data processing, special data processing applications, etc., and can solve problems such as distortion and deviation of numerical simulation results.

Inactive Publication Date: 2013-07-10
BEIJING UNIV OF TECH
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  • Claims
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for the application of terrain remote sensing data in finite element software, so that based on the actual observation of terrain remote sensing data, a simulation three-dimensional site model can be established in general f

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  • Method for creating finite element three-dimensional entity based on terrain remote sensing data
  • Method for creating finite element three-dimensional entity based on terrain remote sensing data
  • Method for creating finite element three-dimensional entity based on terrain remote sensing data

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[0023] Operating environment: Linux

[0024] Software support: FWTools, GMT, Cubit

[0025] Scripts: convert.pl, block_DEM.py

[0026] Data source: from http: / / srtm.csi.cgiar.org Download the terrain remote sensing data package srtm_12_03.zip and decompress it. The range of latitude and longitude is Latitude min: 45 N max: 50 N, Longitude min: 125 W max: 120 W.

[0027] 1. Use the FWTools-2.0.6 software package to extract vector data from the terrain remote sensing data package, that is, to extract the text format vector data from the remote sensing image Geotiff format, and the obtained data file contains latitude, longitude and elevation information.

[0028] Specific operation: run in the linux terminal

[0029] FWTools-2.0.6 / bin_safe / gdal2xyz.py srtm_12_03.img > srtm_12_03.xyz

[0030] Suppose the research area is Latitude min: 46.1 N max: 46.3 N Longitude min: 122.1 W max: 122.3. You need to use the GTM software package to extract from Latitude min: 45 N max: 50 N Lo...

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Abstract

The invention discloses a method for creating a finite element three-dimensional entity based on terrain remote sensing data, and belongs to the technical field of earthquake engineering. The method comprises the following specific steps: extracting latitude and longitude information-containing vector data from an integrated remote sensing data packet; converting the latitude and longitude information-containing vector data from a latitude and longitude coordinate format to a format which can be recognized by finite element software to obtain a finite element recognizable vector data format; reading finite element recognizable vector data, and transversely reading in the data point by point to generate scattered points; transversely scanning the scattered points in rows to generate a spline curve; longitudinally scanning the spline curve to generate a curved surface; generating a spare entity, penetrating the curved surface through the spare entity, combining the curved surface and the spare entity, and extracting a section, four surfaces below the section and connected with the section, and a bottom surface of the spare entity to generate a new entity by using the six closed curved surfaces, wherein the entity takes the section as an upper surface, namely the curved surfaces are embossed onto the three-dimensional entity; and gridding the obtained entity to achieve application of the remote sensing data in the finite element software.

Description

technical field [0001] The invention belongs to the technical field of earthquake engineering, in particular to a method for creating a finite element three-dimensional entity based on terrain remote sensing data. Background technique [0002] The study of earthquake strong ground motion has very important significance for urban planning and earthquake resistance work. In the study of earthquake engineering, the numerical simulation of engineering site ground motion is still relatively weak. The site models currently used for seismic numerical simulation are mostly theoretical models. For example, it is assumed that the bedrock and the upper covering layer are a horizontal interface, It is horizontally layered, but the actual project site has various geomorphology and complex stratum composition. The results calculated by simple theoretical modeling will deviate greatly from the actual situation, and cannot truly reflect the topography and geomorphology of the project site. ...

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Application Information

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IPC IPC(8): G06F17/50G06T17/05
Inventor 郭明珠赵芳李文博姜倩
Owner BEIJING UNIV OF TECH
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