Finite-element-analysis based visual simulation method and system for bridge collapse

Abstract

The invention provides a finite-element-analysis based visual simulation method and system for bridge collapse, wherein the method comprises the following steps: acquiring bridge model data, bridge distortion data and failure element data through finite element analysis; creating a bridge visual model having a sense of reality according to the bridge model data; implementing bridge collapse distortion animation of a callback mechanism by using the bridge distortion data; creating a fragment graph model on the basis of the failure element data; creating an efficient fragment calculation model according to the fragment graph model; updating the fragment graph model in real time according to the data calculated by a fragment to form fragment motion animation; and combining the bridge distortion animation with the fragment motion animation to form a complete bridge collapse visual simulation process. According to the method provided by the embodiment of the invention, the bridge collapse visual simulation has complete fragment information, the graph incompleteness caused by a failure element in the finite element analysis is made up, and the visual simulation process has good sense of reality and real-time performance.

Description

technical field [0001] The invention relates to the application field of computer technology in bridge engineering, in particular to a visual simulation method and system for bridge collapse based on finite element analysis. Background technique [0002] As an important lifeline project, the collapse accidents of bridges often cause serious casualties and property losses. [0003] The finite element analysis of bridge collapse is a common method in the identification of bridge collapse accidents. In the case of collapse, finite element analysis often produces a large number of failed elements. However, once the element fails, it will no longer participate in subsequent finite element calculations, lacking subsequent calculation data, and will become invisible on the graph. Due to these invisible failure elements, the FEA results of bridges are very incomplete. In the identification of bridge collapse accidents, the comparison between the simulation results and the wreckag...

AI Technical Summary

Problems solved by technology

However, a large number of invisible failure elements caused severe incompleteness of the wreckage graphics in the finite element analysis and could not be used for wreckage comparison

In addition, finite element analysis mainly uses abstract mechanical models, which have a poor sense of reality, and the results of finite element analysis are difficult to achieve real-time rendering speed, which affects the observation of simulation results

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