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

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.