The Use of Wavelets to Facilitate Finite Element Post-Processing

摘要

In modern computational mechanics, typically, but not exclusively using Finite Element techniques, solution parameters are tabulated for discrete points in the problem domain. A typical large dynamic analysis may have a complex 3D geometry modelled with a million elements, with results tabulated over a large number of time steps. From this enormous 4D data set, the stress engineer must select appropriate cross-sections in order to visualise the most significant features. The choice of such cross-sections is usually subjective, based on experience and engineering intuition. Typically, the data set will be manipulated in a high specification server, and the graphical information will be pushed down the network to engineer's local machine. However, there are three practical disadvantages: 1. the graphical computation can be time consuming - each cross-section through the model can take several minutes to load, 2. selection of views is by trial and error, and 3. interactive demands on the server interfere with its performance on the other large finite element analyses, which it is processing.