| dc.description.abstract | With the rapid development of CAD and CAE technology, the use of mold
flow analysis software has become very common in the design of the plastic
injection molding industry. Before the mold flow analysis, the CAD model needs
to be converted into solid meshes. Then, the solid mesh data will be employed to
the solver for calculation. Therefore, the quality of the solid mesh data can affect
the accuracy of the analysis results and the efficiency of the computational time.
If users need more accurate analysis results, they need to manually separate a
model and build structured meshes, which is a very tedious and complicated
process. To assist the construction of structured meshes, our laboratory develops
the technology of ＂feature recognition＂ and ＂feature decomposition＂. Thus, we
can recognize hole features, face types, and protrusion features for thin shell CAD
model, and decompose the CAD model into several regular blocks by which
structured meshes can be built. This research will continue the previously
developed algorithm, continue to develop protrusion recognition and
decomposition technology to improve the recognition and decomposition
integrity and expect this technology can deal with more kinds of CAD models.
First, to recognize the inner and outer protrusion at the same time, the data
structure in the algorithm needs to be organized to achieve this purpose. Secondly,
this study is to develop the recognition and decomposition technology of
symmetric protrusion. In the recognition part, this study is to improve the original
algorithm of the first type of symmetric protrusion, and continue to develop the
second and third types of symmetric protrusion recognition. Then in the
decomposition part, the main feature blocks of each symmetric protrusions are
generated, and connect feature block and the mid-layer feature blocks are
established. Finally, the complete symmetric protrusion decomposition results are
obtained.
Keywords: Protrusion recognition, Protrusion decomposition, Symmetric
protrusion, Structured mesh | en_US |