文档介绍：AIAA–2001–1320
FUZZY STRUCTURES ANALYSIS OF AIRCRAFT PANELS IN NASTRAN
Victor W. Sparrow∗
The Pennsylvania State University, University Park, PA 16802
Ralph D. Buehrle+
NASA Langley Research Center, Hampton, VA 23681
Abstract a fuzzy structure posed of (1) a well char-
acterized master structure and (2) attached fuzzy
This paper concerns an application of the fuzzy substructures whose details are either unknown or
structures analysis (FSA) procedures of Soize to are imprecisely known. In the context of a tradi-
prototypical aerospace panels in MSC/NASTRAN, tional finite element model, the master structure
a mercial finite element program. A would be that part of the structure amenable to
brief introduction to the FSA procedures is first conventional FEs. The fuzzy substructure would
provided. The implementation of the FSA methods be those parts of the structure essible to tra-
is then disclosed, and the method is validated ditional modeling: missing degrees of freedom, fine
parison to published results for the forced scale structural details, attached equipment, etc.
vibrations of a fuzzy beam. The results of the An implementation of the fuzzy structures concepts
new implementation show excellent agreement to in FEs as originally conceived by Soize is called
the benchmark results. The ongoing effort at Fuzzy Structures Analysis (FSA), a term coine