3.4.11 Frequency extraction for substructures

Product: ABAQUS/Standard  

Element tested

B21   

Feature tested

Frequency extraction analysis for substructures.

Problem description

The substructures defined in each generation file are identical, each consisting of 10 B21 beam elements. In each case one of the substructure's ends is fixed. In addition, in the file psupfre2_gen1.inp a local coordinate system is defined for all nodes using the *TRANSFORM option; and in the file psupfre3_gen1.inp the substructure is rotated by 90° using the *SUBSTRUCTURE PROPERTY option.

Results and discussion

The results from the substructure analysis match the results that are obtained when the substructures are not used.

Input files

psupfre1.inp

B21 elements.

psupfre1_gen1.inp

Substructure generation file referenced in the analysis psupfre1.inp.

psupfre2.inp

B21 elements; a local coordinate system is defined for all nodes using the *TRANSFORM option.

psupfre2_gen1.inp

Substructure generation file referenced in the analysis psupfre2.inp.

psupfre3.inp

B21 elements; the substructure is rotated using the *SUBSTRUCTURE PROPERTY option.

psupfre3_gen1.inp

Substructure generation file referenced in the analysis psupfre3.inp.