A solution procedure for constrained eigenvalue problems and its application within the structural finite-element code NOSA-ITACA

作者：Porcelli Margherita^*; Binante Vincenzo; Girardi Maria; Padovani Cristina; Pasquinelli Giuseppe

来源：Calcolo, 2015, 52(2): 167-186.

DOI：10.1007/s10092-014-0112-1

• Eigenvalues
• Finite-element software
• Multipoint constraints
• Modal analysis

The paper presents an efficient and reliable implementation of numerical methods for constrained generalized eigenvalue problems, specialized for the modal analysis of linear elastic structures in a finite-element setting. The implementation, which takes into account the sparsity of the stiffness and mass matrices and the features of master-slave constraints, is based on open-source packages embedded in the finite-element code NOSA-ITACA. Numerical tests on historical building are performed, with the aims of calculating their vibration frequencies and mode shape vectors, comparing them to the results of a general purpose commercial code and assessing the accuracy of the tool developed.

• 出版日期2015-6