Reduction of the structureacoustic problem using normal modes and lanczos vectors
(2003) Proceedings of the Tenth International Congress on Sound and Vibration In Proceedings of the 10th International Congress on Sound and Vibration p.22032210 Abstract
 The coupled structureacoustic problem is studied using the finite element method. An efficient strategy for solving the coupled eigenvalue problem is proposed. The strategy uses a limited number of the uncoupled structural normal modes and acoustic fluid normal modes together with a set of interfacedependant Lanczos vectors for each domain to reduce the coupled problem. The Lanczos vectors are calculated by applying the vectors derived from the movement of the uncoupled modes of the interacting domain. For example, the pressure distribution of the fluid modes are used to generate the Lanczos vectors for the structural domain. This ends up in a very compact coupled eigenvalue problem to be solved. The method is investigated in a numerical... (More)
 The coupled structureacoustic problem is studied using the finite element method. An efficient strategy for solving the coupled eigenvalue problem is proposed. The strategy uses a limited number of the uncoupled structural normal modes and acoustic fluid normal modes together with a set of interfacedependant Lanczos vectors for each domain to reduce the coupled problem. The Lanczos vectors are calculated by applying the vectors derived from the movement of the uncoupled modes of the interacting domain. For example, the pressure distribution of the fluid modes are used to generate the Lanczos vectors for the structural domain. This ends up in a very compact coupled eigenvalue problem to be solved. The method is investigated in a numerical example. (Less)
Please use this url to cite or link to this publication:
http://lup.lub.lu.se/record/612417
 author
 Davidsson, Peter ^{LU} and Sandberg, Göran ^{LU}
 organization
 publishing date
 2003
 type
 Chapter in Book/Report/Conference proceeding
 publication status
 published
 subject
 keywords
 Structureacoustic problem, Interacting domain, Modal reduction, Fluid domain
 in
 Proceedings of the 10th International Congress on Sound and Vibration
 pages
 8 pages
 publisher
 Institute of Acoustics
 conference name
 Proceedings of the Tenth International Congress on Sound and Vibration
 external identifiers

 Scopus:2342423818
 language
 English
 LU publication?
 yes
 id
 4aaa80a6eae64ce18ff92a2f306405ad (old id 612417)
 date added to LUP
 20071128 11:49:52
 date last changed
 20161013 04:45:11
@misc{4aaa80a6eae64ce18ff92a2f306405ad, abstract = {The coupled structureacoustic problem is studied using the finite element method. An efficient strategy for solving the coupled eigenvalue problem is proposed. The strategy uses a limited number of the uncoupled structural normal modes and acoustic fluid normal modes together with a set of interfacedependant Lanczos vectors for each domain to reduce the coupled problem. The Lanczos vectors are calculated by applying the vectors derived from the movement of the uncoupled modes of the interacting domain. For example, the pressure distribution of the fluid modes are used to generate the Lanczos vectors for the structural domain. This ends up in a very compact coupled eigenvalue problem to be solved. The method is investigated in a numerical example.}, author = {Davidsson, Peter and Sandberg, Göran}, keyword = {Structureacoustic problem,Interacting domain,Modal reduction,Fluid domain}, language = {eng}, pages = {22032210}, publisher = {ARRAY(0x9631f40)}, series = {Proceedings of the 10th International Congress on Sound and Vibration}, title = {Reduction of the structureacoustic problem using normal modes and lanczos vectors}, year = {2003}, }