Port-Hamiltonian fluid-structure interaction modelling and structure-preserving model order reduction of a classical guitar

被引:3
|
作者
Rettberg, Johannes [1 ]
Wittwar, Dominik [2 ]
Buchfink, Patrick [2 ]
Brauchler, Alexander [1 ]
Ziegler, Pascal [1 ]
Fehr, Joerg [1 ]
Haasdonk, Bernard [2 ]
机构
[1] Univ Stuttgart, Inst Engn & Computat Mech, Stuttgart, Germany
[2] Univ Stuttgart, Inst Appl Anal & Numer Simulat, Stuttgart, Germany
关键词
structure-preserving model order reduction; port-Hamiltonian systems; fluid-structure interaction; classical guitar; TIME-DOMAIN SIMULATION; NUMERICAL-METHOD; SYSTEMS; FORMULATIONS;
D O I
10.1080/13873954.2023.2173238
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
A fluid-structure interaction model in a port-Hamiltonian representation is derived for a classical guitar. After discretization, we combine the laws of continuum mechanics for solids and fluids within a unified port-Hamiltonian (pH) modelling approach by adapting the equations through an appropriate coordinate transformation on the second-order level. The high-dimensionality of the resulting system is reduced by model order reduction. The article focuses on pH-systems in different state transformations, a variety of basis generation techniques as well as structure-preserving model order reduction approaches that are independent from the projection basis. As main contribution, a thorough comparison of these method combinations is conducted. In contrast to typical frequency-based simulations in acoustics, transient time simulations of the system are presented. The approach is embedded into a straightforward workflow of sophisticated commercial software modelling and flexible in-house software for multi-physics coupling and model order reduction.
引用
收藏
页码:116 / 148
页数:33
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