TY - GEN
T1 - Design optimization of structural acoustic problems using FEM-BEM
AU - Kim, Nam H.
AU - Choi, Kyung K.
AU - Dong, Jun
AU - Pierre, Christophe
PY - 2003
Y1 - 2003
N2 - A design optimization procedure of a noise-vibrationharshness (NVH) problem of a complicated vehicle structure is presented by assuming the acoustic pressure does not affect the structural vibration. The steady-state dynamic behavior of the vehicle is calculated from the frequency response finite element analysis, while the sound pressure level within the acoustic cavity is calculated from the boundary element analysis. A reverse solution process is employed for the design sensitivity calculation using the adjoint variable method. The adjoint load is obtained from the acoustic boundary element re-analysis, while the adjoint solution is calculated from the structural dynamic re-analysis. The evaluation of pressure sensitivity only involves a numerical integration process over the structural part where the design variable is defined. A design optimization problem is formulated and solved, where the structural weight is reduced while the noise level in the passenger compartment is lowered.
AB - A design optimization procedure of a noise-vibrationharshness (NVH) problem of a complicated vehicle structure is presented by assuming the acoustic pressure does not affect the structural vibration. The steady-state dynamic behavior of the vehicle is calculated from the frequency response finite element analysis, while the sound pressure level within the acoustic cavity is calculated from the boundary element analysis. A reverse solution process is employed for the design sensitivity calculation using the adjoint variable method. The adjoint load is obtained from the acoustic boundary element re-analysis, while the adjoint solution is calculated from the structural dynamic re-analysis. The evaluation of pressure sensitivity only involves a numerical integration process over the structural part where the design variable is defined. A design optimization problem is formulated and solved, where the structural weight is reduced while the noise level in the passenger compartment is lowered.
KW - Adjoint Variable Method
KW - Boundary Element Analysis
KW - Design Optimization
KW - Design Sensitivity Analysis
KW - Finite Element Analysis
KW - Structural Acoustics
UR - http://www.scopus.com/inward/record.url?scp=85087599284&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85087599284&partnerID=8YFLogxK
U2 - 10.2514/6.2003-1630
DO - 10.2514/6.2003-1630
M3 - Conference contribution
AN - SCOPUS:85087599284
SN - 9781624101007
T3 - 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
BT - 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
T2 - 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 2003
Y2 - 7 April 2003 through 10 April 2003
ER -