Continuum Design Sensitivity Analysis of Structural Dynamic Responseusing Ritz Sequence

1990 ◽  
Author(s):  
KYUNG CHOI ◽  
SEMYUNG WANG
Keyword(s):  
Sensitivity Analysis ◽  
Design Sensitivity ◽  
Design Sensitivity Analysis ◽  
Structural Dynamic

A Sequential Adjoint Variable Method in Design Sensitivity Analysis of NVH Problems

2001 ◽  
Author(s):  
N. H. Kim ◽  
K. K. Choi ◽  
J. Dong ◽  
C. Pierre ◽  
N. Vlahopoulos ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Boundary Element ◽  
Design Sensitivity ◽  
Variable Method ◽  
Design Sensitivity Analysis ◽  
Response Analysis ◽  
Adjoint Variable Method ◽  
Adjoint Variable ◽  
Structural Dynamic ◽  
Structural Part

Abstract A design sensitivity analysis of a sequential structural-acoustic problem is presented. A frequency response analysis is used to obtain the dynamic behavior of an automotive structure, while the boundary element method is used to solve the pressure response of an interior, acoustic domain. For the purposes of design sensitivity analysis, a direct differentiation method and an adjoint variable method are presented. In the adjoint variable method, an 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 for the structural part. The proposed sensitivity results are compared to finite difference sensitivity results with excellent agreement.

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