Comparison of two different approaches for making design sensitivity analysis an integrated part of finite element analysis

1991 ◽  
Vol 3 (3) ◽  
pp. 149-156 ◽  
Author(s):  
M. E. M. El-Sayed ◽  
K. W. Zumwalt
Keyword(s):  
Finite Element Analysis ◽  
Sensitivity Analysis ◽  
Finite Element ◽  
Design Sensitivity ◽  
Design Sensitivity Analysis ◽  
Element Analysis

Development of a Design Sensitivity Analysis Technique for Explicit Finite Element Software With Applications in Crashworthiness

2000 ◽  
Author(s):  
Douglas W. Stillman
Keyword(s):  
Sensitivity Analysis ◽  
Finite Element ◽  
Time Integration ◽  
Design Sensitivity ◽  
Design Sensitivity Analysis ◽  
Element Analysis ◽  
Automotive Safety ◽  
Explicit Finite Element ◽  
Finite Element Software ◽  
Analysis Technique

Abstract Design Sensitivity Analysis (DSA) is a widely used technique in many areas of finite element analysis, but one that hasn’t yet become available for industrial problems in crashworthiness and automotive safety. In the following effort, an implementation of DSA in the automotive safety simulation program, Radioss, is described. Radioss is a non-linear structures program using an explicit time integration method. A full set of DSA equations are developed and integrated into Radioss so that the design sensitivities can be computed directly and accurately as a result of a single crashworthiness simulation. Some validation results are included. The resulting methodology promises to be an extremely useful tool for engineers involved in the design of safety and crashworthiness of automobiles.

Design Sensitivity Analysis of Structure-Induced Noise and Vibration

1997 ◽  
Vol 119 (2) ◽  
pp. 173-179 ◽  
Author(s):  
K. K. Choi ◽  
I. Shim ◽  
S. Wang
Keyword(s):  
Sensitivity Analysis ◽  
Numerical Method ◽  
Variational Equation ◽  
Adjoint Operator ◽  
Design Sensitivity ◽  
Design Sensitivity Analysis ◽  
Adjoint Variable ◽  
Element Analysis ◽  
Modal Frequency ◽  
Noise And Vibration

A continuum design sensitivity analysis (DSA) method for dynamic frequency responses of structural-acoustic systems is developed using the adjoint variable and direct differentiation methods. A variational approach with a non-self-adjoint operator for complex variables is used to retain the continuum elasticity formulation throughout derivation of design sensitivity results. It is shown that the adjoint variable method is applicable to the variational equation with the non-self-adjoint operator. Sizing design variables such as the thickness and cross-sectional area of structural components are considered for the design sensitivity analysis. A numerical implementation method of continuum DSA results is developed by postprocessing analysis results from established finite element analysis (FEA) codes to obtain the design sensitivity of noise and vibration performance measures of the structural-acoustic systems. The numerical DSA method presented in this paper is limited to FEA and boundary element analysis (BEA) is not considered. A numerical method is developed to compute design sensitivity of direct and modal frequency FEA results. For the modal frequency FEA method, the numerical DSA method provides design sensitivity very efficiently without requiring design sensitivities of eigenvectors. The numerical method has been tested using passenger vehicle problems. Accurate design sensitivity results are obtained for analysis results obtained from established FEA codes.

The Application of ABAQUS in Finite Element Analysis of CFRD

2012 ◽  
Vol 466-467 ◽  
pp. 165-169
Author(s):  
Xiang Li Huo ◽  
Bo Wang ◽  
Zong Kun Li
Keyword(s):  
Finite Element Analysis ◽  
Sensitivity Analysis ◽  
Finite Element ◽  
Dam Construction ◽  
Element Analysis ◽  
Univariate Sensitivity Analysis ◽  
Rockfill Dam ◽  
Reservoir Impoundment ◽  
Concrete Face ◽  
Concrete Face Rockfill Dam

The deformations and stresses of a concrete face rockfill dam (CFRD) for dam construction and reservoir impoundment were simulated by the element add/remove technique of ABAQUS. And, the sensitivity analysis of main parameters of the Duncan-Chang E-B model was carried out by the method of univariate sensitivity analysis and the critical sensitivity parameters of the deformation and stress on the CFRD were obtained. This research has some guidance and reference for future similar projects design and monitoring.

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