Department News
Design Sensitivity Analysis(DSA) and Optimization of Transient Dynamic Response
Seminar Date
2000-06-15
Author
관리자
Date
2000-06-15
Views
1178
1. 제목 : Design Sensitivity Analysis(DSA) and Optimization of
Transient Dynamic Response
2. 연사 : 조 선 호 박사 (Engineer, JEEP CAE, Daimler Chrysler
Corporation)
3. 일시 : 1999년 12월 23일 (목요일) 16:00
4. 장소 : 301동 301호
5. 내용 :
A continuum-based design sensitivity analysis (DSA) method is developed for the transient dynamic response of nonlinear structural systems with rate-independent elastic -plastic material under large strain and large rotation assumptions using the established nonlinear finite element code DYNA3D.
The explicit central difference method and the finite element method are incorporated for time and physical domain discretization, using the updated Lagrangian formulation, respectively. An elastic-plastic material model, with rate-independent plasticity, that involves the isotropic/kinematic hardening effect is incorporated. The radial return method, along with the secant iteration method under plane plasticity assumption is used to enforce the consistency condition. Hughes-Liu truss/beam element formulation is used to account for the large strain effect. The Jaumann rate of Cauchy stress, the rate of deformation tensor, and the Jaumann rate based incrementally objectives stress integration scheme are employed to handle the large rotation effect.
A numerical example demonstrates the erroneous DSA results may accumulate when the design sensitivity of the variable time step is used. Numerical implementation of sizing and configuration DSA of truss and beam structures with impact loads are carried out for several engineering problems. Finally, the design sensitivity information is used for the iterative sizing and configuration design optimization of the vehicle frame and the A-piller models.
6. 연사 약력 :
1988 서울대학교 조선해양공학과, 석사
1988-1990 Research Engineer, KIA Research Institute, KIA Motors,
Seoul, KOREA
1998 The University of Iowa, Iowa City, U.S.A., Ph.D
1998-현재 Engineer, JEEP CAE, Daimler Chrysler Corporation,
Detroit
7. 연락처 : 기계항공공학부 김승조 교수 (전화 : 880-7388)
Transient Dynamic Response
2. 연사 : 조 선 호 박사 (Engineer, JEEP CAE, Daimler Chrysler
Corporation)
3. 일시 : 1999년 12월 23일 (목요일) 16:00
4. 장소 : 301동 301호
5. 내용 :
A continuum-based design sensitivity analysis (DSA) method is developed for the transient dynamic response of nonlinear structural systems with rate-independent elastic -plastic material under large strain and large rotation assumptions using the established nonlinear finite element code DYNA3D.
The explicit central difference method and the finite element method are incorporated for time and physical domain discretization, using the updated Lagrangian formulation, respectively. An elastic-plastic material model, with rate-independent plasticity, that involves the isotropic/kinematic hardening effect is incorporated. The radial return method, along with the secant iteration method under plane plasticity assumption is used to enforce the consistency condition. Hughes-Liu truss/beam element formulation is used to account for the large strain effect. The Jaumann rate of Cauchy stress, the rate of deformation tensor, and the Jaumann rate based incrementally objectives stress integration scheme are employed to handle the large rotation effect.
A numerical example demonstrates the erroneous DSA results may accumulate when the design sensitivity of the variable time step is used. Numerical implementation of sizing and configuration DSA of truss and beam structures with impact loads are carried out for several engineering problems. Finally, the design sensitivity information is used for the iterative sizing and configuration design optimization of the vehicle frame and the A-piller models.
6. 연사 약력 :
1988 서울대학교 조선해양공학과, 석사
1988-1990 Research Engineer, KIA Research Institute, KIA Motors,
Seoul, KOREA
1998 The University of Iowa, Iowa City, U.S.A., Ph.D
1998-현재 Engineer, JEEP CAE, Daimler Chrysler Corporation,
Detroit
7. 연락처 : 기계항공공학부 김승조 교수 (전화 : 880-7388)
