• Title, Summary, Keyword: 시스템다이나믹스

Search Result 183, Processing Time 0.043 seconds

A Study on the Statistical Model Validation using Response-adaptive Experimental Design (반응적응 시험설계법을 이용하는 통계적 해석모델 검증 기법 연구)

  • Jung, Byung Chang;Huh, Young-Chul;Moon, Seok-Jun;Kim, Young Joong
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
    • /
    • /
    • pp.347-349
    • /
    • 2014
  • Model verification and validation (V&V) is a current research topic to build computational models with high predictive capability by addressing the general concepts, processes and statistical techniques. The hypothesis test for validity check is one of the model validation techniques and gives a guideline to evaluate the validity of a computational model when limited experimental data only exist due to restricted test resources (e.g., time and budget). The hypothesis test for validity check mainly employ Type I error, the risk of rejecting the valid computational model, for the validity evaluation since quantification of Type II error is not feasible for model validation. However, Type II error, the risk of accepting invalid computational model, should be importantly considered for an engineered products having high risk on predicted results. This paper proposes a technique named as the response-adaptive experimental design to reduce Type II error by adaptively designing experimental conditions for the validation experiment. A tire tread block problem and a numerical example are employed to show the effectiveness of the response-adaptive experimental design for the validity evaluation.

  • PDF

Development of a Simplified Vulnerability Analysis Program for Naval Vessel (함정 간이 취약성 해석 프로그램 개발에 대한 연구)

  • Shin, Yun-Ho;Kwon, Jeong-Il;Chung, Jung-Hoon
    • Journal of the Society of Naval Architects of Korea
    • /
    • v.50 no.6
    • /
    • pp.383-389
    • /
    • 2013
  • Analysis and review of survivability is one of the most important aspects when naval vessels are designed. Because aiming points of threat towards the naval vessels in the battle field could not be estimated exactly, probabilistic and statistic approach is frequently introduced to evaluate and enhance the vessel survivability. Some commercial survivability analysis programs are used to perform the analysis for enhancement of susceptibility, vulnerability and recoverability but, they are usually classified and impossible to be exported to other countries because of their national security. In this paper, a simplified vulnerability analysis program is developed to evaluate the vulnerability of the warship in aspects of structure, redundancy and its mission capability at the conceptual design stage. To verify the developed program, the analysis results were compared with those of the commercial program MOTISS(Measure of Total Integrated System Survivability).

A Review on the Blast Resistant Design for Glazing and Window Systems Subject to High-explosive Loadings (공기 중 폭발하중에 대한 창호시스템의 방폭설계 절차에 관한 고찰)

  • Huh, Young-Cheol;Chung, Tae-Young;Oh, Sung-Keun
    • Transactions of the Korean Society for Noise and Vibration Engineering
    • /
    • v.20 no.12
    • /
    • pp.1229-1235
    • /
    • 2010
  • Anti-terrorism design for public buildings as well as military facilities is important to minimize the mass casualties from terrorist attacks. Also, well designed glazing and window systems can reduce the potential injury of human caused by scattering fragment of a glazing. In this paper, blast resistant design for glazing and window systems is investigated based on the U.S. Standard. The design procedures include minimum requirements for the design, standard practice for design evaluation of the glazing and standard test method for evaluation of the performance.

Modeling the Dynamics of Wildbird's Avian Influenza Using the System Dynamics (시스템다이나믹스를 이용한 철새의 AI 전파 모델)

  • Park, Young-wook;Won, Dong-gyu;Choi, Sung-Bae
    • Proceedings of the Korea Contents Association Conference
    • /
    • /
    • pp.1130-1135
    • /
    • 2009
  • Avian Influenza is an infectious desease of birds. The infection can cause a wide spectrum of symptoms in birds, ranging from mild illness to a rapidly fatal diseases which might bring a tremendous economic loss to poultry farms[1]. It can also give fatal diseases to human. Therefore it is important to surveil wildbirds that are primary transportation of avian influenza. This report showed a relationship between avian influenza and a habitat of wildbirds using system dynamics, and concluded with suggestion for surveilance.

  • PDF