Proceedings of the Korean Institute of Navigation and Port Research Conference (한국항해항만학회:학술대회논문집)
- 1998.04a
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- Pages.120-127
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- 1998
A Study on the estimation of an equivalent system of a local vibration system of a huge structure and the Optimum Structural Modification Method
거대 구조물의 국부진동계의 등가계 산출과 이를 이용한 최적구조변경법
Abstract
It is very difficult to execute the vibration analysis of a huge strucutre, which takes up much time and expense. In this paper we intend to make the equivalent system of a local vibration system of a huge structure with a view to improving the dynamic characteristics and reducing time and expense. First of all, upper deck structure model is maded. And we perform the vibration analysis by the Substructure Synthesis Method and execute the exciting test for the upper deck structure model, and observe the coincidences of two results to confirm the reliability of the analyzing tools used. To make the equivalent system, we give boundary condition to sub-structure that want to be modified and execute the Sensitivity Analysis Method and the Optimum Structural Modification Method. And we execute the structural modification of the equivalent system.. The following can be found from this study. 1. The analytical results are generally coincident with each other. 2. The equivalent system of the superstructure model can be easily obtained using the sensitivity analysis metho and the optimum structural modification method. 3. The structural modification using the equivalent system can be obtained good results above 90% of object value.
Keywords
- Huge Structure;
- Equivalent System;
- Substructure Synthesis Method;
- Boundary Condition;
- Sensitivity Analysis;
- Optimum StructuralModification
- 거대구조물;
- 등가시스테미부분구조합성법;
- 경계조건;
- 감도해석법;
- 최적구조변경법;