Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Iterated Improved Reduced System (IIRS) Method Combined with Sub-Structuring Scheme (I) - Undamped Structural Systems -

부구조화 기법을 연동한 반복적인 동적 축소법 (I) - 비감쇠 구조 시스템 -

  • 최동수 (서울대학교 기계항공공학부) ;
  • 김현기 (현대중공업 기술개발본부) ;
  • 조맹효 (서울대학교 기계항공공학부)
  • Published : 2007.02.01
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Abstract

This work presents an iterated improved reduced system (IIRS) procedure combined with sub-structuring scheme for large structures. Iterated IRS methods are usually more efficient than others because the dynamic condensation matrix is updated repeatedly until the desired convergent values are obtained. However, using these methods simply for large structures causes expensive computational cost and even makes analyses intractable because of the limited computer storage. Therefore, the application of sub-structuring scheme is necessary. Because the large structures are subdivided into several (or more) sub-domains, the construction of dynamic condensation matrix does not require much computation cost in every iteration. This makes the present method much more efficient to compute the eigenpairs both in lower and intermediate modes. In Part I, iterated IRS method combined with sub-structuring scheme for undamped structures is presented. The validation of the proposed method and the evaluation of computational efficiency are demonstrated through the numerical examples.

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References

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