DOI QR코드

DOI QR Code

Integrated Structural Dynamic Response Analysis considering the UNDEX Shock Wave and Gas Bubble Pulse

수중폭발 충격파와 가스구체 압력파를 함께 고려한 구조물의 동적응답해석

  • Lee, Sang-Gab (Korea Maritime University, Division of Naval Architecture and Ocean System Engineering) ;
  • Hwon, Jeong-Il (Korea Institute of machinery & Materials, e-Engineering Research Center) ;
  • Chung, Jung-Hoon (Korea Institute of machinery & Materials, e-Engineering Research Center)
  • 이상갑 (한국해양대학교 조선해양시스템공학부) ;
  • 권정일 (한국기계연구원 e-엔지니어링센터) ;
  • 정정훈 (한국기계연구원 e-엔지니어링센터)
  • Published : 2007.04.20

Abstract

Two typical impact loadings, shock wave and gas bubble pulse, due to UNDEX(UNDerwater EXplosion), should be considered together for the closest response analysis of structure subjected to UNDEX to a reality. Since these two impact loadings have different response time bands, however, their response characteristics of structure are different from each other. It is impossible to consider these effectively under the current computational environment and the mathematical model has not yet been developed. Whereas Hicks model approximates the fluid-structure interaction due to gas bubble pulse as virtual mass effect, treating the flow by the response of gas bubble after shock wave as incompressible ideal fluid contrary to the compressible flow due to shock wave, Geers-Hunter model could make the closest response analysis of structure under UNDEX to a real one as a mathematical model considering the fluid-structure interaction due to shock wave and gas bubble pulse together using acoustic wave theory and DAA(Doubly Asymptotic Approximation). In this study, the application and effectiveness of integrated dynamic response analysis of submerged structure was examined with the analysis of the shock wave and gas bubble pulse together.

Keywords

References

  1. 권정일, 이상갑, 정정훈, 2005a, 'MIL-S-901D 부유식 충격시험기의 충격응답해석,' 대한조선학회 논문집, 제 42권, 제 5호, pp. 493-498 https://doi.org/10.3744/SNAK.2005.42.5.493
  2. 권정일, 이상갑, 정정훈, 2005b '이중 탄성지지 주기관 모듈의 MIL-S-901D 중중량 충격시험 수치시뮬레이션,' 대한조선학회 논문집, 제 42권, 제 5호, pp. 499-505 https://doi.org/10.3744/SNAK.2005.42.5.499
  3. 권정일, 정정훈, 이상갑, 2005c, '해석모델링 방법에 따른 선체거더의 수중폭발 휘핑응답해석,' 대한조선학회 논문집, 제 42권, 제 6호, pp. 631-636 https://doi.org/10.3744/SNAK.2005.42.6.631
  4. 권정일, 정정훈, 이상갑, 2005d, '휘핑계수-수중폭발 가스구체 압력파 크기의 척도,' 대한조선학회 논문집, 제 42권, 제 6호, pp. 637-643 https://doi.org/10.3744/SNAK.2005.42.6.637
  5. 이상갑, 권정일, 정정훈, 2003, '캐비테이션을 고려한 부유구조물의 3차원 수중폭발 충격응답 해석,' 대한조선학회 논문집, 제40권, 제 6호, pp. 1-11
  6. 정정훈, 2003, '수중폭발 충격하중에 대한 함정 내 충격 강화 지침,' 한국기계연구원
  7. Geers, T.L. and Hunter, K.S., 1996, 'Dilational Dynamics of an Underwater Explosion Bubble,' Proceedings of 67th Shock & Vibration Symposium
  8. Geers T.L. and Hunter K.S., 2002, 'An Integrated Wave-effects Model for an Underwater Explosion Bubble', J. Accoust. Soc. Am., Vol. 111, No. 4, pp. 1584-1601 https://doi.org/10.1121/1.1458590
  9. Hicks. A.N., 1970, 'Effect of Bubble Migration on Explosion-induced Whipping in Ships,' Technical Report 3301, Naval Ship Research and Development Center, Bethesda, MD
  10. Shin, Y.S. and Derunts, J.A., 1996, 'USA/LS-DYNA3D Software Training Course', Vol. V

Cited by

  1. Structural Response and Reliability of a Cylindrical Array Sensor due to Underwater Explosion vol.22, pp.1, 2012, https://doi.org/10.5050/KSNVE.2012.22.1.081