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Numerical Study on Estimation of Static Configuration of Steel Lazy Wave Riser Using Dynamic Relaxation Method
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동적이완법을 이용한 Steel Lazy Wave Riser의 정적형상 추정에 관한 수치해석적 연구

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Type
Academic journal
Author
Seunghoon Oh (한국해양과학기술원) Jae-Hwan Jung (한국해양과학기술원) Byeongwon Park (한국해양과학기술원) Yong-Ju Kwon (한국해양과학기술원) Dongho Jung (한국해양과학기술원)
Journal
The Korean Society of Ocean Engineers Journal of Ocean Engineering and Technology Vol.32 No.6(Wn.145) KCI Excellent Accredited Journal SCOPUS
Published
2018.12
Pages
466 - 473 (8page)

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Numerical Study on Estimation of Static Configuration of Steel Lazy Wave Riser Using Dynamic Relaxation Method
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Abstract· Keywords

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This paper presents an estimation method for the static configuration of a steel lazy wave riser (SLWR) using the dynamic relaxation method applied to estimate the configuration of structures with strong geometric non-linearity. The lumped mass model is introduced to reflect the flexible structural characteristics of the riser. In the lumped mass model, the tensions, shear forces, buoyancy, self-weights, and seabed reaction forces at nodal points are considered in order to find the static configuration of the SLWR. The dynamic relaxation method using a viscous damping formulation is applied to the static configuration analysis. Fictitious masses are defined at nodal points using the sum of the largest direct stiffness values of nodal points to ensure the numerical stability. Various case studies were performed according to the bending stiffness and size of the buoyancy module using the dynamic relaxation method. OrcaFlex was employed to validate the accuracy of the developed numerical method.

Contents

ABSTRACT
1. 서론
2. SLWR 정적 평형 해석을 위한 집중질량모델
3. 동적이완법(Dynamic relaxation method)
4. 수치계산 및 결과
5. 결론
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