Predicting the collision damage of steel ring-stiffened cylinders and their residual strength under hydrostatic pressure

Thang, Quang; Muttaqie, Teguh; Park, Sang‐Hyun; Shin, Hyun Kyoung; Cho, Sang-Rai

doi:10.1016/j.oceaneng.2018.09.041

Cited by 24 publications

(10 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The stiffened cylindrical shell can increase its critical buckling load under the same weight and reduce its sensitivity to initial defects [4] . Do [5] applied failure load to four cylindrical shells and two perfect cylindrical shells under hydrostatic pressure to obtain their ultimate strength, and verified the results of numerical simulation with it. Finally, the design formula of ring stiffened cylindrical shells under dangerous conditions was derived.…”

Section: Introductionmentioning

confidence: 77%

The Ultimate Strength of Ring Stiffened Cylindrical Shell and Its Influence Factors

Zhang¹,

Hui²,

Zhi-quan³

2020

JTAS

View full text Add to dashboard Cite

Calculating the modes of cylindrical shell, then embed them into ideal perfect cylindrical pressure-resistant shell as the initial geometric imperfections to form the modal. According to the characteristics of each mode, the first 30 modes can be classified into four types, and it is found that the mode of the first type is the worst defect form. By calculation, the cylinder shell has the minimum ultimate strength when the 23rd mode happened. The sensitivity analysis of cylindrical shells with initial geometric defects shows that the critical buckling load has approximate linear relationship with different thickness radius ratio and defect amplitude. Six cylindrical shells of different materials are selected for research, and it is found that although the modal orders of the worst geometric defects of various materials are not the same, they all belong to the first type of mode. The comparison showed that the 921 steel and 909 steel materials are economic.

show abstract

Section: Introductionmentioning

confidence: 77%

The Ultimate Strength of Ring Stiffened Cylindrical Shell and Its Influence Factors

Zhang¹,

Hui²,

Zhi-quan³

2020

JTAS

View full text Add to dashboard Cite

show abstract

“…Therefore, efficient and accurate assessment methods for evaluating the effect of the damage are vital for decision making. The operators need to decide the immediate repair actions by evaluating the effects of the damage on the safety of the platform through residual strength assessment procedure [3]. Figure 1.…”

Section: Introductionmentioning

confidence: 99%

“…However, the residual strength of dented Figure 1. Damaged platform column [3] In operation, LTPs members must carry significant axial loads from the deck down while also resisting hydrostatic external pressure. Based on the availability of a large database of reported experiments and design guides for ultimate strength tests on intact fabricated stringer and /or ring-stiffened cylinders, the case of intact cylinder buckling in offshore structures is well understood [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…However, the case studies were only performed on small-scale stringer-stiffened cylinders. Recently, Do et al [20] and Cho et al [21] provided details of four ring-stiffened cylinders, namely, RS-C-1, RS-C-2, RS-C-3, and RS-C-4. The model had seven bays and separated by six flat-bar ring-stiffeners.…”

Section: Introductionmentioning

confidence: 99%

“…Nowadays, nonlinear finite element methods (NFEM) are great tools to forecast ship and offshore cylinder structural collisions. It is also the convenience and economic efficiency to perform the full Do, Q. T., et al / Journal of Science and Technology in Civil Engineering scale of reality structures where all boundary conditions and material properties can be included [19][20][21][22]. Therefore, the best way to evaluate the ultimate strength after collisions between ship and offshore cylinders is carefully performed the NFEM.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Numerical studies on residual strength of dented tension leg platforms under compressive load

Thang

Huynh

Tran

2020

STCE

Self Cite

View full text Add to dashboard Cite

This paper focuses on numerical investigations and derived formulation to evaluate the residual strength of tension leg platforms (TLPs) with the local denting damage under axial compression loading. The damage generation scenarios in this research are represented the collision accidents of offshore stiffened cylinders TLPs with supply ships or floating subjects. The finite element model is performed using a commercial software package ABAQUS, which has been validated against the experiments from the authors and other researchers. Case studies are then performed on design examples of LTPs when considering both intact and damaged conditions. Based on the rigorous numerical results, the new simple design formulations to predict residual strength of dented TLPs are derived through a regression study as the function of a non-dimensional dent depth. The accuracy and reliability of the derived formulation are validated by comparing it with the available test results in the literature. A good agreement with existing test data for ship-offshore structure collisions is achieved. Keywords: dented stringer-stiffened cylinder; residual strength; tension leg platforms (LTPs); axial compression; residual strength formulation.

show abstract

Experimental and Numerical Investigations on the Fracture Response of Tubular T-joints Under Dynamic Mass Impact

Thang

Cho

Nguyen

2021

Lecture Notes in Mechanical Engineering

View full text Add to dashboard Cite

Predicting the collision damage of steel ring-stiffened cylinders and their residual strength under hydrostatic pressure

Cited by 24 publications

References 25 publications

The Ultimate Strength of Ring Stiffened Cylindrical Shell and Its Influence Factors

The Ultimate Strength of Ring Stiffened Cylindrical Shell and Its Influence Factors

Numerical studies on residual strength of dented tension leg platforms under compressive load

Experimental and Numerical Investigations on the Fracture Response of Tubular T-joints Under Dynamic Mass Impact

Contact Info

Product

Resources

About