... axial force geometric parameter extrapolation point tubular joint chord peak value three-planar tubular y-joint brace side stress concentration factor chord side scf distribution weld toe curve formula plane ABSTRACT The three-planar tubular Y-joint is normally multiplanar...

... ABSTRACT The hot pot stress (HSS) of a tubular joint is considerable because of the existence of stress concentration along the welding seam. To study the strategy for control stress concentration factor (SCF) of tubular joints, a typical five-planar tubular Y-joints as the connection between...

... ABSTRACT Fatigue is the significant factor resulting in the failure of the support structure for an offshore wind turbine (OWT) subjected to combined hydrodynamic loads and aerodynamic loads. The tubular joints are the weakest component leading to fatigue failure of the whole structure...

... of tubular joints under the axial, in-plane and out-of-plane loads are computed to determine the stress concentration factors. Using conventional Rainflow counting algorithm, the cumulative fatigue damage (CFD) factors for tubular joints can be thus calculated with S-N curves and Palmgren-Miner's rule...

... counting (RFC) and damage equivalent loads (DELs) are derived. Based on this, fatigue life of all welded tubular joints within the jacket is estimated using Miner s rule and the structural stress approach. Crack initiation and crack propagation phases are not accounted for and it is assumed that components...

... load case fatigue analysis subsea system support structure renewable energy environmental condition wind load dynamic response jacket-type support structure calculation guideline offshore wind turbine wave load tubular joint wind energy platform design fatigue damage factor Fatigue...

..., increased strength and stability against compressive loading, enhanced resistance under torsional loads and reduced drag forces when exposed to wind actions. The developing local stress fields in tubular joints with often complex multi-planar geometries are significantly complex. In particular...

... fatigue assessment tubular joint fatigue calculation assessment polar engineering conference transfer function structural analysis proceedings social responsibility procedure stress range subsea system usage factor renewable energy ocean energy sea state calculation fatigue...

... ABSTRACT Fatigue analysis of tubular joints is essential information for the fatigue assessment of jack-up platforms. While the full scale model test for tubular joints is seldom used for fatigue life prediction due to its jumbo size and enormous expenses. This paper attempts to predict...

... and wave loading is computed and different loading scenarios are examined to determine the dominating load on the final result. Further investigation is done to assess the influence of different welding profiles of the tubular joints of the structure on the final fatigue resistance. Results are presented...

... propagation life into a total fatigue life corresponding to a through-thickness propagation of the fatigue crack. The Paris type fatigue crack propagation rule, in contrast, provides a validated approach to quantify the fatigue crack propagation life in realistic, large-scale tubular joint specimens...

... failure and the fracture failure. The design equation proves to be conservative especially for the high β joints. The effects of fracture failure on the cracked joint strength are also investigated. INTRODUCTION Thick-walled circular hollow section (CHS) tubular joints have been widely used in both...

... damage influenced by each condition of ice load, fine-resolution three dimensional finite element modeling method of complicated tubular joints is employed and coupling model of offshore platform global and local structure is established. Finally, fatigue damage of time domain nonlinear dynamic response...

...Low Cycle Fatigue of T-tubular Joints under Axial Loading Marie Hochman1, Marte Madshus2 and Stig Berge Department of Marine Technology, Norwegian University of Technology Trondheim, Norway ABSTRACT Fatigue of tubular T-joints under axial loading was investigated. Five models were tested, three...

... fatigue analysis and yearly probability of wave occurrence. Finally we find that when the natural vibration period of these jackets is close to the wave period, resonance which can cause fatigue problem of tubular joints usually occurs between the jackets and wave. So if you don t have enough confidence...

... this is not practicable or this is insufficient, the fatigue performance can be improved by application of toe grinding, hammer peening and weld profiling etc. to the weldments (Kirhope et al., 1999). One of the fundamental joint configurations often applied in offshore structures is the tubular Joint. In case...

..., California. kip generator unit sustainability renewable energy lower connection installation sdss design storm loading condition tubular joint earthquake orientation support structure base shear storm social responsibility mudline mchaney mark platform inri ocean energy northern...

... ABSTRACT A 3-D finite element model of a cracked CHS T-joint is developed and will form a basis for future linear elastic fracture mechanics analyses on other thick-walled tubular joints. With this model the Stress Intensity Factors (SIF's) for a thick-walled CHS T-joint with a semi-elliptical...

... applicable ranges for these equations, which invalidates their applicability to thick-walled joints. For example, ISO 19002 (2001) states the valid range for the ultimate strength equations to be within 10 ≤ γ ≤ 50. tubular joint choo static strength dependence van der vegte variation ultimate...

... ABSTRACT Stress intensity factor (SIF) solutions are generally used for fatigue assessment of the cracked tubular joints in steel offshore jacket structures. Reliable SIF solutions are necessary for accurate prediction of the residual fatigue life of such joints. For this purpose, more than...