A torsional strength analysis on the container ship by means of the finite element procedure and full-scale testing

1971 ◽  
Vol 18 (201) ◽  
pp. 198-214
Author(s):  
Noboru Tanaka ◽  
Shigeo Sanbongi ◽  
Takahiko Kawai
Keyword(s):  
Finite Element ◽  
Full Scale ◽  
Strength Analysis ◽  
Container Ship ◽  
Torsional Strength ◽  
Finite Element Procedure ◽  
Full Scale Testing

scholarly journals A Torsional Strength Analysis on the Container Ship by Means of the Finite Element Procedure and Full-Scale Testing

1970 ◽  
Vol 1970 (127) ◽  
pp. a105-a118
Author(s):  
Noboru Tanaka ◽  
Shigeo Sanbongi ◽  
Takashi Iwaki ◽  
Keisuke Enomoto ◽  
Tsuneo Yoshiki ◽  
...  
Keyword(s):  
Finite Element ◽  
Full Scale ◽  
Strength Analysis ◽  
Container Ship ◽  
Torsional Strength ◽  
Finite Element Procedure ◽  
Full Scale Testing

An Experimental and Numerical Investigation of the Effect of Axial Thermal Gradients in Flexible Pipes

2017 ◽  
Author(s):  
Dag Fergestad ◽  
Frank Klæbo ◽  
Jan Muren ◽  
Pål Hylland ◽  
Tom Are Grøv ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Cross Section ◽  
Measurement Techniques ◽  
Full Scale ◽  
Model Complexity ◽  
Flexible Pipe ◽  
Element Analysis ◽  
Flexible Pipes ◽  
Full Scale Testing

This paper discusses the structural challenges associated with high axial temperature gradients and the corresponding internal cross section forces. A representative flexible pipe section designed for high operational temperature has been subject to full scale testing with temperature profiles obtained by external heating and cooling. The test is providing detailed insight in onset and magnitude of relative layer movements and layer forces. As part of the full-scale testing, novel methods for temperature gradient testing of unbonded flexible pipes have been developed, along with layer force- and deflection-measurement techniques. The full-scale test set-up has been subject to numerous temperature cycles of various magnitudes, gradients, absolute temperatures, as well as tension cycling to investigate possible couplings to dynamics. Extensive use of finite element analysis has efficiently supported test planning, instrumentation and execution, as well as enabling increased understanding of the structural interaction within the unbonded flexible pipe cross section. When exploiting the problem by finite element analysis, key inputs will be correct material models for the polymeric layers, and as-built dimensions/thicknesses. Finding the balance between reasonable simplification and model complexity is also a challenge, where access to high quality full-scale tests and dissected pipes coming back from operation provides good support for these decisions. Considering the extensive full scale testing, supported by advanced finite element analysis, it is evident that increased attention will be needed to document reliable operation in the most demanding high temperature flexible pipe applications.

Torsional Strength Analysis of Output Shaft in Portal Axle Using Finite Element Analysis

2013 ◽  
Vol 284-287 ◽  
pp. 996-1000 ◽  
Author(s):  
Jong Boon Ooi ◽  
Xin Wang ◽  
Ying Pio Lim ◽  
Ching Seong Tan ◽  
Jee Hou Ho ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Experimental Results ◽  
Strength Analysis ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Torsional Strength ◽  
Overall Performance

Portal axle unit is a gearbox unit installed on every end axles of the vehicle. It is installed to the vehicle to give higher ground clearance to enable vehicle to go over large obstacle when driving in off-road conditions. Shafts must be exceptionally tough and lightweight to improve the overall performance of the portal axle unit. In this paper, the shaft is analyzed in three-dimensional model and the stress of the shaft model is analyzed using finite element analysis (FEA). The FEA result is compared with experimental results.

Application of Finite Element Modelling in the Qualification of Large Diameter Unbonded Flexible Risers

2002 ◽  
Author(s):  
Wenchao Zhang ◽  
Justin Tuohy
Keyword(s):  
Finite Element ◽  
Finite Element Modelling ◽  
Oil And Gas ◽  
Large Diameter ◽  
Full Scale ◽  
Flexible Pipe ◽  
Element Modelling ◽  
Norsk Hydro ◽  
Flexible Risers ◽  
Full Scale Testing

Unbonded flexible pipe has a proven track record in the offshore oil and gas industry for more than 20 years. The product is synonymous with the use of floating production systems spanning the water column and connecting subsea structures to facilitate the retrieval of hydrocarbons, provision of water injection systems and the export of processed or semi-processed fluids to main trunk pipelines or onshore. Unbonded Flexible pipe is a technically complex multi-layer structure of helically wound metallic wires and tapes and extruded thermoplastics. In 1996 Wellstream was awarded a major contract for the supply of flexible risers and flowlines as part of the Norsk Hydro Troll Olje Gas Province Development located in 350m water depth 80km west of Bergen. The development consists of two main fields, Troll East (31/3 and 31/6) and Troll West (31/2) which together have an estimated production life in excess of 50 years, making it one of the worlds largest offshore developments. Norsk Hydro is responsible for the development and operation of the production facilities. The scope of supply included 15-inch internal diameter, 213 barg design pressure, dynamic risers for the export of oil and gas from the platform to shore. At contract award, Wellstream was finalising the location of their European Manufacturing site, a facility which would have the capability of manufacturing unbonded flexible pipe with external diameters up to 24-inches. The design, manufacture and qualification of a large diameter oil and gas export riser for service in the Norwegian sector of the North Sea, considered to be one of the most severe environments in the offshore industry, provided unique challenges and attributes. These risers have now been in service for over two year, following an extensive qualification programme. This paper provides an insight into the integrated approach adopted during qualification with the successful application of finite element technology to aid full-scale testing. During a full-scale test program a finite element simulation of a 15 metre long prototype pipe was performed with special emphasis on the evaluation of contact forces between the flexible pipe and a bend limiting structure. The finite element analysis program package ANSYS is chosen for this simulation due to its special feature of contact/target elements. The paper illustrates that the use of Finite Element Modelling is indeed capable of predicting the observed behaviour of prototype risers, which are subjected to a series of dynamic load cases, in a Dynamic Test Rig (DTR). Finally, the paper concludes that focus should now be given to the advantages of using finite element tools that are verified by full scale testing to reduce development costs and schedules.

3D Finite Element Analysis and Full-Scale Testing of a Self-Anchored Suspension Bridge

2014 ◽  
Vol 530-531 ◽  
pp. 251-255
Author(s):  
Jian Rong Yang ◽  
Yu Bai ◽  
Xiao Dong Yang ◽  
Wei Ming Zhu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Suspension Bridge ◽  
Field Testing ◽  
Element Model ◽  
Full Scale ◽  
Three Dimension ◽  
Element Analysis ◽  
3D Finite Element ◽  
Full Scale Testing

Three dimension finite element analysis and full-scale testing are carried out on a newly-built self-anchored suspension bridge. The 3D finite element model of the bridge is generated using a commercially available finite element package. The bridge is modeled under service loads, and the model results are compared to the results of field testing of the structure. Detailed experimental procedure is presented including the data acquisition system, testing truck, and the load distribution. Measured and calculated displacements are in reasonable concordance. And residual deformations meet the specification of the codes, no cracking opening.

Influence of degradation of structure on the behaviour of a full-scale embankment

2012 ◽  
Vol 49 (3) ◽  
pp. 344-356 ◽  
Author(s):  
S. Panayides ◽  
M. Rouainia ◽  
D. Muir Wood
Keyword(s):  
Finite Element ◽  
Constitutive Model ◽  
Pore Water ◽  
Model Comparison ◽  
Field Measurements ◽  
Full Scale ◽  
Numerical Predictions ◽  
Pore Water Pressures ◽  
Finite Element Procedure ◽  
Degradation Of Structure

The advanced constitutive model KHSM for structured clays, which incorporates the effects of loss of structure within an elastoplastic framework, has been implemented in a finite element procedure and used to investigate the failure height and pore-water pressures of embankment A constructed at Saint Alban, Quebec. For the purpose of model comparison, simulations were also performed using the standard bubble model (KHM) without destructuration. The numerical predictions of pore-water pressures and settlements are also compared with field measurements. The results clearly demonstrate the importance of including the effects of loss of structure in the analysis.

Finite Element Analysis of Composite Repairs With Full-Scale Validation Testing

2016 ◽  
Author(s):  
Colton Sheets ◽  
Robert Rettew ◽  
Chris Alexander ◽  
Ashwin Iyer
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Composite Materials ◽  
Scale Validation ◽  
Full Scale ◽  
Element Analysis ◽  
Composite Repair ◽  
Full Scale Tests ◽  
Validation Testing ◽  
Full Scale Testing

Composite repair systems for pipelines are continuing to be used for increasingly difficult and complex applications which can have a high consequence of failure. In these instances, full-scale testing is typically pursued at a high-cost to the manufacturer or operator. Finite element analysis (FEA) modeling is a valuable tool that becomes especially attractive as a method to reduce the number of full-scale tests required. This is particularly true when considering the costs associated with recreating complex load and temperature conditions. In order for FEA to fill this role, it is necessary to validate the results through full-scale testing at the same loads and temperatures. By using these techniques, FEA and full-scale testing can be used in unison to efficiently produce accurate results and allow for the adjustment of critical parameters at a much lower cost than creating additional full-scale tests. For this program, a series of finite element analysis (FEA) models were developed to evaluate the performance of composite materials used to reinforce corroded steel pipe in critical applications at elevated temperatures up to 120 °C. Two composite repair manufacturers participated in the study which was conducted on 12-inch × 0.375-inch Gr. X60 pipes with machined simulated corrosion defects that represented 50% wall loss. Load conditions consisted of axial compressive loads or bending moments to generate compressive stresses in the machined defect. In the described evaluation program, FEA simulations were able to produce results which supported those found in full-scale validation testing. From the FEA models stresses and strains were extracted from the reinforced steel and composite materials. Good correlation was observed in comparing the results. Although limitations of the modeling included accurately capturing differential thermal strains introduced by the elevated test temperature, the results indicated that FEA models could be used as a cost-effective means for assessing composite repair systems in high-temperature applications.

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