Dynamic Behaviour of Inverted Catenary Cold Water Pipelines for Seawater Desalination Project

Saravanan, R.; Bhattacharya, S.; Murthy, M.V. Ramana

doi:10.1007/978-981-13-3134-3_35

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…They studied an "8-shape" motion trajectory caused by the interaction of multi-order modes and high-order harmonic components. Saravanan et al [10] used the measured data of field currents as input to perform a flume experiment on the riser of the inverted catenary. They also conducted numerical analysis with Shear7 and Orcaflex, which yielded results in good agreement with the experiment.…”

Section: Introductionmentioning

confidence: 99%

Study on the Vibration Characteristics of Marine Riser Based on Flume Experiment and Numerical Simulation

Cai

Chan

et al. 2023

JMSE

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This study investigated vortex-induced vibrations of marine risers in Ocean Thermal Energy Conversion systems. Flume experiments were conducted under two conditions: Condition 1 was with a fixed riser bottom, and Condition 2 was with a fixed bottom on a mooring platform. The cross-flow acceleration of the riser was measured at different current velocities, and corresponding vibration responses were analyzed. Numerical simulations based on the flume experiments were employed to validate the reliability of the simulation method. Results from the flume experiments revealed vortex-induced resonance in Condition 1 when the flow velocity approached the riser’s natural frequency. In Condition 2, similar vibration responses were observed, with maximum acceleration occurring during flow velocity-induced vortex-induced vibrations. However, at higher flow velocities, the acceleration response showed a decrease followed by an increase, indicating the excitation of higher-order modes. The numerical simulations matched the flume experiments in Condition 1. In Condition 2, while the acceleration response and frequency agreed during vortex-induced resonance, discrepancies arose in the flow velocity that caused vortex-induced vibrations compared to the flume experiments. This study demonstrated the accuracy of numerical simulations in reflecting vortex-induced vibrations of risers, providing a foundation for further research on complex riser systems.

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Section: Introductionmentioning

confidence: 99%

Study on the Vibration Characteristics of Marine Riser Based on Flume Experiment and Numerical Simulation

Cai

Chan

et al. 2023

JMSE

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Effect of Material Properties in Predicting the Fatigue Life of Offshore Pipelines Subjected to VIV

Saravanan,

Bhattacharya,

Ramana Murthy

et al. 2024

Structural Integrity

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Benchmarking of VIV numerical analysis with prototype response for fatigue assessment of inverse catenary coldwater pipelines

et al. 2023

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High density polyethylene pipe has been used to draw coldwater for low temperature thermal desalination plants since the year 2006 at Lakshadweep Islands, India. The pipeline endured in-line oscillations due to shear current in one of the desalination plants, and this gave an opportunity to observe the response parameters of the prototype pipeline. The recorded oscillation parameters are utilized as a benchmark to verify the results of the vortex induced vibration (VIV) analysis in frequency domain and time domain, and the results show good concurrence. The in-line fatigue damage assessment is carried out for a range of current profiles showing the need for mitigation of pipeline VIV. The helical strakes on a partial length of the pipeline is modeled numerically showing significant suppression of VIV response as well as substantial increase in fatigue life of the pipeline. The benchmarking of the VIV response analysis with prototype measurements enhances the reliability of using numerical VIV fatigue analysis and mitigation measures.

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Dynamic Behaviour of Inverted Catenary Cold Water Pipelines for Seawater Desalination Project

Cited by 3 publications

References 3 publications

Study on the Vibration Characteristics of Marine Riser Based on Flume Experiment and Numerical Simulation

Study on the Vibration Characteristics of Marine Riser Based on Flume Experiment and Numerical Simulation

Effect of Material Properties in Predicting the Fatigue Life of Offshore Pipelines Subjected to VIV

Benchmarking of VIV numerical analysis with prototype response for fatigue assessment of inverse catenary coldwater pipelines

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