Efficient response recovery procedures for detailed design of jacket foundations

Martin Bjerre Nielsen, Jacob Fisker Jensen, Dawid Jakub Augustyn, Ronnie Pedersen

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

Resumé

Two efficient system reduction procedures for detailed design of jacket foundations by post-processing of aero-elastic simulation results based on reduced structural models (superelements) are presented. It is illustrated that the full foundation response can be accurately recovered either via a force-controlled approach where the interface forces from the coupled aero-elastic simulations are applied to the non-reduced jacket model along with synchronized hydrodynamic wave loads in a dynamic time simulation, or by direct expansion via the superelement reduction basis. The procedures are illustrated on a coupled aero-elastic model represented by the NREL 5 MW reference wind turbine founded on a comprehensive, high-fidelity jacket model with hydrodynamics defined in Ramboll’s in-house offshore structural analysis program, ROSAP. The performances of both the force-controlled method and the direct expansion approach are compared for superelements based on the Guyan method, the Craig-Bampton method and an augmented Craig-Bampton method. It is shown that the Craig-Bampton method is superior to the Guyan method for dynamic problems irrespective of the recovery method. In particular for cases where wave loads are govern-ing, application of the direct expansion approach calls for the Augmented Craig-Bampton method in order to accurately capture the details of the hydrodynamic loading. It is shown that a compact, yet accurate reduction basis can be obtained by replacing some of the fixed interface modes with load dependent residual vectors.
OriginalsprogEngelsk
TitelInsights and Innovations in Structural Engineering, Mechanics and Computation
Antal sider6
Vol/bind1
ForlagTaylor & Francis
Publikationsdatosep. 2016
Udgave1
Sider2060-2065
ISBN (Elektronisk)9781138029279
DOI
StatusUdgivet - sep. 2016
BegivenhedThe sixth international conference on structural engineering, mechanics and computation - Cape Town, Sydafrika
Varighed: 5 sep. 20167 sep. 2016
Konferencens nummer: 6

Konference

KonferenceThe sixth international conference on structural engineering, mechanics and computation
Nummer6
LandSydafrika
ByCape Town
Periode05/09/201607/09/2016

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Recovery
Hydrodynamics
Structural analysis
Wind turbines
Processing

Citer dette

Nielsen, M. B., Jensen, J. F., Augustyn, D. J., & Pedersen, R. (2016). Efficient response recovery procedures for detailed design of jacket foundations. I Insights and Innovations in Structural Engineering, Mechanics and Computation (1 udg., Bind 1, s. 2060-2065). Taylor & Francis. https://doi.org/10.1201/9781315641645-341
Nielsen, Martin Bjerre ; Jensen, Jacob Fisker ; Augustyn, Dawid Jakub ; Pedersen, Ronnie. / Efficient response recovery procedures for detailed design of jacket foundations. Insights and Innovations in Structural Engineering, Mechanics and Computation. Bind 1 1. udg. Taylor & Francis, 2016. s. 2060-2065
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title = "Efficient response recovery procedures for detailed design of jacket foundations",
abstract = "Two efficient system reduction procedures for detailed design of jacket foundations by post-processing of aero-elastic simulation results based on reduced structural models (superelements) are presented. It is illustrated that the full foundation response can be accurately recovered either via a force-controlled approach where the interface forces from the coupled aero-elastic simulations are applied to the non-reduced jacket model along with synchronized hydrodynamic wave loads in a dynamic time simulation, or by direct expansion via the superelement reduction basis. The procedures are illustrated on a coupled aero-elastic model represented by the NREL 5 MW reference wind turbine founded on a comprehensive, high-fidelity jacket model with hydrodynamics defined in Ramboll’s in-house offshore structural analysis program, ROSAP. The performances of both the force-controlled method and the direct expansion approach are compared for superelements based on the Guyan method, the Craig-Bampton method and an augmented Craig-Bampton method. It is shown that the Craig-Bampton method is superior to the Guyan method for dynamic problems irrespective of the recovery method. In particular for cases where wave loads are govern-ing, application of the direct expansion approach calls for the Augmented Craig-Bampton method in order to accurately capture the details of the hydrodynamic loading. It is shown that a compact, yet accurate reduction basis can be obtained by replacing some of the fixed interface modes with load dependent residual vectors.",
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Nielsen, MB, Jensen, JF, Augustyn, DJ & Pedersen, R 2016, Efficient response recovery procedures for detailed design of jacket foundations. i Insights and Innovations in Structural Engineering, Mechanics and Computation. 1 udg, bind 1, Taylor & Francis, s. 2060-2065, The sixth international conference on structural engineering, mechanics and computation, Cape Town, Sydafrika, 05/09/2016. https://doi.org/10.1201/9781315641645-341

Efficient response recovery procedures for detailed design of jacket foundations. / Nielsen, Martin Bjerre; Jensen, Jacob Fisker; Augustyn, Dawid Jakub; Pedersen, Ronnie.

Insights and Innovations in Structural Engineering, Mechanics and Computation. Bind 1 1. udg. Taylor & Francis, 2016. s. 2060-2065.

Publikation: Bidrag til bog/antologi/rapport/konference proceedingKonferenceartikel i proceedingForskningpeer review

TY - GEN

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AU - Nielsen, Martin Bjerre

AU - Jensen, Jacob Fisker

AU - Augustyn, Dawid Jakub

AU - Pedersen, Ronnie

PY - 2016/9

Y1 - 2016/9

N2 - Two efficient system reduction procedures for detailed design of jacket foundations by post-processing of aero-elastic simulation results based on reduced structural models (superelements) are presented. It is illustrated that the full foundation response can be accurately recovered either via a force-controlled approach where the interface forces from the coupled aero-elastic simulations are applied to the non-reduced jacket model along with synchronized hydrodynamic wave loads in a dynamic time simulation, or by direct expansion via the superelement reduction basis. The procedures are illustrated on a coupled aero-elastic model represented by the NREL 5 MW reference wind turbine founded on a comprehensive, high-fidelity jacket model with hydrodynamics defined in Ramboll’s in-house offshore structural analysis program, ROSAP. The performances of both the force-controlled method and the direct expansion approach are compared for superelements based on the Guyan method, the Craig-Bampton method and an augmented Craig-Bampton method. It is shown that the Craig-Bampton method is superior to the Guyan method for dynamic problems irrespective of the recovery method. In particular for cases where wave loads are govern-ing, application of the direct expansion approach calls for the Augmented Craig-Bampton method in order to accurately capture the details of the hydrodynamic loading. It is shown that a compact, yet accurate reduction basis can be obtained by replacing some of the fixed interface modes with load dependent residual vectors.

AB - Two efficient system reduction procedures for detailed design of jacket foundations by post-processing of aero-elastic simulation results based on reduced structural models (superelements) are presented. It is illustrated that the full foundation response can be accurately recovered either via a force-controlled approach where the interface forces from the coupled aero-elastic simulations are applied to the non-reduced jacket model along with synchronized hydrodynamic wave loads in a dynamic time simulation, or by direct expansion via the superelement reduction basis. The procedures are illustrated on a coupled aero-elastic model represented by the NREL 5 MW reference wind turbine founded on a comprehensive, high-fidelity jacket model with hydrodynamics defined in Ramboll’s in-house offshore structural analysis program, ROSAP. The performances of both the force-controlled method and the direct expansion approach are compared for superelements based on the Guyan method, the Craig-Bampton method and an augmented Craig-Bampton method. It is shown that the Craig-Bampton method is superior to the Guyan method for dynamic problems irrespective of the recovery method. In particular for cases where wave loads are govern-ing, application of the direct expansion approach calls for the Augmented Craig-Bampton method in order to accurately capture the details of the hydrodynamic loading. It is shown that a compact, yet accurate reduction basis can be obtained by replacing some of the fixed interface modes with load dependent residual vectors.

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M3 - Article in proceeding

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SP - 2060

EP - 2065

BT - Insights and Innovations in Structural Engineering, Mechanics and Computation

PB - Taylor & Francis

ER -

Nielsen MB, Jensen JF, Augustyn DJ, Pedersen R. Efficient response recovery procedures for detailed design of jacket foundations. I Insights and Innovations in Structural Engineering, Mechanics and Computation. 1 udg. Bind 1. Taylor & Francis. 2016. s. 2060-2065 https://doi.org/10.1201/9781315641645-341